Effects of Enhanced UV-B Radiation on the Growth and Photosynthesis Characteristics of Soybean( Glycine max Merr. ) under Field Condition
Lü Zhiwei
ZHANG Lingxuan
WANG Jin
WANG Jiefei
ZHANG Wenhui
Abstract：To study the effects of enhanced UV-B radiation on biomass, chlorophyll content and photosynthetic indices of soybean ( Glycine max Merr. ) , simulated treatments with enhanced UV-B radiation under field condition were applied and related indices were measured in this research. The results showed that, enhanced UV-B radiation inhibited the growth and development during flowering period(21. 8% for plant height and 77. 0% for dry weight) and seed-filling period(18. 9% for plant height and 20. 8% for dry weight). The UV-B radiation made the flavonoids content and malondialdehyde ( MDA) content increase during branching period(61. 7% and 35. 2% respectively) and flowering period (28. 9% and 37. 4% respectively). The net photosynthetic rate was inhibited by 23. 2%,35. 9% and 20. 8% during the three periods, respectively. The stomatal conductance was also inhibited and the intercellular CO2 concentration was increased. The enhanced UV-B radiation mainly inhibited the content of chlorophyll during branching period(19. 4%),but no significant effect on ΦPSⅡ was found. In conclusion,enhanced UV-B radiation showed significant inhibition effects on net photosynthetic rate, stomatal conductance and CO2 assimilation rate, and the growth and biomass accumulations in soybean were finally decreased.
Keywords：UV-Bsoybeanflavonoidsphotosynthesis characteristicsbiomass
Publication Date：2016-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：4( 42-45 )