光合作用
C4光合作用
叶绿体
磷酸烯醇式丙酮酸羧化酶
生物
光系统II
新陈代谢
光合效率
光系统I
酶
生物化学
植物
作者
Haichao Zhao,Yu Wang,Ming‐Ju Amy Lyu,Xin‐Guang Zhu
出处
期刊:Plant Physiology
[Oxford University Press]
日期:2022-02-15
卷期号:189 (1): 84-98
被引量:13
标识
DOI:10.1093/plphys/kiac051
摘要
Abstract Compared to the large number of studies focused on the factors controlling C3 photosynthesis efficiency, there are relatively fewer studies of the factors controlling photosynthetic efficiency in C4 leaves. Here, we used a dynamic systems model of C4 photosynthesis based on maize (Zea mays) to identify features associated with high photosynthetic efficiency in NADP-malic enzyme (NADP-ME) type C4 photosynthesis. We found that two additional factors related to coordination between C4 shuttle metabolism and C3 metabolism are required for efficient C4 photosynthesis: (1) accumulating a high concentration of phosphoenolpyruvate through maintaining a large PGA concentration in the mesophyll cell chloroplast and (2) maintaining a suitable oxidized status in bundle sheath cell chloroplasts. These identified mechanisms are in line with the current cellular location of enzymes/proteins involved in the starch synthesis, the Calvin–Benson cycle and photosystem II of NADP-ME type C4 photosynthesis. These findings suggested potential strategies for improving C4 photosynthesis and engineering C4 rice.
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