The effect of drought and salinity stresses on germination and physiological characteristics of goji berry (Lycium barbarum)

Document Type : Research Paper

Authors

1 Department of Plant Productions, Agricultural Faculty of Bardsir, Shahid Bahonar University of Kerman, Kerman, Iran

2 Department of Agronomy, Shahid Bahonar University of Kerman, Kerman, Iran

10.22124/jms.2022.6165

Abstract

This study was done to investigate the germination response of goji berry to salinity, drought and salinity-drought stress. For this purpose, a factorial experiment based on completely randomized design in the research laboratory of Bradsir Agricultural Excellence Training Center in 2021 was conducted. In this research, goji berry responses were examined to four levels of polyethylene glycol 6000 to create drought stress (0, -2, -4 and -8 bar) and four levels of sodium chloride to create salinity stress (0, -2, -4 and -8 bar) in the germination stage. The results showed that with decreasing osmotic potential in drought and salinity stresses, germination percentage and germination rate, seedling dry weight and relative water content decreased but relative electrolyte leakage and proline content increased. In general, goji berry seeds withstood drought stress conditions better than salinity stress in terms of germination components, so that in the osmotic potential of -8 bar salinity stress, goji berry seeds were not able to germinate and did not produce any shoots and roots. In osmotic potential of -2 bar, germination rate and relative water content in drought stress decreased by 4.56% and 0.47%, respectively, and in salinity stress decreased by 30.18% and 18.24%, respectively, but relative electrolyte leakage increased in drought and salinity stress by 0.57% and 10.89%, respectively.

Keywords


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