• Asian Journal of Turfgrass Science
• /
• v.1 no.1
• /
• pp.30-36
• /
• 1987

In order to promote the germination of Korean lawn grass(Zoysia japonica Steud.) seeds a gravimetric seed selection with a mixed chemical solution and the germination promotion with KOH treatment were studied and following results were obtained. 1. When immersed into methanol(S.G., 0.7) 14 percent of immature seeds were precipitated. 2. With water (S.G., 1.0) 36.5 percent of mature seeds were submerged. 3. On a mixture of carbon tetrachloride (S.G., 1.6) and ethylether (S.G., 0.7) in a ratio of 4:6 the seed selection was most effective. 4. When treated with KOH solution the germination rate was 71.01 percent in contrast to 6.0 percent of germination without the treatment. 5. As for concentration of KQH solution, 15 percent depressed the germination (46.7 %) whereas above 20 % the germination rate was gradually increased (79.32 %) up to 40 percent of concentration where the concentration started to depress germination ratio (77.32 %). 6. Finally, in connection with the duration of KOH treatment, a time lapse of up to 20 minutes depressed the germinating ratio(70.02 %) and 30 minutes to 45 minutes increased this ratio to 94.52 percent. 60 minutes of treatment depressed the germination to 75.62 percent.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.41 no.6
• /
• pp.656-664
• /
• 1996

Three malting barley cultivars, Sacheon #6, Doosan #12, and Doosan #22 were collected from Gwangsan, Chinju and Milyang which were artificially aged to provide varying levels of seed quality. Samples were evaluated by the standard germination test (SGT), cold germination test (CT), electroconductivity test and tetrazolium vigor test (TZ). In a multiple regression analysis, percent germination in the SGT accounted for 65% of the variation in field emergence of malting barley. Vigor index of the standard germination and cold germination tests also contributed significantly to the regression equation. Grain yield was predicted by the vigor index of TZ test. Percent standard germination and percent TZ germination prediction were useful for predicting grain yield in nine lots of malting barley.

• Journal of Environmental Science International
• /
• v.24 no.12
• /
• pp.1673-1679
• /
• 2015

This study was conducted to investigate the effects of fruit set internode on the germination of watermelon seeds. Generally fruits setted in higher than 20 internode were high percent of germination, fruit setted in low internode(5-10) is low. The higher fruit-set internode, fruit weight was significantly increased, but 1,000 seed weight was decreased the more fruit set internode. However number of seed was about 300 seeds irrespective of fruit-set internode. Investigating viability of seed by BP test, general percent germination was recorded highest at 5 flower cluster above 20 internode of fruit-set internode. In contrast, condition of fruit setted on 3, 4, 6 flower cluster were high percent of germination, regarded as unnormal germination not to be as normal seedling by 2~3%. Seed harvested at 5 flower-cluster had high viability on hypocotyl height and diameter of seedling through early growth test, but were not significant. Therefore 5 flower-cluster was optimum fruit-set internode to obtain high-quality seed.

• Journal of Forest and Environmental Science
• /
• v.35 no.4
• /
• pp.223-231
• /
• 2019

Castanopsis indica (Sil Batna) is an ecologically valuable multipurpose indigenous tree species of Bangladesh. Considering its high value but poor natural regeneration due to seed dormancy, the authors conducted an experiment at the Institute of Forestry and Environmental Sciences Chittagong University (IFESCU) during 2012-2013 to find out effective pre-sowing treatments. Ten pre-sowing seed treatments were applied on mature, even-sized seeds namely-control; sandpaper rubbing; nail clipping; immersion in normal water (at room temperature: 24℃) for 24 hrs., 48 hrs. and 72 hrs.; immersion in hot water (80℃) for 1 minute; soaking in 10% dilute H₂SO₄; soaking in 10% HCl for 5 minutes; and sowing in propagator house. Seeds sown after sandpaper rubbing at the distal end revealed best performances by providing highest germination percent (66.7%), germination energy (30%), germination index (0.17), germination rate (0.0145), germination value (30%) and plant percent (66.7%) within shortest period (38 days). The treatment also produced most vigor seedlings with 20.9 cm shoot height, 15 node number, and largest leaves (11.1 cm×2.9 cm). Hence, it is recommended to adopt sandpaper rubbing method for maximum germination and quality seedlings.

• Korean Journal of Medicinal Crop Science
• /
• v.1 no.1
• /
• pp.3-9
• /
• 1993

This experiment was conducted to study germination characteristics and the decrease cause of germination percent in Angelica gigas Nakai seed. The emergence percent of winter sowing was higher than that of spring sowing as 66.6% and 41.1%, respectively, and the first emergence date was also earlier in winter sowing. The seed germination speed, percent and coefficent showed the highest value at $20^{\circ}C$ of incubation temperature, but lower value at $10^{\circ}C\;and\;30^{\circ}C$. The water uptake speed was increased along with increasing water temperature. The weight of imbibed seed at germination was 3.4times higher based on the weight of intact dry seed and 2.3times on removal of seed coat. In terms of length of seed was large, the germination percent was higher. The germination percent of brown colored seeds showed higher value than that of green colored seeds. The prolonged storage period decreased germination percent. When A.gigas seeds stored at room temperatue for 2years, the seeds were lost their viability. The biological inhibition effect of methanol, water and ether extract on the germination and growth of A.gigas and lettuce seed showed the highest value in the methanol extract, followed by water extract and the least in ether extract.

• Journal of The Korean Society of Grassland and Forage Science
• /
• v.15 no.2
• /
• pp.80-86
• /
• 1995

High salinity common in reclaimed soil can reduce germination of crop seeds and aftermath its establishment and production. The experiment was done to measure germination and radicle elongation of berseem, subterranean, white clover and Italian ryegrass as Control under different temperature and NaCl concentrations. Onehundred seeds of berseem (Trifolium ulexandrinum cv. Bigbee). suberranean (T. suhterruneum, cv. Nungarin), white clover (T. repens, cv. Regal) and Italian ryegrass (Lolium mulriflorum, cv. Terafloum) were placed in petri dishes with a sheet of filter paper replaced every two days, and then exposed to 0, 12.5, 25. 50, 100 and 200mh4 of sodium chloride in darkened growth chambers controlled with 10, 15 and $20^{\circ}C$. Percent germination and radicle elongation were measured. Beneem clover showed greatest daily percent germination among the cloven. That of subterranean clover, moreover, was higher than that of white clover till 4 days after imbibition but the reverse result was true thereafter. Although germination of Italian ryegrass was delayed with decreased at 200mM of NaCl of $20^{\circ}C$. at 200mM of under$15^{\circ}C$ , and at higher than lOOmh4 of all level of temperature, respectively. Berseem clover had greatest radicle length under the same concentration of NaCl regardless of temperature treatment while radicle elongation of subterranean and white clover was repressed over 50-100mM of NaC1. The slope of linear regression equation between concentration of NaCl and percent germination declined under all temperature treatment in order of berseem, subterranean and white clover whereas the reverse result was showed in radicle length.

• Journal of agriculture & life science
• /
• v.46 no.4
• /
• pp.113-118
• /
• 2012

Effects of plant activators on germination of primed pepper seeds were investigated. The percent germination and T50 of primed seeds with 0.1mM ASM were 98% and 0.96 day at the 7 days after seeding, respectively. However, the germination of primed seeds with 0.5mM ASM were suppressed as 17% at the 7 days after seeding. The percent germination of primed seeds with 0.01mM INA were 90% at the 2 days after seeding. However, those of primed seeds by 0.1mM INA were increased as 90% at the 5 days after seeding. The percent germination of primed seeds was not change by treatment of the BABA and JA.

• FLOWER RESEARCH JOURNAL
• /
• v.16 no.3
• /
• pp.174-178
• /
• 2008

This study was carried out to investigate the effect $GA_3$, moist chilling storage and priming treatments on seed germination of Caltha palustris var. membranacea. Percent germination was greatly improved by $GA_3$ treatment. However, no significant differences were observed among concentrations and soaking periods of $GA_3$. Optimum $GA_3$ treatment was one hour presoaking in a 100mg${\cdot}L^{-1}$ solution. Germination enhancing effect of moist chilling stroage was significantly greater than that of $GA_3$. Chilling treatment for five weeks resulted in the greatest percent germination of 60.3%. Unlike the role of $GA_3$ and moist chilling storage, no appreciable effect on seed germination was observed by the priming the seeds with either a $Ca(NO_3)_2 $ or $KNO_3$ solution.

• Korean Journal of Plant Resources
• /
• v.22 no.2
• /
• pp.111-115
• /
• 2009

The seeds of Phellodendron amurense have difficulty to obtain because these plants show dioecism with independent distributions. This experiment was conducted to find the effects of soaking and prechilling treatment on the germination of P. amurense seeds. Seeds were soaked for 3, 5 and 10 days (soaking treatment), and placed on petri-dish at $4^{\circ}C$ for 10, 20, 30 and 50 days after soaked at room temperature for 24 hours (prechilling treatment). After the treatments, germination percentage, mean germination time, germination speed and germination performance index were analyzed. As a result of sowing, prechilled seeds for 30 days had the highest percent of germination, whereas all of the soaked seeds showed lower percent of germination than non-treatment (control). In case of mean germination time, only prechilling for 30 days was more effective than control. In germination speed, all of the soaked seeds had lower values than control whereas all prechilled seeds except prechilled seeds for 20 days showed higher values than control. Especially prechilled seeds for 30 days showed the highest rate among the prechilling treatments. Germination performance index was similar to germination speed.

• Korean Journal of Plant Resources
• /
• v.19 no.4
• /
• pp.480-487
• /
• 2006

This study was conducted to improve the germination percent and germination speed by seed priming using polyethylene glycol (PEG) 8,000 solution on Acer mono seed because it has low and irregular germination characteristics. Seed priming was carried out under 0, -0.25, -0.5, -1.0 and -2.0 MPa of water potential at $20^{\circ}C$ for 3 days. Primed seeds showed higher percent germination, germination speed, mean germination time (MGT) and germination performance index (GPI) than unprimed seeds. Especially, primed seed with -2.0 MPa of water potential had the highest germination properties. And primed seeds had a lower dormancy than the unprimed seeds. Relative growth rate and T/R ratio of seedling from primed seeds were measured to survey the effect of seed priming on the seedling vigor as well as seed germination. The seedlings from primed seeds at -2.0 MPa of water potential showed the highest relative growth rates of height and root collar diameter, however, the lowest value in T/R ratio. This study suggested that seeds priming at -2.0 MPa of water potential under $20^{\circ}C$ for 3 days enhanced not only the percent germination, germination speed, MGT and GPI but also the vigor and growth of seedlings in Acer mono.