scholarly journals STORAGE OF TRUE POTATO SEED

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 577c-577
Author(s):  
Noël Pallais
Keyword(s):  
Moisture Content ◽  
Seed Dormancy ◽  
Potato Seed ◽  
True Potato Seed ◽  
Seedling Vigor ◽  
High Moisture ◽  
Seed Moisture Content ◽  
Moisture Contents ◽  
Seed Moisture

True potato seed of Atzimba × 104.12LB (intermediate dormancy) was dried to seed moisture contents ranging from 3.85 to 12.5% (dry wt basis) and was stored for 2 years at 30, 15 and 5°C. Seed was tested for various germination and seedling vigor criteria at 4 month intervals. Seed dormancy and viability were better preserved at seed moisture levels below 7% and as temperature decreased. High moisture (>9%) was lethal to seed stored at 30°C. TPS should be stored at <5% seed moisture content. Under this condition seed dormancy in the genotype studied was lost after about 12 months at 30°C.

Studies on the use of mutagenic agents in plant breeding. II. The effects of dose and seed moisture content on mutation production in Lupinus angustifolius by X-Rays

1965 ◽  
Vol 16 (3) ◽  
pp. 301 ◽  
Author(s):  
JS Gladstones ◽  
CM Francis
Keyword(s):  
Moisture Content ◽  
Mutation Rate ◽  
Lupinus Angustifolius ◽  
Mutation Rates ◽  
X Rays ◽  
High Moisture ◽  
Seed Moisture Content ◽  
Moisture Contents ◽  
Seed Moisture ◽  
Wet Weight

Seeds of Lupinus angustifolius were given X-ray doses of 2.5, 5, 10, and 20 kr at each of 12 moisture contents ranging from 6.1 to 18.1 % (wet weight basis). Various measures of injury were recorded in the X1 generation, and the types and rates of mutations in the X2. At moisture contents below 16%, total mutation rates were closely correlated with X1 injury. Injury and mutation rate decreased with increasing moisture up to 11–12% moisture, and thereafter remained at a constant minimum up to 16%. Between 16 and 18% moisture there was again an increase in X1 injury, but not in mutation rate. Between 6 and 12 % moisture, a linear relationship was found between moisture content and the logarithm of the dose required to cause a given level of injury or mutation. A possible mechanism for such a pattern of protection is discussed. Lethal mutations increased as a proportion of all mutations as dose and mutation rate increased. There were also proportionately more lethals at high moisture contents than in lower moisture treatments giving the same mutation rates. It is concluded that lethal and seedling chlorophyll-deficient mutations could be misleading when used as indicators of total and viable mutation rates, and that, contrary to the conclusions of some previous authors, no advantage is likely to be gained in practical breeding work from irradiating at high seed moisture contents.

scholarly journals Effects of X-ray Radiation on Oat Seed

1969 ◽  
Vol 41 (4) ◽  
pp. 242-258
Author(s):  
Raul Abrams
Keyword(s):  
Moisture Content ◽  
Environmental Conditions ◽  
Seedling Vigor ◽  
High Moisture Content ◽  
High Moisture ◽  
Seed Moisture Content ◽  
X Ray ◽  
Seed Moisture ◽  
Successive Generations

In a study involving the treatment of oat seed of six varieties—Simcoe, Park, Bonham, Mo. 0-205, C. I. 6748, and Chintland, with high X-ray dosages, the data indicated that: 1. Recurrent radiation of oat seed in successive generations tended to increase their sensitivity to X-ray treatment when measured by the number of seed killed. 2. Seedlings produced from seed radiated in two or three successive generations were taller and more vigorous than those from seed radiated only once, when the X-ray dosage was 30,000 r and the seed moisture content was approximately 20 percent. With an X-ray dosage of 40,000 r and a seed moisture content of approximately 14 percent the plant heights and seedling vigor from all seed lots were virtually the same. 3. The seed with the high moisture content and lowest X-ray dosage produced the lowest germination percentages and underwent the greatest reduction in plant heights and seedling vigor. 4. Four oat varieties—Mo. 0-205, Bonham, Simcoe, and Park—produced under similar environmental conditions differed in their sensitivity to X-ray damage.

Leek (Allium porrum L.) seed development and germination

1992 ◽  
Vol 2 (2) ◽  
pp. 89-95 ◽  
Author(s):  
D. Gray ◽  
J. R. A. Steckel ◽  
L. J. Hands
Keyword(s):  
Moisture Content ◽  
Seed Development ◽  
Developmental Stages ◽  
Dry Weight ◽  
Allium Porrum ◽  
Seed Moisture Content ◽  
Subsequent Performance ◽  
Moisture Contents ◽  
Seed Moisture ◽  
Seed Growth

AbstractThe effects of development of leek seeds at 20/10°, 25/15° and 30/20°C (day/night) and drying of seed harvested at different developmental stages on subsequent performance were examined in each of 3 years. An increase in temperature from 20/10° to 30/20°C reduced mean seed weight from 2.90 to 2.55 mg as a result of a reduction in the duration of seed growth from 80 to 55 days; seed growth rate was unaffected. Seed moisture content reached a minimum, up to 35 days after the attainment of maximum seed dry weight and 115, 90 and 70 days after anthesis at 20/10°, 25/15° and 30/20°C, respectively. The curves relating seed moisture to time for each temperature regime were mapped onto a single line accounting for >90% of the variation in moisture content, using accumulated day-degrees >6°C instead of chronological time. Seeds were capable of germinating when seed moisture contents were >60% (fresh weight basis), but maximum viability and minimum mean time to germination were not attained until seed moisture contents at harvest had fallen to 20–30%. Germination was little affected by temperature of seed development. Drying immature seeds increased percentage germination. Growing seeds at 30/20°C and drying at 35°C and 30% RH raised the upper temperature limit of germination compared with growing at 20/10°C and drying at 15°C and 30% RH.

scholarly journals Moisture Contents in Bottle Gourd Seeds during Dry Heat Treatment and Subsequent Germination

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 758D-759
Author(s):  
Seung-Hee Lee* ◽  
Jin-Seok Kim ◽  
Jung-Myung Lee
Keyword(s):  
Heat Treatment ◽  
Moisture Content ◽  
Value Added ◽  
Bottle Gourd ◽  
Maximum Temperature ◽  
Seed Moisture Content ◽  
Dry Heat ◽  
Moisture Contents ◽  
Seed Moisture ◽  
Dry Heat Treatment

Dry heat treatment (DHT), a powerful and agrochemical-free means of inactivating seed-borne virus and other pathogens, has been extensively used for value-added vegetable seeds in Korea, Japan, and some other countries. Since seeds are treated with extremely high heat (75 °C or higher) for a long time (72 h or longer), heat-induced phytotoxicity symptoms are frequently observed. Even though various internal and external factors, such as seed maturity and vigor, maximum temperature and duration of DHT, are known to influence the severity of phytotoxicity, precise control of seed moisture contents during DHT is regarded as one of the most important factors for successful DHT. In an ideal condition using a specifically designed DTH machine, seed moisture content of bottle gourd, initially around 6.20% to 0.64% when stored in a storage room with 50% RH, decreased by 1% after 24 h at 35 °C (5.20% to 0.23%), and further decreased below 4% after 24 h pretreatment at 50 °C (3.64% to 0.37%). The seed moisture content was further reduced down to about 2% after 72 h DHT at 75 °C (2.16% to 0.28%). During the post-treatment conditioning at 50 °C and 70% RH for 24 h, the moisture contents were raised to about 6%(5.94% to 0.45%), thus approaching the initial moisture content of 6% to 7%. During the germination period, treated seeds showed slower absorption of water as compared to the intact seeds, thus suggesting that this slow absorption of initial moisture absorption may be responsible for the slow initial germination frequently observed in treated seeds. Final germination and seedling vigor were not affected by DHT.

scholarly journals INFLUENCE OF SOYBEAN SEED MOISTURE CONTENT IN THE RESPONSE TO SEED TREATMENT IN SOYBEAN

2018 ◽  
Vol 5 (2) ◽  
pp. 91-96 ◽  
Author(s):  
Marcos Altomani Neves Dias ◽  
André Kitaro Mocelin Urano ◽  
Deborah Bueno Da Silva ◽  
Silvio Moure Cicero
Keyword(s):  
Moisture Content ◽  
Seed Treatment ◽  
Soybean Seed ◽  
Soybean Seeds ◽  
High Moisture ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Physiological Quality ◽  
Seed Respiration ◽  
Key Parameter

Seed treatment (ST) is an important practice for soybean crop. This research had the objective to evaluate the influence of seed moisture content in the response to different spray volumes (SV) used for seed treatment in soybean, considering effects on seed physiological quality. Three seed lots with distinct moistures were used: 7.2%, 10.1% and 13.0%. Untreated seeds (control) and three SV were tested: 8, 13 and 18 mL kg-1. All lots received the same treatment combination, containing insecticide, fungicide, fertilizer and biostimulant. This combination represented 8 mL kg-1 of SV; the doses of 13 and 18 mL kg-1 were obtained by adding 5 and 10 mL kg-1 of water, respectively. Evaluations of seed physiological quality consisted of electrical conductivity, seed respiration, germination and vigor tests. Results of all tests demonstrates that low-moisture soybean seeds (7.2%) are negatively affected by seed treatment within an SV range of 8 to 18 mL kg-1, while untreated seeds with equal moisture are not affected. Oppositely, high-moisture seeds (13.0%) are not affected by the SV tested, while intermediate-moisture seeds (10.1%) are affected by the higher SV. This result highlights seed moisture as a key parameter to be managed before soybean ST, aiming to maintain a high physiological quality.

scholarly journals Performance Evaluation of a Melon Shelling Machine with Different Power Sources

2021 ◽  
Vol 6 (2) ◽  
Author(s):  
Temidayo C. Esenamunjor ◽  
Ugwu H. Ubabuike
Keyword(s):  
Performance Evaluation ◽  
Moisture Content ◽  
Throughput Capacity ◽  
Seed Moisture Content ◽  
Power Sources ◽  
Moisture Contents ◽  
Seed Damage ◽  
Seed Moisture ◽  
Machine Productivity ◽  
Melon Seeds

Performance evaluation of an electric motor and a fuel-engine powered machine used for shelling melon seeds was performed in this study to determine the effects of shelling speed and moisture content on machine productivity. The melon seeds used for the evaluation of the existing melon shelling machine were sourced locally from Umungasi market in Aba, Abia state, Nigeria. The unshelled melon seeds as used were weighed (25g each), sprinkled with water and partially dried with natural air for 25 minutes. This enabled the skin coat became slightly softened and the cotyledon easily detached from the shell, thus making the shelling more efficient. To evaluate the parameters (machine productivity, throughput capacity and percentage seed damage), the melon seeds were employed. For the shelling performance, melon seeds of five different moisture contents (7.48, 10.24, 13.92, 18.36, 21.44%) dry basis (d.b.) at different shelling speeds (850, 1000 and 1200 rpm) were utilized in the evaluation. From the evaluation, results revealed that the machine has an optimal productivity of over 83% and percentage seed damage of 14.2% at seed moisture content of 21.44% and drum speed of 1200 rpm for both power sources. Maximum machine throughput capacity of over 940 kg/h was recorded at 1200 rpm and 21.44% moisture content for both power sources. Overall, results obtained indicated that the machine can effectively shell melon seeds and that seed moisture contents and shelling speed affected the machine productivity.Keywords— Performance operation, evaluation, motorized, melon, shelling machine

Determination of seed moisture content in small-seeded pasture legumes

1987 ◽  
Vol 27 (3) ◽  
pp. 377 ◽  
Author(s):  
GB Taylor
Keyword(s):  
Moisture Content ◽  
Seed Moisture Content ◽  
Constant Weight ◽  
Reliable Technique ◽  
Seed Testing ◽  
Moisture Contents ◽  
Pasture Legumes ◽  
Seed Moisture ◽  
Improved Technique

An improved technique for the determination of seed moisture content in small-seeded annual legumes is described. Changes in weight of permeable and impermeable seed of Medicago truncatula, M. polymorpha and Trifolium subterraneurn, which were either left intact or cut in half, were measured in air-ovens at 105 and 130�C. Drying intact seeds for 1 h at 130�C, as specified by the International Seed Testing Association, seriously underestimated moisture content in most seed samples. Seeds dried to approximately constant weight at 130�C appeared to overestimate moisture contents by about 1%, presumably because of volatilisation losses of material other than unbound water. At 105�C, halved seeds lost weight rapidly during the first day then slightly gained weight for several days before resuming a gradual weight loss. Drying intact seeds of M. truncatula and T. subterraneurn at 105�C for 2 days gave seed moisture contents similar to those obtained from halved seeds. Intact impermeable seeds of M. polymorpha were very much slower than those of the other species to lose weight. taking 14 days to approach an apparent moisture content close to that of halved seeds. Drying halved seeds for 24 h at 105�C appears the most reliable technique.

EFFECT OF SEED MOISTURE CONTENT AT SWATHING ON EMERGENCE OF FALL RYE

1978 ◽  
Vol 58 (2) ◽  
pp. 557-560
Author(s):  
R. M. DE PAUW
Keyword(s):  
Moisture Content ◽  
Secale Cereale ◽  
Seed Treatment ◽  
Seedling Emergence ◽  
Seed Moisture Content ◽  
Moisture Contents ◽  
Seed Moisture ◽  
Secale Cereale L ◽  
The Absolute ◽  
Absolute Duration

The after-ripening requirement of three fall rye (Secale cereale L.) cultivars, harvested at three seed moisture contents (50, 42, and 32%), was assessed by monitoring the changes in seedling emergence from sowings made over a period of 60 days. All cultivars exhibited a short after-ripening requirement of 1–7 days. The absolute duration of the after-ripening requirement was not affected by the range of seed moisture contents studied. Seed treatment with captan [N[(trichloromethyl) thiol]-4-cyclohexene-1,2-dicarboximide] significantly increased percent seedling emergence. The captan treatment had the greatest effect on seeds harvested at the lowest moisture content.

scholarly journals Evaluation of Temperature and Moisture Content during Storage on the Germination of Flowering Annual Seed

HortScience ◽  
1995 ◽  
Vol 30 (5) ◽  
pp. 1003-1006 ◽  
Author(s):  
William J. Carpenter ◽  
Eric R. Ostmark ◽  
John A. Cornell
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
Seed Storage ◽  
Seed Moisture Content ◽  
Moisture Contents ◽  
Seed Moisture ◽  
Storage Temperatures

Various combinations of temperature and moisture contents were used in evaluating the seed storage of nine genera of annual flowers. Relative humidity (RH) levels of 11%, 32%, 52%, and 75% provided wide ranges in seed moisture during storage at 5, 15, and 25C. At each temperature, total germination percentages (G) generally declined as seed moisture content increased during storage. The seed moisture range giving the highest G after 12 months of storage was determined for each temperature and plant genus. For all genera, seed moisture contents during storage increased as storage temperatures increased at constant RH levels. Moisture contents at 25C storage were 37%, 34%, 29%, and 20% higher than at 5C when RH levels were at 11%, 32%, 52%, and 75%, respectively.

Effect of preharvest applications of glyphosate on the drying, yield and quality of wheat

1994 ◽  
Vol 74 (2) ◽  
pp. 221-230 ◽  
Author(s):  
A. L. Darwent ◽  
K. J. Kirkland ◽  
L. Townley-Smith ◽  
K. N. Harker ◽  
A. J. Cessna ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Moisture Content ◽  
Standing Crop ◽  
Seed Quality ◽  
Seed Moisture Content ◽  
Baking Quality ◽  
Moisture Contents ◽  
Seed Moisture ◽  
Direct Cutting

In experiments conducted from 1988 to 1990 at four locations in the Parkland zone of western Canada, the drydown of seed and foliage, seed yield, seed quality and baking quality of wheat (Triticum aestivum L.) following preharvest applications of glyphosate were compared with those following windrowing prior to harvest or direct cutting of the standing crop. Glyphosate was applied in late July to early September at rates of 0.45, 0.9 and 1.7 kg acid equivalent ha−1 to wheat with seed moisture contents ranging from 80 to 11%. When compared with a standing crop, all glyphosate treatments applied at seed moisture contents above 25% slightly enhanced the drydown of wheat seed and foliage. Treatments applied at seed moisture contents below 25% had no effect on either seed or foliage drydown. Seed yields were generally greater from plots to which glyphosate was applied than from windrowed control plots, although in one of five experiments the reverse trend occurred. Increasing the rate from 0.45 to 1.7 kg ha−1 had no effect on yield. Windrowing or applying glyphosate to wheat with a seed moisture content of 61% or more reduced yields more than windrowing or applying glyphosate at seed moisture contents below this level. In experiments where the wheat in both control and sprayed plots was direct cut at maturity, average yields decreased as the rate of glyphosate increased from 0 to 1.7 kg ha−1. However, applications at seed moisture of 40% or less, caused little or no yield loss. There was little or no difference in 1000-seed weight, sample density, seed germination and protein content from plots sprayed with glyphosate at seed moisture contents below 40% than from control plots windrowed at the same moisture content or direct cut at maturity. Baking quality was not affected by any of the glyphosate treatments in experiments where the wheat was harvested by direct cutting. Key words: Glyphosate, wheat, desiccation, wheat quality, Triticum aestivum

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