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Chlorophyll a fluorescence changes in response to short and long term high light stress in rice seedlings

Chlorophyll a fluorescence changes in response to short and long term high light stress in rice... Investigations were carried out to study the high light stress effects on photosystem (PS) II efficiency in intact leaves of four rice (Oryza sativa L.) cultivars, viz., Jyothi, Aiswarya, Swarnaprabha and Kanchana. Rice seedlings were exposed to high light stress of 2000 µmol m−2 s−1, and the photochemistry of the four rice cultivars was studied by analyzing chlorophyll-a (Chla) fluorescence at 0 (control), 2 and 8 h. The results showed that Fv/Fo, performance index, area above the flourescence curve, Φo/(1 − Φo), ΦDo, ΦEo, Vj and DIo/CSo were found to be more reliable for exploring the effect of changes in PSII activity after high light stress application for short term (2 h), which can aid in distinguishing the tolerant and sensitive rice cultivars. Some Chla fluorescence parameters (Fm, SFI, Fv/Fm, Ψo/(1 − Ψo), ETo/CSo, ABS/CSo) were modified only after exposing the plants to high light stress for 8 h. The order of high light stress tolerance of these cultivars according to the analysis of Chla fluorescence parameters was Jyothi > Aiswarya > Swarnaprabha > Kanchana. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Indian Journal of Plant Physiology Springer Journals

Chlorophyll a fluorescence changes in response to short and long term high light stress in rice seedlings

Indian Journal of Plant Physiology , Volume 22 (1) – Sep 9, 2016

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References (12)

Publisher
Springer Journals
Copyright
Copyright © 2016 by Indian Society for Plant Physiology
Subject
Life Sciences; Plant Sciences; Plant Physiology; Plant Ecology; Plant Biochemistry; Cell Biology; Plant Genetics & Genomics
ISSN
0019-5502
eISSN
0974-0252
DOI
10.1007/s40502-016-0244-1
Publisher site
See Article on Publisher Site

Abstract

Investigations were carried out to study the high light stress effects on photosystem (PS) II efficiency in intact leaves of four rice (Oryza sativa L.) cultivars, viz., Jyothi, Aiswarya, Swarnaprabha and Kanchana. Rice seedlings were exposed to high light stress of 2000 µmol m−2 s−1, and the photochemistry of the four rice cultivars was studied by analyzing chlorophyll-a (Chla) fluorescence at 0 (control), 2 and 8 h. The results showed that Fv/Fo, performance index, area above the flourescence curve, Φo/(1 − Φo), ΦDo, ΦEo, Vj and DIo/CSo were found to be more reliable for exploring the effect of changes in PSII activity after high light stress application for short term (2 h), which can aid in distinguishing the tolerant and sensitive rice cultivars. Some Chla fluorescence parameters (Fm, SFI, Fv/Fm, Ψo/(1 − Ψo), ETo/CSo, ABS/CSo) were modified only after exposing the plants to high light stress for 8 h. The order of high light stress tolerance of these cultivars according to the analysis of Chla fluorescence parameters was Jyothi > Aiswarya > Swarnaprabha > Kanchana.

Journal

Indian Journal of Plant PhysiologySpringer Journals

Published: Sep 9, 2016

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