Salt tolerance in a neotropical orchid in the absence of local adaptation to salt spray

IF 2.4 2区 生物学 Q2 PLANT SCIENCES
Thales M. de Lima, Simone F. Silva, Rafael V. Ribeiro, Julia Sánchez-Vilas, Fabio Pinheiro
{"title":"Salt tolerance in a neotropical orchid in the absence of local adaptation to salt spray","authors":"Thales M. de Lima,&nbsp;Simone F. Silva,&nbsp;Rafael V. Ribeiro,&nbsp;Julia Sánchez-Vilas,&nbsp;Fabio Pinheiro","doi":"10.1002/ajb2.16373","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Premise</h3>\n \n <p>Salt tolerance has rarely been investigated regionally in the neotropics and even more rarely in Orchidaceae, one of the largest families. Therefore, investigating local adaptation to salt spray and its physiological basis in <i>Epidendrum fulgens</i>, a neotropical orchid species, brings important new insights.</p>\n </section>\n \n <section>\n \n <h3> Methods</h3>\n \n <p>We assessed the degree of salt tolerance in <i>E. fulgens</i> by testing whether coastal populations are more tolerant to salt, which could point to local adaptation. To understand the physiological basis of such salt tolerance, we exposed wild-collected individuals to salt spray for 60 days, then measured leaf expansion, osmotic potential, sodium leaf concentration, chlorophyll leaf index, chlorophyll fluorescence, relative growth rate, and pressure–volume curves.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>There is no local adaptation to salt spray since both inland and coastal plants have a high tolerance to salt stress. This tolerance is explained by the ability to tolerate high concentrations of salt in leaf tissues, which is related to the high succulence displayed by this species.</p>\n </section>\n \n <section>\n \n <h3> Conclusions</h3>\n \n <p>We showed an unprecedented salt tolerance level for an orchid species, highlighting our limited knowledge of that trait beyond the traditional studied groups. Another interesting finding is that salt tolerance in <i>E. fulgens</i> is linked to succulence, is widespread, and is not the result of local adaptation. We suggest that <i>E. fulgens</i> and its allied species could be an interesting group to explore the evolution of important traits related to tolerance to salt stress, like succulence.</p>\n </section>\n </div>","PeriodicalId":7691,"journal":{"name":"American Journal of Botany","volume":null,"pages":null},"PeriodicalIF":2.4000,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"American Journal of Botany","FirstCategoryId":"99","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ajb2.16373","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0

Abstract

Premise

Salt tolerance has rarely been investigated regionally in the neotropics and even more rarely in Orchidaceae, one of the largest families. Therefore, investigating local adaptation to salt spray and its physiological basis in Epidendrum fulgens, a neotropical orchid species, brings important new insights.

Methods

We assessed the degree of salt tolerance in E. fulgens by testing whether coastal populations are more tolerant to salt, which could point to local adaptation. To understand the physiological basis of such salt tolerance, we exposed wild-collected individuals to salt spray for 60 days, then measured leaf expansion, osmotic potential, sodium leaf concentration, chlorophyll leaf index, chlorophyll fluorescence, relative growth rate, and pressure–volume curves.

Results

There is no local adaptation to salt spray since both inland and coastal plants have a high tolerance to salt stress. This tolerance is explained by the ability to tolerate high concentrations of salt in leaf tissues, which is related to the high succulence displayed by this species.

Conclusions

We showed an unprecedented salt tolerance level for an orchid species, highlighting our limited knowledge of that trait beyond the traditional studied groups. Another interesting finding is that salt tolerance in E. fulgens is linked to succulence, is widespread, and is not the result of local adaptation. We suggest that E. fulgens and its allied species could be an interesting group to explore the evolution of important traits related to tolerance to salt stress, like succulence.

一种新热带兰花在当地不适应盐雾的情况下的耐盐性。
前言:在新热带地区很少对耐盐性进行区域性研究,在兰科(兰属植物中最大的科之一)更是如此。因此,研究新热带兰科植物富贵竹(Epidendrum fulgens)对盐雾的局部适应性及其生理基础将带来重要的新发现:方法:我们通过测试沿海种群是否更耐盐碱来评估富贵竹的耐盐碱程度。为了了解这种耐盐性的生理基础,我们将野生采集的个体暴露在盐雾中 60 天,然后测量叶片扩展、渗透电位、钠叶浓度、叶绿素叶指数、叶绿素荧光、相对生长率和压力-体积曲线:结果:由于内陆和沿海植物对盐胁迫都有很强的耐受性,因此当地对盐雾没有适应性。这种耐受性的原因是叶片组织能够耐受高浓度的盐分,这与该物种表现出的高肉质性有关:结论:我们发现兰花物种具有前所未有的耐盐性,这凸显了我们在传统研究群体之外对这一特性的有限了解。另一个有趣的发现是,富贵草的耐盐性与多汁性有关,而且分布广泛,并非当地适应的结果。我们认为,富贵草及其同属物种可能是一个有趣的群体,可用于探索与耐盐胁迫相关的重要性状(如多汁性)的进化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
American Journal of Botany
American Journal of Botany 生物-植物科学
CiteScore
4.90
自引率
6.70%
发文量
171
审稿时长
3 months
期刊介绍: The American Journal of Botany (AJB), the flagship journal of the Botanical Society of America (BSA), publishes peer-reviewed, innovative, significant research of interest to a wide audience of plant scientists in all areas of plant biology (structure, function, development, diversity, genetics, evolution, systematics), all levels of organization (molecular to ecosystem), and all plant groups and allied organisms (cyanobacteria, algae, fungi, and lichens). AJB requires authors to frame their research questions and discuss their results in terms of major questions of plant biology. In general, papers that are too narrowly focused, purely descriptive, natural history, broad surveys, or that contain only preliminary data will not be considered.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信