论文部分内容阅读
在棚室盆栽条件下,以外来杂草反枝苋(Amaranthus retroflexus)和作物大豆(Glycine max)为试验材料,模拟不同的降雨季节格局,研究两物种的比叶面积、丙二醛、脯氨酸和可溶性蛋白含量的季节动态变化。结果表明,在干旱少雨的条件下,两物种均通过减少比叶面积来减少水分的蒸发;但反枝苋积累的脯氨酸和可溶性蛋白含量均大于大豆。说明,在生长旺季缺水的条件下,反枝苋的膜质过氧化程度小于大豆,且恢复较好。生长初期混栽反枝苋的丙二醛含量均高于大豆,受水分胁迫影响较大;但进入大豆开花结荚期后,混栽反枝苋的脯氨酸含量高于大豆,膜质过氧化程度小于大豆,受水分胁迫影响较小。说明在反枝苋入侵农田的过程中,通过调节其自身形态特征和生理物质含量适应降雨季节波动,这可能是其在农田中分布广泛的重要原因之一。
Amaranthus retroflexus and Glycine max were used as experimental materials to simulate different rainfall season patterns and to study the leaf area, leaf area, malondialdehyde, Seasonal changes of acid and soluble protein content. The results showed that under both drought and drought conditions, both species reduced the evaporation of water by reducing the specific leaf area. However, the content of proline and soluble protein accumulated in Amaranthus retroflexus was higher than that of soybean. This indicated that under the condition of water shortage during the growing season, the degree of membranous peroxidation of D. viscosum was less than that of soybean, and recovery was better. The content of malondialdehyde in mixed planted Amaranthus retroflexus was higher than that in soybean at the initial stage of growth, but was more affected by water stress. However, the content of proline in the planted Amaranthus retroflexus was higher than that in soybean after flowering and podding stage The degree of oxidation is less than that of soybean and is less affected by water stress. This indicated that during the invasion of farmland by Amaranthus retroflexus, the seasonality of rainfall could be adjusted by adjusting its own morphological characteristics and physiological substance content, which may be one of the important reasons for its widespread distribution in farmland.