Alleviating the adverse effects of NaCl stress in maize seedlings by pretreating seeds with salicylic acid and 24-epibrassinolide
Alleviating the adverse effects of NaCl stress in maize seedlings by pretreating seeds with salicylic acid and 24-epibrassinolide
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DOI：
10.1016/j.sajb.2013.07.019
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发表时间：
2013-09-01
影响因子：
3.1
通讯作者：
Agami, Ramadan A.
中科院分区：
文献类型：
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作者：
Agami, Ramadan A.
研究了生物调节剂水杨酸(SA)和24-表油菜素内酯(EBL)浸种处理对60 mM和120 mM盐胁迫下玉米幼苗生长特性、光合色素含量、脯氨酸含量、相对含水量(RWC)、电解质渗漏率(EC%)、抗氧化酶活性和叶片解剖的影响。温室试验采用完全随机设计，共设9个处理[对照(自来水处理)；60 mM氯化钠：120 mM氯化钠；10(-4)M水杨酸；60 mM氯化钠+10(-4)M水杨酸；120 mM氯化钠+10(-4)M水杨酸；10亩湿润土层；60 mM氯化钠+10亩湿润土或120 mM氯化钠+10亩土壤土，每个处理设4个重复。结果表明，盐胁迫显著降低了植株生长性状、叶片光合色素、可溶性糖、相对含水量、过氧化氢酶(CAT)、过氧化物酶(POX)活性以及叶片解剖结构。但SA和EBL的应用减轻了盐胁迫对玉米幼苗的毒害，显著改善了玉米幼苗的生长性状、光合色素、Pro、RWC%、CAT和POX酶活性以及叶片解剖结构。这项研究强调了SA或EBL在减轻种子和生长幼苗中盐胁迫的植物毒性方面的潜在改善作用。(C)2013年萨博。爱思唯尔出版，版权所有。
The effects of bio-regulators salicylic acid (SA) and 24-epibrassinolide (EBL) as seed soaking treatment on the growth traits, content of photosynthetic pigments, proline, relative water content (RWC), electrolyte leakage percent (EC%), antioxidative enzymes and leaf anatomy of Zea mays L. seedlings grown under 60 or 120 mM NaCl saline stress were studied. A greenhouse experiment was performed in a completely randomized design with nine treatments [control (treated with tap water); 60 mM NaCl: 120 mM NaCl; 10(-4) M SA; 60 mM NaCl + 10(-4) M SA; 120 mM NaCl + 10(-4) M SA; 10 mu M EBL; 60 mM NaCl + 10 mu MEBL or 120 mM NaCl + 10 mu M EBLJ each with four replicates. The results indicated that NaCl stress significantly reduced plant growth traits, leaf photosynthetic pigment, soluble sugars, RWC%, and activities of catalase (CAT), peroxidase (POX) as well as leaf anatomy. However, the application of SA or EBL mitigated the toxic effects of NaCl stress on maize seedlings and considerably improved growth traits, photosynthetic pigments, proline, RWC%, CAT and POX enzyme activities as well as leaf anatomy. This study highlights the potential ameliorative effects of SA or EBL in mitigating the phytotoxicity of NaCl stress in seeds and growing seedlings. (C) 2013 SAAB. Published by Elsevier B.V. All rights reserved.