Somaclonal variation that possibly occurs during the process of plant tissue culture is considered to provide a source of new germplasm. Polyploidy is one of the most frequent incidents among the somaclonal variations. In the present study, we performed cytological and morphological characterization of tetraploid plants that were obtained from long-term subcultured callus culture of Lilium long...

Abstract Phyto-hormones play a key role in regulating plant responses to stress. Cytokines are type of phyto-hormones involved the regulation many important biological processes related growth, development, and response environmental variables. The exogenous application cytokines increases possibility delaying senescence; however, this is physiological process, and, under certain conditions, de...