Chilling requirements of 43 apple and 38 pear cultivars
were estimated over a 2 year period by cutting shoots in the
field at weekly intervals and forcing them in a warm
greenhouse for 4 weeks. For apples, the mean values ranged
from 490 Chill Units (CU) +- 1 for 'Dorsett...
A rapid and sensitive HPLC method for quantifying both the
reduced and oxidized forms of glutathione simultaneously in woody
plant tissues was developed. This method was applicable to a variety
of woody plant species and different tissues. Total glutathione
content in the bark tissue of seven of the woody plant...
Published January 1992. Reprinted January 2000. This publication has been replaced by EM 8903. 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
Dormancy of 'Pinot Noir' grapevines was characterized. Primary buds
required ca 300 cumulative chilling hours (CCH) to initiate the transition from
endodormancy to ecodormancy, which occurred in mid November. Additional
chilling, up to 1000 CCH, improved budbreak. Changes in bud water content
were estimated by gravimetric and spectroscopic methods. Total,...
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....
Inheritance of eight enzyme systems, alanine aminopeptidase (AAP), aspartate
aminotransferase (AAT), aconitase (ACON), glucose phosphate isomerase (GPI),
malate dehydrogenase (MDH), 6-phosphogluconate dehydrogenase (6-PGD),
phosphoglucomutase (PGM), and shikimate dehydrogenase (SDH) was studied in
hazelnut (Corylus avellana L.) by either polyacrylamide gel electrophoresis
(PAGE) or starch gel electrophoresis. Three isozymes were detected...
'Amity' red raspberries, 'Chester' blackberries and 'Earliblue' blueberries were subjected to different cooling treatments at 0°C and placed in storage at 0°C. Fruits were cooled 2-4 times faster with forced-air cooling than with room cooling. Cooling treatments had no effect on decay, soluble solids content or citric and malic acid...
Alternating temperature (22°C / -1°C) pretreatments were effective for
increasing cold hardiness and recovery of cryopreserved meristems. Combining low
temperature pretreatment with abscisic acid (ABA) or sucrose treatments reduced the
time required for optimal cold hardiness of meristems. Desiccation tolerance was
directly correlated with increased cold hardiness and recovery of...