Hairs as Physical Barrier against Adhesion of Xanthomonas axonopodis pv. glycines on Soybean Leaf
콩 잎 엽모에 의한 불마름병균 부착 저해

Seung-Han Kim, Seuk-Hee Park, Jin-Ha Woo, Sung-Young Choi
2015 Research in Plant Disease  
Bacterial pustule of soybean is caused by Xanthomonas axonopodis pv. glycines, one of the most important diseases in soybean. The symptom of bacterial pustule is mainly distributed around leaf veins. However, the reason has not been known. In order to determine pathosystem of bacterial pustule in leaf, soybean leaves were collected and observed using scanning electron microscopy (SEM) and light microscopy. Many hairs were observed at abaxial sides of the leaf, few hairs were observed at tissue
more » ... observed at tissue around the leaf veins. In addition, unidentified bacterial cells and dusts at the no hair part near veins were observed. In the inoculation assays, the cells of X. axonopodis pv. glycines were observed near leaf veins. The imprint of underside of soybean leaves inoculated with X.axonopodis pv. glycines on PDA showed that the growth of bacteria around veins was observed but no bacterial growth at the part with leaf hairs. Our data demonstrated that soybean leaf hairs play an important role as a physical barrier for structural resistance of soybean against bacterial pustule pathogen.
doi:10.5423/rpd.2015.21.1.040 fatcat:m7suhvr3jfh2nnd452xif3wpea