SciELO - Scientific Electronic Library Online

 
vol.16 número2Multi-rotation impacts of increased organic matter removal in planted forestsEffect of residue mixtures on response of cumulative respiration to salinity índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Em processo de indexaçãoCitado por Google
  • Não possue artigos similaresSimilares em SciELO
  • Em processo de indexaçãoSimilares em Google

Compartilhar


Journal of soil science and plant nutrition

versão On-line ISSN 0718-9516

Resumo

ARMADA, E; LOPEZ-CASTILLO, O; ROLDAN, A  e  AZCON, R. Potential of mycorrhizal inocula to improve growth, nutrition and enzymatic activities in Retama sphaerocarpa compared with chemical fertilization under drought conditions. J. Soil Sci. Plant Nutr. [online]. 2016, vol.16, n.2, pp.380-399.  Epub 04-Maio-2016. ISSN 0718-9516.  http://dx.doi.org/10.4067/S0718-95162016005000035.

The growth of Retama sphaerocarpa under drought conditions was similarly increased by arbuscular mycorrhizal (AM) colonization [native AM fungal consortium (M), allochthonous Rhizophagus intraradices (RI)] or H3PO4 application [25 ppm P (1P) or 50 ppm P (2P)]. However, the antioxidant ascorbate peroxidase (APX) activity was increased by P-fertilization and decreased by AM colonization in plants of similar size, which revealed possible AM protection against drought. RI was most effective in enhancing P and it also reduced glutathione reductase (GR) activity compared with plants of similar biomass from other treatments. In a subsequent study the mixture of autochthonous inocula (AM fungal consortium (M) plus native Bacillus thuringiensis (B)) were able to fortify K2SO4 fertilization [5 mM K (1K) or 10 mM K (2K)] on R. sphaerocarpa under drought. Dual inocula increased nutrient content only in plants fertilized with 1K, while 2K even decreased the abundance of arbuscules. The reduced superoxide dismutase (SOD) and APX and the elimination of catalase (CAT) and GR activities found in co-inoculated K-fertilized plants suggested the lowest oxidative stress and the highest potential to cope with drought irrespective of nutrition. In both experiments inocula enhanced soil enzymatic activities, which also contributed to higher performance of inoculated plants under drought.

Palavras-chave : Drought stress; mycorrhizal-colonization; P or K fertilization; antioxidant activities; Retama sphaerocarpa nutrition; enzymatic soil activities.

        · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons