Wang Lu Yao, Jin Fang Mei, Jin Yi Jing, Xui Jia Qing, Wen Wen, Chen Jian Hua, Ye Duo
College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
Ying Yong Sheng Tai Xue Bao. 2018 Feb;29(2):501-506. doi: 10.13287/j.1001-9332.201802.004.
Oxalis articulata, an alien clonal plant species, is widely cultivated in China as an ornamental species, and has escaped and became naturalized. Belowground storage in tubers of O. articulata may play a key role for the potential invasion. In this study, we investigated the responses of its clonal resource storage strategy to mowing, aiming to uncover the mechanism underlying their invasion from a perspective of clonal storage. We examined the changes of biomass in different organs, biomass allocation, and several functional traits of roots, tubers and leaves in O. articulata by conducting a greenhouse experiment. The results showed that significant main and interactive effects of mowing intensity and mowing frequency on some functional traits of leaves and roots were found. In contrast, tuber biomass and total biomass did not vary under different mowing treatments. The frequent mowing significantly increased the biomass allocation to tubers. These findings demonstrated that clonal storage, to some extent, could enhance the resistance of O. articulata to environmental disturbance, which might promote its invasiveness.
关节酢浆草是一种外来克隆植物物种，在中国作为观赏植物被广泛种植，现已逸生并归化。关节酢浆草块茎的地下储存可能对其潜在入侵起着关键作用。在本研究中，我们调查了其克隆资源储存策略对刈割的响应，旨在从克隆储存的角度揭示其入侵的机制。我们通过进行温室实验，研究了关节酢浆草不同器官生物量的变化、生物量分配以及根、块茎和叶片的几个功能性状。结果表明，刈割强度和刈割频率对叶片和根的一些功能性状有显著的主效应和交互效应。相比之下，在不同的刈割处理下，块茎生物量和总生物量没有变化。频繁刈割显著增加了块茎的生物量分配。这些发现表明，克隆储存在一定程度上可以增强关节酢浆草对环境干扰的抗性，这可能促进其入侵性。
