PJB-2021-519
Effect of salinity on growth and physiology of Thellungiella halophila L. ecotypes
Zahoor Ahmad Sajid
Abstract
The influence of salinity on seed germination, growth, and water relations of four Chinese [Hebei (HB), Henan (HN), Shandong (SH), or Jiangsu (JS)] and four North American [Cracker Creek (CC), Colorado (CO), Dillibrough (DB), or Yukon (YK)] ecotypes of Thellungiella halophila was investigated. The goal of this study was to identify superior or inferior ecotypes, related to the mean population, for eventual identification of the growth and physiological basis for salt tolerance in this new model species. Germination of seeds was completely diminished in all ecotypes above 200 mM NaCl. Seedlings of CC, CO, DB and SH had higher root growth at 100 mM than other ecotypes. North American ecotypes showed less shoot dry weight% in control compared to Chinese ecotypes. Colorado showed maximum shoot and root% of control compared to all other ecotypes. Chinese ecotypes showed less increase in leaf specific weight compared to North American ecotypes. In case of relative water content and leaf succulence an increasing trend was observed up to 400 mM NaCl. North American ecotypes showed decreasing, but Chinese showed increasing trend at low salt concentration (200 mM) and decreasing at higher level of salt (600 mM). Shoot osmotic potential decreased with increasing concentration of salt from 0-300 mM but an increasing trend was observed by increasing salt concentration in the medium between root and leaves
To Cite this article:
Sajid, Z.A. 2023. Effect of salinity on growth and physiology of Thellungiella halophila L. ecotypes. Pak. J. Bot., 55(1): DOI: http://dx.doi.org/10.30848/PJB2023-1(9)
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