biologia plantarum

International journal on Plant Life established by Bohumil Nìmec in 1959

Biologia plantarum 42:233-239, 1999 | DOI: 10.1023/A:1002160618700

Salinity Induces Accumulation of Soluble Sugars and Alters the Activity of Sugar Metabolising Enzymes in Rice Plants

R.S. Dubey1, A.K. Singh1
1 Department of Biochemistry, Faculty of Science, Banaras Hindu University, Varanasi, India

Changes in the starch and sucrose contents, and the sucrose phosphate synthase, acid invertase, and starch phosphorylase activities were studied in the seedlings of salt sensitive and salt tolerant rice cultivars growing under two NaCl concentrations (7 and 14 dS m-1) for 20 d. Under salinity, the starch content in roots declined more in salt sensitive cvs. Ratna and Jaya than in salt tolerant cvs. CSR-1 and CSR-3 and was unchanged in shoots. The contents of reducing and non-reducing sugars, and the activity of sucrose phosphate synthase was increased more in the sensitive than in the tolerant cultivars. Acid invertase activity decreased in shoots of the salt tolerant cultivars, whereas increased in salt sensitive cultivars. Starch phosphorylase activity decreased in all cultivars.

Keywords: acid invertase; Oryza sativa; starch phosphorylase; sucrose phosphate synthase
Subjects: acid invertase, salinity; NaCl tolerance, sugar metabolism; Oryza sativa; rice, sugar metabolism; salinity, sugar metabolism; starch phosphorylase, salinity; sucrose phosphate synthase, salinity; sugar metabolism, salinity

Published: September 1, 1999  Show citation

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Dubey, R.S., & Singh, A.K. (1999). Salinity Induces Accumulation of Soluble Sugars and Alters the Activity of Sugar Metabolising Enzymes in Rice Plants. Biologia plantarum, 42(2), 233-239. doi: 10.1023/A:1002160618700
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