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Dormancy Variations in Common Purslane Seeds

Published online by Cambridge University Press:  12 June 2017

G. H. Egley
G. H. Egley*
Affiliation:
S. Weed Sci. Lab., Agr. Res. Ser., U.S. Dep. Agr., Stoneville, MS 38776
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Abstract

Common purslane (Portulaca oleracea L.) seeds, produced by the same plants, had different degrees of dormancy. The dormancy variations were caused neither by low seed viability nor by location on the plant where seeds were produced. Seed water content and seed age at time of collection contributed to, but were not solely responsible for, the dormancy variations. Immature, brown seeds of high water content were less dormant than the more mature, black seeds of low water content. The immature seeds germinated better in the dark than did the more mature seeds. A puncture in the seed, over the radicle, broke purslane dormancy. Dormancy was not caused by blockage of water imbibition by seeds. Purslane dormancy developed during later stages of seed maturation on the mother plant.

Type
Research Article
Information
Weed Science , Volume 22 , Issue 6 , November 1974 , pp. 535 - 540
Copyright
Copyright © 1974 by the Weed Science Society of America 

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References

Literature Cited

1. Black, M. and Naylor, J.M. 1959. Prevention of the onset of seed dormancy by gibberellic acid. Nature 184:468–469.Google Scholar
2. Cross, Hope. 1931. Laboratory germination of weed seeds. Proc. Assoc. Offic. Seed Anal. N. Amer. 24:125–128.Google Scholar
3. Dunn, Stuart. 1970. Light quality effects on the life cycle of common purslane. Weed Sci. 18:611–613.Google Scholar
4. Evenari, Michael. 1965. Physiology of weed dormancy, after ripening and germination. Proc. Int. Seed Test. Assoc. 30:49–71.Google Scholar
5. Guttermann, Y. 1973. Differences in the progeny due to day-length and hormone treatment of the mother plant. Pages 59–80 in Heydecker, W., ed. Seed Ecology, The Pennsylvania State Univ. Press.Google Scholar
6. Hopen, H.J. 1972. Growth of common purslane as influencing control and importance as a weed. Weed Sci. 20:20–23.CrossRefGoogle Scholar
7. Koller, Dov. 1962. Preconditioning of germination in lettuce at time of fruit ripening. Amer. J. Bot. 49:841–844.Google Scholar
8. Mann, M.A. and Cavers, P.B. 1971. Seed production and dormancy in Rumex crispus. I. The effects of removal of cauline leaves at anthesis. Can. J. Bot. 49:1123–1130.Google Scholar
9. Morgan, S.F. and Berrie, A.M.M. 1970. Development of dormancy during seed maturation in Avena ludoviciana winter wild oat. Nature 228:1225.Google Scholar
10. Singh, K.P. 1968. Thermoresponse of Portulaca oleracea seeds. Curr. Sci. 37:506–507.Google Scholar
11. Singh, K.P. 1973. Effect of temperature and light on seed germination of two ecotypes of Portulaca oleracea L. New Phytol. 72:289–295.Google Scholar
12. U.S. Dep. of Agr., Economic Res. Serv. and Agr. Res. Serv. 1972. Extent and cost of weed control with herbicides and an evaluation of important weeds. 1968. ARS-H-1. 277 pp.Google Scholar
13. Vengris, Jonas, Dunn, Stuart, and Stacewicz-Sapuncakis, Maria. 1972. Life history studies as related to weed control in the northeast: 7 – common purslane. The University of Massachusetts Research Bulletin 598. 45 pp.Google Scholar
14. Vengris, Jonas and Stacewicz-Sapuncakis, Maria. 1971. Common purslane competition in table beets and snap beans. Weed Sci. 19:4–6.Google Scholar
15. Vidaver, W. and Hsiao, A. I-Hsiung 1972. Persistence of phytochrome-mediated germination control in lettuce seeds for 1 year following a single monochromatic light flash. Can. J. Bot. 50:687–689.CrossRefGoogle Scholar
16. Williams, J.T. and Harper, J.L. 1965. Seed polymorphism and germination: The influence of nitrates and low temperatures on the germination of Chenopodium album . Weed Res. 5:141–150.Google Scholar