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| 孑遗植物银杏（Ginkgo biloba L．）雌雄株水分生理特征初步研究 | |
| 引用本文： | 曹全,江洪,曾波,余树全,王彬,蒋馥蔚.孑遗植物银杏（Ginkgo biloba L．）雌雄株水分生理特征初步研究[J].安徽农业科学,2009,37(18):8732-8735. |
| 作者姓名： | 曹全 江洪 曾波 余树全 王彬 蒋馥蔚 |
| 作者单位： | 1. 西南大学生命科学学院,三峡库区生态环境教育部重点实验室,重庆,400715 2. 西南大学生命科学学院,三峡库区生态环境教育部重点实验室,重庆,400715;南京大学国际地球系统科学研究所,江苏南京,210093;浙江林学院国际生态中心,浙江杭州,311300 3. 浙江林学院国际生态中心,浙江杭州,311300 |
| 基金项目： | 国家重点基础研究发展规划(973计划)，国家自然科学基金，科技部数据共享平台建设项目 |
| 摘 要： | 目的]研究银杏雌雄株在水分生理上的差异，探讨其水分利用策略，以及在进化过程中的重要作用。方法]对银杏雌雄株的树干液流（sap flow）、气孔导度（Gs）、蒸腾速率（Tr）以及水分利用效率（WUE）进行对比研究。结果]雌雄银杏的液流昼夜进程具有相似的规律，且白天雌雄株液流基本相同，夜间雄株液流大于雌株；不同性别银杏的丹和岱同样呈现为早晚高、午间低的曲线趋势，早晚雌株有比雄株更高的Tr和Gs，但中午11：00-14：00之间雌株的值低于雄株；雌雄银杏的WUE曲线变化趋势相似，但雌株的平均水分利用效率略小于雄株。结论]与其他伴性植物比较分析得知，不同性别银杏的水分生理有较强的趋同特征。这可能是在长期进化的压力下，雌雄异株植物的一种生存策略。 |
| 关 键 词： | 银杏 雌雄株 水分生理 |
Preliminary Study on Water Physiological Characters of Male and Female Ginkgo biloba L. |
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| Institution: | CAO Quan et al ( Key laboratory of eco-environments in Three gorges Reservoir Region of Ministry of Education, School of Life Science of Southwest University, Chongqing 400715) |
| Abstract: | Objective] The experiment aimed to study the difference of water physiology of male and female Ginkgo biloba L.for discussing the strategy of water utilization as well as the important role of this difference during evolution process.Method] The stem sap flow,stomatal conductance(Gs),transpiration rate(Tr) and water use efficiency(WUE) of male and female Ginkgo biloba L were comparatively studied.Result] The day-night process of flow on male and female Ginkgo biloba L.were similar.The flow on male and female Ginkgo biloba L.in day were almost same while the flow at night on male Ginkgo biloba L.was bigger than that on female Ginkgo biloba L.The Tr and Gs of male and female Ginkgo biloba L.were high in morning and at night but low at noon,while Tr and Gs of female Ginkgo biloba L.in morning and at night were higher than these of male Ginkgo biloba L.at the same time point.However,these indexes of female plant were lower than these of male plant from 11:00 to 14:00.WUE changing trends of male and female Ginkgo biloba L.were similar,while average water utilization rate of female Ginkgo biloba L.was slightly lower than that of male Ginkgo biloba L..Conclusion] Compared with other companion plants,water physiology of male and female Ginkgo biloba L had strong homoplasy.The phenomenon might be a survival strategy of dioecious plants under long term evolutionary pressure |
| Keywords: | Ginkgo biloba L Male and female plants Water physiology |
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