Comparison of Rhizosphere Bacteria Diversity Between Fusarium Wilt Resistant and Susceptible Watermelon

Abstract:

The traditional culture methods and the molecular biology methods were used to study the rhizosphere bacterial diversity between fusarium wilt resistant and susceptible watermelon. The results showed that the diversity and the equality of cultured rhizosphere bacteria of resistant watermelon were higher than those of the susceptible watermelon. The reason was that the cultured rhizosphere bacterial diversity index H′ and 1/D of the resistant watermelon were higher than those of the susceptible watermelon and that the cultured rhizosphere bacterial equality index E of the resistant watermelon were higher than those of the susceptible watermelon. The dominant cultured bacterial genotypes were different between resistant and susceptible watermelon. The genotype 1 is the dominant genotype of resistant watermelon, consists 51.1%. The genotype 7 is the dominant genotype of susceptible watermelon, consists 58.7%.

Key words:Rhizoshpere bacteria of watermelon, Culture, 16S PCR-RFLP, Diversity index