胡卢巴属4种短命植物的生长特点及繁殖分配动态

The Gowth Characteristics and the Reproductive Allocation Dynamics in Four Ephemeral Species of Trigonella

对生长在新疆准噶尔荒漠中的胡卢巴属4种短命植物的生长发育及生物量分配动态进行了研究,探讨了其在荒漠环境中的生长与繁殖对策。结果表明:4种植物的营养与繁殖构件在不同物候阶段的生长速度不同,且在整个生长期中生物量分配是动态变化的,最终达到高的繁殖分配比率。4种胡卢巴通过调节营养与繁殖生长的速度及资源分配,以积极适应多变的环境,在短的生长期内达到繁殖成功并使繁殖分配比率最大。

The growth and the biomass allocation dynamic of plants in four ephemeral species of Trigonella which mainly were distributed in Junggar desert of Xinjiang in China were observed, and their reproductive strategies and adaptive mechanism in the arid environment were analyzed in this paper. Both the growth rate of their vegetative and reproductive modules and their reproductive allocation are different at the different phase of their life cycle. In order to adapt to the extreme environment, the four species adjust the growth rate of vegetative and reproductive modules and the proportion of resource allocation between the vegetative and the reproductive growth. The reproductive yields are maximized by an instantaneous switch from vegetative to reproductive growth after a short period of vegetative growth.