Journal
ACTA PHYSIOLOGIAE PLANTARUM
Volume 24, Issue 4, Pages 441-446Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11738-002-0041-5
Keywords
neutral invertase; soluble acid invertase; sucrose-phosphate synthase; sucrose synthase; sugarcane
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The activities of sucrose-phosphate synthase (SPS), sucrose synthase (SUSY), neutral invertase (NI) and soluble acid invertase (SAI) regulates sucrose activity in sugarcane were studied. Micropropagated sugarcane plants were obtained from callus cultures of four Mexican commercially available sugarcane varieties characterized by differences in sugar production, and activities of SPS, SUSY, NI, SAI and concentrations of sucrose were monitored in the sugarcane stem. The results indicated that sucrose accumulation was positively and significantly related to an increase in activity of SPS and SUSY and negatively to a reduction in activity of SAI and NI (P<0.05). SPS explained most of the variations found for sucrose accumulation and least for NI. The relationship between activity of SPS, SUSY, NI and SAI in sugarcane stem was similar in each variety.
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