{"title":"Variations in functional traits and resilience of Inga vera subsp. affinis under flooding and drought conditions","authors":"Rosana Müller Padilha Feitosa, Louizi de Souza Magalhães Braghin, Lindamir Hernandez Pastorini, Mariza Barion Romagnolo","doi":"10.1071/bt22051","DOIUrl":null,"url":null,"abstract":"<strong> Context</strong><p>The dynamics of a plant population are influenced by both biotic and abiotic factors that interfere with the phenotype of the individual, indicating how species develop in the occupied environment. Riparian plant species are subject to environmental fluctuations, such as periodic flooding regimes and severe droughts, which may result from climate change.</p><strong> Aims</strong><p>The aim of this study was to evaluate the morphological growth responses of individuals of <i>Inga vera</i> subsp. <i>affinis</i> (DC.) T.D.Penn. in controlled drought and flooding conditions by observing variations in functional traits using controlled experiments.</p><strong> Methods</strong><p>Individuals were subjected to partial flooding and dry periods, and functional traits, such as leaf area, root height and dry mass, were analysed. The difference between treatments was tested using unifactorial statistical analysis of variance (ANOVA).</p><strong> Key results</strong><p>Fifteen-day-old individuals of <i>Inga vera</i> subsp. <i>affinis</i> kept under flooding conditions showed lower root height and dry mass compared to plants exposed to drought treatment; 50-day-old plants under flooding conditions also presented lower root dry mass than did plants in drought treatment, maintaining the result after the resilience period.</p><strong> Conclusions</strong><p>Root dry mass was the most affected variable in individuals of <i>Inga vera</i> subsp. <i>affinis</i> under flooding conditions, even after the recovery period. In general, plants in the control and drought treatments did not differ significantly considering the analysed variables.</p><strong> Implications</strong><p>Given the current climate change conditions, an increase in the frequency and duration of extreme events, such as floods and droughts, is expected. Thus, understanding how phenotypical traits of species already adapted to flooding conditions behave under water stress and waterlogged conditions for longer periods of time is essential to explain plant responses and predict future survival scenarios for the species.</p>","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":0.9000,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Australian Journal of Botany","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1071/bt22051","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Context
The dynamics of a plant population are influenced by both biotic and abiotic factors that interfere with the phenotype of the individual, indicating how species develop in the occupied environment. Riparian plant species are subject to environmental fluctuations, such as periodic flooding regimes and severe droughts, which may result from climate change.
Aims
The aim of this study was to evaluate the morphological growth responses of individuals of Inga vera subsp. affinis (DC.) T.D.Penn. in controlled drought and flooding conditions by observing variations in functional traits using controlled experiments.
Methods
Individuals were subjected to partial flooding and dry periods, and functional traits, such as leaf area, root height and dry mass, were analysed. The difference between treatments was tested using unifactorial statistical analysis of variance (ANOVA).
Key results
Fifteen-day-old individuals of Inga vera subsp. affinis kept under flooding conditions showed lower root height and dry mass compared to plants exposed to drought treatment; 50-day-old plants under flooding conditions also presented lower root dry mass than did plants in drought treatment, maintaining the result after the resilience period.
Conclusions
Root dry mass was the most affected variable in individuals of Inga vera subsp. affinis under flooding conditions, even after the recovery period. In general, plants in the control and drought treatments did not differ significantly considering the analysed variables.
Implications
Given the current climate change conditions, an increase in the frequency and duration of extreme events, such as floods and droughts, is expected. Thus, understanding how phenotypical traits of species already adapted to flooding conditions behave under water stress and waterlogged conditions for longer periods of time is essential to explain plant responses and predict future survival scenarios for the species.
植物种群的动态受生物和非生物因素的影响，这些因素干扰个体的表型，表明物种如何在占领环境中发育。河岸植物物种易受环境波动的影响，例如可能由气候变化引起的周期性洪水和严重干旱。目的研究印加亚属(Inga vera subsp)个体的形态生长反应。竹(DC)。T.D.Penn。在旱涝控制条件下，通过对照实验观察功能性状的变化。方法采用局部淹水和局部枯水期试验，分析其叶面积、根高、干质量等功能性状。采用单因素方差统计分析(ANOVA)检验处理间的差异。关键结果:印加亚种15日龄个体;与干旱处理相比，淹水处理下的亲缘木耳根高和干质量较低;50日龄淹水处理植株根系干质量也低于干旱处理植株，恢复期后仍保持原状。结论根干质量是印加亚种个体间影响最大的变量。在淹水条件下，甚至在恢复期之后。总体而言，对照和干旱处理的植株在分析变量时差异不显著。考虑到当前的气候变化条件，预计洪水和干旱等极端事件的频率和持续时间将会增加。因此，了解已经适应洪水条件的物种的表型特征如何在水分胁迫和长时间涝渍条件下表现，对于解释植物的反应和预测该物种的未来生存情景至关重要。
期刊介绍：
Australian Journal of Botany is an international journal for publication of original research in plant science. We seek papers of broad interest with relevance to Southern Hemisphere ecosystems. Our scope encompasses all approaches to understanding plant biology.
Australian Journal of Botany is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.
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