植物色素在24-表油菜素内酯调节油菜耐盐性中的作用(英文)

被引：9

作者：

刘金隆 ^{[1
]}

高会玲 ^{[1
]}

洪立洲 ^{[2
]}

王长海 ^{[1
]}

赵耕毛 ^{[1
]}

王雪莹 ^{[1
]}

郑青松 ^{[1
]}

机构：

[1] 南京农业大学资源与环境科学学院江苏省海洋生物学重点实验室

[2] 江苏沿海地区农业科学研究所

来源：

西北植物学报 | 2013年 / 33卷 / 01期

关键词：

抗氧化能力; 油菜幼苗; 24-表油菜素内酯; 植物色素; 耐盐性;

D O I：

暂无

中图分类号：

S565.4 [油菜籽（芸薹）]; Q946 [植物生物化学];

学科分类号：

0901 ; 071001 ;

摘要：

为了探索24-表油菜素内酯(24-EBL)对盐胁迫下油菜生长的调节效应和植物色素在油菜耐盐性中的作用,采用盆栽实验,在盐胁迫下外源喷施1 000、10、0.1、0.001nmol.L-1 24-EBL处理油菜幼苗,测定植株的生物量、电解质渗漏率(ELP)、净光合速率(Pn)、光合色素、酚类、类黄酮、花青素含量以及抗氧化能力(T-AOC)。结果显示:(1)24-EBL可显著缓解盐胁迫对油菜幼苗的氧化伤害,提高盐渍下油菜幼苗Pn和光合色素含量,并以0.1nmol.L-1 24-EBL(EBL3)对生长的调控效应最佳。(2)盐胁迫下,植株不同部位叶片的β-胡萝卜素(β-Car)和叶黄素(Lut)含量均显著下降,EBL3处理可显著提高其上部叶的β-Car含量,以及上部和中部叶的Lut含量;EBL3处理可显著提高盐胁迫下油菜所有叶片和叶柄的酚类含量,以及叶柄中类黄酮含量;EBL3处理可显著提高盐胁迫下油菜幼苗所有器官的花青素含量。(3)EBL3仅能够诱导上部叶和中部叶类胡萝卜素(Car)提取液的抗氧化能力(T-AOC)提高,但可诱导植株所有器官的酚类提取液的T-AOC提高。(4)不同部位的叶片Car、β-Car和Lut含量均与其Car提取液的T-AOC呈极显著正相关;而上部叶的总酚和花青素含量、中部叶和叶柄的花青素含量及茎秆中总酚、类黄酮和花青素含量与各自的酚类提取液的T-AOC呈极显著正相关。研究表明,外源喷施适宜浓度的24-EBL能够显著促进盐渍条件下油菜幼苗的光合能力,提高其抗氧化能力,从而增强其对盐渍胁迫的适应性,而光合色素和花青素水平被24-EBL诱导上升在油菜幼苗抗氧化过程中起着重要的作用。

引用

页码：90 / 100

页数：11

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