Studies on the Pathological Anatomy of Rice Plants Infected by <i>Cochliobolus miyabeanus</i>

DOI DOI Open Access
  • HORINO Osamu
    Faculty of Medical School, Gifu University Tokai-kinki Agricultural Experiment Station
  • AKAI Shigeyasu
    Faculty of Agriculture, Kyoto University

Bibliographic Information

Other Title
  • イネごま葉枯病に関する病理解剖学的研究
  • IV. Ultrastructural changes of chloroplasts due to the infection
  • IV. 感染による葉緑体の微細構造変化

Description

In the present paper fine structures of chloroplasts in cells of rice plants and their ultrastructural changes due to the infection of Cochliobolus miyabeanus were described.<br>In a longisection of healthy leaves of rice plants, chloroplasts were enveloped with a double membrane, and the lamellar system in chloroplasts showed a distinct compartmented grana stacks.<br>Fifty hours after the inoculation of this fungus, chloroplasts in cells swelled about 1.5-2 times, and they were oblong to spherical in shape, having partially disintegrated double membrane of the envelope. The outermost sac of grana stacks of chloroplasts was firstly swollen into vesicle-like structure, with no matrix detectable in the interior. In chloroplasts adjacent to hyphae the disintegration of lamellar system may first take place in the grana stacks near the envelope. It gradually spread to every stack of grana and finally they degenerated entirely, forming abundant small vesicles, 0.1-0.5μ in diameter.

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