Associative diazotrophs of pearl millet (Pennisetum glaucum) from semi arid region--isolation and characterization.
Indian J Exp Biol
;
2003 Apr; 41(4): 341-5
Artigo
em Inglês
| IMSEAR
| ID: sea-61696
ABSTRACT
Diversity of the native diazotrophs associated with the rhizosphere of pearl millet (P. glaucumn), grown in nutritionally poor soils of semi-arid regions was studied with a view to isolate effective nitrogen fixing and plant growth stimulating bacteria with root associative characteristics. The native population varied from 10(3)-10(4) g(-1) of rhizosphere soil after 40 d growth and belonged to genera Azospirillum, Azotobacter and Klebsiella. Another non-diazotrophic root associative group was Pseudomonas sp., which also produced IAA and enhanced plant growth. Some of these rhizobacteria showed high in vitro acetylene reduction activity along with production of indole acetic acid. Out of 11 selected diazotrophs used as seed inoculants, M10B (Azospirillum sp.), M11E (Azotobacter sp.) and M12D4 (Klebsiella sp.) resulted in significant increase in total root and shoot nitrogen at 45 and 60 days of plant growth under pot culture conditions.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Reguladores de Crescimento de Plantas
/
Acetileno
/
Microbiologia do Solo
/
Bactérias
/
Brotos de Planta
/
Raízes de Plantas
/
Pennisetum
/
Ácidos Indolacéticos
/
Fixação de Nitrogênio
Idioma:
Inglês
Revista:
Indian J Exp Biol
Ano de publicação:
2003
Tipo de documento:
Artigo
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