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以番茄为材料 ,研究了不同氮素形态和光照强度对植株生长及抗氧化酶活性的影响 ,实验表明 ,与供应 NO3 -的植株相比 ,较高光照下供应 NH4 + 的植株生长受到抑制 ,叶片单位鲜重叶绿素含量明显降低 ,超氧自由基 (O·2 )产生速率、H2 O2 含量、丙二醛 (MDA)含量以及超氧化物歧化酶 (SOD)、抗坏血酸过氧化物酶 (As A- POD)、脱氢抗坏血酸还原酶 (DR)、谷胱甘肽还原酶 (GR)等抗氧化酶活性均显著高于供应 NO3 -的植株 ,而在弱光下 ,上述各指标在氮素形态之间均无明显差异 .
The effects of different nitrogen forms and light intensities on plant growth and antioxidant enzyme activity were studied using tomato as experimental material. The results showed that compared with plants supplied with NO3 -, the growth of plants supplied with NH4 + under high light was inhibited, The fresh weight per unit leaf chlorophyll content was significantly decreased, the production rate of O2 radical, the content of H2 O2, the content of malondialdehyde (MDA) and the content of superoxide dismutase (SOD) and ascorbate peroxidase (As A - POD, DR and DR) were significantly higher than that of NO3 - supplying plants, while in low light, No significant difference between the.