Data/hora: 05/06/2024 01:23:05

Provedor de dados: | 37
País: | Colombia
Título: | ALLEVIATION OF SALINITY STRESS ON Vicia faba L. PLANTS VIA SEED PRIMING WITH MELATONIN
Autores: | DAWOOD,Mona Gergis; EL-AWADI,Mohamed E.
Data: | 2015-05-01
Ano: | 2015
Palavras-chave: | Indole acetic acid; Legumes; Minerals; N-acetyl-5-methoxytryptamine; Protein patterns; Seawater.
Resumo: | Melatonin is an environmentally friendly-molecule with a potent free radical scavenger and antioxidant capacity. Two pot experiments were conducted during two successive winter seasons (2011/2012 and 2012/2013) at the wire-house of the National Research Centre, Dokki, Cairo, Egypt to study the potentiality of melatonin (100 mM and 500 mM) in alleviating the harmful effect of diluted seawater at a relatively low and high concentrations (3.85 dS/m and 7.69 dS/m, respectively) on the performance of faba bean plants. The results revealed that irrigation of faba bean plants with diluted seawater reduced growth parameters (plant height, leaves number/plant, fresh and dry weights of plant), relative water content (RWC), photosynthetic pigments (chlorophylls a, b and carotenoids), indole acetic acid, total carbohydrate, K+,Ca+2, as well as the ratios of K+/Na+ and Ca+2/Na+. Thiswasaccompanied by significant increases in phenolic content, compatible solutes (total soluble carbohydrate, free amino acids, proline), Na+ and Cl- relative to the control plants (untreated plants). On the other hand, melatonin treatments improved growth parameters, RWC, photosynthetic pigments, total carbohydrate, total phenolic content, indole acetic acid, K+,Ca+2 as well as K+/Na+ and Ca+2/Na+ ratios, either in the plants irrigated with tap water or with diluted seawater, as compared with corresponding controls. Meanwhile, melatonin treatments reduced the levels of compatible solutes, as well as Na+ and Cl- contents, relative to those of corresponding controls. Salinity stress and/ or melatonin treatments induced the production of new protein bands that did not occur in the control plants. Melatonin at 500 mM had a more pronounced effect in alleviating the adverse effects of the two salinity levels under study on the performance of faba bean plants than 100 mM melatonin.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000200022
Editor: | Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Biología
Relação: | 10.15446/abc.v20n2.43291
Formato: | text/html
Fonte: | Acta Biológica Colombiana  v.20 n.2 2015
Fonte: | info:eu-repo/semantics/openAccess