Data/hora: 03/06/2024 11:12:34

Biblioteca(s): | Embrapa Agrobiologia; Embrapa Unidades Centrais.
Data corrente: | 27/06/1995
Data da última atualização: | 18/02/2002
Autoria: | VARGAS, M. A. T.
Título: | Competitiveness and Rhizosphere Colonization of Bradyrhizobium sp Strains of Chickpea.
Ano de publicação: | 1990
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, V. 25, n.4, p. 599-607, abr.1990

Idioma:

Inglês
Português

Conteúdo: | Factors affecting competition among strains of Bradyrhizobium sp for nodulation of chickpea (Cicer arietinum L.) were investigated in the greenhouse. Nodule occupancy by two strains varied when the strains were co-inoculated either in Leonard jars on in soil pots, or when inoculum ratios of the strains were changed. In another experiment, early rizosphere dominance in root tips or total rizosphere did not reflect nodule occupancy, as all the nodules were formed by the soil-born  strain, which represented  less than 1%& of the early rizosphere population. In a time-course inoculation experiment with 2-day-old chickpea seedlings, a delay in adding the secondary inoculum by 4 h increased the nodule occupancy of the primary strain from 16 to 94%. The results indicate that actual rates of strains are impoortant only when the strains are inoculated together under the same conditions, but when different inoculation methods were used, rhizosphere numbers did not define nodule occupancy by the strains.
Palavras-Chave: | COMPETITIVIDADE; inoculation; Leonard jars; nodules; soil pots.
Thesagro: | Cicer Arietinum.
Categoria do assunto: | --
Registro original: | Embrapa Unidades Centrais (AI-SEDE)

Exemplares:

AI-SEDE - (21415-1) - UMT - AP - -- - 63072081 - P474 -  - DIS
CNPAB - (18144-1) - ADC - AP - -- -  -  - 16240 - DIS