Carbohydrate metabolism in Musa paradisiaca |
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Authors: | RN Shukla Surjeet Singh Nibhriti Das Madhulika Baijal GG Sanwal |
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Institution: | Department of Biochemistry, Lucknow University, Lucknow, U.P. India |
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Abstract: | Considerable variations exist in the content of glucose, fructose, sucrose, starch and protein and in the activities of enzymes involved in carbohydrate metabolism between different parts of the banana plant (Musa paradisiaca). Sucrose synthetase is present in the highest concentration in rootstock and fruit pulp, and sucrose phosphate synthetase in the pseudostem. The highest ratio of the activity of sucrose phosphate synthetase to sucrose synthetase is found in leaves. Acid invertase is present in leaves, leaf-sheath and fruit pulp and is not demonstrable in rootstock and pseudostem. Neutral invertase activity is high in pseudostem and leaf-sheath. Starch phosphorylase is largely concentrated in fruit pulp and rootstock. The maximum activity of ATP:d-phosphoglucose (ADPG) pyrophosphorylase is found in rootstock. β-Amylase is not demonstrable in rootstock and is largely concentrated in leaf-sheath. Hexokinase is most active in rootstock and the lowest in leaves. Acid phosphatase and alkaline phosphatase activity is highest in fruit pulp and pseudostem. Glucosephosphate isomerase is most active in the rootstock and lowest in the leaves. |
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Keywords: | Musocene banana glucose fructose sucrose starch sucrose synthetase sucrose phosphate synthetase acid- and neutral invertase ADPG-pyrophosphorylase starch phosphorylase β-amylase hexokinase glucosephosphate isomerase acid- and alkaline phosphatase |
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