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Analysis of Plant Growth and Biochemical Parameters in Amsonia orientalis after in vitro Salt Stress
Arda Acemi,Yonca Duman,Yonca Yüzügüllü Karakuş,Yasemin Özdener Kömpe,Fazıl Özen 한국원예학회 2017 Horticulture, Environment, and Biotechnology Vol.58 No.3
This study aimed to better understand the limited natural distribution of the endangered ornamental plantAmsonia orientalis Decne. by focusing on salt stress, a common limiting factor of plant growth. Plants weresubjected to in vitro salt stress at concentrations between 25 and 150 mM. In general, shoot and root lengths, rootnumber, and total protein, chlorophyll a and carotenoid content were negatively influenced at NaCl concentrationsabove 25 mM. Hydrogen peroxide, malondialdehyde and proline content all gradually increased with increasing saltconcentration. Activity levels of the antioxidant enzymes catalase (CAT), peroxidase (POD) and superoxide dismutase(SOD) were all at their maximum in plants cultured in medium containing 50 mM NaCl. Compared to controlcultures, an overall upward trend in POD activity was observed with increasing salt concentration, while the activitylevels of SOD and CAT increased at lower concentrations but were limited at elevated concentrations of NaCl. These results suggest that A. orientalis prefers soils with no or very low salt but can tolerate NaCl up to aconcentration of 50 mM.