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Genetics of chilling response at early growth stage in rice: A recessive gene for tolerance and importance of acclimation 水稻生长早期低温反应的遗传:一个耐受的隐性基因和驯化的重要性
3区 生物学
AoB Plants Pub Date : 2023-11-08 DOI: 10.1093/aobpla/plad075
Akhil Ranjan Baruah, Hiroaki Bannai, Yan Meija, Ayumi Kimura, Haruka Ueno, Yohei Koide, Yuji Kishima, Jiwan Palta, Jun Kasuga, Masayuki P Yamamoto, Kazumitsu Onishi
{"title":"Genetics of chilling response at early growth stage in rice: A recessive gene for tolerance and importance of acclimation","authors":"Akhil Ranjan Baruah, Hiroaki Bannai, Yan Meija, Ayumi Kimura, Haruka Ueno, Yohei Koide, Yuji Kishima, Jiwan Palta, Jun Kasuga, Masayuki P Yamamoto, Kazumitsu Onishi","doi":"10.1093/aobpla/plad075","DOIUrl":"https://doi.org/10.1093/aobpla/plad075","url":null,"abstract":"Abstract Low-temperature adaptation in rice is mediated by the ability of a genotype to tolerate chilling temperatures. A genetic locus on chromosome 11 was analyzed for chilling tolerance at the plumule stage in rice. The tolerant allele of A58, a japonica landrace in Japan, was inherited as a recessive gene (ctp-1A58), whereas the susceptible alleles from wild rice (Ctp-1W107) and modern variety (Ctp-1HY) were the dominant genes. Another recessive tolerant allele (ctp-1Silewah) was found in a tropical japonica variety (Silewah). Fine-mapping revealed that a candidate gene for the ctp-1 locus encoded a protein similar to the nucleotide-binding domain and leucine-rich repeat (NLR) protein, in which frameshift mutation by a 73 bp-deletion might confer chilling tolerance in ctp-1A58. Analysis of near isogenic lines demonstrated that ctp-1A58 imparted tolerance effects only at severe chilling temperatures of 0.5 °C and 2 °C, both at plumule and seedling stages. Chilling acclimation treatments at wide range of temperatures (8 °C–16 °C) for 72 h concealed the susceptible phenotype of Ctp-1W107 and Ctp-1HY. Furthermore, short-term acclimation treatment of 12 h at 8 °C was enough to be fully acclimated. These results suggest that the NLR gene induces susceptible response upon exposure to severe chilling stress, however, another interacting gene(s) for acclimation response could suppress the maladaptive phenotype caused by the Ctp-1 allele. This study provides new insights for adaptation and breeding of rice in a low-temperature environment.","PeriodicalId":48955,"journal":{"name":"AoB Plants","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135430173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Retrieval of long DNA reads from herbarium specimens 从植物标本馆标本中提取长DNA
3区 生物学
AoB Plants Pub Date : 2023-11-08 DOI: 10.1093/aobpla/plad074
Anne-Sophie Quatela, Patrik Cangren, Farzaneh Jafari, Thibauld Michel, Hugo de Boer, Bengt Oxelman
{"title":"Retrieval of long DNA reads from herbarium specimens","authors":"Anne-Sophie Quatela, Patrik Cangren, Farzaneh Jafari, Thibauld Michel, Hugo de Boer, Bengt Oxelman","doi":"10.1093/aobpla/plad074","DOIUrl":"https://doi.org/10.1093/aobpla/plad074","url":null,"abstract":"Abstract High-throughput sequencing of herbarium specimens’ DNA with short-read platforms have helped explore many biological questions. Here, for the first time, we investigate the potential of using herbarium specimens as a resource for long read DNA sequencing technologies. We use target capture of 48 low copy nuclear loci in twelve herbarium specimens of Silene as a basis for long read sequencing using SMRT PacBio Sequel. The samples were collected between 1932 and 2019. A simple size selection protocol enabled retrieval of both long DNA fragments (> 1kb) and long on-target reads for nine of them. The limited sampling size does not enable statistical evaluation of the influence of specimen age to the DNA fragmentation, but our results confirm that younger samples, i.e. collected after 1990, are less fragmented and have better sequencing success than specimens collected before this date. Specimens collected between 1990 and 2019 yield between 167 and 3403 on-target reads > 1kb. They enabled recovering between 34 loci and 48 (i.e., all loci recovered). Three samples from specimens collected before 1990 did not yield on-target reads > 1 kb. The four other samples collected before this date yielded up to 144 reads, and recovered up to 25 loci. Young herbarium specimens seem promising for long read sequencing. However, older ones have partly failed. Further exploration would be necessary to statistically test and understand the potential of older material in the quest for long reads. We would encourage greatly expanding the sampling size and comparing different taxonomic groups.","PeriodicalId":48955,"journal":{"name":"AoB Plants","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135430171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Adaptive constraints at the range edge of a widespread and expanding invasive plant 一种广布扩张的入侵植物范围边缘的适应性约束
3区 生物学
AoB Plants Pub Date : 2023-11-05 DOI: 10.1093/aobpla/plad070
Rebecca A Fletcher, Daniel Z Atwater, David C Haak, Muthukumar V Bagavathiannan, Antonio DiTommaso, Erik Lehnhoff, Andrew H Paterson, Susan Auckland, Prabhu Govindasamy, Cornelia Lemke, Edward Morris, Lisa Rainville, Jacob N Barney
{"title":"Adaptive constraints at the range edge of a widespread and expanding invasive plant","authors":"Rebecca A Fletcher, Daniel Z Atwater, David C Haak, Muthukumar V Bagavathiannan, Antonio DiTommaso, Erik Lehnhoff, Andrew H Paterson, Susan Auckland, Prabhu Govindasamy, Cornelia Lemke, Edward Morris, Lisa Rainville, Jacob N Barney","doi":"10.1093/aobpla/plad070","DOIUrl":"https://doi.org/10.1093/aobpla/plad070","url":null,"abstract":"Abstract Identifying the factors that facilitate and limit invasive species range expansion has both practical and theoretical importance, especially at the range edges. Here, we used reciprocal common garden experiments spanning the North/South and East/West range North American core, intermediate, and range edges of the globally invasive plant, Johnsongrass (Sorghum halepense) to investigate the interplay of climate, biotic interactions (i.e., competition), and patterns of adaptation. Our results suggest that rapid range expansion of Johnsongrass into diverse environments across wide geographies occurred largely without local adaptation, but that further range expansion may be restricted by a fitness trade-off which limits population growth at the range edge. Interestingly, plant competition strongly dampened Johnsongrass growth but did not change the rank order performance of populations within a garden, though this varied among gardens (climates). Our findings highlight the importance of including the range edge when studying the range dynamics of invasive species, especially as we try to understand how invasive species will respond to accelerating global changes.","PeriodicalId":48955,"journal":{"name":"AoB Plants","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135725904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Telescopic peristomes, hygroscopic movement, and the spore release model of Regmatodon declinatus (Leskeaceae Bryophyta) 垂藓的伸缩荚膜、吸湿运动及孢子释放模型
3区 生物学
AoB Plants Pub Date : 2023-11-02 DOI: 10.1093/aobpla/plad073
Yanzhi Wu, Zhihui Wang, Zhaohui Zhang
{"title":"Telescopic peristomes, hygroscopic movement, and the spore release model of <i>Regmatodon declinatus</i> (Leskeaceae Bryophyta)","authors":"Yanzhi Wu, Zhihui Wang, Zhaohui Zhang","doi":"10.1093/aobpla/plad073","DOIUrl":"https://doi.org/10.1093/aobpla/plad073","url":null,"abstract":"Abstract Moss peristome hygroscopic movement plays an important role in protecting and controlling spore release. Recent studies on the peristome's hygroscopic movement and spore release have focused on mosses with \"perfect\" peristomes, such as Brachytheciaceae, whereas the hygroscopic movement type and spore release pattern of \"specialized\" peristomes, such as Regmatodon declinatus, are poorly understood. We investigated the relationship between the peristome's hygroscopic movement and spore release in the \"specialized\" peristome of R. declinatus by the measurement of peristome hygroscopic movement parameters and the hygroscopic movement spore release test. It was found that: ①Exostomes (EX) are significantly shorter than endostomes (EN), triggering the hygroscopic movement of telescopic peristomes, in which the EX rapidly elongate while closing in on the EN, and the teeth rapidly converge. ② Spore release was minimal when peristome movement was triggered alone. The number of spores released when exposed to wind was 124 times greater than in the absence of wind. Dry capsules released seven times more spores than wet capsules. The study reveals that the hygroscopic movement of \"telescopic\" peristomes of R. declinatus did not contribute significantly to spore release. More spores were released when wind and hygroscopic movement acted synergistically. Dry capsules released the maximum number of spores. It was also revealed that structural damage to capsules can facilitate complete spore release. Finally, we modeled the release of R. declinatus spores from initiation to complete release, namely the coupled release model of wind-water-capsule structural damage.","PeriodicalId":48955,"journal":{"name":"AoB Plants","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135975633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Interactions with fungi vary among Tripsacum dactyloides genotypes from across a precipitation gradient 与真菌的相互作用在跨降水梯度的雷公藤基因型中有所不同
3区 生物学
AoB Plants Pub Date : 2023-11-02 DOI: 10.1093/aobpla/plad072
Ceyda Kural-Rendon, Natalie E Ford, Maggie R Wagner
{"title":"Interactions with fungi vary among <i>Tripsacum dactyloides</i> genotypes from across a precipitation gradient","authors":"Ceyda Kural-Rendon, Natalie E Ford, Maggie R Wagner","doi":"10.1093/aobpla/plad072","DOIUrl":"https://doi.org/10.1093/aobpla/plad072","url":null,"abstract":"Abstract Plant-associated microbes, specifically fungal endophytes, augment the ability of many grasses to adapt to extreme environmental conditions. Tripsacum dactyloides (Eastern gamagrass) is a perennial, drought tolerant grass native to the tallgrass prairies of the central United States. The extent to which the microbiome of T. dactyloides contributes to its drought tolerance is unknown. Ninety-seven genotypes of T. dactyloides were collected from native populations across an east-west precipitation gradient in Kansas, Oklahoma, and Texas, then grown together in a common garden for over 20 years. Root and leaf samples were visually examined for fungal density. Because fungal endophytes confer drought tolerant capabilities to their host plants, we expected to find higher densities of fungal endophytes in plants from western, drier regions, compared to plants from eastern, wetter regions. Results confirmed a negative correlation between endophyte densities in roots and precipitation at the genotype’s original location (r = -0.21 p=0.04). Our analyses reveal that the host genotype’s origin along the precipitation gradient predicts the absolute abundance of symbionts in the root, but not the relative abundances of particular organisms nor the overall community composition. Overall, these results demonstrate that genetic variation for plant-microbe interactions can reflect historical environment, and reinforce the importance of considering plant genotype in conservation and restoration work in tallgrass prairie ecosystems.","PeriodicalId":48955,"journal":{"name":"AoB Plants","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135975801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Indigenous Australian grass seeds as grains: Macrostructure, microstructure and histochemistry 澳大利亚本土草籽:宏观结构、微观结构和组织化学
3区 生物学
AoB Plants Pub Date : 2023-11-01 DOI: 10.1093/aobpla/plad071
Farkhondeh Abedi, Claudia Keitel, Ali Khoddami, Salla Marttila, Angela L Pattison, Thomas H Roberts
{"title":"Indigenous Australian grass seeds as grains: Macrostructure, microstructure and histochemistry","authors":"Farkhondeh Abedi, Claudia Keitel, Ali Khoddami, Salla Marttila, Angela L Pattison, Thomas H Roberts","doi":"10.1093/aobpla/plad071","DOIUrl":"https://doi.org/10.1093/aobpla/plad071","url":null,"abstract":"Abstract Utilisation of grains of local grasses by Australia’s First Nations people for food and connection to Country has largely been lost due to colonisation. Native Australian grain production has the potential to deliver environmental, economic, nutritional and cultural benefits to First Nations people and the wider community. Revitalisation of the native grain food system can only be achieved if relevant properties of the grains are elucidated. This study aimed to characterise the grain structure and histochemistry of four Australian native grasses: Dactyloctenium radulans (Button Grass), Astrebla lappacea (Curly Mitchell Grass), Panicum decompositum (Native Millet) and Microlaena stipoides (Weeping Grass). For these species, as well as wheat and sorghum, whole-grain images were obtained via stereo microscopy, starch and the embryo were visualised, and sections of fixed grains were imaged via bright-field and fluorescence microscopy. The shape, size and colour of the whole native grains varied between the species. The aleurone layer was one-cell thick in the native species, as in the domesticated grains, except for Weeping Grass, which had a two-cell-thick aleurone. In the native grains, endosperm cell walls appeared thinner than in wheat and sorghum. Starch granules in Button Grass, Curly Mitchell Grass and Native Millet were found mainly in the central region of the starchy endosperm, with very few granules in the sub-aleurone layer, whereas Weeping Grass had abundant starch in the sub-aleurone. Protein appeared most abundant in the aleurone and sub-aleurone layers of the native grains, although in Button Grass, the starchy endosperm was observed to be rich in protein, as in wheat and sorghum. As a proportion of the whole grain, the embryo was larger in the native species than in wheat. The differences found in the grain properties among the four native Australian species have important implications for the agri-food industry in a changing climate.","PeriodicalId":48955,"journal":{"name":"AoB Plants","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135510225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Tracking canopy chlorophyll fluorescence with a low-cost light emitting diode platform. 利用低成本发光二极管平台跟踪冠层叶绿素荧光。
IF 2.6 3区 生物学
AoB Plants Pub Date : 2023-10-18 eCollection Date: 2023-10-01 DOI: 10.1093/aobpla/plad069
Logan E G Brissette, Christopher Y S Wong, Devin P McHugh, Jessie Au, Erica L Orcutt, Marie C Klein, Troy S Magney
{"title":"Tracking canopy chlorophyll fluorescence with a low-cost light emitting diode platform.","authors":"Logan E G Brissette, Christopher Y S Wong, Devin P McHugh, Jessie Au, Erica L Orcutt, Marie C Klein, Troy S Magney","doi":"10.1093/aobpla/plad069","DOIUrl":"10.1093/aobpla/plad069","url":null,"abstract":"<p><p>Chlorophyll fluorescence measured at the leaf scale through pulse amplitude modulation (PAM) has provided valuable insight into photosynthesis. At the canopy- and satellite-scale, solar-induced fluorescence (SIF) provides a method to estimate the photosynthetic activity of plants across spatiotemporal scales. However, retrieving SIF signal remotely requires instruments with high spectral resolution, making it difficult and often expensive to measure canopy-level steady-state chlorophyll fluorescence under natural sunlight. Considering this, we built a novel low-cost photodiode system that retrieves far-red chlorophyll fluorescence emission induced by a blue light emitting diode (LED) light source, for 2 h at night, above the canopy. Our objective was to determine if an active remote sensing-based night-time photodiode method could track changes in canopy-scale LED-induced chlorophyll fluorescence (LEDIF) during an imposed drought on a broadleaf evergreen shrub, <i>Polygala myrtifolia</i>. Far-red LEDIF (720-740 nm) was retrieved using low-cost photodiodes (LEDIF<sub>photodiode</sub>) and validated against measurements from a hyperspectral spectroradiometer (LEDIF<sub>hyperspectral</sub>). To link the LEDIF signal with physiological drought response, we tracked stomatal conductance (<i>g</i><sub>sw</sub>) using a porometer, two leaf-level vegetation indices-photochemical reflectance index and normalized difference vegetation index-to represent xanthophyll and chlorophyll pigment dynamics, respectively, and a PAM fluorimeter to measure photochemical and non-photochemical dynamics. Our results demonstrate a similar performance between the photodiode and hyperspectral retrievals of LEDIF (<i>R</i><sup>2</sup> = 0.77). Furthermore, LEDIF<sub>photodiode</sub> closely tracked drought responses associated with a decrease in photochemical quenching (<i>R</i><sup>2</sup> = 0.69), <i>F</i><sub>v</sub>/<i>F</i><sub>m</sub> (<i>R</i><sup>2</sup> = 0.59) and leaf-level photochemical reflectance index (<i>R</i><sup>2</sup> = 0.59). Therefore, the low-cost LEDIF<sub>photodiode</sub> approach has the potential to be a meaningful indicator of photosynthetic activity at spatial scales greater than an individual leaf and over time.</p>","PeriodicalId":48955,"journal":{"name":"AoB Plants","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10626922/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71487784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Huntiella decorticans and drought on Nothofagus dombeyi seedlings. 黄铁藻和干旱对董贝幼苗生长的影响。
IF 2.9 3区 生物学
AoB Plants Pub Date : 2023-10-10 eCollection Date: 2023-10-01 DOI: 10.1093/aobpla/plad068
Pablo Masera, María Belén Pildain, Mariano Aquino, Andrés De Errasti, Guillermina Dalla Salda, Mario Rajchenberg, María Florencia Urretavizcaya
{"title":"Effect of <i>Huntiella decorticans</i> and drought on <i>Nothofagus dombeyi</i> seedlings.","authors":"Pablo Masera,&nbsp;María Belén Pildain,&nbsp;Mariano Aquino,&nbsp;Andrés De Errasti,&nbsp;Guillermina Dalla Salda,&nbsp;Mario Rajchenberg,&nbsp;María Florencia Urretavizcaya","doi":"10.1093/aobpla/plad068","DOIUrl":"https://doi.org/10.1093/aobpla/plad068","url":null,"abstract":"<p><p>In the temperate forests of Patagonia, Argentina, <i>Nothofagus dombeyi</i>, commonly known as Coihue, has shown sensitivity to intense drought events, leading to mortality. Studies have been conducted on Coihue decline and mortality using a variety of approaches, including the role of extreme heat waves and drought, pests and pathogens, particularly the fungus <i>Huntiella decorticans</i>. This work aimed to evaluate survival, vitality, necrosis extension and growth response of inoculated and non-inoculated Coihue seedlings from different provenances exposed to different soil moisture levels. To achieve this goal, 96 Coihue seedlings from 2 different provenances were assigned to 8 different experimental treatments. Treatments were composed of the presence or absence of <i>H. decorticans</i> and different soil moisture content conditions, dry, wet and the exposure to dry condition at different times of the experiment. Both dry conditions and <i>H. decorticans</i> had negative effects on the survival and growth rate of Coihue. The combination of both factors resulted in 100 % mortality, regardless of the plants' geographical provenances. Mortality began to be observed 3 months after pathogen inoculation, during the warmest month. Necrosis extension produced by the pathogen was similar for most of the inoculated treatments. The treatment under wet condition during the experiment but subjected to dry condition in the previous growing season presented lower necrosis extension (8.4 ± 3.2 %), than the other treatments. The radial increase was also affected by the treatments and geographical provenance, being those plants exposed to dry conditions which grew less (0.19 ± 0.21 mm). This study enhances our understanding of the plant-pathogen interaction. According to our results, Coihue may become more susceptible to mortality, when <i>H. decorticans</i> and water deficit conditions act synergistically.</p>","PeriodicalId":48955,"journal":{"name":"AoB Plants","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10601059/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71414918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Staminal hairs increase pollinator attraction and pollination accuracy in Tradescantia fluminensis (Commelinaceae). 鸭跖草科的雄蕊毛增加了对传粉昆虫的吸引力和授粉精度。
IF 2.9 3区 生物学
AoB Plants Pub Date : 2023-10-01 DOI: 10.1093/aobpla/plad067
Deng-Fei Li, Yi-Dan Chen, Zhen Liu, Ai-Ting Liang, Ju Tang, Xian-Chun Yan
{"title":"Staminal hairs increase pollinator attraction and pollination accuracy in <i>Tradescantia fluminensis</i> (Commelinaceae).","authors":"Deng-Fei Li,&nbsp;Yi-Dan Chen,&nbsp;Zhen Liu,&nbsp;Ai-Ting Liang,&nbsp;Ju Tang,&nbsp;Xian-Chun Yan","doi":"10.1093/aobpla/plad067","DOIUrl":"https://doi.org/10.1093/aobpla/plad067","url":null,"abstract":"<p><p>Staminal hairs are the particular appendages of stamens, which may affect pollinator foraging behaviour and pollen transfer. However, experimental evidence of the functions of staminal hairs in pollination remains scarce. Here, we conducted staminal hair manipulation experiments in <i>Tradescantia fluminensis</i> (Commelinaceae) to investigate their effects on visitation and pollen transfer by bees. Our observations revealed that both visitation rates and visit duration of honeybees (<i>Apis cerana</i>) to control flowers were significantly higher than that of hairless flowers. Moreover, removing the staminal hairs significantly decreased pollen deposition by honeybees (<i>A. cerana</i>), but did not affect pollen removal. The staminal hair was similar in length to the stamen and the pistil of <i>T. fluminensis</i>. The staminal hairs provide more footholds for honeybees, and they lay prone on the staminal hairs to collect pollen, which increased the accuracy of pollination through the consistent pollen placement and pick-up on the ventral surface of honeybees. These results showed that the staminal hairs in <i>T. fluminensis</i> may represent an adaptation to attract pollinators and enhance pollination accuracy.</p>","PeriodicalId":48955,"journal":{"name":"AoB Plants","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10601385/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71414923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An overview of secretion in floral bracts of Tillandsioideae (Bromeliaceae), with emphasis on the secretory scales. 标题蒂兰总科(凤梨科)花苞片分泌的研究概况,并着重介绍分泌鳞片。
IF 2.9 3区 生物学
AoB Plants Pub Date : 2023-09-26 eCollection Date: 2023-10-01 DOI: 10.1093/aobpla/plad066
Igor Ballego-Campos, Rafaela C Forzza, Élder A S Paiva
{"title":"An overview of secretion in floral bracts of Tillandsioideae (Bromeliaceae), with emphasis on the secretory scales.","authors":"Igor Ballego-Campos,&nbsp;Rafaela C Forzza,&nbsp;Élder A S Paiva","doi":"10.1093/aobpla/plad066","DOIUrl":"https://doi.org/10.1093/aobpla/plad066","url":null,"abstract":"<p><p>Bromeliaceae display many water-use strategies, from leaf impounding tanks to Crassulacean acid metabolism (CAM) photosynthesis and absorbing trichomes. Recent studies show that trichomes in inflorescences of bromeliads can exude viscous secretions, protecting against various stresses, including excessive water loss. In light of this, and considering the knowledge gap regarding inflorescence trichomes in bromeliads, we aimed to investigate the presence, source and chemical nature of inflorescence secretions in species of the Tillandsioideae (Bromeliaceae) and to describe the anatomy of their floral bracts focusing on trichome structure and position. We conducted a prospection of secretory activity and anatomy in floral bracts in 52 species of Tillandsioideae and 1 early divergent Bromeliaceae species. We used histochemical tests to investigate the presence and nature of secretion combined with standard light microscopy methods. Secretion appears in all studied species of tribe Vrieseeae, in <i>Guzmania</i> species, <i>Wallisia cyanea</i>, <i>Tillandsia streptopylla</i> (Tillandsieae) and <i>Catopsis morreniana</i> (Catopsideae). It is absent in <i>Vriesea guttata</i> (Vrieseeae), <i>Racinaea crispa</i> and various <i>Tillandsia</i> species (Tillandsieae). Secretion is produced by peltate trichomes on the adaxial surface of young bracts and comprises hydrophilic and lipophilic substances. Bract anatomy revealed an internal mucilage-secreting tissue with wide distribution within the subtribe Vrieseinae. Our results point to a broad occurrence of secretion associated with bracteal scales in inflorescences of Tillandsioideae. Secretory function is strongly related to trichomes of the adaxial surface, whereas the indumentum of the abaxial side is lacking or likely associated with water absorption; the latter case is especially related to small, xeric plants. Exudates might engage in colleter-like roles, protecting against desiccation, high-radiation and herbivores. Directions for future research are presented.</p>","PeriodicalId":48955,"journal":{"name":"AoB Plants","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10601381/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71414917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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