{"title":"小麦叶片经济光谱对多代大气高浓度 CO2 的响应","authors":"","doi":"10.1016/j.envexpbot.2024.105897","DOIUrl":null,"url":null,"abstract":"<div><p>While numerous studies have explored the impacts of elevated atmospheric CO<sub>2</sub> concentration (<em>e</em>[CO<sub>2</sub>]) on leaf traits in plants within a single life cycle, the effects of multigenerational <em>e</em>[CO<sub>2</sub>] on leaf functional traits and their interrelationships remain obscure in major crops. Leaf economics spectrum (LES) comprises a group of leaf traits, which describes trade-offs between the leaf characteristics that reflect carbon economy or returns on the investments of nutrients and dry mass. In this study, the wheat seeds harvested from a 7-generation experiment under the <em>e</em>[CO<sub>2</sub>] (800 μmol L<sup>−1</sup>) or the ambient CO<sub>2</sub> concentration were planted to assess changes in the LES. Our results revealed a consistent increase in mass-normalized leaf nitrogen and phosphorus concentration under the <em>e</em>[CO<sub>2</sub>] over the generations. Photosynthetic phosphorus use efficiency was positively correlated with photosynthetic rate per unit mass, dark respiration per unit mass, photosynthetic rate per unit area, leaf phosphorus per unit area, and dark respiration per unit area. Moreover, we used structural equation model to illustrate the network of relationships among LES traits and shoot dry weight, providing insights into the effects of the multigenerational <em>e</em>[CO<sub>2</sub>] on wheat growth. This study contributes novel perspectives to our understandings of wheat responses to long-term climate change.</p></div>","PeriodicalId":11758,"journal":{"name":"Environmental and Experimental Botany","volume":null,"pages":null},"PeriodicalIF":4.5000,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Leaf economics spectrum of wheat in response to multigenerational atmospheric elevated CO2\",\"authors\":\"\",\"doi\":\"10.1016/j.envexpbot.2024.105897\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>While numerous studies have explored the impacts of elevated atmospheric CO<sub>2</sub> concentration (<em>e</em>[CO<sub>2</sub>]) on leaf traits in plants within a single life cycle, the effects of multigenerational <em>e</em>[CO<sub>2</sub>] on leaf functional traits and their interrelationships remain obscure in major crops. Leaf economics spectrum (LES) comprises a group of leaf traits, which describes trade-offs between the leaf characteristics that reflect carbon economy or returns on the investments of nutrients and dry mass. In this study, the wheat seeds harvested from a 7-generation experiment under the <em>e</em>[CO<sub>2</sub>] (800 μmol L<sup>−1</sup>) or the ambient CO<sub>2</sub> concentration were planted to assess changes in the LES. Our results revealed a consistent increase in mass-normalized leaf nitrogen and phosphorus concentration under the <em>e</em>[CO<sub>2</sub>] over the generations. Photosynthetic phosphorus use efficiency was positively correlated with photosynthetic rate per unit mass, dark respiration per unit mass, photosynthetic rate per unit area, leaf phosphorus per unit area, and dark respiration per unit area. Moreover, we used structural equation model to illustrate the network of relationships among LES traits and shoot dry weight, providing insights into the effects of the multigenerational <em>e</em>[CO<sub>2</sub>] on wheat growth. This study contributes novel perspectives to our understandings of wheat responses to long-term climate change.</p></div>\",\"PeriodicalId\":11758,\"journal\":{\"name\":\"Environmental and Experimental Botany\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.5000,\"publicationDate\":\"2024-07-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental and Experimental Botany\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0098847224002557\",\"RegionNum\":2,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental and Experimental Botany","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0098847224002557","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0
摘要
虽然已有大量研究探讨了大气中二氧化碳浓度(e[CO2])升高对植物单个生命周期中叶片性状的影响,但在主要作物中,多代二氧化碳浓度(e[CO2])对叶片功能性状及其相互关系的影响仍然不明显。叶片经济光谱(LES)由一组叶片性状组成,描述了反映碳经济或养分和干重投资回报的叶片特征之间的权衡。在本研究中,在二氧化碳浓度为 e[CO2](800 μmol L-1)或环境二氧化碳浓度的条件下种植了 7 代实验中收获的小麦种子,以评估 LES 的变化。我们的结果表明,在 e[CO2] 条件下,叶片氮和磷的质量归一化浓度在各代中持续增加。光合磷利用效率与单位质量光合速率、单位质量暗呼吸、单位面积光合速率、单位面积叶磷和单位面积暗呼吸呈正相关。此外,我们还利用结构方程模型说明了LES性状与芽干重之间的关系网络,为了解多代e[CO2]对小麦生长的影响提供了见解。这项研究为我们了解小麦对长期气候变化的响应提供了新的视角。
Leaf economics spectrum of wheat in response to multigenerational atmospheric elevated CO2
While numerous studies have explored the impacts of elevated atmospheric CO2 concentration (e[CO2]) on leaf traits in plants within a single life cycle, the effects of multigenerational e[CO2] on leaf functional traits and their interrelationships remain obscure in major crops. Leaf economics spectrum (LES) comprises a group of leaf traits, which describes trade-offs between the leaf characteristics that reflect carbon economy or returns on the investments of nutrients and dry mass. In this study, the wheat seeds harvested from a 7-generation experiment under the e[CO2] (800 μmol L−1) or the ambient CO2 concentration were planted to assess changes in the LES. Our results revealed a consistent increase in mass-normalized leaf nitrogen and phosphorus concentration under the e[CO2] over the generations. Photosynthetic phosphorus use efficiency was positively correlated with photosynthetic rate per unit mass, dark respiration per unit mass, photosynthetic rate per unit area, leaf phosphorus per unit area, and dark respiration per unit area. Moreover, we used structural equation model to illustrate the network of relationships among LES traits and shoot dry weight, providing insights into the effects of the multigenerational e[CO2] on wheat growth. This study contributes novel perspectives to our understandings of wheat responses to long-term climate change.
期刊介绍:
Environmental and Experimental Botany (EEB) publishes research papers on the physical, chemical, biological, molecular mechanisms and processes involved in the responses of plants to their environment.
In addition to research papers, the journal includes review articles. Submission is in agreement with the Editors-in-Chief.
The Journal also publishes special issues which are built by invited guest editors and are related to the main themes of EEB.
The areas covered by the Journal include:
(1) Responses of plants to heavy metals and pollutants
(2) Plant/water interactions (salinity, drought, flooding)
(3) Responses of plants to radiations ranging from UV-B to infrared
(4) Plant/atmosphere relations (ozone, CO2 , temperature)
(5) Global change impacts on plant ecophysiology
(6) Biotic interactions involving environmental factors.