Journal
BIOLOGIA PLANTARUM
Volume 44, Issue 1, Pages 117-123Publisher
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.1023/A:1017938809311
Keywords
alpha-amylase; acid invertase; cadmium toxicity; Oryza sativa; sucrose phosphate synthase; sucrose synthase
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The effect of cadmium on the content of starch and sugars, and changes in the activities of the enzymes of sugar metabolism were studied in growing seedlings of rice (Oryza sativa L.) cultivars Ratna and Jaya. During a 5- to 20-d exposure at 100 muM or 500 muM Cd(NO3)(2) in the growth medium an increase in the content of total soluble sugars and reducing sugars, and decrease in the content of non-reducing sugars was observed. Cd-induced increase in the sugar content was greater in shoots than in roots. No definite pattern of changes in starch content or in alpha -amylase activity was observed. Presence of 100 or 500 muM Cd(NO3)(2) increased the activities of sucrose degrading enzymes, acid invertase and sucrose synthase, whereas the activity of sucrose phosphate synthase declined.
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