Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 12:654-657 (1972)
© 1972 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Ripening Activity of C.P.41845 in Sugarcane Having Nitrate-and Gibberellic Acid-Stimulated Growth Regimes

A. G. Alexander and R. Montalvo-Zapata2

Ripening activity of C.PA1845, a Monsanto product with growth-regulatory properties, was examined in immature sugarcane (Saccharum officinarum L.) having divergent growth regimes produced by variable nitrate and gibberellic acid. Plants were propagated in quartz sand with controlled moisture and nutrient supplies. Significant ripening activity was attained with 0.30% C.P.41845 within NO3 and GA regimes highly favorable to growth and sugar utilization rather than sugar accumulation. Growth restriction per se was not needed to produce sugar accumulation. Sucrose, water-soluble protein, and acid-invertase levels in immature storage tissue were more sensitive to C.P.41845 action than were growth parameters. Results were consistent with the theory that sugarcane's rapid growth phase can be extended to within a few weeks of harvest with reasonable assurance that ripening can still be accomplished by chemical means.

Key Words: Saccharum officinarum (L.) • Chemical ripening • Growth control • Acid invertase • Inversion control


2 Plant Physiologist and Assistant Chemist, respectively, Agricultural Experiment Station, University of Puerto Rico, Mayaguez Campus, Rio Piedras, Puerto Rico. 00928.

Received for publication January 11, 1972.





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