| Texto completo | |
| Autor(es): |
Número total de Autores: 4
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| Afiliação do(s) autor(es): | [1] Fac Agr Sci UNOESTE, Rod Raposo Tavares Km 572, BR-19067175 Presidente Prudente, SP - Brazil
Número total de Afiliações: 1
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| Tipo de documento: | Artigo Científico |
| Fonte: | APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH; v. 16, n. 4, p. 3885-3895, 2018. |
| Citações Web of Science: | 0 |
| Resumo | |
The aim of this work was to evaluate the effects of Bacillus subtilis inoculation on the growth and the photosynthetic activity of maize plants under conditions of water stress in two regimes of light intensity. Plants were inoculated with two strains of B. subtilis directly onto the soil and maintained for 40 days in a growth chamber under controlled conditions. Two experiments were carried out under two conditions of light intensity (300 and 900 mu mol m(-2) s(-1) photons). During the conduction of the plants, two water supply regimes based on evapotranspiration replacement were established. At 35 days of plant growth, the following physiological parameters were evaluated: photosynthetic rate, intercellular CO2 concentration, stomatal conductance, transpiration and water use efficiency. Plants were collected (40 days) to evaluate the production of dry biomass. B. subtilis increased the water use efficiency in maize plants submitted to water stress under two light intensities. The maize gas exchange response to water stress and presence of rhizobacteria were differentiated for the two light conditions. The low light intensity condition provided lower stomatal conductance and CO2 assimilation and greater efficiency in water use in plants inoculated with Bacillus subtilis (AP-3) under conditions of water deficit. The high intensity condition provided significant differences in the reduction of stomatal conductance in plants with stress compared to plants without stress when inoculated with B. subtilis PRBS-1. (AU) | |
| Processo FAPESP: | 13/20328-0 - Promoção de crescimento e atividades bioquímicas em plantas inoculadas com Bacillus subtilis em condições de estresse hídrico |
| Beneficiário: | Fabio Fernando de Araujo |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |