大叶草抗氧化及其他生化防御反应Verdc。(马革)由高温和盐胁迫引起

Khalid Mohammed Naji, V. R. Devaraj
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引用次数: 19

摘要

高温和高盐度是挑战世界干旱和半干旱地区作物生产力的主要生态因素。高温(43 ~ 45℃)和盐胁迫(0.6 M)对单花巨叶草(Macrotyloma uniflorum)的影响Verdc。在抗氧化剂和抗氧化酶方面进行了评价。这两种处理都引起了典型的应激反应。氧化应激指标如H2O2、TBARS、脯氨酸显著升高。同样,抗氧化酶超氧化物歧化酶(SOD;EC 1.15.1.1),愈创木酚过氧化物酶(POX;EC 1.11.1.7)和酸性磷酸盐(AP;EC 3.1.3.2)显著升高,过氧化氢酶(CAT;EC 1.11.1.6)降低。这些处理对谷胱甘肽还原酶(GR;EC1.6.4.2)和β-淀粉酶(EC 3.2.1.1)。温度胁迫导致GR升高,β-淀粉酶降低,盐胁迫则相反。抗坏血酸和谷胱甘肽在温度胁迫下升高,在盐胁迫下降低。SDS-PAGE分析显示温度和盐胁迫下幼苗的蛋白质谱完全不同。生长率和鲜质量受影响程度与对照相同。综上所述,这些数据描述了马克兰对高温和盐度的关键生化反应的相似性和特殊性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Antioxidant and other biochemical defense responses of Macrotyloma uniflorum (Lam.) Verdc. (Horse gram) induced by high temperature and salt stress
High temperature and salinity are the major ecological factors challenging crop productivity in the arid and semiarid regions of the world. Effects of high temperature (43-45°C) and salt stress (0.6 M) on Macrotyloma uniflorum (Lam.) Verdc. (Horse gram), were evaluated in terms of antioxidants and antioxidant enzymes. Both treatments caused typical stress responses in this tropical leguminosae. Oxidative stress indicators such as H2O2, TBARS, and proline were significantly elevated. Similarly, the antioxidant enzymes superoxide dismutase (SOD; EC 1.15.1.1), guaiacol peroxidase (POX; EC 1.11.1.7) and acid phosphates (AP; EC 3.1.3.2) were significantly elevated while catalase (CAT; EC 1.11.1.6) was reduced. These treatments had contrasting effects on glutathione reductase (GR; EC1.6.4.2) and β-amylase (EC 3.2.1.1). While temperature stress caused increase in GR and decrease in β-amylase, salt stress caused a counter effect. Contrast was also observed in ascorbate and glutathione which increased in temperature stress and reduced in salt stress. SDS-PAGE analysis indicated entirely different protein profiles in temperature and salt stressed seedlings. Growth rate and fresh mass were affected to same extent, relative to their controls. Taken together these data describes the similarities and peculiarities of key biochemical responses of Horse gram to high temperatures and salinity.
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