CAREER: Improving understanding and prediction of photosynthetic acclimation to global change

职业：提高对光合作用对全球变化的适应的理解和预测

• 批准号: 2045968
• 负责人: Nicholas Smith
• 金额: $ 114.29万
• 依托单位: Texas Tech University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2045968&HistoricalAwards=false
• 关键词: CAREER; Improving; understanding; prediction; photosynthetic

Land plants regulate the largest transfer of carbon dioxide from the atmosphere to the Earth’s surface through the process of photosynthesis. Because carbon dioxide accumulation in the atmosphere is the primary driver of ongoing climate change, it is critical to understand how plants, and photosynthesis in particular, will respond to future conditions as these responses will dictate the rate and magnitude of future climate change. Despite their sensitivity to plant processes, the climate models include simplistic representations of plants. Model representation of plant functioning mirrors student understanding of these processes, as exemplified by the simplistic way in which they are represented in popular press and textbooks. This project will quantify long-term plant responses, including acclimation, to ongoing global change and will use findings from the lab and field to improve climate models. The research program will be integrated with an education program focused on student exploration of the interrelationships between plants and climate change. Hands-on research experiences for students will help to develop the next generation of scientists.This research will use an integrated model-experiment approach to define the mechanisms underlying photosynthetic acclimation responses and their impact on larger ecological processes. First, it will quantify the effect of soil nutrients and nutrient acquisition on photosynthetic acclimation and the resulting impact on whole-plant functioning. This will test the general hypothesis that soil nutrient demand alters photosynthetic trait responses to soil nutrient availability. Second, the project will determine what plants acclimate to and how long acclimation takes. This will address the general hypothesis that less resource conservative species will acclimate faster than more resource conservative species. Third, the project will quantify the impact of photosynthetic acclimation on community- and ecosystem-scale processes. It will test the hypothesis that the response of individual physiology can substantially alter larger ecological processes by testing refined theory in multiple models. The research will be integrated with an education program that will develop two course-based undergraduate research experiences (CUREs). The first will teach non-majors the role of plants as regulators of the global climate using semi-independent research projects. The second CURE will refine a majors-level CURE, providing opportunities for students to participate in the main research funded by this project by developing, carrying out, and disseminating independent spin-off projects. The CUREs will specifically target underrepresented minority students at TTU, a Hispanic Serving Institution, as a means to increase diversity in the fields of plant physiological and global change ecology.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.

陆地植物通过光合作用调节二氧化碳从大气到地球表面的最大转移，因为大气中二氧化碳的积累是持续气候变化的主要驱动因素，因此了解植物，特别是光合作用的机制至关重要。 ，将对未来的条件做出反应，因为这些反应将决定未来气候变化的速度和幅度，尽管气候模型对植物过程很敏感，但其对植物功能的简单表示反映了学生对这些过程的理解，如图所示。经过该项目将量化植物对持续全球变化的长期反应，包括适应，并将利用实验室和实地的研究结果来改进气候模型。与专注于学生探索植物与气候变化之间相互关系的教育计划相结合，学生的实践研究经验将有助于培养下一代科学家。这项研究将使用综合模型实验方法来定义潜在的机制。光合作用的首先，它将量化土壤养分和养分获取对光合适应的影响以及由此对整个植物功能的影响，这将检验土壤养分需求改变光合性状反应的一般假设。其次，该项目将确定植物适应什么以及适应需要多长时间，这将解决资源保守性较低的物种比资源保守性较高的物种适应速度更快的普遍假设。它将通过在多个模型中测试完善的理论来检验个体生理反应可以显着改变更大的生态过程的假设。两个基于课程的本科研究经验（CURE），第一个将利用半独立的研究项目向非专业人士传授植物作为全球气候调节剂的作用，第二个CURE将完善专业水平的CURE，为学生提供机会。参加该项目通过开发、实施和传播独立的衍生项目资助的主要研究将专门针对西班牙裔服务机构 TTU 中代表性不足的少数族裔学生，作为增加植物生理学和植物学领域多样性的一种手段。全球变化生态学。这反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

A Model of C 4 Photosynthetic Acclimation Based on Least‐Cost Optimality Theory Suitable for Earth System Model Incorporation

基于最小成本最优理论的适合地球系统模型结合的C 4 光合驯化模型

• DOI: 10.1029/2021ms002470
• 发表时间: 2022-03
• 期刊: Journal of Advances in Modeling Earth Systems
• 影响因子: 6.8
• 作者: Scott, Helen G.;Smith, Nicholas G.
• 通讯作者: Smith, Nicholas G.

Environmental heterogeneity modulates the effect of plant diversity on the spatial variability of grassland biomass

环境异质性调节植物多样性对草地生物量空间变异的影响

• DOI: 10.1038/s41467-023-37395-y
• 发表时间: 2023-03-31
• 期刊: Nature Communications
• 影响因子: 16.6
• 作者: Daleo, Pedro;Alberti, Juan;Chaneton, Enrique J.;Iribarne, Oscar;Tognetti, Pedro M.;Bakker, Jonathan D.;Borer, Elizabeth T.;Bruschetti, Martin;MacDougall, Andrew S.;Pascual, Jesus;Sankaran, Mahesh;Seabloom, Eric W.;Wang, Shaopeng;Bagchi, Sumanta;Brudvig, Lars A.;Catford, Jane A.;Dickman, Chris R.;Dickson, Timothy L.;Donohue, Ian;Eisenhauer, Nico;Gruner, Daniel S.;Haider, Sylvia;Jentsch, Anke;Knops, Johannes M. H.;Lekberg, Ylva;McCulley, Rebecca L.;Moore, Joslin L.;Mortensen, Brent;Ohlert, Timothy;Partel, Meelis;Peri, Pablo L.;Power, Sally A.;Risch, Anita C.;Rocca, Camila;Smith, Nicholas G.;Stevens, Carly;Tamme, Riin;Veen, G. F. (Ciska);Wilfahrt, Peter A.;Hautier, Yann
• 通讯作者: Hautier, Yann

Soil nitrogen fertilization reduces relative leaf nitrogen allocation to photosynthesis

土壤氮肥减少了叶向光合作用的相对氮分配

• DOI: 10.1093/jxb/erad195
• 发表时间: 2023-05
• 期刊: Journal of Experimental Botany
• 影响因子: 6.9
• 作者: Waring, Elizabeth F.;Perkowski, Evan A.;Smith, Nicholas G.;Rogers, ed., Alistair
• 通讯作者: Rogers, ed., Alistair

Global patterns and drivers of leaf photosynthetic capacity: The relative importance of environmental factors and evolutionary history

叶子光合能力的全球模式和驱动因素：环境因素和进化历史的相对重要性

• DOI: 10.1111/geb.13660
• 发表时间: 2023-05
• 期刊: Global Ecology and Biogeography
• 影响因子: 6.4
• 作者: Yan, Zhengbing;Sardans, Jordi;Peñuelas, Josep;Detto, Matteo;Smith, Nicholas G.;Wang, Han;Guo, Lulu;Hughes, Alice C.;Guo, Zhengfei;Lee, Calvin K.;et al
• 通讯作者: et al

Rising CO 2 and warming reduce global canopy demand for nitrogen

CO 2 上升和气候变暖减少了全球树冠对氮的需求

• DOI: 10.1111/nph.18076
• 发表时间: 2022-09
• 期刊: New Phytologist
• 影响因子: 9.4
• 作者: Dong, Ning;Wright, Ian J.;Chen, Jing M.;Luo, Xiangzhong;Wang, Han;Keenan, Trevor F.;Smith, Nicholas G.;Prentice, Iain Colin
• 通讯作者: Prentice, Iain Colin