Systemic regulation of photosynthetic function in field-grown sorghum

doi:10.1016/j.plaphy.2015.05.008

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	Systemic regulation of photosynthetic function in field-grown sorghum
	Li, Tao 2; Liu, Yujun ; Shi, Lei 2; Jiang, Chuangdao 2
刊名	PLANT PHYSIOLOGY AND BIOCHEMISTRY
	2015
卷号	94 页码:86-94
关键词	Sorghum bicolor L. Light intensity Photosynthesis Photoinhibition Chlorophyll a fluorescence
ISSN号	0981-9428
DOI	10.1016/j.plaphy.2015.05.008
文献子类	Article
英文摘要	The photosynthetic characteristics of developing leaves of plants grown under artificial conditions are, to some extent, regulated systemically by mature leaves; however, whether systemic regulation of photosynthesis occurs in field-grown crops is unclear. To explore this question, we investigated the effects of planting density on growth characteristics, gas exchange, leaf nitrogen concentration and chlorophyll a fluorescence in field-grown sorghum (Sorghum bicolor L). Our results showed that close planting resulted in a marked decline in light intensity in lower canopy. Sorghum plants grown at a high planting density had lower net photosynthetic rate (130), stomatal conductance (GO, and transpiration rate (E) than plants grown at a low planting density. Moreover, in the absence of mineral deficiency, close planting induced a slight increase in leaf nitrogen concentration. The decreased photosynthesis in leaves of the lower canopy at high planting density was caused mainly by the low light. However, newly developed leaves exposed to high light in the upper canopy of plants grown at high planting density also exhibited a distinct decline in photosynthesis relative to plants grown at low planting density. Based on these results, the photosynthetic function of the newly developed leaves in the upper canopy was not determined fully by their own high light environment. Accordingly, we suggest that the photosynthetic function of newly developed leaves in the upper canopy of field-grown sorghum plants is regulated systemically by the lower canopy leaves. The differences in systemic regulation of photosynthesis were also discussed between field conditions and artificial conditions. (C) 2015 Elsevier Masson SAS. All rights reserved.
学科主题	Plant Sciences
电子版国际标准刊号	1873-2690
出版地	ISSY-LES-MOULINEAUX
WOS关键词	LEAF NITROGEN ; SHADED SIDE ; LIGHT ; CANOPY ; LEAVES ; DENSITY ; MATURE ; YIELD ; SUN
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
WOS记录号	WOS:000358809100011
资助机构	National Natural Science Foundation of China [30871455] ; Beijing Natural Science Foundation [6122025] ; Chinese of Academy of Sciences [KZCC-EW-103-3]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/25904]
专题	中科院北方资源植物重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, Key Lab Plant Resources, Beijing 100093, Peoples R China 2.Beijing Forestry Univ, Coll Biol Sci & Biotechnol, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Li, Tao,Liu, Yujun,Shi, Lei,et al. Systemic regulation of photosynthetic function in field-grown sorghum[J]. PLANT PHYSIOLOGY AND BIOCHEMISTRY,2015,94:86-94.
APA	Li, Tao,Liu, Yujun,Shi, Lei,&Jiang, Chuangdao.(2015).Systemic regulation of photosynthetic function in field-grown sorghum.PLANT PHYSIOLOGY AND BIOCHEMISTRY,94,86-94.
MLA	Li, Tao,et al."Systemic regulation of photosynthetic function in field-grown sorghum".PLANT PHYSIOLOGY AND BIOCHEMISTRY 94(2015):86-94.