Responses of the common bean (Phaseolus vulgaris L.) and Rhizobium tropici CIAT899 symbiosystem to induced allelopathy by Ipomoea purpurea L. Roth
Por:
Janneth Perez-Peralta, Paulina, Ferrera-Cerrato, Ronald, Alarcon, Alejandro, Trejo-Tellez, I, Libia, Cruz-Ortega, Rocio, Silva-Rojas, V, Hilda
Publicada:
1 ene 2019
Resumen:
Allelopathy is a phenomenon that involves the production of secondary
metabolites that influence the growth of plants and microorganisms;
however, this aleltopathic effect has been scarcely studied on the
rhizobia-legume symbiosis. The aims of this research were 1) to assess
the allelopathic potential of aqueous extracts of Ipomoea purpurea L.
Roth on seed germination and root length of common bean seedlings
(Phaseolus vulgaris L.), 2) to determine its effects on the in vitro
growth of Rhizobium tropici CIAT899, and 3) to evaluate the alletopathic
potential of I. purpurea on the growth, nodulation and physiology of
common bean plants inoculated with R. tropici. After 48 h, 15% of the
aqueous root extract of I. purpurea stimulated seed germination, whereas
4% of the aqueous shoot extracts stimulated such germination. Both the
root or shoot extracts stimulated seed germination and e root length. In
vitro growth of R. tropici was inhibited as a result of the application
of both aqueous extracts. The presence of I. purpurea negatively
affected both the growth and physiological responses of common bean
plants, and this effect was attenuated after the inoculation of R.
tropici; nevertheless, this allelopathic plant affected root nodulation.
Our results suggest that the symbiosis of rhizobia and roots of common
bean plants is an important element for attenuating the negative effects
caused by the allelopathic plant. (C) 2018 Asociacion Argentina de
Microbiologia. Published by Elsevier Espana, S.L.U.
Filiaciones:
Janneth Perez-Peralta, Paulina:
Trejo-Tellez, Libia, I, Colegio Postgrad, Posgrad Edafol, Texcoco, Estado De Mexic, Mexico
Ferrera-Cerrato, Ronald:
Trejo-Tellez, Libia, I, Colegio Postgrad, Posgrad Edafol, Texcoco, Estado De Mexic, Mexico
Alarcon, Alejandro:
Trejo-Tellez, Libia, I, Colegio Postgrad, Posgrad Edafol, Texcoco, Estado De Mexic, Mexico
Cruz-Ortega, Rocio:
Univ Nacl Autonoma Mexico, Inst Ecol, Coyoacan, Ciudad De Mexic, Mexico
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