水杨酸包衣剂包衣棉种对棉花幼苗抗寒性的影响  

Effects of the Seed Film Coating Salicylic Acid on the Chilling Tolerance of Cotton Seedlings

作　　者：李防洲 辛慧慧[1] 周广威[1] 李哲[1] 侯振安[1] 冶军[1] 

机构地区：[1]石河子大学农学院/新疆生产建设兵团绿洲生态农业重点实验室,石河子832003

出　　处：《棉花学报》2015年第6期589-594,共6页Cotton Science

基　　金：国家科技支撑计划"低温灾害防控关键技术研究与应用"(2012BAD20B03)

摘　　要：通过室内砂培试验,研究了不同浓度水杨酸包衣剂包衣棉种对棉花幼苗抗寒性的影响,分析了棉花幼苗低温胁迫前后以及恢复常温叶片细胞膜透性、抗氧化物酶及渗透调节物质对水杨酸包衣剂包衣的生理响应。结果表明：1~10 mmol·L-1的水杨酸包衣剂包衣处理,能有效减轻低温对棉花幼苗的伤害。棉花幼苗叶片的相对电导率（REC）和丙二醛（MDA）的积累量显著降低,超氧化物歧化酶（SOD）、过氧化物酶（POD）、过氧化氢酶（CAT）等抗氧化保护酶的活性显著增强,可溶性蛋白、可溶性糖、游离脯氨酸等渗透调节物质的含量显著提高。说明水杨酸包衣剂包衣处理能缓解低温胁迫对幼苗生长的抑制,提高棉花幼苗的抗寒性,并以5 mmol·L-1的水杨酸包衣效果最好。The objective of this study was to investigate the effect of the different concentrations of the seed film coating salicylic acid on the cold tolerance of cotton seedlings using the sand culture method. The physiological response of cell membrane permeability, protective enzyme activity and osmotic adjustment of cotton seedling were measured before and after at low temperature stress and at normal temperature. The results showed that 1-10 mmol·L-1of seed film coating with salicylic acid seed coating treatment could effectively alleviate damage to cotton seedlings at low temperature, and the accumulation of the relative electrical conductivity and malondialdehyde were reduced on cotton seedlings. The activity of superoxide dismutase, peroxidase,catalase, and soluble protein, soluble sugar and proline contents increased sharply. These results indicate that film coating with salicylic acid can alleviate the effects of low temperature stress on seedling growth inhibition and improve the cotton seedlings by providing chilling tolerance, and the optimum treatment concentration salicylic acid is 5 mmol·L-1.

关 键 词：水杨酸 包衣剂 棉花幼苗 低温胁迫 抗寒性 

分 类 号：S562[农业科学—作物学]