Data/hora: 10/06/2024 13:54:00

Biblioteca(s): | Embrapa Agrobiologia; Embrapa Clima Temperado.
Data corrente: | 24/08/1995
Data da última atualização: | 24/08/1995
Autoria: | VARGAS, A. A. T.
Título: | Tolerance of beans (Phaseolus vulgaris, L.) and Rhizobium leguminosarum bv Phaseoli to low pH.
Ano de publicação: | 1987
Fonte/Imprenta: | [s.l.] : University of Minnesota, 1987.
Páginas: | 123p.
Idioma: | Inglês
Notas: | Tese Doutorado.
Conteúdo: | Bean (Phaseolus vulgaris,L.) and Rhizobium leguminosarum bv. phaseoli tolerance to acidity were assessed. Of 217 Rhizobium isolates, 20 were both highly efficient in N2- fixation and tolerant of pH 4,5, and variably tolerant of 100 micromicras or 200 micromicras Mn. Marked variation among 126 bean varieties for tolerance to pH 4,5 was also found, with 20 cultivars outstanding in nodulation and plant development at acid pH. At pH 4,5 there was a significant correlation between the dry mass of beans when supplied with combined nitrogen and when inoculated with pH-tolerant rhizobia. A pH-sensitive bean cultivar showed a strong response to inoculation with an acid-tolerant Rhizobium when growing in media of pH 4,5. pH significantly affected rhizobial competition  for nodule sites, with the acid tolerant strain competing better than the acid-sensitive Rhizobium at pH 4,5, when both were inoculated at the same cell concentration. Acid pH effects or rhizobial multiplication in the bean rhizosphere and on attachment were most pronounced when both host cultivar and Rhizobium strain were pH-sensitive, with little effect of pH when either one of the partners was acid-tolerant. Study of inheritance of acid pH tolerance in beans showed it to be a heritable trait. Both shoot and nodule dry weight could be used to evaluate cultivars for tolerance to acid pH when dependent upon symbiotically-fixed N2.
Thesagro: | Acidez; Feijão; Ph; Phaseolus Vulgaris; Rhizobium Leguminosarum.
Thesaurus Nal: | kidney beans.
Categoria do assunto: | --
Registro original: | Embrapa Clima Temperado (CPACT)

Exemplares:

CNPAB - (25168-1) - ADD - TS - -- - 635.652 - V297t - 1988.00015 - DIS
CPACT - (2746-1) - ADD - TS - -- - 00958 -  - 1987.00958 - DIS