Effect of Stomatal Morphology on Leaf Photosynthetic Induction Under Fluctuating Light in Rice

光合作用 气孔导度 气孔密度 用水效率 生物 光强度 植物 底纹 蒸腾作用 物理 光学 艺术 视觉艺术
作者
Zhuang Xiong,Zhigang Dun,Yucheng Wang,Desheng Yang,Dongliang Xiong,Kehui Cui,Shaobing Peng,Jianliang Huang
出处
期刊:Frontiers in Plant Science [Frontiers Media SA]
卷期号:12 被引量:16
标识
DOI:10.3389/fpls.2021.754790
摘要

Plants are often confronted with light fluctuations from seconds to minutes due to altering sun angles, mutual shading, and clouds under natural conditions, which causes a massive carbon loss and water waste. The effect of stomatal morphology on the response of leaf gas exchange to fluctuating light remains disputable. In this study, we investigated the differences in leaf stomatal morphology and photosynthetic induction across twelve rice genotypes after a stepwise increase in light intensity. A negative correlation was observed between stomatal size and density across rice genotypes. Smaller and denser stomata contributed to a faster stomatal response under fluctuating light. Plants with faster stomatal opening also showed faster photosynthetic induction and higher biomass accumulation but lower intrinsic water use efficiency ( i WUE) under fluctuating light. Moreover, stomatal morphology seemed to have less effect on the initial and final stomatal conductance, and there was a minimal correlation between steady-state and non-steady-state stomatal conductance among different rice genotypes. These results highlight the important role of stomatal morphology in regulating photosynthetic efficiency and plant growth under fluctuating light conditions. To simultaneously enhance leaf i WUE when improving the photosynthetic efficiency under fluctuating light, it may be necessary to take biochemical processes into account in the future.
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