Invasion and colonization pattern of Fusarium fujikuroi in rice

Phytopathology
Chieh-Yi ChenChia-Lin Chung

Abstract

Bakanae disease in rice can cause abnormal elongation of the stem and leaves, development of adventitious roots, a larger leaf angle, and even death. Little is known about the infection, colonization, and distribution of Fusarium fujikuroi in rice plants across different growth stages. In this study, microscopic observation and quantitative real-time PCR were combined to investigate the pathogenesis of bakanae, using artificially inoculated seedlings of a susceptible rice cultivar, Zerawchanica karatals (ZK), a resistant cultivar, Tainung 67 (TNG67), naturally infected adult field plants (cultivars Kaohsiung 139, Taikeng 2, and Tainan 11), and a F. fujikuroi isolate expressing green fluorescent protein. In rice seedlings, F. fujikuroi hyphae were found to directly penetrate the epidermis of basal stems and roots, then extend inter- and intracellularly to invade the vascular bundles. Occlusion of vascular bundles and radial hyphal expansion from vascular bundles to surrounding parenchyma were observed in adult plants. Analysis of consecutive 3-cm segments of the whole plant revealed that F. fujikuroi was largely confined to the embryo, basal stem, and basal roots in seedlings, and distributed unevenly in the lower aerial parts (...Continue Reading

References

Mar 4, 2000·Applied and Environmental Microbiology·A E DesjardinsC M Maragos
Jul 30, 2011·BMC Plant Biology·Marike J Boenisch, Wilhelm Schäfer
Nov 26, 2015·Trends in Plant Science·Su-May YuTuan-Hua David Ho
Apr 15, 2017·Frontiers in Bioscience (Elite Edition)·Slavica MaticDavide Spadaro

❮ Previous
Next ❯