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首页> 外文会议>Conference on key technology of horticulture >Effects of Short-time Low Night Temperature on Proline Content, Lipid Peroxidation and Antioxidative Enzymes Activities in Different Genotypes Tomatoes
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Effects of Short-time Low Night Temperature on Proline Content, Lipid Peroxidation and Antioxidative Enzymes Activities in Different Genotypes Tomatoes

机译：短时夜间低温对不同基因型番茄脯氨酸含量，脂质过氧化和抗氧化酶活性的影响

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摘要

The effects of short-time low night temperature on proline, malondialdehyde ( MDA ) content and antioxidative enzymes were studied in wild tomato LA 1777 ( Solanum habrochaites ) and cv. Moneymaker ( S. lycopersicum) leaves. Seedlings with six fully expanded true leaves were moved in different climatic controlled-environment chambers where dayight temperature regimes were 25/15°C, 25/9 °C and 25/6 °C for 12h, respectively. The results showed that proline content and POD activity increased at 9°C and 6°C in two genotypes. The variation range of proline content and POD activities in LAI777 was greater than in Moneymaker; SOD activities at 9°C and 6°C in LA 1777 decreased during the first 9h and then increased, but increased in Moneymaker than control level after low night temperature treated; CAT activities changed slightly in two genotypes under low temperature. The increased content of MDA in leaves of Moneymaker was more than in LA 1777, indicating the enhanced membrane lipid peroxidation in Moneymaker. Therefore, the coldresistant tomato might depend on exerted higher level of POD activity and proline content to acclimate to chilling stress.
机译：研究了短期夜间低温对野生番茄LA 1777（solanum habrochaites）和简历中脯氨酸，丙二醛（MDA）含量和抗氧化酶的影响。赚钱者（S. lycopersicum）离开。将具有六张完全展开的真叶的幼苗移至不同的气候控制环境箱中，白天/晚上的温度分别为25/15°C，25/9°C和25/6°C，持续12h。结果表明，两种基因型在9°C和6°C时脯氨酸含量和POD活性均增加。 LAI777中脯氨酸含量和POD活性的变化范围大于Moneymaker; LA 1777的9°C和6°C的SOD活性在开始的9h内下降，然后增加，但经过低温处理后，Moneymaker中的SOD活性高于对照水平;在低温下，两种基因型的CAT活性略有变化。 Moneymaker叶片中MDA含量的增加高于LA 1777中的含量，表明Moneymaker中膜脂质过氧化作用增强。因此，耐寒番茄可能要依靠发挥更高水平的POD活性和脯氨酸含量来适应寒冷胁迫。

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