Ascorbic Acid Induces the Increase of Secondary Metabolites, Antioxidant Activity, Growth, and Productivity of the Common Bean under Water Stress Conditions
Alaa A. Gaafar , Sami I. Ali , Mohamed A. El-Shawadfy , Zeinab A. Salama , Agnieszka Sękara , Christian Ulrichs , Magdi T. Abdelhamid
AbstractOne of the most vital environmental factors that restricts plant production in arid and semi-arid environments is the lack of fresh water and drought stress. Common bean (Phaseolus vulgaris L.) productivity is severely limited by abiotic stress, especially climate-related constraints. Therefore, a field experiment in split-plot design was carried out to examine the potential function of ascorbic acid (AsA) in mitigating the adverse effects of water stress on common bean. The experiment included two irrigation regimes (100% or 50% of crop evapotranspiration) and three AsA doses (0, 200, or 400 mg L−1 AsA). The results revealed that water stress reduced common bean photosynthetic pigments (chlorophyll and carotenoids), carbonic anhydrase activity, antioxidant activities (2,2-diphenyl-1-picrylhydrazyl free radical activity scavenging activity and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation assay), growth and seed yield, while increased enzymatic antioxidants (peroxidase), secondary metabolites (phenolic, flavonoids, and tannins), malondialdehyde (MDA), and crop water productivity. In contrast, the AsA foliar spray enhanced all studied traits and the enhancement was gradual with the increasing AsA dose. The linear regression model predicted that when the AsA dose increase by 1.0 mg L–1, the seed yield is expected to increase by 0.06 g m–2. Enhanced water stress tolerance through adequate ascorbic acid application is a promising strategy to increase the tolerance and productivity of common bean under water stress. Moreover, the response of common bean to water deficit appears to be dependent on AsA dose.
|Journal series||Plants, [Plants], ISSN 2223-7747, e-ISSN 2223-7747, (N/A 70 pkt)|
|Publication size in sheets||1.2|
|Keywords in English||ascorbic acid; antioxidant systems; drought stress; Phaseolus vulgaris; secondary metabolites; yield|
|ASJC Classification||; ;|
|License||Journal (articles only); author's original; ; after publication|
|Publication indicators||= 0; : 2017 = 0.969; : 2018 = 2.632 (2)|
|Finansowanie||This work was part of Research Project No. 11030129, supported by The National Research Centre, Cairo, Egypt. This work was also partially supported by the Ministry of Science and Higher Education of the Republic of Poland.|
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