克里雅河芦苇对不同土壤环境的生理响应

Physiological responses of Phragmites communis to different soil environments in Keriya River

以克里雅河流域的芦苇(Phragmites communis)为研究对象,研究在不同土壤环境下克里雅河流域荒漠植物的生理适应性,分析芦苇的生物量、叶绿素、可溶性糖、丙二醛(MDA)含量、过氧化物酶(POD)活性等生理指标的变化特征,并使用通径分析方法研究对芦苇生理指标产生影响的因子。结果表明:芦苇受到盐胁迫和干旱胁迫时,生物量积累会受到抑制,相比绿洲土,盐泽土中的生物量减少60%,风沙土减少18.8%;但芦苇会提高地下生物量所占比重来适应胁迫环境,风沙土中芦苇的地下生物量所占比重达78.5%。芦苇的生理指标主要受土壤水盐因子的影响,叶绿素含量、可溶性糖含量和POD活性主要受水分的影响,蛋白质、脯氨酸和MDA含量主要受盐分的影响;在受到胁迫时,叶绿素含量、蛋白质含量、POD活性减小,可溶性糖、脯氨酸和MDA含量增加。

In order to study the physiological adaptability of desert plants living in Keriya River under different soil environments, this paper took Phragmites communis as the research object, analyzed the feature changes of physiological indicators including biomass, chlorophyll, soluble sugar, malondialdehyde （MDA） content, peroxidase （POD） activity, and researched the factors affecting physiological indices of P. communis by using path analysis. The results showed thab coerced by salt and drought stress, the biomass accumulation of P communis was inhibited. Compared with oasis soil, biomass of salt marshes soil decreased by 60%, and the reduction was 18.8% in sandy soil. But P. communis could adapt stress environment by increasing the proportion of underground biomass, the proportion of underground biomass of R communis in sandy soil reached 78.5%. The physiological indicators of P. communis were mainly affected by soil water and salinity, chlorophyll content, soluble sugar content and POD activity were mainly affected by moisture, and protein content, proline and MDA content were mainly affected by salinity. Under stress, chlorophyll content, protein content, POD activity decreased, while soluble sugar content, proline content, MDA content increased. Plants would adapt the changes of salinity and water in soil by such kinds of regulatory mechanism.