Rice leaf heterogeneity in chlorophyll fluorescence parameters under short-term osmotic stress

J. Z. Li; Y. P. Chen; K. Q. Teng; L. Z. Qin; Y. X. Du; J. Zhang; Q. Z. Zhao

doi:10.1007/s10535-014-0481-y

Biologia Plantarum (Jan 2015)

Rice leaf heterogeneity in chlorophyll fluorescence parameters under short-term osmotic stress

J. Z. Li,
Y. P. Chen,
K. Q. Teng,
L. Z. Qin,
Y. X. Du,
J. Zhang,
Q. Z. Zhao

Affiliations

J. Z. Li: Collaborative Innovation Center of Henan Grain Crops, Rice Engineer Center and Key Laboratory of Physiology, Ecology and Genetics Improvement of Food Crop in Henan Province, Henan Agricultural University, Zhengzhou, P.R. China
Y. P. Chen: Collaborative Innovation Center of Henan Grain Crops, Rice Engineer Center and Key Laboratory of Physiology, Ecology and Genetics Improvement of Food Crop in Henan Province, Henan Agricultural University, Zhengzhou, P.R. China
K. Q. Teng: Collaborative Innovation Center of Henan Grain Crops, Rice Engineer Center and Key Laboratory of Physiology, Ecology and Genetics Improvement of Food Crop in Henan Province, Henan Agricultural University, Zhengzhou, P.R. China
L. Z. Qin: Collaborative Innovation Center of Henan Grain Crops, Rice Engineer Center and Key Laboratory of Physiology, Ecology and Genetics Improvement of Food Crop in Henan Province, Henan Agricultural University, Zhengzhou, P.R. China
Y. X. Du: Collaborative Innovation Center of Henan Grain Crops, Rice Engineer Center and Key Laboratory of Physiology, Ecology and Genetics Improvement of Food Crop in Henan Province, Henan Agricultural University, Zhengzhou, P.R. China
J. Zhang: Collaborative Innovation Center of Henan Grain Crops, Rice Engineer Center and Key Laboratory of Physiology, Ecology and Genetics Improvement of Food Crop in Henan Province, Henan Agricultural University, Zhengzhou, P.R. China
Q. Z. Zhao: Collaborative Innovation Center of Henan Grain Crops, Rice Engineer Center and Key Laboratory of Physiology, Ecology and Genetics Improvement of Food Crop in Henan Province, Henan Agricultural University, Zhengzhou, P.R. China

DOI: https://doi.org/10.1007/s10535-014-0481-y
Journal volume & issue: Vol. 59, no. 1
pp. 187 – 192

Abstract

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The effects of short-term osmotic stress [a polyethylene glycol (PEG) treatment] on photosystem II (PS II) of upland and lowland rice seedlings were investigated using chlorophyll (Chl) fluorescence imaging. Spatial heterogeneity in the top fully expanded leaf for all Chl fluorescence parameters was found under stress conditions. After exposure to PEG, a decrease in the effective quantum yield of PS II photochemistry (φPS II) and photochemical quenching (qP), and an increase in non-photochemical quenching (NPQ) proceeded from the upper section to the base of the leaf. The most sensitive position in the leaf was different between the two ecotypes. Chl fluorescence parameters, net photosynthetic rates (PN), and stomatal conductance (gs) were more sensitive to the PEG stress in upland rice than in lowland rice. These results also indicate different leaf anatomy and development in the two rice ecotypes. Additionally, the findings suggest a more rapid stress response in upland rice.

Published in Biologia Plantarum

ISSN: 1573-8264 (Online)
Publisher: Institute of Experimental Botany of the Czech Academy of Sciences
Country of publisher: Czechia
LCC subjects: Science: Biology (General); Science: Botany: Plant ecology
Website: https://bp.ueb.cas.cz/

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