Host shoot clipping depresses the growth of weedy hemiparasitic Pedicularis kansuensis
Host shoot clipping depresses the growth of weedy hemiparasitic Pedicularis kansuensis
复制标题
DOI：
10.1007/s10265-015-0727-6
复制
发表时间：
2015-05
影响因子：
2.8
通讯作者：
Xiaolin Sui;Wei Huang;Yun-Ju Li;K. Guan;Ai-Rong Li
中科院分区：
文献类型：
--
作者：
Xiaolin Sui;Wei Huang;Yun-Ju Li;K. Guan;Ai-Rong Li
根半寄生植物通过吸收水分和养分而附着在合适的寄主上时，表现出最佳的生长。尽管寄主植物在野外经常受到各种形式的伤害(如放牧)，但寄主伤害对根半寄生虫生长和生理表现的影响仍不清楚。本研究通过剪除寄主枝条的方法，研究了寄主危害对甘肃披碱草半寄生植物光合作用和生长性能的影响及其与寄主披碱草的相互作用。光合作用能力、组织矿质养分含量和植物生物量。与寄主植物结合后，甘薯的感受性显著提高。寄主剪除对光量子效率(Φ)没有影响，但显著降低了生长速率和生物量OFP。甘肃。相比之下，剪叶显著提高了叶片的光合作用能力和钾素的积累。坚果。剪枝寄主植物的生物量没有明显下降。刈割通过改变养分的吸收和分配，影响了P与P之间的相互作用。甘肃及其寄主。结果表明，寄主剪除对杂草生长有明显的抑制作用。甘肃，但不影响生物量的积累。坚果。我们认为放牧(造成田间寄主损害的一种主要方式)可能在控制杂草半寄生虫方面具有潜力。
Root hemiparasitic plants show optimal growth when attached to a suitable host by abstracting water and nutrients. Despite the fact that damage to host plants in the wild occurs frequently in various forms (e.g. grazing), effects of host damage on growth and physiological performance of root hemiparasites remain unclear. In this study, host shoot clipping was conducted to determine the influence of host damage on photosynthetic and growth performance of a weedy root hemiparasite,Pedicularis kansuensis, and its interaction with a host,Elymus nutans. Photosynthetic capacity, tissue mineral nutrient content and plant biomass ofP. kansuensiswere significantly improved when attached to a host plant. Host clipping had no effect on quantum efficiency (ΦPSII), but significantly reduced the growth rate and biomass ofP. kansuensis. In contrast, clipping significantly improved photosynthetic capacity and accumulation of potassium inE. nutans. No significant decrease in biomass was observed in clipped host plants. By changing nutrient absorption and allocation, clipping affected the interaction betweenP. kansuensisand its host. Our results showed that host clipping significantly suppressed the growth of weedyP. kansuensis, but did not affect biomass accumulation inE. nutans. We propose that grazing (a dominant way of causing host damage in the field) may have a potential in the control against the weedy hemiparasite.