Studies Oil T0bacco Mosaic Virus in Faba Bean

A virus isolate(B一935A)from faba 13e2．n w collected in Hangzhou．Zhejiang province．The isolate could infect 1 2 plant species in tkrce families． On faba bean，the isolate produced mosaic symptoms and necrosis．Its thermal inactivaflon point was 85— 90℃ ，dilution end po int was 1 0一一1 0 ．The virus particles wore rod—shaped with the length of 300nm ． The capsid protein of B一935A containod one po lypeptide with molecular weight of 1 7500．Th e viral genon~ consisted single strand RNA with the approximate length of 6．4kb． 1m muno-serological electron m icroscopy r ISEM ) and agro ge1 double diffusion test showed B一935A strongly reacted with the antisera of TMV． On the basis of these characteristics the B一935A w／Is identified lis a faba bean sCraM of TM V．This is the first report of TIVlV on faba bean and first repo rt ofTM V on legum inous cropsin China.