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为探讨在干旱胁迫下,复水的缓解效应及机制,本试验以玉米哲单为试材,在苗期进行干旱胁迫处理。由预实验可知浇水/3 d为周期玉米苗期生长状态最好,因此以浇水/3 d为对照组(CK),其他三组分别为浇水/5 d(T1)、浇水/7 d(T2)、浇水/9 d(T3),胁迫四周后进行形态及生理生化指标的测定。之后进行复水,三周后再次测定形态及生理生化指标。结果表明:(1)随着干旱胁迫天数的增加,植株高度、叶片长度、叶片宽度和叶绿素含量逐渐降低,即CK>T1>T2(p<0.01)>T3(p<0.01);(2)脯氨酸含量、可溶性糖含量、丙二醛含量和相对电导率含量随胁迫天数增加逐渐增加:即CK0.05)。
In order to explore the mitigation effect and mechanism of rewatering under drought stress, the experiment was conducted with Zea mays as test material and drought stress treatment at seedling stage. According to the preliminary experiment, we can see that watering / 3 d cycle is the best in corn seedling stage, so watering / 3 d is the control group (CK). The other three groups are watering / 5 d (T1) 7 d (T2), watering / 9 d (T3). The morphological and physiological and biochemical indexes were measured after four weeks of stress. After rehydration, three weeks after the determination of morphological and physiological and biochemical indicators. The results showed as follows: (1) The plant height, leaf length, leaf width and chlorophyll content gradually decreased with the increase of days of drought stress, ie CK> T1> T2 (p <0.01)> T3 Proline content, soluble sugar content, MDA content and relative conductivity increased gradually with the increase of stress days: CK 0.05).