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Ultraviolet-B stimulates grana formation in chloroplasts in the African desert plant Dimorphotheca pluvialis

Yu, Shi-Gui and Björn, Lars Olof LU (1999) In Journal of Photochemistry and Photobiology, B: Biology 49(1). p.65-70
Abstract
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... (More)
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. (Less)
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Contribution to journal
publication status
published
subject
in
Journal of Photochemistry and Photobiology, B: Biology
volume
49
issue
1
pages
65 - 70
publisher
Elsevier
external identifiers
  • scopus:0033103431
ISSN
1011-1344
DOI
10.1016/S1011-1344(99)00018-4
language
English
LU publication?
yes
id
1ff4c69b-f66d-489d-b33b-637c9df0407a (old id 134420)
date added to LUP
2007-07-06 16:51:19
date last changed
2017-01-01 06:52:54
@article{1ff4c69b-f66d-489d-b33b-637c9df0407a,
  abstract     = {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.},
  author       = {Yu, Shi-Gui and Björn, Lars Olof},
  issn         = {1011-1344},
  language     = {eng},
  number       = {1},
  pages        = {65--70},
  publisher    = {Elsevier},
  series       = {Journal of Photochemistry and Photobiology, B: Biology},
  title        = {Ultraviolet-B stimulates grana formation in chloroplasts in the African desert plant Dimorphotheca pluvialis},
  url          = {http://dx.doi.org/10.1016/S1011-1344(99)00018-4},
  volume       = {49},
  year         = {1999},
}