[Effects of UV-B radiation on the growth and reproduction of Vicia angustifolia].
A simulation experiment with supplementation and exclusion of solar ultraviolet-B (UV-B) radiation was conducted to study the effects of enhanced and near ambient UV-B radiation on the growth and reproduction of alpine annual pasture Vicia angustifolia on Qinghai-Tibet Plateau. Enhanced UV-B decreased the plant height and biomass, biomass allocation to fruit, flower number, and 100-seed mass significantly, delayed flowering stage, increased the concentration degree of flowering and success rate of reproduction, but had little effect on seed yield. Near ambient UV-B radiation made the plant height increased after an initial decrease, decreased biomass allocation to fruit and 100-seed mass, but little affected flowering duration, flower number, and seed yield. Both enhanced and near ambient UV-B radiation could inhibit the growth and production of V. angustifolia, and the effect of enhanced UV-B radiation was even larger.
College of Life Science, Qufu Normal University, Qufu 273165, Shandong, China. yingwangjn@yahoo.cn
Ying
Y
Wang
Xing-An
XA
Wang
Ren-Jun
RJ
Wang
Nian-Wei
NW
Qiu
Zong-Qi
ZQ
Ma
Guo-Zhen
GZ
Du
D018533:Biomass; D002681:China; D003198:Computer Simulation; D017753:Ecosystem; D014466:Ultraviolet Rays; D031306:Vicia / Q000145:classification / Q000254:growth & development* / Q000528:radiation effects*