Dry Weights and Germination of Developing Oat Seeds¹

Abstract

Synopsis Oat seeds reached a near‐maximum dry weight when they contained as high as 45% moisture. Very little dry matter was laid down after they dried to this moisture content. Germination increased with maturity up to 20 to 28 days after anthesis even though a few germinated when harvested 4 days after anthesis. A pregermination chilling treatment of oat seeds at 4° C. for 10 days considerably increased the germination of prematurely harvested seeds.

Increase in Dry Weight and Nitrogen Content in Barley Varieties Grown at Different Temperatures

“…The general process of ripening in cereals, especially in wheat, has been described in several papers, e.g. Brenchley (191 2), Saunders (1928), Koblet (1940), Frey et al (1958), Rawson & Evans (1970), Walpole & Morgan (1970). Duffus & Rosie (1976).…”

Development and Yield of Oat Plants Grown From Primary and Secondary Seeds

“…observed that larger oat seeds produced plants with above-average heights at maturity, Frey et al (1958) found that the oat genotypes they studied were of similar size at maturity, even though seed and seedling weights were closely correlated. Discrepancies have also been found for wheat and barley, some researchers reporting a seed size effect on plant height (Pinthus and Osher 1966;Bhatt and Derera 1973) and others the lack of an effect (Kaufmann and Guitard 196'7).…”

Grain Sorghum Caryopsis Development. I. Changes in Dry Weight, Moisture Percentage, and Viability1

“…A'L THOUGH viability and dry weight accumulation of fl. developing caryopses of wheat ( 8), oats ( 1,2), and barley ( 4) have been studied, little information of this type is available for grain sorghum. Data on viability of immature sorghum seeds should be valuable to plant breeders, and seed producers should find data on time of maximum dry weight accumulation and viability useful.…”

“…IMaximum dry weight accumulation has been reported to occur when grain moisture percentage approximated 40% in wheat and barley (5, 7,8) and 47% in bromegrass (3). Frey et al (2) have shown that differences in environmental conditions in different years may influence rate of maturation in oats.…”