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无论是土壤长期缺水,还是短期缺水,都使小麦叶片游离脯氨酸含量明显增高。短期土壤缺水处理,随叶片失水而呈中度水分胁迫时,抗旱性较弱的济南13号游离脯氨酸累积高于抗旱性较强的鲁麦1号;严重水分胁迫时则相反。叶片相对含水量与游离脯氨酸含量的回归分析表明,二者为显著的负相关,在叶片相对含水量相同的情况下,抗旱性较强的鲁麦1号比抗旱性较弱的济南13号累积更多的游离脯氨酸。
Whether long-term water shortage in soil or short-term water shortage, the content of free proline in wheat leaves significantly increased. Short-term soil water deficit treatment showed moderate water stress with water loss of leaves, and the accumulation of free proline of Jinan 13 with weaker drought resistance was higher than that of Lumai 1 with stronger drought resistance, while the opposite when severe water stress. The regression analysis of leaf relative water content and free proline content showed that there was a significant negative correlation between them. Under the condition of the same relative water content of leaves, the stronger drought resistance Lumai 1 than the drought resistance Jinan 13 Accumulate more free proline.