Shortening dormancy of seed potatoes by a haulm application of gibberellic acid and storage temperature regimes

1993 ◽  
Vol 70 (1) ◽  
pp. 7-19 ◽  
Author(s):  
M. K. van Ittersum ◽  
K. Scholte
Keyword(s):  
Gibberellic Acid ◽  
Storage Temperature ◽  
Seed Potatoes ◽  
Temperature Regimes ◽  
And Storage

scholarly journals Growth Regulators and Storage Temperature Govern Germination of Coreopsis Seed

HortScience ◽  
1992 ◽  
Vol 27 (11) ◽  
pp. 1190-1193 ◽  
Author(s):  
William J. Carpenter ◽  
Eric R. Ostmark
Keyword(s):  
Relative Humidity ◽  
Gibberellic Acid ◽  
Growth Regulators ◽  
Storage Temperature ◽  
Seed Storage ◽  
Temperature Regimes ◽  
Alternating Temperature ◽  
And Storage ◽  
Storage Temperatures ◽  
Growth Regulator Treatment

The storage and germination environments were evaluated to determine the cause of low total germination percentages and highly irregular germination of Coreopsis lanceolata L. seed. Highest total germination and most rapid and uniform germination of seed occurred at constant 15C, other constant temperatures and all alternating temperature regimes caused lower total germination or delayed it. Seeds tolerated -20C during storage, but total germination was reduced below -5C. Recently harvested seeds had 44% total germination, but 54% to 81% germination was achieved after 6 hours of soaking seeds in 1000 ppm GA3, 1000 ppm ethephon, or 25 ppm kinetin alone or in combination. Growth regulators reduced the number of days to 50% of final germination (T50), and the span in days between 10% and 90% of germination (T90 - T10). Storing fresh seeds without chemical treatment for > 6 months at 5C and 10% to 20% relative humidity (RH), or 15C at 20% to 35% RH, increased total germination to 75% and 80%, respectively. Ten days were required to achieve T50 after 5 to 6 months of storage at 5C and 10% to 20% RH or 15C and 10% to 40% RH, with longer periods to T50 at other storage durations and RH levels. The germination spans (T90 - T10) were lengthened the higher the seed storage temperatures between 5 to 25C, with longer spans as seed storage durations and relative humidities increased. Total germination was similar after storing seeds at 5 or 15C and 10% to 30% RH and after soaking recently harvested seeds in GA3 + ethephon, but the days to T50 and T90 - T10 were shorter after growth regulator treatment. Chemical names used: (2-chloroethyl) phosphonic acid (ethephon); gibberellic acid (GA3); 6-furfurylaminopurine (kinetin).

scholarly journals Effects of gibberellic acid and storage temperature on the germination of hawthorn seeds

2017 ◽  
Vol 63 (No. 9) ◽  
pp. 417-424 ◽  
Author(s):  
Ahmadloo Fatemeh ◽  
Kouchaksaraei Masoud Tabari ◽  
Goodarzi Gholam Reza ◽  
Salehi Azadeh
Keyword(s):  
Electrical Conductivity ◽  
Gibberellic Acid ◽  
Water Uptake ◽  
Temperature Regime ◽  
Storage Temperature ◽  
Fresh Weight ◽  
Freeze Thaw ◽  
Refrigerator Temperature ◽  
And Storage ◽  
Storage Temperatures

This study investigated methods to overcome seed dormancy in Crataegus pseudoheterophylla Pojarkova seeds. Seeds with and without endocarps were treated with gibberellic acid (GA<sub>3</sub>) at different concentrations and four storage temperatures. Then they were stratified in an alternate temperature regime. The amount of absorbed water in seeds with endocarps was monitored by measuring the fresh weight of seeds for 0, 24, 48, 72, and 96 h of imbibition. The electrical conductivity (EC) and the percentage of water uptake by seeds stored for 12 months at laboratory temperature, in a refrigerator, in a freezer, and in freeze-thaw conditions were measured. The highest germination (59.7%) was recorded in seeds without endocarps treated with 3,000 mg·l<sup>–1</sup> GA<sub>3 </sub>and stored either in a laboratory or a refrigerator (32.7–35.3%). All treatments of seeds without endocarps where GA<sub>3</sub> was applied showed statistically higher percentages of germination than the control. Seeds with endocarps stored at refrigerator temperature imbibed water up to 44.3% with increasing imbibition periods, whereas the amount of seeds that absorbed water in freezer and freeze-thaw conditions was almost the same. The tests showed the highest EC during storage in the freezer, with the lowest water uptake and viability in seeds stored during the freeze-thaw process.

Shortening dormancy of seed potatoes by storage temperature regimes

1992 ◽  
Vol 35 (4) ◽  
pp. 389-401 ◽  
Author(s):  
M. K. Ittersum ◽  
K. Scholte
Keyword(s):  
Storage Temperature ◽  
Seed Potatoes ◽  
Temperature Regimes

scholarly journals Gibberellic Acid Slows Postharvest Degreening of 'Oroblanco' Citrus Fruits

HortScience ◽  
2001 ◽  
Vol 36 (5) ◽  
pp. 937-940 ◽  
Author(s):  
Ron Porat ◽  
Xuqiao Feng ◽  
Moshe Huberman ◽  
David Galili ◽  
Raphael Goren ◽  
...  
Keyword(s):  
Gibberellic Acid ◽  
Storage Temperature ◽  
Color Change ◽  
Progressive Increase ◽  
Fruit Color ◽  
Slight Effect ◽  
Peel Color ◽  
Early Maturing ◽  
And Storage ◽  
Storage Temperatures

'Oroblanco' is an early-maturing pummelo-grapefruit hybrid (Citrus grandis Osbeck × C. paradisi Macf.). The fruit are usually picked and marketed while the peel color is still green; however, in some cases they can lose this green color during postharvest shipping and storage, which diminishes their commercial value. The effects of storage temperatures, gibberellic acid (GA), ethylene, and 1-methylcyclopropene (1-MCP) on the degreening of 'Oroblanco' fruit were examined. Storage temperature was critical for retaining fruit color: at 2 °C the fruit remained green for a period up to 5 weeks, whereas at storage temperatures of 6, 12, and 20 °C there was a progressive increase in the rate of degreening. Applications of GA, either as preharvest sprays or as postharvest dip treatments, effectively retained the green fruit color. Ethylene exposures up to 100 μL·L-1 for 3 days had only a slight effect on fruit degreening, and 1-MCP treatments up to 200 nL·L-1 for 16 hours had no effect at all. The slight influence of ethylene and the ineffectiveness of 1-MCP on fruit color change can not be attributed to difficulties in their application, since in the same experiments ethylene markedly induced peduncle abscission, and 1-MCP effectively inhibited this ethylene effect. Accordingly, ethylene had only a relatively small effect on the induction of chlorophyllase enzyme activity in green 'Oroblanco' peel tissue.

Effect of Ozone Pretreatment on Fish Storage Life at Low Temperatures

2005 ◽  
Vol 68 (4) ◽  
pp. 778-784 ◽  
Author(s):  
A. GELMAN ◽  
O. SACHS ◽  
Y. KHANIN ◽  
V. DRABKIN ◽  
L. GLATMAN
Keyword(s):  
Shelf Life ◽  
Storage Temperature ◽  
Storage Period ◽  
Control Fish ◽  
Temperature Regimes ◽  
Ozone Pretreatment ◽  
Sensory Qualities ◽  
And Storage ◽  
Storage Characteristics ◽  
Sensory Tests

The purpose of the present study was to determine the effect of ozone pretreatment of live fish on their shelf life and storage characteristics during storage at 0 and 5°C. The evaluation included sensory, chemical, physical, and bacteriological tests at set intervals throughout a storage period of 30 days under two temperature regimes (0 and 5°C). The results of the sensory tests showed that ozone pretreatment of live tilapia prolonged their shelf life by 12 days and improved their quality characteristics during storage at 0°C for 30 days. These results were corroborated by the bacteriological tests. The sensory qualities of ozone-treated tilapia stored at 5°C became unacceptable 3 days later than those of control fish. Although the most important factor affecting the fish shelf life is storage temperature, the combination of ozone pretreatment with storage at 0°C appears to be a promising means of prolonging the shelf life.

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