イネ白葉枯病の病態生理に関する研究 : III. ^<14>C-光合成産物の病斑部への集積

概要

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Accumulation of ^<14>C-photosynthetic assimilates in rice leaves infected with Xanthomonas campestris pv. oryzae was studied by using autoradiography for the purpose of elucidating the movement of nutrients from healthy tissues to the infected parts. When rice plants were exposed to ^<14>CO_2 immediately after inoculation, ^<14>C-photosynthetic assimilates did not accumulate in and around the inoculated spots of leaves until the lesions became visible, i. e., approximately 7 days after inoculation. When the leaves were exposed to ^<14>CO_2 before visible lesions appeared, 2 and 5 days after inoculation, the assimilates did not accumulate in the inoculated areas, but apparently accumulated in the lesions 24 hr later on from the exposure of leaves with visible lesions. In the newly formed lesions, accumulation site corresponded to the yellow streak parts of lesions along leaf veins. In the large and old lesions, assimilates hardly any accumulated in the center of lesions, grayish-white in color, but accumulated in the border parts of lesions adjacent to healthy tissues which are developing and yellow streak in symptoms.
日本植物病理学会の論文
1980-12-25