期刊
JOURNAL OF GEOCHEMICAL EXPLORATION
卷 136, 期 -, 页码 48-54出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.gexplo.2013.10.005
关键词
Peroxidases; Abscisic acid; Aquaporin; Humic acids; Oryza sativa L.
资金
- Academy of Sciences for the Developing World (TWAS)
- National Council of Technological and Scientific Development (Conselho Nacional do Desenvolvimento Cientifico e Tecnologico - CNPq) (CNPq-TWAS agreement)
- Foundation of the State of Rio de Janeiro (Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro - FAPERJ)
- CNPq (UNIVERSAL)
The aim of this study,was to assess the effects of applying humic acid (HA) to rice plants under water stress conditions. HA maintained peroxidase activity below the levels found in plants that were under stress without the addition of HA Lipid peroxidation in the roots and leaves was lower in the treatments with HA compared to the plants that were under stress that were not treated with HA. Plants that were under water stress and treated with HA maintained abscisic acid levels similar to those of the control plants. HA exerted differential effects on the expression of aquaporin in both root and leaf tissues. Alkyl, carboxylic and carbonyl structures predominated in the agglomerated HA at the roots. These results demonstrate that HA exerted a protective effect possibly through signaling mechanism independent of ABA, regulation of OsTIPs genes and potentially initiated by chemical and physical interactions between HA and the plant root system. (C) 2013 Elsevier B.V. All rights reserved.
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