Foliar application of oil palm wood vinegar enhances pandanus amaryllifolius tolerance under drought stress

Mohd Amnan, Muhammad Asyraf and Teo, Wee Fei Aaron and Aizat, Wan Mohd and Khaidizar, Fiqri Dizar and Tan, Boon Chin (2023) Foliar application of oil palm wood vinegar enhances pandanus amaryllifolius tolerance under drought stress. Plants-Basel, 12 (4). ISSN 2223-7747, DOI

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Drought stress severely threatens plant growth, yield and survivability. Wood vinegar, formed by the condensation of smoke produced during biochar production, has been shown to promote plant growth and enhance stress tolerance. They have now been recognized as a sustainable alternative and are frequently used exogenously to support plants coping with environmental stress. This study aimed to evaluate the efficacy of oil palm wood vinegar (OPWV) in mitigating the adverse effects of drought stress on Pandanus amaryllifolius. The optimal concentrations and frequencies of OPWV application were determined before the drought treatment. The results showed that the imposed drought stress negatively affected the plant growth parameters but applying OPWV at 1:500 dilution at 3-day intervals for 12 days increased its tolerance. These include increased leaf relative water content, root-to-shoot ratio, relative stem circumference, chlorophyll pigments and antioxidant enzyme activities. In contrast, the drought-stressed plants treated with OPWV showed decreased relative electrolyte leakage, hydrogen peroxide, proline, malondialdehyde, and enhanced drought-responsive gene expressions, such as HSP70, GAPDH, and Thau, while ENO and beta-Fruc were reduced. These biostimulatory effects of OPWV might be due to several antioxidant compounds, such as anthranilic acid, tetrasiloxane, syringol, guaiacol, and catechol. Altogether, our results showed the effectiveness of OPWV in alleviating the adverse effects of drought stress, and as such, OPWV could be potentially applied in agriculture.

Item Type: Article
Funders: Ministry of Higher Education, Malaysia, under the Fundamental Research Grant Scheme FRGS/1/2018/STG03/UM/02/2, Universiti Malaya under RU Fund ST003-2021
Uncontrolled Keywords: Agriculture; Antioxidant enzymes; Biostimulants; Drought stress; Wood vinegar; Drought-responsive genes
Subjects: S Agriculture > S Agriculture (General)
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Centre for Research in Biotechnology for Agriculture
Depositing User: Ms Zaharah Ramly
Date Deposited: 14 Nov 2023 03:33
Last Modified: 14 Nov 2023 03:33

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