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Yahya Abdullah Molaaldoila
M.M. Al-Aqil
A.H.A. Al-Haj
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M.M. Al-Aqil
A.H.A. Al-Haj
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International Journal of Plant Breeding and Crop Science

Physiological and biochemical response of common bean genotypes (Phaseolus vulgaris L.) treated with salicylic acid under natural drought stress

Y.A.A. Molaaldoila, M. M. Al-Aqil, A. H. A. Al-Haj

Department of Agronomy, Crop physiology, The Southern Highland Research Station (Taiz-Ibb), Yemen

Plant Breeding and Genetic. The Agricultural Research and Extension Authority (AREA), Yemen.

Plant Production, Horticulture Vegetables, Faculty of Agriculture and Vit. Med., Ibb Universiy, Yemen

The Agricultural Research and Extension Authority, Khormaksar, Aden, Yemen.

Accepted 19 October, 2016.

Citation: Molaaldoila YAA, Al-Aqil MM,  Al-Haj AHA (2017). Physiological and biochemical response of common bean genotypes (Phaseolus vulgaris L.) treated with salicylic acid under natural drought stress. International Journal of Plant Breeding and Crop Science, 4(1): 152-165.

 

Copyright: © 2017 Molaaldoila et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Abstract

A field experiment was established over three rainy seasons (2011, 2012 and 2013) at two locations (Shaban and Al-Qaidah) which represented the severe (SDS) and moderate (MDS) drought stress in the southern highlands of Yemen-Ibb. The experiment was arranged in a split plot design with three replication. The main plots were: untreated or treated seeds with 0.5 mM salicylic acid (SA), the subplot were nine CIAT bean lines and three local cultivars. The results revealed that salicylic acid improved significantly the yield and yield traits of some genotypes. Accordingly, under severe drought stress, the bean genotypes categorized into three groups; The first group (MIB-156, MIB-156, G23818B and NSL) which were high yielding and low responsiveness genotypes to SA group (HY-LSAR); The second group (BFB-139, BFB-140 and BFB-141) that perform low yielding and high responsiveness genotypes to SA (LY-HSAR) and the third group (Taiz-304, Taiz-5 and Taiz-306) that per­form low yielding and low responsiveness genotypes to SA group (LY-LSAR). It is concluded that the physiological mechanism of bean cultivars response of the high tolerant lines (LY-HSAR) and the medium tolerant lines to drought (LY-HSAR) to SA was similar by causing significant increase in dry matter accumulation, photosynthetic pigments content of leaves and accumulation of high proline content, total soluble sugars, total free amino acids, and soluble proteins, and also by maintain high relative water content (RWC%) and low leaf ion leakage (LIL%) in comparison to susceptible cultivars to drought (LY-LSAR).

Key words: Soluble proteins, proline content, photosynthetic pigments, (RWC%), (LIL%),

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