Effects of drought, transgenic expression of a fructan synthesizing enzyme and of mycorrhizal symbiosis on growth and soluble carbohydrate pools in tobacco plants

azucares barley carbohidratos carbohydrates cebada drought drought resistance fructosa fructose gene expression genetic transformation glomus glomus mosseae glucide growth rate hordeum vulgare mycorrhizae nicotiana tabacum orge saccharose simbiosis sucres sucrosa sucrose sugars symbiose symbiosis tabac tabaco taux de croissance tobacco transgenic plants transgenics trehalosa trehalose