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Effect of Salicylic acid and Methyl Jasmonate on Antioxidant systems of Haematococcus pluvialis

Vidhyavathi, Raman and Sarada, Ravi (2011) Effect of Salicylic acid and Methyl Jasmonate on Antioxidant systems of Haematococcus pluvialis. Acta Physiologiae Plantarum , 33. pp. 1043-1049.

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The influence of phytohormones, salicylic acid (SA) and methyl jasmonate (MJ) on the antioxidant systems in Haematococcus pluvialis was investigated. Both SA and MJ at 500 lM concentration reduced the growth of alga with salicylic acid, having more pronounced effect. Carotenoid and chlorophyll contents were decreased by SA and increased by MJ. Salicylic acid (100 lM) increased astaxanthin content to 6.8-fold under low light (30 lmol m-2 s-1), while MJ (10 lM) showed marginal increase in astaxanthin. Salicylic acid (500 lM) increased superoxide dismutase activity to 4.5- and 3.3-fold and ascorbate peroxidase (APX) activity to 15.5- and 7.1-fold under low and high light, respectively. Methyl jasmonate increased catalase activity (1.4-fold) under high light and APX activity (5.4-fold) under low light. Different mechanism of oxidative stress induced antioxidant production may be the plausible reason for this varied response for salicylic acid and methyl jasmonate. Higher concentrations of SA and MJ inhibited astaxanthin accumulation by different mechanisms either by scavenging the free radicals or by increasing primary carotenoids production. At lower concentrations, these phytohormones could be used for elicitation of secondary carotenoid production.

Item Type: Article
Uncontrolled Keywords: Ascorbate peroxidase, Astaxanthin Catalase Haematococcus pluvialis Phytohormones Superoxide dismutase
Subjects: 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 14 Carotenoid Chemistry
600 Technology > 08 Food technology > 32 Antioxidants
Divisions: Plant Cell Biotechnology
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 04 Feb 2011 09:15
Last Modified: 10 Feb 2012 11:12
URI: http://ir.cftri.com/id/eprint/9878

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