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利用同位素示踪技术研究了不同抗性的水稻品种~(14)C同化物在叶片中的累积与抗病病斑扩展的关系。穗期,~(14)C同化物在IR_(26)(抗病品种)接种剑叶中的累积率高于金刚30(感病品种)。去穗处理后,IR_(26)和金刚30接种剑叶~(14)C同化物绝大部分存留于叶片自身,输出减少;其中接种后10天,金刚30接种剑叶病斑长度明显缩短,表明去穗处理增加~(14)C同化物的累积,有利于抑制病斑的扩展。穗期,IR_(26)的倒3叶~(14)C同化物输出率高于金刚30,倒3叶向接种剑叶的~(14)C同化物输入率也高于金钢30;去穗处理后,金刚30的倒3叶~(14)C同化物输出率增高。
Using isotope tracing technique, the relationship between the accumulation of ~ (14) C assimilates and the expansion of resistant disease spots in different resistant rice varieties was studied. At the heading stage, the accumulation rate of ~ (14) C assimilates in flag leaf of IR 26 (resistant variety) was higher than that in Vajra 30 (susceptible variety). After spike treatment, most of the isolates from the leaves of IR_ (26) and Kongnong 30 inoculated with the leaves remained in the leaves themselves, and the output decreased. In the 10 days after inoculation, the length of diseased leaves of Vaccinium euchromaucosus 30 was significantly shortened, Show spike treatment increase ~ (14) C assimilate accumulation, is conducive to inhibiting the expansion of lesion. In the heading stage, the output of the third leaf ~ (14) C assimilate of IR 26 was higher than that of Vajra 30, and the input rate of ~ (14) C assimilate of the third leaf to the inoculated leaf was also higher than that of Jingang 30 After spike treatment, the output of the third leaf ~ (14) C assimilate of diamond 30 increased.