Seed dormancy and germination inVitis amurensisand its variation

2011 ◽  
Vol 21 (4) ◽  
pp. 255-265 ◽  
Author(s):  
W.Q. Wang ◽  
S.Q. Song ◽  
S.H. Li ◽  
Y.Y. Gan ◽  
J.H. Wu ◽  
...  
Keyword(s):  
Seed Dormancy ◽  
Vitis Amurensis ◽  
Dormancy Release ◽  
Temperature Dependent ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Germination Characteristics ◽  
Species Similarity ◽  
Germination Behaviour ◽  
Seed Dormancy And Germination

AbstractThere is little information about seed dormancy release and germination behaviour inVitis amurensis, which is one of the most important wildVitisspecies. This work aimed to investigate the dormancy release and germination characteristics and their variation inV. amurensisseed. Seed dormancy was released by: (1) stratification at 5, 10, 15, 20, 25 and 15/5°C, respectively; (2) stratification at 25°C followed by stratification at 5°C; (3) 5°C stratification before or after seed drying; and (4) stratification at a series of relative humidities (RHs) at 5 and 25°C. The freshly harvested and dormancy-released seeds were germinated at three fluctuating and four constant temperatures. InV. amurensis: (1) dormancy release could occur at temperature ≤ 25°C, but was maximal at 5°C for all varieties; (2) dormancy release and induction occurred simultaneously during stratification; (3) the rates of dormancy release and induction were dependent on temperature; (4) seed moisture content affected dormancy release with a temperature-dependent pattern; (5) seeds germinated better at fluctuating temperature than at constant temperature. However, the optimum condition for stratification and germination, the rates of dormancy release and induction, and the response of seeds to warm stratification, to drying and to germination temperature varied significantly among theV. amurensisvarieties. Our data imply that seed dormancy and germination inV. amurensisnot only have intra-species similarity, but also vary within species, which may be due to differences in environmental conditions at the original growth and cultivated sites.

scholarly journals Perubahan Perilaku Dormansi selama Proses Desikasi pada Benih Kacang Bambara (Vigna subterranea L. Verdc.)

2020 ◽  
Vol 48 (1) ◽  
pp. 37-43
Author(s):  
Maryati Sari ◽  
Satriyas Ilyas ◽  
M. Rahmad Suhartanto ◽  
Abdul Qadir
Keyword(s):  
Seed Dormancy ◽  
Bambara Groundnut ◽  
Vigna Subterranea ◽  
Drying Method ◽  
Dormancy Breaking ◽  
Hard Seed ◽  
Seed Desiccation ◽  
Germination Behaviour ◽  
Field Emergence ◽  
Seed Dormancy And Germination

Bambara groundnut seeds often show unsynchronized and slow germination even though on newly harvested seeds. This might be due to the presence of seed dormancy. Therefore, the objective of this research was to obtain the information on seed dormancy and germination behaviour of bambara groundnut seeds during desiccation. The experiment was arranged in a nested design. Dormancy breaking treatments (untreated, mechanical scarification, soaking in 1% KNO3 for 2 hours, mechanical scarification followed by KNO3 soaking) were nested in each of the desiccation levels (fresh seeds with 54.7% moisture content (mc), desiccated seeds with 44.4%, 18.0%, 15.4%, and 12.1% mc). The results showed that newly harvested seeds were in dormant state. Seed desiccation did not increase the intensity of seed dormancy, even resulted in an increase in field emergence (at 30 days after planting) from 43.9% in fresh seeds to around 70% in dry seed (12-15% mc). Seed desiccation (from 44.4% mc to 12.1% mc) increased the field emergence, although it was inadequate to break the dormancy completely. Meanwhile, seed desiccation tended to increase the GA/ABA ratio, but the seed permeability was decreased. The fact showed that seed desiccation reduced the intensity of dormancy of bambara groundnut seed, therefore, it is suggested to modify the drying method in order to accelerate the increasing of GA/ABA ratio while keeping the testa permeable. Keywords: after-ripening, GA/ABA ratio, hard seed, kacang bogor, permeability

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.

Seed Dormancy in Red Rice (Oryza sativa) I. Effect of Temperature on Dry-Afterripening

Weed Science ◽  
1981 ◽  
Vol 29 (4) ◽  
pp. 402-404 ◽  
Author(s):  
Marc A. Cohn ◽  
J. A. Hughes
Keyword(s):  
Oryza Sativa ◽  
Seed Dormancy ◽  
Exposure Time ◽  
Storage Temperature ◽  
Effect Of Temperature ◽  
Red Rice ◽  
Seed Moisture Content ◽  
Dry Storage ◽  
C Storage ◽  
Seed Moisture

The effect of postharvest storage temperature (–15, 5, 20, and 30 C) on seed dormancy of red rice [Oryza sativa L. ‘strawhulled (SH)’], an annual species, was studied. Intact and dehulled (by hand) seeds were dormant at harvest. Intact seeds were nondormant (greater than 90% germination at 30 C) after dry storage at 20 or 30 C for 4 weeks after harvest. In intact seeds stored dry at 5 C, the degree of dormancy was dependent upon postharvest exposure time at 20 C prior to storage. Dormancy of intact seeds decreased at 5 C as this initial postharvest exposure to 20 C was increased from 2 to 7 days. This effect of initial 20 C exposure was independent of seed moisture content (11 to 12%). After dry storage of intact seeds at 5 C, dehulling promoted germination. Germination of such dehulled seeds increased with increasing storage time at 5 C up to 11 months when complete germination occurred. The response of seeds dehulled immediately after dry storage at 5 C was independent of prior exposure time (2 to 7 days) at 20 C. Storage at −15 C prevented all forms of dry-afterripening for 1 yr.

Seed dormancy and germination characteristics ofGaura parviflora, an exotic weed species in China

2014 ◽  
Vol 34 (24) ◽  
Author(s):  
刘龙昌 LIU Longchang ◽  
徐蕾 XU Lei ◽  
冯佩 FENG Pei ◽  
董雷鸣 DONG Leiming ◽  
张媛媛 ZHANG Yuanyuan
Keyword(s):  
Seed Dormancy ◽  
Weed Species ◽  
Germination Characteristics ◽  
Seed Dormancy And Germination

Seed dormancy and germination in Rhexia mariana var. interior (Melastomataceae) and eco-evolutionary implications

1999 ◽  
Vol 77 (4) ◽  
pp. 488-493 ◽  
Author(s):  
Carol C Baskin ◽  
Jerry M Baskin ◽  
Edward W Chester
Keyword(s):  
Seed Dormancy ◽  
Climatic Conditions ◽  
Eastern North America ◽  
Temperate Region ◽  
High Germination ◽  
Germination Characteristics ◽  
Physiological Dormancy ◽  
Plant Families ◽  
Dormancy Cycles ◽  
Seed Dormancy And Germination

Ninety-seven percent of the Rhexia mariana L. seeds collected in Tennessee were physiologically dormant at maturity in autumn, and they became nondormant during stratification. Light was required for germination, and seeds germinated to higher percentages on filter paper than on sand. Seeds buried in soil in October 1992 and 1994 and exposed to natural seasonal temperatures were exhumed and tested for germination at monthly or bimonthly intervals for 30 and 32 months, respectively. Seeds gained the ability to germinate to 80% or more at 30:15 and 35:20°C during the first winter of burial and also at 25:15°C during the second winter, but they did not re-enter dormancy. In contrast, seeds incubated at 20:10°C exhibited an annual cycle of moderate to high germination percentages in winter-spring and low germination percentages in summer-autumn. Thus, germination can occur at habitat temperatures in Tennessee from April to September. This is the first report of physiological dormancy in seeds of the Melastomataceae in the temperate region. Like members of many plant families in temperate eastern North America, seeds of R. mariana (i) show a decrease in the minimum temperature for germination as they come out of dormancy and (ii) exhibit some seasonal variation in the temperature range for germination. Thus, these dormancy or germination characteristics appear to be adaptations of species to the climatic conditions in temperate eastern North America.Key words: seed dormancy, seed germination, dormancy cycles, buried seeds, Melastomataceae, Rhexia.

Sign in / Sign up

Export Citation Format

Share Document