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Effects of water-saving superabsorbent polymer on antioxidant enzyme activities and lipid peroxidation in oat (Avena sativa L.) under drought stress.
Islam, M Robiul; Xue, Xuzhang; Mao, Sishuai; Ren, Changzhong; Eneji, A Egrinya; Hu, Yuegao.
Afiliação
  • Islam MR; College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China.
J Sci Food Agric ; 91(4): 680-6, 2011 Mar 15.
Article em En | MEDLINE | ID: mdl-21302322
ABSTRACT

BACKGROUND:

Drought stress significantly limits oat (Avena sativa L.) growth and productivity. Thus an efficient management of soil moisture and study of metabolic changes in response to drought are important for improved production of oat. The objective was to gain a better understanding of drought tolerance mechanisms and improve soil water management strategies using water-saving superabsorbent polymer (SAP) at 60 kg ha(-1) under three irrigation levels (adequate, moderate and deficit) using a new type of hydraulic pressure-controlled auto irrigator.

RESULTS:

The results showed that the relative water content and leaf water potential (ψ(1) ) were much higher in oats treated with SAP. Although the SAP had little effect on plant biomass accumulation under adequate and moderate irrigation, it significantly increased the biomass by 52.7% under deficit irrigation. Plants treated with SAP under deficit irrigation showed a significant decrease in superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and glutathione reductase activities in leaves compared with control plants.

CONCLUSION:

Our results suggested that drought stress leads to production of oxygen radicals, which results in increased lipid peroxidation and oxidative stress in the plant, and the application of SAP could conserve soil water, making same available to plants for increased biomass accumulation and reduced oxidative stress especially under severe water stress.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Água / Peroxidação de Lipídeos / Estresse Oxidativo / Avena / Secas / Irrigação Agrícola / Antioxidantes Idioma: En Revista: J Sci Food Agric Ano de publicação: 2011 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Água / Peroxidação de Lipídeos / Estresse Oxidativo / Avena / Secas / Irrigação Agrícola / Antioxidantes Idioma: En Revista: J Sci Food Agric Ano de publicação: 2011 Tipo de documento: Article País de afiliação: China