Australian Journal of Botany最新文献

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Floral biology, pollinators and breeding system of Passiflora chrysophylla (Passifloraceae), a South American passion vine 南美西番莲(西番莲科)的花生物学、传粉媒介和繁殖系统
IF 1.1 4区 生物学
Australian Journal of Botany Pub Date : 2024-09-02 DOI: 10.1071/bt24016
María T. Amela García
{"title":"Floral biology, pollinators and breeding system of Passiflora chrysophylla (Passifloraceae), a South American passion vine","authors":"María T. Amela García","doi":"10.1071/bt24016","DOIUrl":"https://doi.org/10.1071/bt24016","url":null,"abstract":"<strong> Context</strong><p>Knowledge of the reproductive biology of plants is fundamental for conservation, especially of the ones with a limited distribution.</p><strong> Aims</strong><p>The sexual reproduction of the small-ranged <i>Passiflora chrysophylla</i> Chod. was studied.</p><strong> Methods</strong><p>Controlled pollinations were performed to assess the breeding system, whereas floral traits and visitors (identity, frequency, activity on the flowers, dimensions and pollen load) were analysed to assess the pollination mechanism.</p><strong> Key results</strong><p>Self-compatibility was partial. Anthesis was matinal. The odour emitted by the corona was sweet, whereas the odour emitted by the persistent sepals and bracts was similar to that of the leaves. Contrasting concentric circular reward guides were present in the visible and UV spectra. Nectar concentration was high, the volume increased throughout anthesis and, if removed, nectar was replenished only once during the flower lifespan. Style movements towards the anthers determined male and hermaphroditic phases in most of the flowers; in a few flowers (smaller, scented and nectarless), styles remained apart from the anthers, thus constituting a functionally andromonecious and deceptive automimicry system. The bees <i>Ptiloglossa</i> sp., <i>Thygater analis</i> and <i>Xylocopa augusti</i> acted as pollinators, whereas ants, butterflies and beetles were nectar or pollen thieves and florivores.</p><strong> Conclusions</strong><p><i>P. chrysophylla</i> is melittophilous and pollinators increase reproductive success.</p><strong> Implications</strong><p>Pollination biology of <i>P. chrysophylla</i>, reported for the first time, would contribute to conservation management of this species with restricted distribution.</p>","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Variable seed quality hampers the use of Themeda triandra (Poaceae) for seed production, agriculture, research and restoration: a review 种子质量参差不齐阻碍了三棱草(Poaceae)用于种子生产、农业、研究和恢复:综述
IF 1.1 4区 生物学
Australian Journal of Botany Pub Date : 2024-08-27 DOI: 10.1071/bt24011
Marne Durnin, Emma Dalziell, Suzanne M. Prober, Petra Marschner
{"title":"Variable seed quality hampers the use of Themeda triandra (Poaceae) for seed production, agriculture, research and restoration: a review","authors":"Marne Durnin, Emma Dalziell, Suzanne M. Prober, Petra Marschner","doi":"10.1071/bt24011","DOIUrl":"https://doi.org/10.1071/bt24011","url":null,"abstract":"<p><i>Themeda triandra</i> (Forssk.) is a tussock grass of international importance for its keystone role in grassy ecosystems and, hence, is often a focus for seed production, research and ecological restoration. However, these applications can be challenged by its seed biology, including seed dormancy and the variability of seed traits among populations. The literature on these topics has not been well synthesised. To address this, we reviewed the relevant literature for <i>Themeda triandra</i> seed and found that seed quality is often poor but highly variable, and there are no current quality-assurance standards. Seed characteristics such as weight, awn length and desiccation tolerance can vary with seed ploidy (i.e. the number of chromosome sets). Germination rates of fresh <i>Themeda triandra</i> seed can be as low as 5%, which may be due to seed dormancy. Dormancy varies among populations and with seasonal conditions, and a period of dry storage at room temperature for 8–10 months may be needed before it will reach its full germination potential. No single treatment is effective in overcoming dormancy across all populations. The application of gibberellic acid can increase germination by ~30% in some populations. Although plant-derived smoke products can be effective, they also lack standardisation. Other treatments including the application of heat, or wet–dry cycling warrant further investigation. We recommend the standardisation of <i>Themeda triandra</i> seed testing and labelling, which would allow end users to assess value for money when purchasing seed commercially.</p>","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Differential copper toxicity in Amazon tree species explained by seed germination and initial seedling growth 种子萌发和幼苗初期生长对亚马逊树种铜毒性差异的解释
IF 1.1 4区 生物学
Australian Journal of Botany Pub Date : 2024-07-26 DOI: 10.1071/bt23089
Ana Caroline de Jesus de Castro, Josiane Celerino de Carvalho, Flávia Camila Schimpl, Joelma Keith Rodrigues, Antônia Vitória Ferreira de Souza, Andreia Varmes Fernandes, Wagner Luíz Araújo, José Francisco de Carvalho Gonçalves
{"title":"Differential copper toxicity in Amazon tree species explained by seed germination and initial seedling growth","authors":"Ana Caroline de Jesus de Castro, Josiane Celerino de Carvalho, Flávia Camila Schimpl, Joelma Keith Rodrigues, Antônia Vitória Ferreira de Souza, Andreia Varmes Fernandes, Wagner Luíz Araújo, José Francisco de Carvalho Gonçalves","doi":"10.1071/bt23089","DOIUrl":"https://doi.org/10.1071/bt23089","url":null,"abstract":"<strong> Context</strong><p>A combination of industrial activities, agricultural practices, and poor urban planning has led to soil and plant contamination throughout the world. Heavy metal stress responses in plants have been demonstrated in various studies, but it remains unclear how heavy metals affect tree germination and initial establishment.</p><strong> Aims</strong><p>With a focus on species selection for phytoremediation programs in areas with copper (Cu) soil contamination, we aimed to evaluate seed germination, initial growth, and carbohydrate and protein metabolism of seedlings of <i>Hymenaea courbaril, Stryphnodendron pulcherrimum</i>, and <i>Hevea brasiliensis</i> subjected to normal and high (500 mg kg<sup>−1</sup>) concentrations of Cu. We hypothesised that there are differences in the Cu effects and plant responses on germination, initial growth, and the metabolism of seedlings from different Amazon tree species.</p><strong> Methods</strong><p>The germination experiment was conducted with seeds of the tree forest species in the absence or presence of Cu. After germination-parameter analyses, biometric variables, soluble sugars, starch, and proteins were measured.</p><strong> Key results</strong><p>In the presence of Cu, the germination traits, and morphological variables of <i>H. brasiliensis</i> were changed, whereas Cu did not strongly affect the other species. All species showed a high metabolic adjustment capacity, with little impact on the metabolism of carbon and nitrogen-related compounds in seeds. Overall, it was therefore possible to verify that <i>S. pulcherrimum</i> and <i>H. courbaril</i> were able to tolerate Cu because of their good performance in the germination stage and maintenance of essential metabolites, whereas <i>H. brasiliensis</i> was more sensitive to the presence of this heavy metal.</p><strong> Conclusions</strong><p>Our results provided insights into the ability of tree species to cope with Cu stress and the hypothesis has been confirmed to interspecific differential tolerance.</p><strong> Implications</strong><p>Amazonian tree species show valuable potential for improving phytoremediation programs with a focus on soil contamination by Cu.</p>","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fungi associated with seeds of the invasive grass Nassella trichotoma (serrated tussock) in its native range as prospective biological control agents 与原产地的外来入侵草Nassella trichotoma(锯齿草)种子有关的真菌作为未来的生物控制剂
IF 1.1 4区 生物学
Australian Journal of Botany Pub Date : 2024-07-22 DOI: 10.1071/bt24006
Bárbara Angeletti, Freda E. Anderson, Alejandro Loydi
{"title":"Fungi associated with seeds of the invasive grass Nassella trichotoma (serrated tussock) in its native range as prospective biological control agents","authors":"Bárbara Angeletti, Freda E. Anderson, Alejandro Loydi","doi":"10.1071/bt24006","DOIUrl":"https://doi.org/10.1071/bt24006","url":null,"abstract":"<strong> Context</strong><p>The South American grass <i>Nassella trichotoma</i> (serrated tussock) is widely distributed in central Argentina and one of the most damaging invasive species in Australia, New Zealand, and South Africa. In Australia, it is a weed of national significance.</p><strong> Aims</strong><p>Our aim was to characterise the fungi able to colonise <i>N. trichotoma</i> seeds buried at a site in south-western Buenos Aires province, Argentina, and measure their impact on seed survival and germination.</p><strong> Methods</strong><p>We tested the germination of healthy seeds at the beginning of the experiment (control). We buried 10 mesh bags containing 100 disinfected <i>N. trichotoma</i> seeds each, during 3 months in spring and autumn. At the end of each experiment, the contents of five of the bags were counted and classified as germinated, healthy, damaged, or disintegrated. Germination tests were then conducted with seeds of the latter three categories. The remaining seeds were used for recording fungal signs/symptoms, and the isolation of fungi.</p><strong> Key results</strong><p>We identified and described a diverse group of fungi associated with the seeds and a seasonal variation in the specific composition. Seeds showing fungal signs and/or symptoms germinated less than the control.</p><strong> Conclusions</strong><p>This is the first study on fungi associated with seeds of this species in the native range, which can affect their survival and longevity.</p><strong> Implications</strong><p>It is expected that studies on the seed microbiome may help us understand the differences in behaviour of the plant between ranges, and test the enemy-release hypothesis.</p>","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Plant life-history data as evidence of an historical mixed-severity fire regime in Banksia Woodlands 植物生命史数据是银杏林历史上混合严重性火灾机制的证据
IF 0.9 4区 生物学
Australian Journal of Botany Pub Date : 2024-07-11 DOI: 10.1071/bt23098
Russell G. Miller, Neal J. Enright, Joseph B. Fontaine, David J. Merritt, Ben P. Miller
{"title":"Plant life-history data as evidence of an historical mixed-severity fire regime in Banksia Woodlands","authors":"Russell G. Miller, Neal J. Enright, Joseph B. Fontaine, David J. Merritt, Ben P. Miller","doi":"10.1071/bt23098","DOIUrl":"https://doi.org/10.1071/bt23098","url":null,"abstract":"Context The concept of the fire regime is central to understanding and managing fire-prone ecosystems globally, and information on past regimes can provide useful insights into species disturbance adaptations. Although observations from satellite imagery or palaeoecological proxy data can provide direct evidence of past, pre-colonial fire regimes, they may be limited in temporal or spatial resolution and are not available for all ecosystems. However, fire-related plant-trait and demographic data offer an alternative approach to understand species–fire regime associations at the ecosystem scale. Aims We aimed to quantify the life-history strategies and associated fire regimes for six co-occurring shrub and tree species from fire-prone, Mediterranean-climate Banksia Woodlands in south-western Australia. Methods We collected static demographic data on size structure, seedling recruitment, and plant mortality across sites of varying time since last fire. We combined demographic data with key fire-related species traits to define plant life-history strategies. We then compared observed life histories with a priori expectations for surface, stand-replacing, and mixed-severity fire-regime types to infer historical fire-regime associations. Key results Fire-killed shrubs and weakly serotinous trees had abundant post-fire seedling recruitment, but also developed multi-cohort populations during fire-free periods via inter-fire seedling recruitment. Resprouting shrubs had little seedling recruitment at any time, even following fire, and showed no signs of decline in the long absence of fire, likely owing to their very long lifespans. Conclusions The variation in life-history strategies for these six co-occurring species is consistent with known ecological strategies to cope with high variation in fire intervals in a mixed-severity fire regime. Whereas resprouting and strong post-fire seedling recruitment indicate a tolerance of shorter fire intervals, inter-fire recruitment and weak serotiny are interpreted as a bet-hedging strategy to cope with occasional long fire-free periods that may otherwise exceed adult and seed-bank lifespans. Implications Our findings suggested that Banksia Woodlands have evolved with highly variable fire intervals in a mixed-severity fire regime. Further investigations of species adaptations to varying fire size and patchiness can help extend our understanding of fire-regime tolerances.","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141657659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pollination by multiple species of nectar foraging Hymenoptera in Prasophyllum innubum, a critically endangered orchid of the Australian Alps 澳大利亚阿尔卑斯山极度濒危的兰花 Prasophyllum innubum 中多种觅蜜膜翅目昆虫的授粉活动
IF 1.1 4区 生物学
Australian Journal of Botany Pub Date : 2024-07-08 DOI: 10.1071/bt23110
Tobias Hayashi, Bronwyn M. Ayre, Björn Bohman, Graham R. Brown, Noushka Reiter, Ryan D. Phillips
{"title":"Pollination by multiple species of nectar foraging Hymenoptera in Prasophyllum innubum, a critically endangered orchid of the Australian Alps","authors":"Tobias Hayashi, Bronwyn M. Ayre, Björn Bohman, Graham R. Brown, Noushka Reiter, Ryan D. Phillips","doi":"10.1071/bt23110","DOIUrl":"https://doi.org/10.1071/bt23110","url":null,"abstract":"<strong> Context</strong><p>Australia has numerous threatened species of terrestrial orchid, with a particularly high incidence of rarity in the genus <i>Prasophyllum</i> R.Br. Although there has been research on mycorrhizal associations and propagation, little is known about the reproductive ecology of threatened <i>Prasophyllum</i>. Understanding which animals are responsible for pollination and the impact of herbivores on reproduction may inform conservation actions.</p><strong> Aims</strong><p>For the nationally Critically Endangered <i>Prasophyllum innubum</i>, we aimed to determine the pollinator species, test for self-pollination, quantify levels of reproductive success and herbivory, and identify herbivores.</p><strong> Methods</strong><p>Pollinator observations were undertaken at wild populations of <i>P. innubum</i>, whereas an experiment testing for self-pollination was undertaken in shadehouse conditions. We quantified reproductive success and herbivory at two populations and attempted to identify herbivores using game cameras.</p><strong> Key results</strong><p>Pollination occurred via three species of bee and a sphecid wasp, all of which attempted feeding on floral nectar. Fruit set averaged 72–84% at wild sites, whereas only 6% of flowers set fruit via self-pollination when insects were excluded. Just 4% of inflorescences were completely consumed by herbivores, and no herbivory was captured on camera.</p><strong> Conclusions</strong><p><i>P. innubum</i> has a generalist rewarding pollination system that confers high levels of reproductive success, with herbivory having little impact on reproduction.</p><strong> Implications</strong><p>Pollinator availability is unlikely to restrict conservation translocation site selection of <i>P. innubum</i> because of a generalist pollination system. If herbivores are a threat for this species, it is likely to be through alteration of habitat rather than direct grazing.</p>","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141573080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Strategies of air space acquisition in Neotropical savanna trees differing in leaf habit 叶片习性不同的新热带稀树草原树木获取空气空间的策略
IF 1.1 4区 生物学
Australian Journal of Botany Pub Date : 2024-06-24 DOI: 10.1071/bt23087
Nayara Magry Jesus Melo, Carlos Henrique Britto de Assis Prado, Denilson Rodrigo Vieira Branco, João Paulo Souza
{"title":"Strategies of air space acquisition in Neotropical savanna trees differing in leaf habit","authors":"Nayara Magry Jesus Melo, Carlos Henrique Britto de Assis Prado, Denilson Rodrigo Vieira Branco, João Paulo Souza","doi":"10.1071/bt23087","DOIUrl":"https://doi.org/10.1071/bt23087","url":null,"abstract":"<strong> Context</strong><p>The Cerrado <i>stricto sensu</i> is a physiognomy under a seasonal climate of Cerrado vegetation, a Neotropical savanna, showing insignificant light restriction for adult tree species with branches above the herbaceous stratum.</p><strong> Aims</strong><p>We capture shoot and foliage production in 15 Cerrado tree species with distinct leaf phenology, following marked buds to investigate the strategies of air space acquisition and the influence of monthly air temperature and rainfall over a growing season.</p><strong> Methods</strong><p>Five buds were marked in every five individuals per species during the 2016 dry season in deciduous, semideciduous, and evergreen trees, encompassing five species per leaf habit.</p><strong> Key results</strong><p>Deciduous trees had plagiotropic shoots with 35° of inclination, whereas semideciduous and evergreen species had orthotropic (60°) shoots. Evergreen <i>Miconia albicans</i> was the single study species with a second-order shoot, and apical meristem death occurred only in deciduous trees. Two deciduous trees (<i>Caryocar brasiliense</i> and <i>Diospyros hispida</i>) and semideciduous <i>Eriotheca gracilipes</i> increased leaf number per shoot with monthly total precipitation. <i>D. hispida</i> and <i>E. gracilipes</i> also showed a positive correlation among shoot length, monthly air temperature, and monthly precipitation.</p><strong> Conclusions</strong><p>Only 3 of the 15 studied species showed a correlation between shoot or foliage production and monthly climate variables during the wet growing season. Deciduous trees avoid foliage self-shading, producing slanting short shoots with leaf flush preceding heavy rains, facilitating rapid branch and foliage formation to offset the leaf-free period quickly. Conversely, evergreen trees, characterised by orthotropic long shoots and slower vegetative growth, rely on foliage self-shading to sustain leaf persistence during seasonal drought. Semideciduous species commonly exhibited shoot- and leaf-trait variables such as those observed, on average, in deciduous or evergreen trees, resulting in a continuous spectrum of trait variations among the leaf phenological groups.</p><strong> Implications</strong><p>Each growth strategy in every leaf habit showed a particular air space acquisition across seasons, usually keeping shoot and foliage production independent of monthly climate variability in the wet growing season. These findings emphasised the significance of characterising the leaf phenological assemblages of the vast Cerrado woody flora as inherent functional groups in a continuum of crown trait variation, enabling the identification of strategies to capture, use, and store resources in each tree group.</p>","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141501032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determining the moisture content of Acacia seeds 确定金合欢种子的水分含量
IF 1.1 4区 生物学
Australian Journal of Botany Pub Date : 2024-06-24 DOI: 10.1071/bt24021
Geoffrey E. Burrows
{"title":"Determining the moisture content of Acacia seeds","authors":"Geoffrey E. Burrows","doi":"10.1071/bt24021","DOIUrl":"https://doi.org/10.1071/bt24021","url":null,"abstract":"<p>In a recent paper in <i>Southern Forests</i>, Jaganathan and co-workers indicated that the low constant-temperature drying method (LCTDM) (103°C for 17 h) is satisfactory for determining moisture content (MC) in seeds with physical dormancy (PY). Would this recommendation apply to <i>Acacia</i>, a large genus (1000+ species) with a seed coat so strong that seeds in the soil can maintain high viability for many decades? MC was assessed, using the LCTDM, in six Australian <i>Acacia</i> species by comparing intact seeds with those cut in half. Halved seeds of all species lost moisture rapidly and their mass had largely stabilised after about 2–3 h. Intact seeds had a wide variation in moisture-loss patterns. In some species, the testa was morphologically unchanged after 24 h at 103°C and this was associated with a relatively slow moisture loss. In other species, the testa had completely shattered after 8 h, leading to a rapid moisture loss. If the LCTDM is used to determine MC in <i>Acacia</i> species, it is advisable to employ a technique that substantially disrupts the testa.</p>","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141501033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Schoenoplectus californicus (Cyperaceae) amorphous silica contribution to the silicon cycle in pampean shallow lakes: an analysis of spatio-temporal variation and silicon–lignin relations Schoenoplectus californicus(香蒲科)无定形二氧化硅对潘潘浅湖硅循环的贡献:时空变化和硅-木质素关系分析
IF 1.1 4区 生物学
Australian Journal of Botany Pub Date : 2024-06-18 DOI: 10.1071/bt23084
Mara De Rito, Natalia Borrelli, Marcela Natal, Mariana Fernández Honaine
{"title":"Schoenoplectus californicus (Cyperaceae) amorphous silica contribution to the silicon cycle in pampean shallow lakes: an analysis of spatio-temporal variation and silicon–lignin relations","authors":"Mara De Rito, Natalia Borrelli, Marcela Natal, Mariana Fernández Honaine","doi":"10.1071/bt23084","DOIUrl":"https://doi.org/10.1071/bt23084","url":null,"abstract":"<strong> Context</strong><p>Phytoliths constitute an important source of silicon in terrestrial and aquatic ecosystems. <i>Schoenoplectus californicus</i> (C.A.Mey.) Soják (Cyperaceae) is an important phytolith producer.</p><strong> Aims</strong><p>We investigated the spatio-temporal variation in phytolith content of <i>S. californicus</i> in shallow lakes of the Pampean region, considering biomass and its relation to soil silicon content and lignin content.</p><strong> Methods</strong><p>Calcination techniques were applied to quantify phytoliths. The biomass was estimated by destructive methods. Soil silicon concentration was determined through ultraviolet–visible spectrophotometry by means of the silicomolybdate method. For lignin determination, a fibre analyser and sulfuric acid were used.</p><strong> Key results</strong><p>No significant differences were observed in the spatio-temporal analysis. There were no differences in the biomass estimation and in the phytolith per m<sup>2</sup> contribution. Regarding soil silicon content, when the concentration was low, the phytolith production was low. Lignin content remained constant between sites. No correlation was observed between phytolith and lignin content.</p><strong> Conclusions</strong><p><i>S. californicus</i> is an accumulator of amorphous silica, generating a constant quantity of phytoliths over the years and between sites. The variation in some environmental conditions does not seem to be enough to be reflected in plant silica production. No relation between lignin and silica was found, perhaps due to their different roles in plant structure.</p><strong> Implications</strong><p>The inclusion of other wetlands with more contrasting conditions may reveal the environmental constraints for the amorphous silica production. This study shows the importance of this community as a silicon source, and the implications of its displacement by other communities or urban development.</p>","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141501034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
APCalign: an R package workflow and app for aligning and updating flora names to the Australian Plant Census APCalign:根据澳大利亚植物普查对植物区系名称进行对齐和更新的 R 软件包工作流程和应用程序
IF 1.1 4区 生物学
Australian Journal of Botany Pub Date : 2024-06-13 DOI: 10.1071/bt24014
Elizabeth H. Wenk, William K. Cornwell, Anne Fuchs, Fonti Kar, Anna M. Monro, Hervé Sauquet, Ruby E. Stephens, Daniel S. Falster
{"title":"APCalign: an R package workflow and app for aligning and updating flora names to the Australian Plant Census","authors":"Elizabeth H. Wenk, William K. Cornwell, Anne Fuchs, Fonti Kar, Anna M. Monro, Hervé Sauquet, Ruby E. Stephens, Daniel S. Falster","doi":"10.1071/bt24014","DOIUrl":"https://doi.org/10.1071/bt24014","url":null,"abstract":"<p>Here we present ‘APCalign’, an R package and accompanying browser-sourced application to align and update scientific names for Australian vascular plants to the most likely currently accepted name in the Australian Plant Census (APC) or a name in the Australian Plant Names Index (APNI). Scientific names are the label assigned to unique taxon concepts by the scientific community, but this common terminology is most useful if a taxon concept is consistently referred to by the same name. These links can be broken because of either spelling mistakes or taxonomic changes. Automated tools are required to resolve taxon lists, aligning and updating long lists of possibly erroneous scientific names to the most likely currently accepted names. It is essential that tools specific to the APC/APNI be developed, because these lists specify an endorsed national-level nomenclature used in government legislation and include the uniquely Australian concept of phrase names, absent in global taxonomic datasets. To align input names to names within the APC or APNI, ‘APCalign’ works progressively through a sequence of checks that combine different permutations of the input name, exact versus fuzzy matches, matches that consider the entire name input versus a subset of words, and character strings that indicate a name can be resolved only to a genus or family. The aligned names are then, when possible, updated to a currently accepted taxon concept within the APC. This package should facilitate all research outputs that require diverse scientific name lists to be merged or outdated lists to be updated.</p>","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141501035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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