Hood Desiccation Leaves Performance of 16 Droughted and Irrigated Barley (Hordeum vulgare) Genotypes

Caser Abdel, Hartmout Stutzel

Abstract


Sixteen barley (Hordeum vulgare) genotypes, namely G30, G54, G65, G74, G77, G83, G94, G98, G116, G119, G126, G127, G142, G144, G154 and G169, were subjected to adequate irrigation during their growing season and to drought only during spike development stage, to evaluate the performance of leaves subjected to hood desiccations. The obtained results revealed that water loss from droughted barley substantially exceeded that of adequately irrigated barley at 3rd, 4th, 6th, and 10th hrs, after desiccation in controlled hood by 36.94, 82.06, 292.02, and 64.92%, respectively. In contrast, water loss from leaves of adequately irrigated barley were significantly higher than that of droughted leaves at 1st, 7th, 8th and 9th hrs by 58.42, 867.99,130.38 and 365.42%, respectively. The highest transpiration in irrigated genotypes at 7th hr was confined to G154 (20.247%).The highest transpiration of droughted barley at 7th hr was recorded in G65 (30.234%). On the other hand, the lowest transpiration of droughted barley genotypes was found in G119 (9.91%).Water loss from droughted leaves governed by linear type, whereas, irrigated leaves were dominated by quadratic type. Percentage water loss from water stressed leaves dominated that of irrigation from 1st to 6th then shifted for the favor of irrigated leaves from 7th to 11th hr. Genotypes can be categorized according to their drought resistance as fellow: G54, G116> G154, G94, G169, G74, G77, G144 G98, 127 > G30, G142, G126> G83, G65, G119.

Keywords


Keywords: Barley leaves desiccation, Irrigation, Drought, water stress.

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