Enhanced thermal dissipation confers photoprotection in top leaves despite systemic regulation from lower leaves in cotton

doi:10.1111/jac.12480

	Enhanced thermal dissipation confers photoprotection in top leaves despite systemic regulation from lower leaves in cotton
	Meng, Haofeng ; Yi, Xiaoping 1; Jiang, Chuangdao 2; Zhang, Wangfeng ; Chow, Wah Soon 3; Zhang, Yali
	2021
发表期刊	JOURNAL OF AGRONOMY AND CROP SCIENCE
ISSN	0931-2250
卷号	207 期号:3 页码:557-564
摘要	To better understand the photosynthetic regulation between lower leaves and top leaves, leaf gas exchange and chlorophyll fluorescence were examined in field and climate chamber grown cotton (Gossypium hirsutum L. cv. Xinluzao 45). Two planting density treatments were used in the field: low planting density (LD) and high planting density (HD), and two artificial shade treatments were used in the climate chamber: no shade (NS) and lower leaves shaded (LS). Our results show that the maximum net photosynthetic rate (P-max), light saturation point (LSP) and light compensation point (LCP) of top leaves were decreased, but the apparent quantum efficiency of net carbon assimilation (AQE) of top leaves was increased in HD and LS, which had a similar trend to the lower leaves. Although top and lower leaves improved the utilization of light, the fractions of light absorbed by the PSII antenna that is utilized in PSII photochemistry Y(II) and photochemical quenching coefficient (qP) of top leaves and lower leaves were decreased in HD and LS. Furthermore, the fraction of absorbed light that is dissipated thermally via Delta pH and xanthophylls regulated processes Y(NPQ) and non-photochemical quenching (NPQ) of top leaves were increased in HD and LS. In summary, these results suggest that the light energy utilization and photochemical efficiency of the top leaves in cotton are regulated by the light environment of the lower leaves, and the activation of thermal dissipation confers photoprotection of top leaves despite systemic regulation from lower leaves in cotton. Therefore, considering that cotton is cultivated in high density in most cotton areas of the world, the systemic regulation of photosynthetic capacity in top leaves affected by light environment of lower leaves caused by high-density cultivation needs to be considered comprehensively in practical production. Then, the optimal photosynthetic capacity of the population can be obtained.
关键词	cotton light energy utilization photoprotection systemic regulation thermal dissipation
学科领域	Agronomy
DOI	10.1111/jac.12480
收录类别	SCI
语种	英语
WOS关键词	TRIFOLIATE LEAVES ; LIGHT ; PHOTOSYNTHESIS ; CHLOROPLASTS ; INVOLVEMENT ; DENSITY
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000625222700001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1439-037X
资助机构	National Natural Science Foundation of China [U1803234, 31860355] ; Shihezi University [CXRC201701]
作者邮箱	zhangyali_cn@foxmail.com
引用统计	被引频次：3[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/2S10CLM1/26470
专题	中科院北方资源植物重点实验室
作者单位	1.Shihezi Univ, Xinjiang Prod & Construct Grp, Key Lab Oasis Ecoagr, Shihezi 832003, Peoples R China 2.Southwest Univ, Coll Agron & Biotechnol, Chongqing, Peoples R China 3.Chinese Acad Sci, Inst Bot, Beijing, Peoples R China 4.Australian Natl Univ, Coll Sci, Res Sch Biol, Div Plant Sci, Acton, ACT, Australia
推荐引用方式 GB/T 7714	Meng, Haofeng,Yi, Xiaoping,Jiang, Chuangdao,et al. Enhanced thermal dissipation confers photoprotection in top leaves despite systemic regulation from lower leaves in cotton[J]. JOURNAL OF AGRONOMY AND CROP SCIENCE,2021,207(3):557-564.
APA	Meng, Haofeng,Yi, Xiaoping,Jiang, Chuangdao,Zhang, Wangfeng,Chow, Wah Soon,&Zhang, Yali.(2021).Enhanced thermal dissipation confers photoprotection in top leaves despite systemic regulation from lower leaves in cotton.JOURNAL OF AGRONOMY AND CROP SCIENCE,207(3),557-564.
MLA	Meng, Haofeng,et al."Enhanced thermal dissipation confers photoprotection in top leaves despite systemic regulation from lower leaves in cotton".JOURNAL OF AGRONOMY AND CROP SCIENCE 207.3(2021):557-564.

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