Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Ascorbic acid mediated Salt Tolerance in Gerbera jamesonii: A Promising Strategy for Sustainable Floriculture

Version 1 : Received: 26 October 2023 / Approved: 26 October 2023 / Online: 26 October 2023 (16:44:52 CEST)

How to cite: Farooq, M.; Uzma, J.; Dayakar, T.; Pizzio, G.A.; Mamidala, P. Ascorbic acid mediated Salt Tolerance in Gerbera jamesonii: A Promising Strategy for Sustainable Floriculture. Preprints 2023, 2023101739. https://doi.org/10.20944/preprints202310.1739.v1 Farooq, M.; Uzma, J.; Dayakar, T.; Pizzio, G.A.; Mamidala, P. Ascorbic acid mediated Salt Tolerance in Gerbera jamesonii: A Promising Strategy for Sustainable Floriculture. Preprints 2023, 2023101739. https://doi.org/10.20944/preprints202310.1739.v1

Abstract

Cut flowers of Gerbera jamesonii, renowned globally for their vibrant colors and extended shelf life, play a pivotal role in the flourishing floriculture industry. However, repeated fertigation in nethouses/polyhouses poses a significant challenge leading to production losses. In response to this challenge, we hypothesized that the application of Ascorbic acid (AsA), an antioxidant, in optimal concentrations could alleviate the detrimental effects of salt toxicity and enhance Gerbera production. Our objective was to investigate the impact of exogenous AsA (1.0 mM, 2.0 mM, and 4.0 mM) as a foliar spray, followed by NaCl (200 mM) treatment, across two cultivars of Gerbera: white-flowered (salt sensitive) and yellow flowered (salt tolerant) cultivars. The research employed a comprehensive approach, applying AsA and NaCl treatment to evaluate their effects on chlorophyll, proline, and total soluble protein content, MDA, H2O2, and antioxidant enzyme activities (SOD, CAT, APX, GR, and POD). Following exposure to 2.0 mM AsA, treated plants displayed a notable increase in chlorophyll, Proline, and soluble protein content. Concurrently, MDA and H2O2 levels, indicator of intracellular damage, exhibited a decrement, suggesting AsA's protective role against salt stress. Moreover, enhanced antioxidant Enzyme activities were observed. The application of AsA (2.0 mM) not only induced salt tolerance in Gerbera but also showed potential benefits for its overall growth and development. This study underscores the promising role of AsA in mitigating salt-induced challenges in Gerbera cultivation.

Keywords

Gerbera jamesonii; ascorbic acid; salt stress; antioxidant enzymes; ROS; floriculture industry

Subject

Biology and Life Sciences, Plant Sciences

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