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Growth-stage dependent changes of leaf chlorophyll content as a proxy for photosynthetic capacity in maize

文献类型：期刊论文

作者Wang, Wenjing5; Chen, Bin3,4; Qi, Tao2; Hao, Lihua1; Fu, Taimiao2; Zhang, Jiarui1; Li, Yue5
刊名FRONTIERS IN PLANT SCIENCE
出版日期2026-03-19
卷号17页码:1758994
关键词flowering stage leaf nitrogen content leaf photosynthetic capacity leaf photosynthetic pigments maize
ISSN号1664-462X
DOI10.3389/fpls.2026.1758994
产权排序2
文献子类Article
英文摘要Accurately quantifying leaf photosynthetic capacity and its seasonal dynamics is critical for simulating gross primary productivity of farmland ecosystems. Previous studies found that leaf chlorophyll (Chl) content was a better proxy for leaf photosynthetic capacity than leaf nitrogen (N) content for C3 crops. However, the relationships of leaf photosynthetic capacity with leaf Chl and N contents for C4 crops (i.e. maize) remain unclear. To address this question, we measured leaf N, Chl, carotenoid (Car) contents, and leaf photosynthetic capacity quantified by the maximum PEP carboxylation rate (Vpmax), maximum carboxylation rate (Vcmax) and maximum electron transport rate (Jmax) weekly for a summer maize cropland in North China from the tillering stage to maturity. The results revealed that leaf photosynthetic capacity and leaf biochemistry parameters exhibited distinct dynamic patterns, increasing during vegetative stages and declining during reproductive growth. The relationships between photosynthetic capacity and biochemical variables (i.e., leaf N, Chl, Car contents) differed pre- and post-flowering. The strongest correlation was observed between the maximum carboxylation rate at 25 degrees C (Vcmax25) and leaf Chl content by area (Chlarea) (R2 = 0.81) before flowering, followed by N content by area (Narea) and Car content by area (Cararea) (R2 = 0.78 and 0.62, respectively). The explanatory power of Chlarea, Narea, and Cararea for Vcmax25 declined to varying degrees after flowering (R2 = 0.74, 0.50, and 0.52, respectively). The Variable Influence on the Projection (VIP) scores and loading analyses also showed that the relationship between Vcmax25 and biochemical variables exhibited growth-stage dependency. Multiple linear regression analysis revealed that the combination of leaf Narea, Chlarea, and Cararea had higher accuracy in estimating Vcmax25 (pre-flowering: R2 = 0.94, RMSE = 1.50 mu mol & centerdot;m-2 & centerdot;s-1; post-flowering: R2 = 0.78, RMSE = 4.44 mu mol & centerdot;m-2 & centerdot;s-1) than individual leaf traits. However, the estimation accuracy of Vcmax25 based on leaf Narea, Chlarea, and Cararea showed R2 value only 0.13 (pre-flowering) and 0.04 (post-flowering) higher than that of leaf Chlarea alone. These findings imply that integrating leaf Chl with growth stage information could enhance the estimation of leaf photosynthetic capacity in C4 crops.
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WOS关键词NITROGEN-USE EFFICIENCY ; ELECTRON-TRANSPORT ; CO2 ASSIMILATION ; PHOTOSYSTEM-I ; PLANT ; LEAVES ; CARBON ; MODEL ; C-3 ; RICE
WOS研究方向Plant Sciences
语种英语
WOS记录号WOS:001731406000001
出版者FRONTIERS MEDIA SA
源URL[http://ir.igsnrr.ac.cn/handle/311030/221502]  
专题生态系统网络观测与模拟院重点实验室_外文论文
通讯作者Li, Yue
作者单位1.Hebei Univ Engn, Sch Water Conservancy & Hydropower, Handan, Peoples R China
2.Hebei Univ Engn, Sch Landscape & Ecol Engn, Handan, Peoples R China;
3.Natl Ecosyst Sci Data Ctr, Beijing, Peoples R China;
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China;
5.Hebei Univ Engn, Sch Earth Sci & Engn, Handan, Peoples R China;
推荐引用方式
GB/T 7714		 Wang, Wenjing,Chen, Bin,Qi, Tao,et al. Growth-stage dependent changes of leaf chlorophyll content as a proxy for photosynthetic capacity in maize[J]. FRONTIERS IN PLANT SCIENCE,2026,17:1758994.
APA Wang, Wenjing.,Chen, Bin.,Qi, Tao.,Hao, Lihua.,Fu, Taimiao.,...&Li, Yue.(2026).Growth-stage dependent changes of leaf chlorophyll content as a proxy for photosynthetic capacity in maize.FRONTIERS IN PLANT SCIENCE,17,1758994.
MLA Wang, Wenjing,et al."Growth-stage dependent changes of leaf chlorophyll content as a proxy for photosynthetic capacity in maize".FRONTIERS IN PLANT SCIENCE 17(2026):1758994.

入库方式： OAI收割

来源：地理科学与资源研究所

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