Related concepts Aspecies: a collection of strains that have a similar G+C composotion and 70% or greater similarity as judged by DNA hybridization experiments. biovars: variant procaryotic strains characterized by biochemical or physiological differences. Morphovars: differ morphologically Serovars: have distinctive antigenic properties
一、 DEFINITION Fundamental metabolism: water metabolism, mineral nutrition ,photosynthesis, repiration Seed germination,growth, differentiation, flower ing,fertilization