水稻品种抗瘟性诱导研究Ⅰ.非生物诱导物的筛选及诱导方法初探

 采用经反复筛选的化学药剂亚硒酸钠、放线菌酮、氯化钾、硫酸锰和中药材前胡、白芷的提取液浸泡水稻种子或进行叶面喷雾,可诱导稻株产生对稻瘟病的抗性。在人工喷雾接种条件下,对感病品种抗叶瘟的诱导效果为43%~93%;在注射接种条件下,抗穗瘟的诱导效果为29%~78%。供试药剂对感病品种和弱致病菌株的诱导效果优于对抗病品种和强致病菌株;药液叶面喷雾的诱导效果优于药液浸种。

ON THE INDUCED RESISTANCE OF RICE VARIETIES TO BLAST DISEASE I. SCREENING OF INDUCERS AND METHODS

Resistance could be induced to blast disease on rice plants by using seed soaking or leaf spraying method of liquids of Na₂SiO₃, Cycloheximide, KC1, MnSO₄ and extractsd of the root of Purple-flowered peucedanum (Pevcedanum decursivum) and Dahnrian angelica (traditional chineses medicine). With spraying method of inoculation, the indices of resistance effect on susceptible varieties to leaf blast was 43%~93%, while to neck blast by injection inoculation was 29%~78%. It is evident that the inducing effect was higher on susceptible varieties of rice and with avirulent strains of pathogen than those on resistant varieties and with virulent strains of pathogen. The indices of inducing resistance were also higher in the case with virulent strains and leaf spraying inoculation than in that of soaking seed with drug extract.