【摘要】 利用大型防雨棚进行人工控水,研究春旱、伏旱和持续轻度干旱胁迫对烤烟三大保护酶活性的影响。结果表明,在各种干旱胁迫下,随着胁迫时间的持续,超氧化物歧化酶(SOD)活性呈先增加后降低的趋势;春旱、持续干旱胁迫下过氧化物酶(POD)和过氧化氢酶(CAT)活性呈"增加-降低-增加"的趋势,而伏旱胁迫处理POD和CAT活性则呈先增加后降低的趋势。3种处理中,伏旱处理对三大保护酶活性影响最大。更多还原

【Abstract】 Using large waterproof installations to regulate different soil water contents strictly, we studied effects of spring drought, summer drought and sustained mild drought on the activity of cell defense enzymes in flue-cured tobacco leaves. The results indicated that the superoxide dismutase (SOD) activity increased first and then declined under all kinds of drought stress, the activity of peroxdase (POD) and catalase (CAT) showed a trend of increasing-declining-increasing under spring drought and sustained mild drought, while increasing first and then declining under summer drought. The activity of cell defense enzymes was most affected by summer drought during three treatments.更多还原