学术活动 |
|
友情链接 |
|
|
|
论文 |
|
论文题目: |
Pollen sensitivity to ultraviolet-B (UV-B) suggests floral structure evolution in alpine plants
|
论文题目英文: |
|
作者: |
Zhang, Chan; Yang, Yong-Ping; Duan, Yuan-Wen
|
论文出处: |
|
年: |
2014
|
卷: |
4 |
期: |
|
页: |
- |
联系作者: |
|
发表期刊: |
SCIENTIFIC REPORTS |
第一作者所在部门: |
|
收录类别: |
|
影响因子: |
|
摘要: |
Various biotic and abiotic factors are known to exert selection pressures on floral traits, but the influence of ultraviolet-B (UV-B) light on the evolution of flower structure remains relatively unexplored. We have examined the effectiveness of flower structure in blocking radiation and the effects of UV-B on pollen viability in 42 species of alpine plants in the Hengduan Mountains, China. Floral forms were categorized as either protecting or exposing pollen grains to UV-B. The floral materials of plants with exposed and protected pollen grains were able to block UV-B at similar levels. Exposure to UV-B radiation in vitro resulted in a significantly greater loss of viability in pollen from plant species with protective floral structures. The pronounced sensitivity of protected pollen to UV-B radiation was associated with the type of flower structure. These findings demonstrate that UV-B plays an important role in the evolution of protective floral forms in alpine plants. |
英文摘要: |
|
外单位作者单位: |
|
ISSN: |
|
|
|