Paper Details

Morpho-Physiological, biochemical and developmental responses of diploid cotton (Gossypium arboreum L.) cultivars under varying NaCl stress

Sameera Hassan, Sajjad Sadique, Muhammad Bilal Sarwar, Bushra Rashid, Tayyab Husnain

DOI: https://dx.doi.org/10.12692/ijb/6.12.9-20

Int. J. Biosci. 6(12), 9-20. June, 2015. (PDF)

Abstract:

Salinity is one of the severe environmental factors limiting cotton productivity. The present study aimed to investigate the salt stress response of diploid cotton (Gossypium arboreum L.) cultivars commonly cultivated in the region. The plant developmental, biochemical and physiological responses of desi cotton varieties FDH 171 and FDH 786 under NaCl stress (100, 150 and 200 mM) were evaluated. Root and shoot length and seedling vigor were reduced, but root: shoot was gradually increased as the plants were subjected to increased stress of NaCl. Leaf relative water content and turgor potential were reduced when the NaCl stress was increased gradually. Decrease in osmotic and water potential imposed and maintained the physiological mechanism of the plants. Biochemical processes, including chlorophyll content, proline and soluble sugars under salt stress justify the reduction of cellular osmotic potential. Consequently, the genotypes FDH 171 & FDH 786 were suitably adapted under NaCl stress. These genotypes can be an excellent source for breeding and cotton improvement program for salinity tolerance.