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Abscisic acid-mediated leaf phenolic compounds, plant growth and yield is strawberry under different salt stress regimes

Abstract

The present research was conducted to evaluate the interaction effects of exogenous abscisic acid (ABA) and salt stress on phenolic compounds, growth and yield of two short day strawberry cvs "Queen Elisa" and "Kurdistan". Plants were subjected to control, gradual salt stress (up to 20 mmol L-1 over 5 weeks) and salinity shock (20 mmol L-1). ABA treatments included: 0 (control), 5, 10, 20 and 40 µmol L-1. The experiment was carried out based on a complete randomized design in factorial experiment. The highest level of ferulic acid was observed by applying 40 µmol L-1 ABA in "Queen Elisa" under salt stress shock but effective increase in caffeic acid and p-coumaric acid was shown at gradual salt stress for both cultivars at the same ABA level. Maximum level of ABA led to the highest gentisic acid and gallic acid at gradual salt stress in "Kurdistan". Methyl gallate and flavonoid content showed a striking increase at the same conditions in "Queen Elisa". The interaction effect of salt stress regimes and ABA resulted in an increase in ellagic acid content for both cultivars. The interaction effect of ABA and salt shock caused higher reduction in root and shoot fresh dry weights and decrease in fruit yield in "Kurdistan". The results of this experiment accounts for the important role of exogenous ABA in the activation of antioxidant defense mechanism, growth and yield maintenance under gradual salt stress in strawberry.

ABA; Fragaria; phenolics; salinity; fruit


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Publication Dates

  • Publication in this collection
    10 Feb 2014
  • Date of issue
    Dec 2013

History

  • Received
    09 Aug 2013
  • Accepted
    03 Dec 2013
Sociedade Brasileira de Fisiologia Vegetal Universidade Estadual do Norte Fluminense Darcy Ribeiro, Centro de Ciências e Tecnologias Agropecuárias, Av. Alberto Lamego, 2000, 28013-602 Campo dos Goytacazes, RJ, Brasil, Tel.: (55 22) 2739-7116 - Campo dos Goytacazes - RJ - Brazil
E-mail: bjpp.sbfv@gmail.com