Australian Journal of Botany最新文献_第8页

Can the galling Eriophyidae (Trombidiformes) manipulate leaf structural and histochemical profiles over environmental stressors? 在环境胁迫下，凶猛的剑叶虫科能控制叶片的结构和组织化学特征吗?

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2023-01-01 DOI: 10.1071/bt22091

M. S. Freitas, B. G. Ferreira, G. P. Bragança, D. Boanares, R. Isaias

引用次数: 0

First records of Myxomycetes associated with members of the Cactaceae in Australia 澳大利亚与仙人掌科成员相关的黏菌门的首次记录

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2022-12-21 DOI: 10.1071/bt22032

S. Stephenson, T. F. Elliott

{"title":"First records of Myxomycetes associated with members of the Cactaceae in Australia","authors":"S. Stephenson, T. F. Elliott","doi":"10.1071/bt22032","DOIUrl":"https://doi.org/10.1071/bt22032","url":null,"abstract":"Context Cacti are endemic to North and South America, but numerous species have been spread all over the world after Europeans visited the Americas. Their global spread has impacted various aspects of terrestrial ecosystems, including the distributions of succulenticolous myxomycetes. Aims In this study, we examine the association of myxomycetes (also known as plasmodial slime moulds or myxogastrids) with three introduced species of cacti in Australia. Methods Using the moist chamber culturing technique we prepared 33 cultures from dead portions of three species of cacti collected in New South Wales and Queensland. Key results Eighty-eight percent of moist chamber cultures yielded evidence of myxomycetes (either plasmodia or fruiting bodies). A total of 12 species representing six genera were recorded. Physarum compressum was the most abundant species (appearing in 20 of the 33 cultures), with species such as Perichaena depressa also relatively common. We also report the first records of Perichaena luteola in Australia. Conclusions This is the first study to investigate the assemblages of myxomycetes associated with members of the Cactaceae in Australia, and we highlight the occurrence of succulenticolous myxomycetes on the continent. Implications This study leads to a better understanding of the biogeography, distribution and ecology of succulenticolous myxomycetes. We also add a new species record for Australia.","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48462808","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

Sex and flowers: testing the resource-dependent selection hypothesis for flower sex allocation 性别与花：检验花性别分配的资源依赖性选择假说

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2022-07-18 DOI: 10.1071/bt22015

Jonathan T. D. Finch, Alexander Watson‐Lazowski, J. Cook

{"title":"Sex and flowers: testing the resource-dependent selection hypothesis for flower sex allocation","authors":"Jonathan T. D. Finch, Alexander Watson‐Lazowski, J. Cook","doi":"10.1071/bt22015","DOIUrl":"https://doi.org/10.1071/bt22015","url":null,"abstract":"Context Monoecious plants can adjust their proportional investment in male and female flowers to maximise reproductive fitness. The female reproductive function (seeds) often has greater resource costs than the male (pollen). Larger plants are generally thought to have greater resource availability and should have a female biased sex ratio, referred to as the size-dependent selection hypothesis. However, empirical tests of this hypothesis have found mixed support. This may be because size alone is not always a reliable proximate value for resource availability, which can be influenced by other abiotic factors. Aims Breynia oblongifolia (Phyllanthaceae) is a perennial monoecious plant with unisexual moth-pollinated flowers from eastern Australia. Fruit production in Breynia is heavily influenced by rainfall, which is highly variable. We hypothesised that where soil moisture limits female function, Breynia would produce more male flowers (i.e. resource-dependent selection). Methods We used a multi-year observational dataset to look for evidence of resource-dependent flower sex ratios in a wild population and conducted a manipulative glasshouse experiment to test alternative hypotheses for flower sex selection. Key results In both our manipulative glasshouse experiment and observed wild population, decreasing soil water content resulted in higher proportions of male flowers, supporting the resource-dependent sex selection hypothesis. Conclusions Soil moisture influences flower sex ratios but plant size does not. Implications Future studies should not assume that height equates to resource wealth, as this is often overly simplistic and ignores the potential for key resources, like soil moisture or light, to fluctuate.","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45087648","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

Neil Ross – winner of the 2021 Neil Ross–2021年度冠军

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2022-05-30 DOI: 10.1071/bt22045

Dick Williams

引用次数: 0

Historical persistence and isolation by distance of Mirbelia viminalis (Fabaceae) across the Hamersley Range of the Pilbara bioregion 在Pilbara生物区的Hamersley山脉中紫菀(Fabaceae)的历史持久性和距离隔离

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2022-01-01 DOI: 10.1071/bt22014

M. Millar, R. M. Binks, Sarah‐Louise Tapper, B. Macdonald, S. McArthur, M. Hankinson, D. Coates, S. van Leeuwen, M. Byrne

引用次数: 0

Vale Beth Gott, AM, MSc (Melb), PhD (Lond.) Plant Physiologist, Ethnobotanist, Teacher (25 July 1922 to 8 July 2022) 瓦尔·贝丝·戈特，AM, MSc (Melb)， PhD (Lond)。植物生理学家，民族植物学家，教师(1922年7月25日至2022年7月8日)