CAJ | 학술논문

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。
위명학유채소내지（Brassinosteroid，BR）대Ca2＋신사계통적영향급제고옥미항병성적관계，위천명BR제고옥미항병성적궤리제공이론의거。이옥미품충준단20위재료，연구료BR처리후대옥미유묘세포중Ca2＋분포적영향화옥미협편대층출렴포균적항성적변화정황。결과발현：BR처리후감병적협초수목감소，병반면적감소，세포벽중Ca2＋분포명현감소，세포간극중Ca2＋분포명현증가，사득수침염적부위비건강조직유경강적항연화능력，억제진균적진일보침염。
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 .