盐胁迫下火炬树水浸液对小麦种子萌发的化感作用

Allelopathic Effects of Water Extraction from Rhus Typhina Leaf and Root on Germination of Wheat under Salt Stress

以小麦种子为研究材料,用不同浓度盐溶液(0.05mol·L^(-1),0.1mol·L^(-1),0.15mol·L^(-1),0.2mol·L^(-1))与火炬树根和叶浸提液的混合液处理小麦种子,观察分析各个处理对小麦种子萌发和幼苗生长的影响,研究火炬树根、叶在不同盐分胁迫下的化感作用。结果表明:火炬树根、叶浸提液均对小麦种子的萌发产生抑制的化感作用,并且叶浸提液的化感作用强于根浸提液的化感作用。火炬树根浸提液化感作用的强弱与盐溶液浓度有关,在低盐浓度(0.05mol·L^(-1),0.1mol·L^(-1))下,根浸提液化感作用减弱,高盐浓度下化感作用增强。叶浸提液的化感作用随盐溶液浓度的增加呈增强的趋势。

The allelopathic effects of different concentrations of salt solution(0.05 mol·L^(-1),0.1 mol·L^(-1),0.15 mol·L^(-1),0.2 mol·L^(-1))mixed with water extraction from root and leaf litter of Rhus typhina on the germination of wheat seeds are investigated.The results indicate that,R.typhina allelopathy of water extraction is different under different salt stress conditions.The germination of wheat is significantly inhibited by water extractions from both root and leaf litter of R.typhina.The allelopathic effect of leaf on the germination of wheat seeds is higher than that of root.Low salt concentration(0.05 mol·L^(-1),0.1 mol·L^(-1))stress weakens the allelopathy effect of root extraction.However,the allelopathy effect of leaf extraction is increased by each concentration of salt leaching liquor in our experiment.