Study of Salinity Stress Effect on Two Commercial Varieties of Potato (Solanum tuberosum L.) After Transmitting to Green House from In vitro Culture

摘要

The culture of potato in saline lands has broadly significance in Iran. Fifteen percent of total lands in Iran include saline and semi saline lands. The reaction of cultivars of potato to salinity is different. Agria cultivar is less sensitive to salinity stress in comparison with Marphona cultivar. In this research the effect of different salinity concentrations (0, 50, 100 and 150) mg/l NaCl was investigated in green house conditions on Agria and Marphona cultivars to evaluate their reaction to salinity. At first, the grown plantlets in MS medium without hormone were sent out from growth chamber and transmitted to the vases with 30 centimeter length in which the mixture soil of sand pith and perlite disinfected with fungicide captain 1/ and the vase were set 1000 in tunnel. After a week, the vases were sent out from tunnel, placed in green house conditions; and different salinity concentrations (0, 50, 100 and 150) mg/l NaCl was implemented on them. After two months, plantlets were sent out from vases and measured the number, length and diameter of lateral branch; the number, weight, diameter and buds mini tubers. The result showed varieties of potato (Solanum tuberosum L.) has important role in the reaction to salinity stress. Salinity stress in Agria variety has a stimulated effect on the number of mini tubers but the diameter and number of buds mini tubers decreased with the increase of salinity stress