Plants are autotrophic and photosynthetic organisms that both produce and consume sugars. Soluble sugars are highly sensitive to environmental stresses, which act on the supply of carbohydrates from source organs to sink ones. Sucrose and hexoses both play dual functions in gene regulation as exemplified by the upregulation of growth-related genes and downregulation of stress-related genes. However, we think that forward and reverse genetic analysis in combination with expression profiling must be continued to uncover many signalling components, and a full biochemical characterization of the signalling complexes will be required to determine specificity and cross-talk in abiotic stress signalling pathways. One part of the shoots was processed for controlled freezing test to measure electrolyte leakage. Other part of the shoots was used in sugars and enzyme analysis. lants are autotrophic and photosynthetic organisms that both produce and consume sugar; however, they can act as carbon heterotrophs during some part of their life cycle or in some of their non-green organs like roots, stems and flowers that are not involved in photosynthesis.