Journal of Food, Agriculture and Environment

Mitigation of the adverse effect of salinity through stimulation some secondary metabolites and antioxidant enzymes of methanolic extract of maize cultivars by exogenous ascorbic acid

Author(s):

Zeinab A. Salama ^1*, Mohamed M. El Fouly ², Alaa A. Gaafar ¹

Recieved Date: 2013-07-11, Accepted Date: 2013-10-30

Abstract:

Exogenous application of ascorbic acid (AsA) has been shown to be an essential antioxidant agent involved in induction of systemic resistance response of plants after salt stress. Our study was carried out in the Department of Fertilization Technology at National Research Centre, Cairo, Egypt. This study aimed to study the effect of foliar spray with 100 ppm of ascorbic acid (AsA) on two maize cultivars (mono hybrid and triple hybrid) grown hydroponically. Growth parameters, total phenolics content (TFC), total flavonoids content (TFC) and their antioxidant activity, photosynthesis pigments, carbonic anhydrase (CAA, EC 4.2.1.1), peroxidase (POD, EC 1.11.1.7) and catalase (CAT, 1.11.1.6) activities were evaluated. Salt induced increase in TPC, TFC and their antioxidant activities. Salt stress negatively affected pigment contents, whereas antioxidant enzyme activities were increased. DPPH.scavenging activity correlated well with  TPC and TFC. The results supported that DPPH.radical scavenging activity and Fe²⁺-chelating activity may be evaluated as reliable parameters to assess the ability of antioxidants to hinder salt stress. Foliar spray with AsA enhanced the activities of catalase, whereas peroxidase showed least effect. This study suggested that AsA application may induce an adaptive response in maize through stimulation of phenol and flavonoid biosynthesis and antioxidant enzyme activities.

Keywords:

Salinity, ascorbic acid, enzymes, antioxidants, maize

---

Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Agriculture
Pages: 1328-1335

---

Full text for Subscribers

---

Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

---

Purchase this Article:   20 Purchase PDF Order Reprints for 15

---

Share this article :