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Changes in Leaf Area and Specific Leaf Weight of Sugarbeet Leaves during the Growing Season¹

The purpose of this investigation was to observe the rate of leaf accretion and changes in specific leaf weight (SLW) of sugarbeet leaves initiated during the latter portion of the growing season. Leaves increased in area at a rapid rate during the first 14 days after leaf emergence. Specific leaf weight changed as the leaves expanded in area. Diurnal changes in SLW may be related to changes in temperature incoming radiation, or translocation rates. Leaves initiated late in the growing season were smaller and had a higher SLW than leaves initiated earlier in the growing season.

Key Words: Cultivar • Leaf initiation

² Research plant physiologist, ARS, USDA, and adjunct professor of agronomy.

Received for publication May 10, 1975.