A Study On Ecological Significance Of Antioxidant Enzymes And Polyphenol Contents In Tamarix Rasosissima In Ejina

In this paper, the activity of POD, content of MDA and plant polyphenols in Tamarix rasosissima were measured by spectrophotometry on the basis of field investigation and sampling. The reflections of POD and MDA, under different soil water, were analyzed. Emphasis was placed on the content polyphenols in different tissues, sites, seasons, plant ages and soil water content. The following results were concluded: As a decreasing of soil water content, the activities of POD increased at first, but declined in a further decreasing. The content of MDA increased gradually with the declining of soil water content. The necessary soil water content to Tamarix rasosissima was more than 20%. The condensed tannin was mainly distributed in the roots. The smaller diameter the root was, the more condensed tannin was contained. Total phenolic in mid-aged plant was low relatively, while it was high in the young and the old. In different sites, the total phenolic was different significantly, which also happened in different seasons. It has been shown an inverse relationship between the content of total phenolic in plant and the soil water content. In addition, the content in plant varied seasonly. The time after stumping can affect the content of total phenolic in plant. The longer time after cutting, the higher content was indicated, which almost approximated to those not stumped.This was the first report we were aware of giving polyphenols characteristics of Tamarix rasosissima in roots, leaves and branches. The seasonal dynamic of total phenolic in Tamarix rasosissima and the relationship between the water containing in soil and total phenolic were studied. Also, the effect of stumping on the content of total phenolic was evaluated.