Maggie-Anne Harvey, Katherine Pinto Irish, Hugh H Harris, Peter D Erskine, Antony van der Ent
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The soils from the Hope Vale area were locally Se-enriched up to 48 mg Se kg-1, but there was no relationship between soil and plant Se concentrations. Synchrotron XFM analysis revealed that Se was localised in the blade margin tissue of the younger leaves, whilst the XAS analysis determined that Se occurs as an organo-Se compound. We report the occurrence of seleniferous soils in the Cape York Peninsula soils for the first time, which may partly explain the evolution of Se hyperaccumulation in C. decipiens. The extremely high concentrations of Se in the seeds is suggestive of an herbivory protection function. The capacity for this species to accumulate and hyperaccumulate Se from non-seleniferous soils is akin to other 'seed' based accumulators, such as some members of the Lecythidaceae family.</p>","PeriodicalId":8023,"journal":{"name":"Annals of botany","volume":null,"pages":null},"PeriodicalIF":3.6000,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The curious case of selenium hyperaccumulation in Coelospermum decipiens from the Cape York Peninsula (Queensland, Australia).\",\"authors\":\"Maggie-Anne Harvey, Katherine Pinto Irish, Hugh H Harris, Peter D Erskine, Antony van der Ent\",\"doi\":\"10.1093/aob/mcae103\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The tropical shrub Coelospermum decipiens (Rubiaceae) is an extreme selenium (Se) hyperaccumulator, reported to accumulate up to 1140 µg Se g-1 when found growing on soils with Se <LOD (i.e., <0.01 mg Se kg-1) leading to a bioconcentration factor of more than 100,000. Coelospermum decipiens plants were sampled from different populations in far north Queensland and analysed for Se concentrations. Plant material was subjected to Synchrotron X-ray Fluorescence Microscopy (XFM) and Synchrotron X-ray Absorption Spectroscopy (XAS) investigations to gain insights into elemental distribution and chemical speciation of Se. The results show that the foliar Se concentrations ranged from 100-1000 µg Se g-1, except for the seeds, which had up to 28,000 µg Se g-1. The soils from the Hope Vale area were locally Se-enriched up to 48 mg Se kg-1, but there was no relationship between soil and plant Se concentrations. Synchrotron XFM analysis revealed that Se was localised in the blade margin tissue of the younger leaves, whilst the XAS analysis determined that Se occurs as an organo-Se compound. We report the occurrence of seleniferous soils in the Cape York Peninsula soils for the first time, which may partly explain the evolution of Se hyperaccumulation in C. decipiens. The extremely high concentrations of Se in the seeds is suggestive of an herbivory protection function. The capacity for this species to accumulate and hyperaccumulate Se from non-seleniferous soils is akin to other 'seed' based accumulators, such as some members of the Lecythidaceae family.</p>\",\"PeriodicalId\":8023,\"journal\":{\"name\":\"Annals of botany\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.6000,\"publicationDate\":\"2024-06-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Annals of botany\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1093/aob/mcae103\",\"RegionNum\":2,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"PLANT SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annals of botany","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1093/aob/mcae103","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
摘要
热带灌木 Coelospermum decipiens（茜草科）是一种极端的硒（Se）高积累植物，据报道，当它生长在含 Se 的土壤中时，可积累高达 1140 µg Se g-1 的硒。
The curious case of selenium hyperaccumulation in Coelospermum decipiens from the Cape York Peninsula (Queensland, Australia).
The tropical shrub Coelospermum decipiens (Rubiaceae) is an extreme selenium (Se) hyperaccumulator, reported to accumulate up to 1140 µg Se g-1 when found growing on soils with Se
期刊介绍：
Annals of Botany is an international plant science journal publishing novel and rigorous research in all areas of plant science. It is published monthly in both electronic and printed forms with at least two extra issues each year that focus on a particular theme in plant biology. The Journal is managed by the Annals of Botany Company, a not-for-profit educational charity established to promote plant science worldwide.
The Journal publishes original research papers, invited and submitted review articles, ''Research in Context'' expanding on original work, ''Botanical Briefings'' as short overviews of important topics, and ''Viewpoints'' giving opinions. All papers in each issue are summarized briefly in Content Snapshots , there are topical news items in the Plant Cuttings section and Book Reviews . A rigorous review process ensures that readers are exposed to genuine and novel advances across a wide spectrum of botanical knowledge. All papers aim to advance knowledge and make a difference to our understanding of plant science.
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