养分异质条件下连接和断开结缕草克隆分株抗氧化酶及丙二醛的生理整合

以克隆植物结缕草(Zoysia japonica)为研究对象,对连接和断开的分株进行了不同养分处理,研究了养分异质条件下结缕草克隆分株抗氧化酶活性及丙二醛含量的变化。结果表明,在养分异质条件下,处于中高养分水平的母株可以显著提高与其相连的子株超氧化物歧化酶(SOD)和过氧化氢酶(CAT)的活性,降低丙二醛(MDA)含量(P0.05);处于中高养分水平的子株对与其相连的母株抗氧化酶活性及丙二醛含量没有显著影响(P0.05)。在养分异质条件下,结缕草母株对子株存在生理整合,子株可以从母株获益,但母株不能从子株获益,子株是生理整合单向获益者。

Physiological integration of antioxidant enzymes and malondialdehyde in connected and disconnected Zoysia japonica clonal ramet under nutrient heterogeneity

Using a clonal Zoysia japonica plant as the experimental subject,connected and disconnected ramets were treated with different nutrient concentrations,and the study was conducted to analyze changes in antioxidant enzyme activity and malondialdehyde level in Z.japonica under nutrient heterogeneity.The results indicated that parent ramets treated with moderate or high nutrient concentrations had significantly increased the activities of SOD and CAT,and reduced MDA level in connected daughter ramets under nutrient heterogeneity.Contrastingly,daughter ramets treated with moderate or high nutrient concentrations exerted no influence on antioxidant enzyme activity and malondialdehyde level in connected parent ramets.There existed a physiological integration from parent ramets to daughter ramets,and daughter ramets benefited from parent ramets under nutrient heterogeneity;however,parent ramets did not benefit from daughter ramets.Daughter ramets were the unidirectional beneficiaries of the physiological integration.