INSIBIO   05451
INSTITUTO SUPERIOR DE INVESTIGACIONES BIOLOGICAS
Unidad Ejecutora - UE
artículos
Título:
Growth-promotion of strawberry plants inoculated with Azospirillum brasilense.
Autor/es:
PEDRAZA, RAÚL O.; MOTOK, JESSICA; SALAZAR, SERGIO M; RAGOUT, ALICIA L.; MENTEL, MARÍA I.; TORTORA, MA LAURA; GUERRERO MOLINA, MA. FERNANDA; WINIK, BEATRIZ C.; DIAZ RICCI, JUAN C
Revista:
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
Editorial:
Springer
Referencias:
Lugar: New York; Año: 2009 vol. 26 p. 265 - 272
ISSN:
0959-3993
Resumen:
Azospirillum brasilense (strains REC3, RLC1,
PEC5) were root inoculated in strawberry plants of the
cultivars Milsei, Selva and Camarosa to assess plant
growth-promoting effects. The bacteria were able to promote
plant growth (expressed as root length, root area, and
dry weight of root and shoot), depending on the genotypes
of plants and bacteria used, whereas the stolon production
(34) depended only on the strawberry cultivar. To explain
whether root exudates plays any role on the growth-promotion
observed herein, total protein and sugar were
determined, and chemotaxis properties were evaluated. The
strains showed positive chemotaxis toward the root exudates,
being influenced by the total sugars content, suggesting
that the latter plays an important role in the
chemotaxis effect and may contribute to enhance the root
capacity to recruit azospirilla from rhizosphere, thus
improving the growth-promoting effect exerted by these
bacteria.