草业学报2013，Vol.22Issue(2)：243-249,7.
营养生长期雌雄葎草表观性状对水分胁迫响应的性别差异
Humulus scandens gender differences in response to water stress in the vegetative growth stage
摘要
Abstract
Humulus scandens in the vegetative growth stage was treated with the drought stress of four water gradients. When the sex could be identified, some indicators of single male and female plants, including the quantitative traits of components (root, stem, leaves), fresh weight, hay weight, and the proportion of component to total biomass, were measured and analyzed. H. scandens responded to water stress by significantly shortening the duration of vegetative growth. Male plants were more sensitive to the lack of water than female plants. Response to water stress was in the order roots, leaves, and stems. Root moisture content was reduced to meet the needs of stems and leaves to water. Meanwhile, the plant reduced the consumption of water by reducing the number of leaves and branches and by narrowing leaf area and stem length. These indicators (including total leaf area, branch, length and volume of stem, length and volume of root) were lower on male than on female plants. Water had a highly significant effect on fresh weight and hay weight of each component. Sex significantly affected only the biomass of roots. The total biomass of male plants was significant lower than that of female plants, but there was no difference between them in the distribution of each component of the biomass. H. scandens responded to water stress by reducing investment in vegetative growth and quickly switching into reproductive growth, which laid the foundation for reproduction and expansion of the population.关键词
葎草/雌雄异株/营养生长/生物量/构件Key words
Humulus scandens/ dioecism/ vegetative growth/ biomass/ component分类
农业科技引用本文复制引用
刘金平,段婧..营养生长期雌雄葎草表观性状对水分胁迫响应的性别差异[J].草业学报,2013,22(2):243-249,7.基金项目
国家科技支撑计划(2011BAD17B03),四川省科技支撑计划(2011NZ0064)和四川省教育厅(08zc008)资助. （2011BAD17B03）
