摘要
为明确油菜素内酯(Brassinosteroid,BR)对Ca2+信使系统的影响及提高玉米抗病性的关系,为阐明BR提高玉米抗病性的机理提供理论依据。以玉米品种浚单20为材料,研究了BR处理后对玉米幼苗细胞中Ca2+分布的影响和玉米叶片对层出镰孢菌的抗性的变化情况。结果发现:BR处理后感病的叶鞘数目减少,病斑面积减小,细胞壁中Ca2+分布明显减少,细胞间隙中Ca2+分布明显增加,使得受侵染的部位比健康组织有更强的抗软化能力,抑制真菌的进一步侵染。
In this study,we adopted maize variety Jundan 20 to explore the effect of Brassinosteroid （BR） treat-ment on Ca2＋distribution in maize seedling cells and resistance change of maize leaf against Fusarium proliferatum, aiming to verify the influence of BR on Ca 2＋messenger system and its correlation with the enhancement of disease resistancein maize ,thus providing the theoretical basis for illuminating the mechanism of BR in enhancing disease resistance of maize .The results showed that the number of disease infected sheath decreased after BR treatment a-long with shrunken lesion area ,significant decrease of Ca 2＋distribution in cell wall and obvious increase of Ca 2＋distribution in intercellular space .In this way,the infected area will be more capable to resist softening compared with healthy tissues ,and further fungus infection will be inhibited .
出处
《华北农学报》
CSCD
北大核心
2014年第4期151-154,共4页
Acta Agriculturae Boreali-Sinica
基金
河北省自然科学基金项目(C2013204106)
河北省高等教育教学改革研究项目(2012GJJG058)
