Wang Yi Feng, Qi Ru Lin, Yang Ya Jun, Yang Yang, Song Wei Dong, Mao Wan Yi
College of Life Science, Northwest Normal University, Lanzhou 730070, China.
Ying Yong Sheng Tai Xue Bao. 2018 Jan;29(1):68-74. doi: 10.13287/j.1001-9332.201801.007.
The paper studied the effects of altitude on reproductive characteristics in 12 populations of Saussurea przewalskii at the eastern Qinhai-Tibetan Plateau, China. The results showed that the size, reproductive organ biomass, vegetative organ biomass, capitulum number, and seed number of individual plant decreased with the increasing altitude, and the capitulum mass and hundred-grain mass increased continuously. S. przewalskii could ensure its reproduction by reducing plant body size to decrease resource consumption, and increasing the allocation of limit resources to flower biomass. In order to ensure sexual reproduction, the reproductive allocation of the plants increased with increasing the altitude. There was a trade-off between capitulum number and capitulum mass, and between seed number and hundred-grain mass, which allowed the plants to maximize their fitness under stressful conditions.
该论文研究了海拔对中国青藏高原东部12个祁连风毛菊种群繁殖特性的影响。结果表明，随着海拔升高，单株植物的大小、生殖器官生物量、营养器官生物量、头状花序数和种子数减少，而头状花序质量和百粒质量持续增加。祁连风毛菊可通过减小植株大小以减少资源消耗，并增加将有限资源分配到花生物量中，来确保其繁殖。为确保有性繁殖，植株的繁殖分配随海拔升高而增加。头状花序数与头状花序质量之间、种子数与百粒质量之间存在权衡，这使得植物在胁迫条件下能够最大限度地提高其适合度。
