Estimation of the course of dormancy of potato tubers during growth and storage, with the aid of gibberellic acid

1970 ◽  
Vol 13 (1) ◽  
pp. 29-40 ◽  
Author(s):  
J. Bruinsma ◽  
J. Swart
Keyword(s):  
Gibberellic Acid ◽  
Potato Tubers ◽  
And Storage

Reversal of γ-Ray-induced Dormancy of Potato Tubers by Gibberellic Acid

Nature ◽  
1961 ◽  
Vol 190 (4775) ◽  
pp. 547-548 ◽  
Author(s):  
P. B. MATHUR
Keyword(s):  
Gibberellic Acid ◽  
Potato Tubers ◽  
Γ Ray

scholarly journals Chlorogenic acid content in potato tubers with colored flesh as affected by a genotype, location and long-term storage

2019 ◽  
Vol 65 (No. 7) ◽  
pp. 355-360
Author(s):  
Matyáš Orsák ◽  
Karel Hamouz ◽  
Jaromír Lachman ◽  
Pavel Kasal
Keyword(s):  
Chlorogenic Acid ◽  
Acid Content ◽  
Field Experiments ◽  
The Other ◽  
Potato Tubers ◽  
Flesh Color ◽  
Long Term Storage ◽  
And Storage ◽  
Term Storage

In three-year field experiments, the effect of genotype, flesh color, site conditions and storage on chlorogenic acid content (CAC) in tubers of potato cultivars with purple or red flesh was compared to yellow-fleshed cv. Agria. The results confirmed the significant effect of genotype on CAC. The highest CAC was characteristic on a three-year mean for the purple-fleshed cv. Vitelotte (769.5 mg/kg fresh weight (FW)), i.e. 1.19−2.6 times higher than in the other cultivars. In regard to the effect of flesh color, significantly higher mean CAC levels have been shown for the red-fleshed (2.8 times) and purple-fleshed (3.16 times) cultivars in comparison with cv. Agria (148 mg/kg FW). At the Uhříněves location with a warmer climate and frequent dry periods as compared to the second Valečov location, a higher CAC (1.18 times) was found. Cold storage (4°C, 6 months) resulted in a significant CAC increase varying from 33.2% in the Blaue St. Galler cultivar to 210.6% in the Vitelotte cultivar among all eight evaluated color-fleshed cultivars. On the other hand, the effect of storage on CAC was not evident in the yellow-fleshed Agria cultivar (inconclusive difference against CAC after harvest).

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.

Influence of fertilizer, irrigation, and storage treatments on nitrate-N content of potato tubers

1977 ◽  
Vol 54 (4) ◽  
pp. 125-136 ◽  
Author(s):  
J. Augustin ◽  
R. E. McDole ◽  
G. C. Painter
Keyword(s):  
Potato Tubers ◽  
N Content ◽  
Nitrate N ◽  
And Storage

Studies to extend the dormancy of white yam (Dioscorea alata L)

1969 ◽  
Vol 74 (3) ◽  
pp. 213-219
Author(s):  
Maddineni M. Rao ◽  
Calixte George
Keyword(s):  
Water Treatment ◽  
Gibberellic Acid ◽  
Dioscorea Alata ◽  
Dormancy Period ◽  
Harvest Dates ◽  
White Yam ◽  
And Storage ◽  
Early Harvest ◽  
Storage Temperatures ◽  
Control Water

Two experiments were conducted in 1987-88 in St. Lucia with a view to extend the dormancy of white yam (Dioscorea alata L). Experiment 1 compared different harvest dates, different storage temperatures and presence or absence of the tuber "head" in cultivar Oriental. Experiment 2 studied the effect of gibberellic acid (GA) solution (1000 p/m) on the dormancy of different cultivars of white yam. Tubers from the early harvest (15 November) had the longest dormancy period (over 7 months), which decreased progressively with delay in harvesting. Storing yam tubers at 20 ± 2°C extended the dormancy by over 5 months as compared to storing them at 30 ± 2°C. The presence or absence of the tuber "head" had no effect. The interaction effects due to dates of harvest X storage temperatures and storage temperatures X manipulation were significant. Cultivars of white yam differed significantly in their dormancy period. Treating the harvested tubers with GA (1000 p/m) for 2 hours extended the dormancy by over 4 months as compared to that of the control (water) treatment.

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