Barakat MN & Abdel Latif TH 1995 In vitro selections of drought tolerant lines in wheat effect of PEG: Alexandria J. Agri. Res. 40 (1): 77.
Bi RM Kou M Chen LG Mao SR & Wang HG 2007 Plant regeneration through callus initiation from mature embryo of Triticum. Plant Breeding 126, 9-12
Chandrasekhara Reddy P Vajranabhaiah SN & Prakash AH 1994 Varietal response of upland rice calli to polyethylene glycol (PEG-6000) stress. Adv. Plant Sci. 7: 12.