外源SA对甜菜幼苗细胞壁HRGP和木质素含量的影响  

The Effects of HRGP and Lignin Content of Cell Wall by Exogenous Salicylic Acid on Sugar Beet

作　　者：陈贵华[1] 张少英[1] 

机构地区：[1]内蒙古农业大学农学院,内蒙古呼和浩特010019

出　　处：《作物杂志》2012年第2期36-38,共3页Crops

基　　金：国家自然科学基金(30760125);现代农业产业技术体系建设专项资金(CARS-03-04);博士启动基金(BJ09-13)

摘　　要：甜菜丛根病(Rhizomania)是甜菜生产中的毁灭性病害,细胞壁在抗病过程中起重要的保护作用,本研究以5mmol/L水杨酸(SA)处理甜菜幼苗,研究外源SA对细胞壁中羟脯氨酸糖蛋白(HRGP)和木质素含量的影响。研究结果表明,SA提高了甜菜幼苗细胞壁中HRGP含量,提高幼苗苯丙氨酸解氨酶(PAL)和过氧化物酶(POD)活性,细胞壁木质素含量增加,说明外源SA作为信号分子,可调控甜菜细胞壁中的防御系统,提高抗病性。Rhizomania is the most serious disease for sugar beet, and cell wall plays an important protection in resistance to the disease. The effect of external SA on HRGP and lignin content in cell wall of sugar beet seedlings were studied by treating 30d sugar beet seedlings with 5mmol/L SA. The results showed that SA increased PAL activity and POD activity of the seedlings ; HRGP and lignin content were also increased by external SA. This indicated that the exogenous SA is an important signaling molecule which regulates the defense system and improves the disease resistance.

关 键 词：甜菜 细胞壁 水杨酸 抗病性 

分 类 号：S566.3[农业科学—作物学]