Deng Li-Li, Lyu Pei, Huang Xue-Qi, Zhang Zhen, Wang Li-Chao, Liu Yao
College of Resource and Environment, Anhui Agricultural University, Hefei 230036, China.
Ying Yong Sheng Tai Xue Bao. 2020 Jul;31(7):2202-2210. doi: 10.13287/j.1001-9332.202007.020.
It is an effective approach to control invasive plants based on the allelopathic effect of native plants with higher economic values, from the perspective of allelopathy. The aim of this study was to test the allelopathic effect of a local crop, sweet potato (), on the invasive plant . Water extracts from different organs of sweet potato (roots, stems, leaves) with three concentrations (0.025, 0.05, 0.1 g·mL) were used in the study. To test the effect of sweet potato on rhizome growth of , the morphological index (ramet number, node number, leaf number, leaf area, plant height, total dry weight and root number of new ramets), allelopathic response index, trait values (succulent degree, root-shoot ratio, specific leaf area, leaf mass ratio, stem mass ratio, root mass ratio), CAT, POD, MDA and SOD in young leaves were measured. The results showed that 1) Water extracts from different organs of sweet potato with different concentrations differed in their effects on the growth of . Water extract from root with 0.1 g·mL significantly inhibited all morphological indices. Except total dry weight and root number, other morphological indices decreased significantly with increasing concentration of water extract from all organs. 2) The synthetic allelopathic response index (RI) was negative under all treatments, indicating that water extract of sweet potato had negative effects on all indices of and thus inhibited their growth. Among all the treatments, water extract from root with a concentration of 0.1 g·mL had the strongest allelopathic inhibition (RI=-0.73), followed by that from stem with a concentration of 0.1 g·mL(RI=-0.44) and from root with a concentration of 0.05 g·mL(RI=-0.44). 3) Water extract of sweet potato had significant inhibitory effects on the degree of succulence, root-shoot ratio, specific leaf area, and leaf mass ratio, but did not affect stem mass ratio and root mass ratio. 4) Water extract of sweet potato significantly increased the contents of MDA and SOD in the fresh leaves of , while had no effect on the contents of CAT and POD. All these results indicates that water extract of sweet potato significantly suppress the ramet growth of .
从化感作用的角度来看，基于具有较高经济价值的本土植物的化感作用来控制入侵植物是一种有效的方法。本研究的目的是测试当地作物甘薯（）对入侵植物的化感作用。研究中使用了甘薯不同器官（根、茎、叶）的三种浓度（0.025、0.05、0.1 g·mL）的水提取物。为了测试甘薯对的根茎生长的影响，测量了形态指标（分株数、节数、叶数、叶面积、株高、新分株的总干重和根数）、化感响应指数、性状值（肉质化程度、根冠比、比叶面积、叶质量比、茎质量比、根质量比）、幼叶中的CAT、POD、MDA和SOD。结果表明：1）不同浓度的甘薯不同器官的水提取物对的生长影响不同。0.1 g·mL根的水提取物显著抑制了所有形态指标。除总干重和根数外，所有器官的水提取物浓度增加时，其他形态指标均显著下降。2）所有处理下的综合化感响应指数（RI）均为负值，表明甘薯水提取物对的所有指标均有负面影响，从而抑制了它们的生长。在所有处理中，浓度为0.1 g·mL的根的水提取物化感抑制作用最强（RI = -0.73），其次是浓度为0.1 g·mL的茎的水提取物（RI = -0.44）和浓度为0.05 g·mL的根的水提取物（RI = -0.44）。3）甘薯水提取物对肉质化程度、根冠比、比叶面积和叶质量比有显著抑制作用，但对茎质量比和根质量比没有影响。4）甘薯水提取物显著增加了新鲜叶片中MDA和SOD的含量，而对CAT和POD的含量没有影响。所有这些结果表明，甘薯水提取物显著抑制了的分株生长。
