Water stress-mediated changes in antioxidant enzyme activities of mulberry (Morus alba L.)

A. R. Reddy, K. Chaitanya, D. Sundar
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引用次数: 23

Abstract

Waters stress-induced responses in the activities of superoxide dismutase (SOD), catalase (CAT), ascrobate peroxidase (APX) and peroxidase (POD) from three different genotypes (K-2, MR-2 and BC2-59) of mulberry (Morus alba L.) were determined. In response to water deficit, increases in the activities of SOD, CAT, APX and POD were observed in all the three genotypes. Progressive increase in the activities of the antioxidant enzymes was observed with decreasing leaf water potentials from -0.75 MPa to -2.25 MPa. However BC2-59 showed significantly higher activities of all the three antioxidant enzymes under low water regimes compared to those from K-2 and MR-2. The results clearly suggest that low leaf water potentials induce the antioxidant enzymes in all the three genotypes of mulberry. Our data indicate that the genotype BC2-59 has efficient antioxidant system among the three cultivars which could protect the oxidative damage caused due to water limited conditions.
水分胁迫对桑树抗氧化酶活性的影响
测定了3种不同基因型(K-2、MR-2和BC2-59)桑树超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)和过氧化物酶(POD)活性对水分胁迫的响应。水分亏缺后,三种基因型的SOD、CAT、APX和POD活性均升高。随着叶片水势从-0.75 MPa降至-2.25 MPa,抗氧化酶活性逐渐增加。在低水条件下,BC2-59的3种抗氧化酶活性均显著高于K-2和MR-2。结果表明,低叶片水势对3个基因型桑树抗氧化酶均有诱导作用。结果表明,基因型BC2-59在3个品种中具有有效的抗氧化系统,可以保护水分限制造成的氧化损伤。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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