Photosynthetic acclimation during low-light-induced leaf senescence in post-anthesis maize plants

doi:10.1007/s11120-021-00851-1

	Photosynthetic acclimation during low-light-induced leaf senescence in post-anthesis maize plants
	Wu, Han-Yu ; Liu, Li-An ; Shi, Lei; Zhang, Wang-Feng ; Jiang, Chuang-Dao
	2021
发表期刊	PHOTOSYNTHESIS RESEARCH
ISSN	0166-8595
卷号	150 期号:1-3 页码:313-326
摘要	Low light conditions not only induce leaf senescence, but also photosynthetic acclimation. This study aimed to determine whether plants exhibit photosynthetic acclimation during low-light-induced leaf senescence. The influences of shading on leaf senescence and photosynthetic acclimation were explored in post-anthesis maize plants. The results showed that whole shading (WS) of maize plants accelerated leaf senescence, whereas partial shading (PS) slowed leaf senescence. WS led to larger decreases in the photosynthetic rate (P-n) and stomatal conductance (G(s)) compared to those of the PS treatment. Interestingly, chlorophyll a fluorescence (ChlF) demonstrated that the absorption flux (ABS/CSo) and trapped energy flux (TRo/CSo) per cross section in leaves remained relatively stable under WS, whereas significant decreases in the active PSII reaction centers (RC/CSo) resulted in considerable increases in absorption (ABS/RC) and trapped energy flux (TRo/RC) per reaction center. ABS/CSo, TRo/CSo, ABS/RC, and TRo/RC increased markedly under PS, whereas there were slight decreases in RC/CSo and electron transport activity. These results suggest that the PS treatment resulted in obvious improvements in the absorption and capture of light energy in shaded leaves. Further analysis demonstrated that both the WS and PS treatments resulted in a greater decrease in the activity of Rubisco compared to that of phosphoenolpyruvate carboxylase (PEPC). Moreover, PEPC activity in PS was maintained at a high level. Consequently, the current study proposed that the improvement of the absorption and capture of light energy and the maintenance of PEPC activity of mesophyll cells were due to photosynthetic acclimation of low-light-induced leaf senescence in maize plants. In addition, the rate of senescence of vascular bundle cells in maize leaves exceeded that of mesophyll cells under low light, showing obvious tissue specificity.
关键词	Low light Senescence Acclimation Photosynthesis Reproductive growth period
学科领域	Plant Sciences
DOI	10.1007/s11120-021-00851-1
收录类别	SCI
语种	英语
WOS关键词	CHLOROPHYLL-A FLUORESCENCE ; DARK-INDUCED SENESCENCE ; SPINACH LEAVES ; STRESS ; DEGRADATION ; PHYTOCHROME ; TEMPERATURE ; TOLERANCE ; GRADIENTS ; GROWTH
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000658073400001
出版者	SPRINGER
Special Issue	SI
文献子类	Article
出版地	DORDRECHT
EISSN	1573-5079
资助机构	National Natural Science Foundation of China [31571576, 31970350]
作者邮箱	zhwf_agr@shzu.edu.cn ; jcdao@ibcas.ac.cn
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26422
专题	中科院北方资源植物重点实验室
作者单位	1.[Wu, Han-Yu 2.Shihezi Univ, Key Lab Oasis Ecoagr, Xinjiang Prod & Construct Corps, Coll Agron, Shihezi 832003, Peoples R China 3.Liu, Li-An 4.Shi, Lei 5.Chinese Acad Sci, Inst Bot, Key Lab Plant Resources, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Wu, Han-Yu,Liu, Li-An,Shi, Lei,et al. Photosynthetic acclimation during low-light-induced leaf senescence in post-anthesis maize plants[J]. PHOTOSYNTHESIS RESEARCH,2021,150(1-3):313-326.
APA	Wu, Han-Yu,Liu, Li-An,Shi, Lei,Zhang, Wang-Feng,&Jiang, Chuang-Dao.(2021).Photosynthetic acclimation during low-light-induced leaf senescence in post-anthesis maize plants.PHOTOSYNTHESIS RESEARCH,150(1-3),313-326.
MLA	Wu, Han-Yu,et al."Photosynthetic acclimation during low-light-induced leaf senescence in post-anthesis maize plants".PHOTOSYNTHESIS RESEARCH 150.1-3(2021):313-326.

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