Characterization of photosynthesis of flag leaves in a wheat hybrid and its parents grown under field conditions

Journal of Plant Physiology
Xinghong YangCongming Lu

Abstract

Two wheat cultivars, one with high yield and the other with a high tolerance against oxidative stress, were compared with a hybrid of these two cultivars by investigating their photosynthetic characteristics of flag leaves. From the beginning of flowering to the 17th day, CO(2) assimilation rate (P(max)) was maintained and there were no appreciable differences between the hybrid and its parents. P(max) showed no decrease at noon compared to that in the morning. From the 20th to the 30th day of flowering, P(max) decreased significantly, and this decrease was significantly less in the hybrid than in its parents. The actual photosystem II (PSII) efficiency (Phi(PSII)) and the maximal efficiency of PSII photochemistry (F(v)/F(m)) showed a significant decrease only on the 30th day after anthesis; this decline was much less marked in the hybrid relative to its parents, both in the morning and at noon. A decrease occurred in Phi(PSII) and F(v)/F(m) at noon when compared to that in the morning, but this decrease was less marked in the hybrid than in its parents. Rubisco activity decreased significantly from the 13th day of flowering and was higher in the morning than at noon both in the hybrid and its parents. However, the hybrid alway...Continue Reading

References

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Citations

Jul 14, 2010·Journal of Genetics and Genomics = Yi Chuan Xue Bao·Hongwei LiZhensheng Li
Oct 29, 2015·Plant & Cell Physiology·Youshi TazoeAmane Makino
Apr 1, 2015·Photosynthesis Research·Baoshan WangXinghong Yang
Jun 10, 2014·Current Opinion in Plant Biology·Sascha Offermann, Christoph Peterhansel
Oct 24, 2017·Plant Cell Reports·Etsuko ItabashiTomohiro Kakizaki
Sep 26, 2020·International Journal of Molecular Sciences·Katarzyna JuzońEdyta Skrzypek
Jan 22, 2020·Journal of Experimental Botany·Pei-Chuan LiuElizabeth S Dennis

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