Photosynthetic capacity of the capsule wall and its contribution to carbon fixation and seed yield in castor (Ricinus communis L.)

doi:10.1007/s11738-016-2263-y

	Photosynthetic capacity of the capsule wall and its contribution to carbon fixation and seed yield in castor (Ricinus communis L.)
	Zhang, Yang 1,4; Mulpuri, Sujatha 3; Liu, Aizhong2
	2016-10-01
发表期刊	ACTA PHYSIOLOGIAE PLANTARUM
卷号	38 期号:10 页码:245
摘要	Defoliation occurs in castor due to several reasons, but the crop has propensity to compensate for the seed yield. Photosynthetic efficiency in terms of functional (gas exchange and chlorophyll fluorescence) and structural characteristics (photosynthetic pigment profiles and anatomical properties) of castor capsule walls under light- and dark-adapted conditions was compared with that of leaves. Capsule wall showed high intrinsic efficiency of photosystem II (F-v/F-m, 0.82) which was comparable to leaves (F-v/F-m, 0.80). With increasing photon flux densities (PFD), actual quantum yields and photochemical quenching coefficients of the capsule walls were similar to that in leaves, while electron transport rates reached a maximum corresponding to about 118 % of the leaves. However, maximum net photosynthetic rate of the capsule walls (2.60 mu mol CO2 m(-2) s(-1)) was less than one-fourth of the leaves (15.67 mu mol CO2 m(-2) s(-1)) at the CO2 concentration of 400 mu mol mol(-1), and the difference was attributed to about 80 % lower stomatal density and the 75 % lower total chlorophyll content of capsule walls than the leaves. Furthermore, seed weight in dark-adapted capsules was 2.70-12.42 % less as compared to the capsules developed under light. The results indicate that castor capsule walls are photosynthetically active (about 15-30 % of the leaves) and contribute significantly to carbon fixation and seed yield accounting for 10 % photoassimilates towards seed weight.
关键词	Carbon Fixation Castor Chlorophyll Fluorescence Gas Exchange Photoassimilates Photosynthesis
DOI	10.1007/s11738-016-2263-y
收录类别	SCI
语种	英语
WOS记录号	WOS:000385147300014
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/33541
专题	资源植物与生物技术所级重点实验室
作者单位	1.Jiangxi Acad Agr Sci, Key Lab Oil Crops, Inst Crops, Nanchang 330200, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, 132 Lanhei Rd, Kunming 650204, Peoples R China 3.ICAR Indian Inst Oilseeds Res, Hyderabad 500030, Andhra Pradesh, India 4.Minist Agr, Key Lab Crop Physiol Ecol & Farming Syst Middle &, Nanchang 330200, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yang,Mulpuri, Sujatha,Liu, Aizhong. Photosynthetic capacity of the capsule wall and its contribution to carbon fixation and seed yield in castor (Ricinus communis L.)[J]. ACTA PHYSIOLOGIAE PLANTARUM,2016,38(10):245.
APA	Zhang, Yang,Mulpuri, Sujatha,&Liu, Aizhong.(2016).Photosynthetic capacity of the capsule wall and its contribution to carbon fixation and seed yield in castor (Ricinus communis L.).ACTA PHYSIOLOGIAE PLANTARUM,38(10),245.
MLA	Zhang, Yang,et al."Photosynthetic capacity of the capsule wall and its contribution to carbon fixation and seed yield in castor (Ricinus communis L.)".ACTA PHYSIOLOGIAE PLANTARUM 38.10(2016):245.

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