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 HighWire Citing Articles via Google Scholar Google Scholar Articles by Hanson, W. D. Search for Related Content PubMed Articles by Hanson, W. D. Agricola Articles by Hanson, W. D.

Control of Dry Matter Accumulation in Soybean Seeds¹

Seed development was characterized for greenhouse-grown soybean genotypes [Glycine max (L.) Merr.] representing 12 selections differing in petiole diameters and 12 selections differing in seed size. The objective was to evaluate regulation of dry matter accumulation by seeds. Sucrose release rates per square meter (SRRA) and per seed coat (SRRT) from opened seed coats into 0.2 M sorbitol, adjusted for sucrose exudate from cut pod walls, and dry matter accumulation rates per seed (DMAR) were selected to characterize seed development. Six measures, selected as x variables, were grouped into two sets of closely correlated variables: Group 1 (petiole area and leaf area) and Group 2 (area of seed-coat cup, seed-coat area, weight per seed, and seed number). Highly significant differences were found among genotypes for SRRA, SRRT, and DMAR. The DMAR variability among genotypes was explained by the regression of DMAR on the six x variables with Group 2 variables being of primary importance. The DMAR per unit seed-coat area or per plant were similar among groups of genotypes differing in seed size. The SRR measures were associated with Group 1 variables with petiole area being most important. The SRRA measure was also associated with leaf area. The SRR measures and DMAR were not associated. The SRR measures reflected (presumed) transport capacity with no tie to the control of DMAR. No evidence was found using this technique, for a control operating at the seed-coat level that affected SRR and DMAR. Dry matter accumulation rates per plant reflected primarily a genetically controlled balance operating at a level other than the seed.

Key Words: Glycine max (L.) Merr. • Source-sink relations • Sucrose unloading • Seed-coat efflux • Seed growth rate

² Professor of genetics, Dep. of Genetics, Box 7614, North Carolina State Univ., Raleigh, NC 27695-7614.

Received for publication November 18, 1985.

This article has been cited by other articles:

				P. Pedersen and J. G. Lauer Response of Soybean Yield Components to Management System and Planting Date Agron. J., September 1, 2004; 96(5): 1372 - 1381. [Abstract] [Full Text] [PDF]