UV-B辐射对植物花粉萌发率和花粉管生长的累积效应

应用生态学报 ›› 2002, Vol. ›› Issue (7): 814-818.

UV-B辐射对植物花粉萌发率和花粉管生长的累积效应

冯虎元, 安黎哲, 谭玲玲, 侯宗东, 王勋陵

兰州大学生命科学学院和干旱农业生态国家重点实验室, 兰州 730000

收稿日期:1999-10-18 修回日期:2000-02-18 出版日期:2002-07-15
通讯作者: 王勋陵
基金资助:
国家自然科学基金(39670132;39970126);中国科学院兰州冰川冻土所冻土工程国家重点实验室基金(9808);中国科学院重点B资助项目(KZ952S1216).

Cumulative effect of solar ultraviolet B radiation on pollen germination and tube growth of19 species in vitro

FENG Huyuan, AN Lizhe, TAN Lingling, HOU Zongdong, WANG Xunling

School of Life Sciences, Key State Laboratory of Arid Agroecology, Lanzhou University, Lanzhou 730000

Received:1999-10-18 Revised:2000-02-18 Online:2002-07-15

摘要/Abstract

摘要： 研究了19种植物花粉在不同UVB辐射强度和辐照时间下其萌发率和花粉管伸长的变化.结果表明,UVB辐射增加显著抑制大多数植物花粉的萌发率和花粉管生长;与对照相比,较高强度的UVB对花粉的抑制作用大于较低强度;几个种的花粉萌发率及花粉管生长对UVB增强不敏感,甚至被UVB辐射所促进;辐射时间越长,对花粉抑制作用愈大,说明具有辐射累积效应.由此可知,植物花粉的萌发过程对UVB的敏感性变化在自然条件下将会产生严重的生态学后果.

Abstract: In order to determine the response of pollen to UV-B irradiation and the cumulative effects of UV-B exposure time on pollen germination and tube growth of plants,19 species were investigated in vitro by exposing their pollen grains to two levels of enhanced ultravioet B(UV-B_BE)(280～320 nm,350 and 500 mW/m² biologically effective UV-B radiation), simulating8% and 21% stratospheric ozone depletion in Lanzhou, China (36.04°N,1550 m),and to no UV-B (control group).Compared with the control,enhanced UV-B radiation significantly inhibited pollen germination and tube growth in most species.Higher UV-B flux rate caused greater inhibitory effect than lower UV-B radiation level.Several test plants exhibited insensitivity,even stimulation of pollen germination and tube growth to UV-B. The reduction in pollen germination rate and tube growth increased with exposure time, which indicated a cumulative effect of UV-B radiation.It is concluded that changes in pollen susceptibility to UV-B would have a serious ecological consequence under natural conditions.

中图分类号:

Q945

冯虎元, 安黎哲, 谭玲玲, 侯宗东, 王勋陵. UV-B辐射对植物花粉萌发率和花粉管生长的累积效应[J]. 应用生态学报, 2002, (7): 814-818.

FENG Huyuan, AN Lizhe, TAN Lingling, HOU Zongdong, WANG Xunling . Cumulative effect of solar ultraviolet B radiation on pollen germination and tube growth of19 species in vitro[J]. Chinese Journal of Applied Ecology, 2002, (7): 814-818.

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