Effects of long-term continuous monocropping on community structure and abundance of Pseudomonas spp. in cucumber rhizosphere
- Gao, H.
- Rahman, M. K. 1
- Qiao, P.L.
- Wu, F.Z.
- Zhou, X.G.
- 1 Northeast Agricultural University - China
ISSN: 0971-4693, 0973-5046
Ano de publicación: 2020
Volume: 51
Número: 2
Páxinas: 157-164
Tipo: Artigo
Outras publicacións en: Allelopathy Journal
Resumo
We grew cucumber in pots in greenhouse for 9-successive cropping cycles and analyzed the rhizosphere Pseudomonas spp. community structure and abundance by PCR-denaturing gradient gel electrophoresis and quantitative PCR. Results showed that continuous monocropping changed the cucumber rhizosphere Pseudomonas spp. community. The number of DGGE bands, Shannon-Wiener index and Evenness index decreased during the 3rd cropping and thereafter, increased up to the 7th cropping, however, however, afterwards they decreased again. The abundance of Pseudomonas spp. increased up to the 5th successive cropping and then decreased gradually. These findings indicated that the structure and abundance of Pseudomonas spp. community changed with long-term cucumber monocropping, which might be linked to soil sickness caused by its continuous monocropping.