Responses of five water stressed fababean (Vicia faba L.)‎ cultivars to exogenous Abscisic Acia application

الملخص EN

Five fababean cultivars namely Aquadulce, Local Syrian, Taka 357, Twowaytha and Babylon were water-stressed to wilt, and then they were re-watered and immediately sprayed by 0.0, 2x10-6 M ABA or 2x10-3 M ABA to evaluate their adaptation to resist drought throughout their responses to varying ABA rates.

The results revealed that Aquadulce is the most drought resistance cultivar; this can be ascertained by its prominent yield of dry seeds (33.03 g.plant-1), stomata aperture length of upper and lower leaf surfaces (6.7 and 7.1μm, respectively), aperture width of upper and lower leaf surface stomata (1.4 and 1.9μm, respectively).

Negligible differences were detected between Aquadulce and Local Syrian cultivars.

Moreover, the latter cultivar revealed unequivocal yield of mature pods (91.33 g.plant-1).

Exogenous ABA application highly improved the drought resistance capabilities of most cultivars, particularly interaction treatment of Aquadulce and 2x10-3 M ABA, which showed profound dry seeds yield per plant (42.93 g), stomata aperture length of upper and lower leaf surfaces (6.89 and 6.6μm, respectively), stomata aperture width of upper and lower leaf surfaces (1.8 and 2.1μm, respectively).

ABA application slightly affected all detected traits