Water availability is a very important factor for the growth and development of plants, which limits the plant production capacity. Rootstocks are widely utilized to improve plants tolerance to various biotic and abiotic stresses. In this study, physiological and biochemical responses of fifteen almond rootstock candidates to drought stress were investigated under in vitro conditions. The shoot tips from fifteen almond rootstock candidates were cultured in MS medium containing mg/L BAP, mg/L IBA, 30 g/L sucrose and 7 g/L agar. Plantlets were exposed to 0%, 1% and 2% polyethyleneglycol (PEG) as drought stress levels during four weeks. |
