HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Widstrom, N. W. Articles by Black, L. T. Search for Related Content PubMed Articles by Widstrom, N. W. Articles by Black, L. T. Agricola Articles by Widstrom, N. W. Articles by Black, L. T.

Distribution of Sugar and Soluble Solids in the Maize Stalk

USDA-ARS-IBPMRL, P.O. Box 748, Tifton, GA 31793

M. E. Carr, M. O. Bagby and L. T. Black

USDA-ARS-NRRC, Peoria, IL 61604

^* Corresponding author.

Limited worldwide energy sources have encouraged the search for energy alternatives such as stalk sugar in maize, Zea Mays L. Information on the distribution and amount of sugars and soluble solids found in maize stalks will be important if the maize plant is to be exploited for its total energy production. The objective of this study was to determine the distribution of soluble solids in the stalks of three maize hybrids. Three field plantings of five replicates were made at 4-wk intervals in 1981,1982, and 1983. Juice was sampled from each of the first ten internodes of two plants from each plot and a Brix reading taken by hand-held refractometer. In 1983, internode samples from each node in each plot were bulked and analyzed for sugar content using High Performance Liquid Chromotography (HPLC). Significant variation for soluble solids occurred among years, hybrids, and nodes. An older hybrid, developed for the South, had stalks that tended to increase in soluble solids concentration from bottom to the top of the plant. Two more recently developed hybrids decreased in soluble solids concentration from soil level upward toward the ear node, but increased from the ear node upward. The change or difference in pattern of soluble solids gradients for the more recently developed hybrids was attributed in part to selection for increased resistance to stalk rot, which is positively correlated with sugar content.

Received for publication January 8, 1988.