Enhanced Mineral Uptake by Zea mays and Sorghum bicolor Roots Inoculated with Azospirillum brasilense.
Appl Environ Microbiol
; 45(6): 1775-9, 1983 Jun.
Article
en En
| MEDLINE
| ID: mdl-16346311
Inoculation of corn (Zea mays) seeds with Azospirillum brasilense strain Cd or Sp 7 significantly enhanced (30 to 50% over controls) the uptake of NO(3), K, and H(2)PO(4) into 3- to 4-day- and 2-week-old root segments. No gross changes in root morphology were observed; altered cell arrangement in the outer four or five layers of the cortex was seen in photomicrographs of cross sections of inoculated corn roots. The surface activity involved in ion uptake probably increased, as shown by the darker staining by methylene blue of the affected area. Shoot dry weight increased 20 to 30% in inoculated plants after 3 weeks, presumably by enhancement of mineral uptake. Corn and sorghum plants grown to maturity on limiting nutrients in the greenhouse showed improved growth from inoculation approaching that of plants grown on normal nutrient concentrations. Enhanced ion uptake may be a significant factor in the crop yield enhancement reported for Azospirillum inoculation.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
País/Región como asunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Appl Environ Microbiol
Año:
1983
Tipo del documento:
Article
Pais de publicación:
Estados Unidos