Systemic regulation of photosynthetic function in maize plants at graining stage under a vertically heterogeneous light environment

doi:10.1016/S2095-3119(20)63440-2

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	Systemic regulation of photosynthetic function in maize plants at graining stage under a vertically heterogeneous light environment
	Wu Han-yu ; Qiao Mei-yu ; Zhang Wang-feng ; Wang Ke-ru ; Li Shao-kun ; Jiang Chuang-dao
刊名	JOURNAL OF INTEGRATIVE AGRICULTURE
	2022
卷号	21 期号:3 页码:666-676
关键词	light environment photosynthesis gas exchange chlorophyll a fluorescence transient reproductive growth
ISSN号	2095-3119
DOI	10.1016/S2095-3119(20)63440-2
文献子类	Article
英文摘要	To cope with a highly heterogeneous light environment, photosynthesis in plants can be regulated systemically. Currently, the majority of studies are carried out with various plants during the vegetative growth period. As the reproductive sink improves photosynthesis, we wondered how photosynthesis is systemically regulated at the reproductive stage under a vertically heterogeneous light environment in the field. Therefore, changes of light intensity within canopy, chlorophyll content, gas exchange, and chlorophyll a fluorescence transient were carefully investigated at the graining stage of maize under various planting densities. In this study, a high planting density of maize drastically reduced the light intensities in the lower canopy, and increased the difference in vertical light distribution within the canopy. With the increase of vertical heterogeneity, chlorophyll content, light-saturated photosynthetic rate and the quantum yield of electron transport in the ear leaf (EL) and the fourth leaf below the ear (FLBE) were decreased gradually, and the ranges of declines in these parameters were larger at FLBE than those at EL. Leaves in the lower canopy were shaded artificially to further test these results. Partial shading (PS) resulted in a vertically heterogeneous light environment and enhanced the differences in photosynthetic characteristics between EL and FLBE. Removing the tassel and top leaves (RTL) not only improved the vertical light distribution within the canopy, but also reduced the differences in photosynthetic characteristics between the two leaves. Taken together, these results demonstrated that maize plants could enhance the vertical heterogeneity of their photosynthetic function to adapt to their light environment; slight changes of the photosynthetic function in EL at the graining stage under a vertically heterogeneous light environment indicated that the systemic regulation of photosynthesis is weak at the graining stage.
学科主题	Agriculture, Multidisciplinary
出版地	OXFORD
WOS关键词	HYDROGEN-PEROXIDE ; SHADE ; DENSITY ; EFFICIENCY ; INTENSITY ; TOLERANCE ; RUBISCO ; CANOPY ; LEAVES
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000752481800007
资助机构	National Natural Science Foundation of China [31571576] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDA26040103]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/28645]
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.Qiao Mei-yu 3.Chinese Acad Sci, Inst Bot, Key Lab Plant Resources, Beijing 100093, Peoples R China 4.Chinese Acad Agr Sci, Inst Crop Sci, Key Lab Crop Physiol & Ecol, Minist Agr & Rural Affairs, Beijing 100081, Peoples R China 5.Shihezi Univ, Xinjiang Prod & Construct Corps Coll Agron, Key Lab Oasis Ecoagr, Shihezi 832003, Peoples R China 6.[Wang Ke-ru
推荐引用方式 GB/T 7714	Wu Han-yu,Qiao Mei-yu,Zhang Wang-feng,et al. Systemic regulation of photosynthetic function in maize plants at graining stage under a vertically heterogeneous light environment[J]. JOURNAL OF INTEGRATIVE AGRICULTURE,2022,21(3):666-676.
APA	Wu Han-yu,Qiao Mei-yu,Zhang Wang-feng,Wang Ke-ru,Li Shao-kun,&Jiang Chuang-dao.(2022).Systemic regulation of photosynthetic function in maize plants at graining stage under a vertically heterogeneous light environment.JOURNAL OF INTEGRATIVE AGRICULTURE,21(3),666-676.
MLA	Wu Han-yu,et al."Systemic regulation of photosynthetic function in maize plants at graining stage under a vertically heterogeneous light environment".JOURNAL OF INTEGRATIVE AGRICULTURE 21.3(2022):666-676.