Effect of abscisic acid on biochemical constituents, enzymatic and non enzymatic antioxidant status of lettuce (Lactuca sativa L.) under varied irrigation regimes

Mohamed A. Al Muhairi, Abdul J. Cheruth, Shyam S. Kurup, Gabriel A. Rabert, Mohammad S. Al-Yafei

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    Economically important vegetable crop lettuce (Lactuca sativa L.) of family Asteraceae was selected for the present investigation. It is being cultivated in UAE due to its commercial importance. In lettuce cultivation, the major problem is the requirement of large quantities of irrigation water. The present study was aimed to reduce the water consumption of lettuce cultivation; for that, a varied irrigation regime was used with the application of abscisic acid (ABA). The parameters studied were biochemical constituents, antioxidant potential and antioxidant enzymes’ activities in lettuce plants under drought stress and its response to ABA under stress. Drought stress caused an increase in the biochemical constituents like proline and amino acid contents when compared with control and also increased under individual ABA treatments and treatments under drought stress. The non-enzymatic antioxidant molecules like ascorbate and α-tocopherol showed significant increase under drought condition in lettuce. ABA slightly reduced these contents. The antioxidant enzymes like superoxide dismutase, catalase and peroxidase showed significant increase under drought condition and ABA caused significant enhancement in these antioxidant enzymes under drought stress and also in unstressed conditions, thereby protecting the plants from the deleterious effects of drought stress. From the results of this investigation, it can be concluded that ABA in 10 mg g−1 can be used as a potential tool to minimise the drought stress effects in lettuce cultivation.

    Original languageEnglish
    Article number1080888
    JournalCogent Food and Agriculture
    Volume1
    Issue number1
    DOIs
    Publication statusPublished - 2015

    Keywords

    • antioxidant activity
    • antioxidant contents
    • drought
    • lettuce
    • morphology
    • pigments

    ASJC Scopus subject areas

    • Food Science
    • Agricultural and Biological Sciences (miscellaneous)

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