Alleviation of drought stress in faba bean (Vicia fabaL.) by exogenous application of b-aminobutyric acid (BABA)

Abid, G. , Ouertani, R. , Jebara, S. , Boubakri, H. , Muhovski, Y. , Ghouili, E. , Abdelkarim, S. , Chaieb, O. , Hidri, Y. , Kadri, S. , El Ayed, M. , Elkahoui, S. , Barhoumi, F. & Jebara, M. (2020). Alleviation of drought stress in faba bean (Vicia fabaL.) by exogenous application of b-aminobutyric acid (BABA). Physiol Mol Biol Plants, 26: 1173–1186.

Type	Journal Article
Year	2020
Title	Alleviation of drought stress in faba bean (Vicia fabaL.) by exogenous application of b-aminobutyric acid (BABA)
Journal	Physiol Mol Biol Plants
Label	U1 Muhovski
Volume	26
Pages	1173–1186
Endnote Keywords	b-Aminobutyric acid (BABA), Drought stress, Gene expression, Vicia faba, qRT-PCR
Abstract	Drought stress is one of the most prevalentenvironmental factors limiting faba bean (Vicia fabaL.)crop productivity.b-aminobutyric acid (BABA) is a non-protein amino acid that may be involved in the regulationof plant adaptation to drought stress. The effect of exoge-nous BABA application on physiological, biochemical andmolecular responses of faba bean plants grown under 18%PEG-induced drought stress were investigated. The resultsshowed that the application of 1 mM of BABA improvedthe drought tolerance of faba bean. The application ofBABA increased the leaf relative water content, leaf pho-tosynthesis rate (A), transpiration rate (E), and stomatalconductance (gs), thereby decreased the water use effi-ciency. Furthermore, exogenous application of BABAdecreased production of hydrogen peroxide (H2O2),malondialdehyde and electrolyte leakage levels, leading toless cell membrane damage due to oxidative stress.Regarding osmoprotectants, BABA application enhancedthe accumulation of proline, and soluble sugars, whichcould improve the osmotic adjustment ability of faba beanunder drought challenge. Interestingly, mended antioxidantenzyme activities like catalase, guaiacol peroxidase,ascorbate peroxidase and superoxide dismutase and theirtranscript levels may lead to counteract the damagingeffects of oxidative stress and reducing the accumulation ofharmful substances in BABA-treated faba bean plants. Inaddition, exogenous BABA significantly induced theaccumulation of drought tolerance-related genes likeVfMYB,VfDHN,VfLEA,VfERF,VfNCED,VfWRKY,VfHSPandVfNACin leaves and roots, suggesting thatBABA might act as a signal molecule to regulate theexpression of drought tolerance-related genes.
Fichier	Alleviation of drought stress in faba bean (Vicia fabaL.) by exogenous application of b-aminobutyric acid (BABA)
Lien	https://doi.org/10.1007/s12298-020-00796-0
Authors	Abid, G., Ouertani, R., Jebara, S., Boubakri, H., Muhovski, Y., Ghouili, E., Abdelkarim, S., Chaieb, O., Hidri, Y., Kadri, S., El Ayed, M., Elkahoui, S., Barhoumi, F., Jebara, M.

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