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Start Over Coverage 147-152 Subject photosystems 1 and 2

1. Responses of photosynthetic apparatus in rice cultivars under heat stress

Creator:
Bose, A. and Ghosh, B.
Format:
print
Type:
model:internalpart and TEXT
Subject:
chlorophyll fluorescence, electron transport rate, heat sensitivity, heat tolerance, net photosynthetic rate, Oryza sativa L., photosystems 1 and 2, temperature, and thermal stability
Language:
Multiple languages
Description:
The effect of heat stress (35 to 50 °C) on photosynthesis was investigated in heat tolerant (N 22) and heat sensitive (IR 8) cultivars of rice {Oryza sativa L.). The net photosynthetic rate showed greater thermal stability in N 22 than in IR 8. The relative dechne of the rate of whole chain electron transport and photosystem 2 (PS2) activity was more pronounced in IR 8 than N 22. In both cultivars photosystem (PSI) activity was stimulated by thermal treatment. Chlorophyll (Chl) a fluorescence transient arising ffom PS2 showed inhibition in both cultivars at 45 and 50 °C. Maximum fluorescence decreased more in IR 8 than in N 22 by high temperature treatment.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public