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요약정보
外源壳寡糖对低温胁迫条件下烟草幼苗的保护作用
Resource Type
Academic Journal
Authors
陈芊如
;
丁蓬勃
;
胡希好
;
赵福彬
;
邰振益
;
赵忠利
;
刘宗霞
;
李义强
;
邹平
Source
江苏农业科学 / Jiangsu Agricultural Sciences
. 50(1):80-85
Subject
壳寡糖;低温胁迫;烟草;渗透调节;抗氧化活性
Language
Chinese
ISSN
1002-1302
Online Access
Find it @ DONGA
초록
持续低温容易使烟草幼苗萎蔫或早花,影响烟叶产量.以低温敏感的雪茄烟资源H382为试验材料,研究在长时间低温条件下,叶面喷施不同浓度壳寡糖溶液,其幼苗在低温抗性方面产生的生理变化.结果表明,在低温胁迫下,烟草幼苗遭受渗透胁迫和氧化胁迫,生长受到抑制.施用外源壳寡糖能够显著降低烟草幼苗叶片中活性氧(ROS)、丙二醛(MDA)含量,增强烟草叶片中抗氧化酶活性,同时,还能够显著提高烟草幼苗叶片中渗透调节物质的含量.试验结果表明,外源壳寡糖能够抑制低温条件下烟叶中产生活性氧,并能降低膜脂过氧化水平,提高烟草幼苗渗透调节能力和抗氧化活性,从而增强其抵抗低温胁迫的能力.其中100 mg/L壳寡糖对低温胁迫下烟草幼苗的缓解效果最强,本研究结果可为缓解早春低温胁迫对烟草幼苗的伤害提供理论依据和解决途径.
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