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标题：Proline, glycine betaine, total phenolics and pigment contents in response to osmotic stress in maize seedlings
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作者：SAJJAD MOHARRAMNEJAD ; OMID SOFALIAN ; MOSTAFA VALIZADEH 等
期刊名称：Journal of BioScience and Biotechnology
印刷版ISSN：1314-6238
电子版ISSN：1314-6246
出版年度：2015
卷号：4
期号：3
页码：313-319
出版社：Plovdiv University Press
摘要：In order to evaluate the fresh weight, RWC, pigment content, total phenolics, proline and glycine betaine responses of maize inbred lines to osmotic stress, a factorial experiment was carried out under laboratory conditions with two maize inbred lines (B73 and MO17) and two osmotic stress levels induced by PEG (control and -0.6 MPa). Fresh weight significantly decreased under drought stress. On the basis of percent inhibition in fresh weight at the osmotic stress MO17 was ranked as tolerant (inhibition 45.30%), and B73 drought sensitive (inhibition more than 50%). Leaf relative water content (RWC) was significantly decreased in both inbred lines under osmotic stress. The pigment concentrations were substantially declined in both maize inbreds under osmotic stressed conditions. However, this reduction was less in B73 than MO17. Osmoitc stress declined the levels of total phenolics in both maize inbreds. On the other hand, the osmotic stress markedly enhanced the levels of proline and glycine betaine in both maize inbreds, but this was more pronounced in MO17. The present results showed that osmotic stress retards the growth and some biochemical attributes of maize inbreds. In conclusion, the level of proline and glycine betaine in maize could improve drought tolerance
关键词：drought stress; glycine betaine; maize; pigment content; proline