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【目的】在水分胁迫及复水条件下,研究3份新疆狗牙根新品系叶片活性酶的变化。【方法】测定3份新疆狗牙根新品系叶片的超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的活性变化。【结果】3份新疆狗牙根新品系超氧化物歧化酶(SOD)活性持续升高,过氧化物酶(POD)活性先升高后降低,过氧化氢酶(CAT)活性在胁迫前期(3~30 d)变化平缓,而随后持续升高,复水后呈降低的变化趋势。【结论】虽然干旱胁迫会导致3份新疆狗牙根新品系内形成较多自由基,使细胞膜系统受到一定破坏,但3份新疆狗牙根新品系体内的保护酶防御系统可以被有效调动以清除和防御自由基的伤害,从而保护细胞免受更大的损伤。
【Objective】 Under the conditions of water stress and rehydration, the changes of active enzyme in leaves of 3 new bermudagrass strains of Xinjiang were studied. 【Method】 The activity changes of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in 3 new leaves of Bermudagrass of Xinjiang were measured. 【Result】 The results showed that the activities of superoxide dismutase (SOD) in three new bermudagrass strains increased continuously and then decreased, while the activity of peroxidase (POD) ~ 30 d) changes gently, and then continued to rise, rehydration showed a downward trend. 【Conclusion】 Although drought stress could cause more free radicals to form in the new bermudagrass strains, the cell membrane system was damaged to some extent. However, the protective enzyme defense system in three new bermudagrass strains could be effectively mobilized to eliminate Defense of free radical damage, thereby protecting cells from greater damage.