Effects of UV-B radiation on the growth and reproduction of Vicia angustifolia
Wang, Y.; Wang, X.-A.; Wang, R.-J.; Qiu, N.-W.; Ma, Z.-Q.; Du, G.-Z.
Ying Yong Sheng Tai Xue Bao 23(5): 1333-1338
2012
ISSN/ISBN: 1001-9332 PMID: 22919845 Document Number: 661992
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.