Niyayesh Farrokhmanesh, Ahmad Reza Golparvar, Davoud Naderi
Department of Plant Breeding, College of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
Department of Horticulture, College of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
Key words: Portulaca oleracea L., salinity, shoot, sodium, tolerance.
Portulaca oleracea L. is an annual halophyte that can resist salinity as vegetable, forage or medicinal plant. In order to study the effects of different salinity levels on some morphological and chemical properties and salinity tolerance of Portulaca oleracea L. a factorial experiment was carried out using randomized complete block design with different salinity levels (0, 7, and 25 deci-Siemens/m) on Portulaca oleracea genotypes. Three replications were used and the experiment was conducted in 2013 in the research greenhouse of Islamic Azad University, Isfahan (Khorasgan) Branch. Research results revealed that values of plant height, dry weight of shoot, root wet weight, shoot sodium content, root sodium content, root potassium, ratio of potassium to sodium in shoot, the ratio of potassium to sodium in root were significantly different from the values obtained for the control group. On the other hand, values of root wet weight and shoot dry weight did not differ significantly to a salinity level of 7 deci-Siemens. However, at the 25 deci-Siemens salinity level a significant reduction was observed in the aforementioned values. Examination results indicated that this plant is highly resistant to salinity while genotypes obtained from Ahwaz, Mashhad, and Miandoab also demonstrated a high level of resistance to a salinity of 25 deci-Siemens. Therefore, this plant can be used as a medicinal plant in areas under salinity stress.
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