| 曲东,邵丽丽,王保莉,周莉娜.干旱胁迫下硫对玉米叶绿素及MDA含量的影响[J].干旱地区农业研究,2004,(2):91~94 |
| 干旱胁迫下硫对玉米叶绿素及MDA含量的影响 |
| Effects of sulfur nutrition on chlorophyll and MDA of maize under drought stress |
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| DOI：10.7606/j.issn.1000-7601.2004.02.19 |
| 中文关键词: 干旱胁迫 硫 MDA 叶绿素 |
| 英文关键词:drought stress, sulphur MDA, chlorophyll |
| 基金项目:黄土高原土壤侵蚀与旱地农业国家重点实验室基金(10501-121) |
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| 摘要点击次数: 43 |
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| 中文摘要: |
| 以高水肥型玉米品种为供试作物,选用4种不同硫浓度的Hoagland营养液进行培养试验,以PEG-6000模拟干旱胁迫,测定了三叶期后玉米功能叶片中叶绿素、丙二醛MDA含量的变化。结果表明:增加硫营养供应对提高叶片中叶绿素含量具有非常重要的作用。随着营养液中硫浓度的增加,功能叶片中叶绿素含量有明显的提高,并且硫营养对叶绿素含量的影响可能存在一个浓度阈值;干旱可明显导致叶绿素含量的降低,但随着营养液中硫浓度的增加,对功能叶片中叶绿素含量的降低有明显的抑制作用;在复水过程中硫营养表现出明显的效应,其叶绿素含量会得到不同程度的恢复;干旱胁迫可导致叶片中MDA含量增加,但有硫处理的玉米叶片MDA含量显著低于无硫处理,表明硫营养能减轻干旱造成的膜伤害。 |
| 英文摘要: |
| The changes of chlorophyll and MDA content in the functional leaves of ombrophilous maize cultivars, which was grown in the Hoagland Nutrients with different S concentration, have been measured after the 3-leaf period under drought stress which was stimulated by using PEG-6000. The results show that the S supply play an important role in increasing the content of chlorophyll. With the increase of S concentration in the Nutrients, the content of chlorophyll in the funtional leaves is raised, and most probably there exists a concentration threshold; Drought stress clearly causes the decrease of the chlorophyll, however, this effect may be inhibited by increasing S in the Nutrients; The chlorophyll content can be recovered to some extend after rewatering, which is evidently affected by S nutrition; Drought stress causes the increase of MDA in leaves, but the MDA content in the plants with S nutrition is obviously lower than that without S, showing that S may have a function in lightening the membrane damage caused by drought. |
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