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Start Over Creator Bai, J.

1. Low concentrations of glycine inhibit photorespiration and enhance the net rate of photosynthesis in Caragana korshinskii

Creator:
Kang, T., Wu, H. D., Lu, B. Y., Luo, X. J., Gong, C. M., and Bai, J.
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
fotosyntéza, photosynthesis, chlorofylová fluorescence, výměna plynu, pozitivní korelace, stomatální faktor, chlorophyll fluorescence, gas exchange, nonstomatal factor, stomatal factor, 2, and 581
Language:
Multiple languages
Description:
The inhibition of photorespiration can be used to improve plant carbon fixation. In order to compare the effects of three photorespiration inhibitors [glycine, NaHSO3, and isonicotinyl hydrazide (INH)], photosynthetic parameters of leaves sprayed respectively with these chemicals were examined and their inhibiting efficiency was evaluated in Caragana korshinskii. Our results showed that 5 mM glycine could reduce the photorespiratory rate (PR) effectively, while the net photosynthetic rate (PN), stomatal conductance (gs), and intercellular CO2 concentration (Ci) significantly increased. The ratio of electron flow for ribulose-1,5-bisphosphate (RuBP) carboxylation to RuBP oxygenation was elevated markedly. NaHSO3 and INH could also suppress the PR in some cases, whereas PN was not improved. The glyoxylate content increased considerably after application of low concentrations of glycine. These results suggested that low concentrations of glycine could suppress photorespiration by feed-back inhibition of glyoxylate and enhance photosynthesis by regulating gs, Ci, and the distribution of electron flow in C. korshinskii., T. Kang, H. D. Wu, B. Y. Lu, X. J. Luo, C. M. Gong, J. Bai., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2. Photoprotective function of photorespiration in Reaumuria soongorica during different levels of drought stress in natural high irradiance

Creator:
Bai, J., Xu, D. H., Kang, H. M., Chen, K., and Wang, G.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
chlorophyll fluorescence, electron flow, gas exchange, hydrogen peroxide, intercellular CO2 concentration, isonicotinic acid hydrazide, leaf abscission, leaf temperature, photoinhibition, and stomatal conductance
Language:
Multiple languages
Description:
Diurnal patterns of gas exchange and chlorophyll (Chl) fluorescence parameters of photosystem 2 (PS2) as well as H2O2 content were analyzed in Reaumuria soongorica (Pall.) Maxim., a perennial semi-shrub. The rate of photorespiration was estimated by combined measurement of gas exchange and Chl fluorescence. The rate of photorespiration increased with the increasing drought stress (DS). The ratio of carboxylation electron flow to oxygenation electron flow (Jc/Jo) and the maximal photochemical efficiency of PS2 (variable to maximum fluorescence ratio, Fv/Fm) decreased with the increasing DS. Fv/Fm in isonicotinic acid hydrazide (INH)-sprayed plants was lower than that in normal plants under moderate DS, but no significant difference was observed under severe DS. H2O2 content in INH-sprayed plants was significantly lower than that in normal plants under severe DS. Taken together, photorespiration in R. soongorica consumed excess electrons and protected photosynthetic apparatus under moderate DS, whereas it accelerated H2O2 accumulation markedly and induced the leaf abscission under severe DS. and J. Bai ... [et al.].
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public