Rubus spp. seeds have a thick protective endocarp and testa (seedcoat) that can
restrict germination even under favorable conditions. The effect of pregermination
treatments were studied in Rubus chamaemorus L., R. eustephanos Focke ex Diels, R.
idaeus 'Amber' L., R. leucodermis Douglas ex Torrey & A. Gray, R. multibracteatus A....
Rubus seed characteristics; seed coat morphology, anatomy, germination requirements and dormancy were studied in order to define protocols for breaking seed dormancy. Morphological analysis of the seed coat (testa) using scanning electron microscopy (SEM) included 56 seed accessions of 10 subgenera preserved in the collections of the US Department of...
The tissue and substrate degradational enzymes, acid hydrolases,
in endosperm were studied in order to discern the mechanism of seed
shriveling in triticale (XTriticosecale Wittmack).
Acid hydrolases in crude extract of 7-week-old developing
endosperm of 2 lines each of triticale with shriveled (6TB,JZBS) and
plump seeds (6TA, RBP) were successfully...
Germinating seeds often encounter stress conditions
of temperature, moisture and oxygen in the field.
Germination tests conducted under these stress conditions
in the laboratory might be methods of differentiating high
and low vigor seeds.
The objectives of this study were to (1) determine
if these stress conditions reduce germination performance...
The nature of the isoprenoid pathway and diversity of biologically
significant products suggests that the pathway may be highly regulated,
particularly under stress conditions, where the availability of high
energy intermediates is limited. It was postulated that germinating
seeds suffer from a limited supply of available energy and must therefore...
Managing cattle to disseminate seeds of desirable plants, or alternatively, to restrict
weed seed contamination on rangelands is of interest to managers. Four experiments were
conducted to determine effects of ruminant digestion on germination of ingested seeds. A
number of plant species representing a variety of seed size and seed...
Published August 1981. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog