Investigation of polyethylene glycol on some elements and proline of monogrem genotypes leaf of sugar beet in greenhouse conditions Journal title: Journal of Biodiversity and Environmental Sciences (JBES) Authors: Lida Issazadeh, Reza Serajamani, Mojtaba Ghasemi Fahim, Bahram Mirzamasoumzadeh Subject(s): Biological Sciences, Environmental Sciences, Biology