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Differences in the dormancy of wild oat avena fatua kernels in different years






Sbornik UVTI (Ustav Vedeckotechnickych Informaci) Ochrana Rostlin 16(2): 147-152

Differences in the dormancy of wild oat avena fatua kernels in different years

The length of dormancy of wild oak kernels in Czechoslovakia varies each year depending on climatic conditions in June and July. Over 5 yr, the shortest dormancy of wild oak kernels was recorded in 1977; in June and July of that year the sum of rainfall was 197.7 mm and the average temperature was 18.1.degree. C, which was nearly 2.degree. C less than in the same period in 1976 when the longest kernel dormancy was recorded. At shorter dormancy some seeds can emerge in the summer, as observed in the colder and humid period of 1975 and 1977. For a higher wild oat seed emergence rate in autumn, particular importance is attached to a longer duration of the period with average air temperatures above 5.degree. C, to sufficient rainfall, and to a hydrothermic coefficient higher than 1.0. In that period, emergence is possible in wild oat seeds which have overcome primary dormancy as well as in the seeds stored in the soils for a longer time.


Accession: 005151217



Related references

Adkins, S.W.; Ross, J.D., 1981: Studies in wild oat seed dormancy. 1. The role of ethylene in dormancy breakage and germination of wild oat seeds (Avena fatua L.). Seeds of Avena fatua stored at 25 deg C showed a characteristic loss of dormancy whereas seeds stored at 5 deg C remained dormant. Ethephon was shown to increase germination of partly dormant seed imbibed under certain temp. regimes; a similar eff...

Adkins, S.W.; Ross, J.D., 1981: Studies in Wild Oat Seed Dormancy: I. THE ROLE OF ETHYLENE IN DORMANCY BREAKAGE AND GERMINATION OF WILD OAT SEEDS (AVENA FATUA L.). Seed of Avena fatua were shown to exhibit a characteristic loss of dormancy during dry storage at 25 C, whereas similar seed stored at 5 C maintained dormancy. 2-Chloroethylphosphonic acid was shown to increase germination of partly dormant seed i...

Adkins, S.W.; Ross, J.D., 1981: Studies in wild oat seed dormancy 1. the role of ethylene in dormancy breakage and germination of wild oat seeds avena fatua. Seed of A. fatua exhibited a characteristic loss of dormancy during dry storage at 25.degree. C; similar seed stored at 5.degree. C maintained dormancy. 2-Chloroethylphosphonic acid increased germination of partly dormant seed imbibed under certai...

Kohout, V.Z.manek, J.S.erba, R., 1980: Differences in the dormancy of wild oat kernels in different years. Sbornik UVTIZ ochrana rostlin 16(2): 147-152

Hsiao A.I., 1987: Mechanisms of dormancy in wild oats avena fatua. Mares, D J (Ed ) Fourth International Symposium on Pre-Harvest Sprouting in Cereals; Port Macquarie, New South Wales, Australia, February 1986 Xv+618p Westview Press: Boulder, Colorado, Usa Illus Paper 425-440

Toole, E.; Coffman, F., 1940: Variations in the dormancy of seeds of the wild oat, Avena fatua. Individual plant samples of wild oats (Avena fatua) were collected in 10 localities in the western half of the United States and were tested for germination immeditely and again 9 to 11 months later. A marked difference was found in the proportion...

Zemanova, A., 1975: Contribution to the study of dormancy of wild oat (Avena fatua L.). In a Petri-dish trial, dormancy in freshly-harvested A. fatua seeds was broken by treatment with 100 mg GA/l and 0.1 mg Ethrel [ethephon]/l. Spraying plants in the field at flowering with 500 mg GA/l produced seeds which at harvesting showed no do...

Hay, J.R.; Cumming, B.G., 1959: A method for inducing dormancy in wild cats (Avena fatua L.). Soaking seeds of A. fatua in water induced almost complete secondary dormancy. Soaking in boiled water cooled to room temperature, produced a greater effect. The seeds responded to potassium nitrate, hydrogen peroxide, gibberellic acid, light, hul...

Hay, J.R., 1962: Experiments on the mechanism of induced dormancy in wild oats, Avena fatua L. Experiments were conducted on the factors involved in the induction of dormancy in wild oats. It was shown that when the supply of air reaching the embryo of imbibed seeds is restricted, changes occur in the caryopses so that when the seeds are su...

Foley M.E., 1987: The effect of wounding on primary dormancy in wild oat avena fatua caryopses. Mechanical wounding broke dormancy and promoted germination of primary dormant pure-line wild oat (Avena fatua L. # AVEFA) caryopses that were in the first physiological stage of dormancy. Caryopses incubated in petri dishes responded to wounding...