Arid
DOI10.1016/S1011-1344(99)00018-4
Ultraviolet-B stimulates grana formation in chloroplasts in the African desert plant Dimorphotheca pluvialis
Yu, SG; Bjorn, LO
通讯作者Yu, SG
来源期刊JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
ISSN1011-1344
出版年1999
卷号49期号:1页码:65-70
英文摘要

Chloroplasts isolated from a plant species, Dimorphotheca pluvialis Moench (Asteraceae), grown under visible light without supplementary UV-B radiation, have poor grana development. The dominant components in the membrane organizations are doublets and triplets of stroma lamellae. However, such chloroplasts possess the capacity for electron transfer through the whole photosynthetic chain, based on the measurement of the reduction of ferredoxin. The chloroplasts isolated from D. pluvialis plants grown under visible light in combination with supplementary UV-B radiation have much greater membrane stacking in the thylakoid organization when compared with those grown without supplementary UV-B. The changes in the membrane organization induced by UV-B are also reflected in photochemical activity: oxygen-evolving phoptosystem II (PSII) activity is increased in UV-B chloroplasts compared with chloroplasts grown without UV-B, On this basis, it is concluded that the dynamic relation between the granal stacks and the stroma lamellae in the chloroplasts is closely related to the strategy by which plants are able to cope with a variety of environments and to optimize the photosynthetic machinery for the environmental conditions. The increase in membrane stacking in D. pluvialis, induced by supplementary UV-B radiation during plant growth, suggests that UV-B may be an essential factor for the development of membrane stacking in chloroplasts of higher plants. The mechanism of action of UV-B in this process is discussed. (C) 1999 Elsevier Science S.A. All rights reserved.


英文关键词chloroplasts Dimorphotheca pluvialis grana stacking UV-B ultraviolet
类型Article
语种英语
国家Sweden
收录类别SCI-E
WOS记录号WOS:000080366900010
WOS关键词THYLAKOID MEMBRANE ; PHOTOSYSTEM-II ; RADIATION ; GENES ; HETEROGENEITY ; COMPLEXES ; PROTEINS
WOS类目Biochemistry & Molecular Biology ; Biophysics
WOS研究方向Biochemistry & Molecular Biology ; Biophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/137762
作者单位(1)Univ Lund, Dept Biochem, S-22100 Lund, Sweden;(2)Univ Lund, Dept Plant Physiol, S-22100 Lund, Sweden
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GB/T 7714
Yu, SG,Bjorn, LO. Ultraviolet-B stimulates grana formation in chloroplasts in the African desert plant Dimorphotheca pluvialis[J],1999,49(1):65-70.
APA Yu, SG,&Bjorn, LO.(1999).Ultraviolet-B stimulates grana formation in chloroplasts in the African desert plant Dimorphotheca pluvialis.JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY,49(1),65-70.
MLA Yu, SG,et al."Ultraviolet-B stimulates grana formation in chloroplasts in the African desert plant Dimorphotheca pluvialis".JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 49.1(1999):65-70.
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