Using seed-free plants to link diversity in stomatal function with ecological strategy

利用无籽植物将气孔功能的多样性与生态策略联系起来

基本信息

批准号：
2140119
负责人：
Scott McAdam
金额：
$ 90.95万
依托单位：
Purdue University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2022
资助国家：
美国
起止时间：
2022-02-01 至 2025-01-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2140119&HistoricalAwards=false
关键词：
Using seed free plants link

项目摘要

Plants obtain carbon dioxide from the atmosphere through microscopic pores on the leaves called stomata. When stomata open to obtain carbon dioxide, water is lost to the atmosphere by evaporation. Due to the tradeoff between carbon gain used for plant growth and water loss that might lead to dehydration, there are many signals from the environment and plant that trigger stomatal opening and closing. This award aims to investigate whether there is variation across fern species in the responses of stomata to environmental conditions, and whether this variation can be linked to ecological strategies and habitat preference. This project will focus on ferns and lycophytes, ancient groups of plants that have comparatively simple stomatal behavior, in which variation in stomatal function is likely to have a large impact on plant growth and survival. The results will increase understanding of how stomatal responses to the environment evolved and how they could be manipulated in agricultural species to improve plant water use and productivity. This project will also inform the public and students on the dynamic nature of plants, to help raise awareness of how responsive and alive these otherwise static features of the landscape are, as well as provide research training to undergraduate students. This project will investigate three key hypotheses using comparative studies to characterize the natural diversity of stomatal function found in seed-free plants. The first hypothesis proposes that eliminating the threat of water limitation on survival through the evolution of an aquatic growth habit or vegetative desiccation-tolerance, drives the evolution of novel stomatal function, particularly in the regulation of stomatal closure. The second proposes that the evolution of unique leaf hydraulic properties facilitates the evolution of novel stomatal regulation. Finally, this project will test whether there is coordinated evolution in stomatal regulation, leaf hydraulic traits and ecological strategy across an ecological diverse fern family. This project will draw upon a large living collection of diverse fern and lycophyte species and field experiments to address these hypotheses, primarily through comparative studies of stomatal and plant hydraulic physiology between closely related yet ecologically dissimilar species.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

植物通过大气中的微观孔在称为气孔的叶子上从大气中获得二氧化碳。当气孔打开以获取二氧化碳时，蒸发会流失在大气中。由于用于植物生长和水分流失的碳增长之间的权衡，可能导致脱水，因此有许多来自环境和植物的信号引发了气孔开口和关闭。该奖项旨在调查蕨类物种对气孔对环境条件的反应中是否存在差异，以及这种差异是否可以与生态策略和栖息地偏好相关。该项目将集中于蕨类植物和乳木菌，这是具有相对简单的气孔行为的古老植物群，其中气孔功能的变化可能会对植物的生长和生存产生巨大影响。结果将增加对气孔对环境的反应的理解，以及如何在农业物种中操纵它们，以提高植物用水和生产力。该项目还将告知公众和学生植物的动态性质，以帮助提高人们对景观的这些原本静态特征的反应和活着的认识，并为本科生提供研究培训。该项目将使用比较研究研究三个关键假设，以表征无种子植物中发现的气孔功能的自然多样性。第一个假设提出，通过水生生长习惯或营养性耐耐受性的进化来消除水限制对生存的威胁，驱动了新型气孔功能的演变，尤其是在调节气孔闭合方面。第二个提出，独特的叶子液压特性的演变促进了新型气孔调节的演变。最后，该项目将测试在生态多样的蕨类植物中，气孔调节，叶子液压性状和生态策略中是否存在协调的演变。 This project will draw upon a large living collection of diverse fern and lycophyte species and field experiments to address these hypotheses, primarily through comparative studies of stomatal and plant hydraulic physiology between closely related yet ecologically dissimilar species.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.