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Ecology of seed dormancy and germination of Carex divisa Huds.: Effects of stratification, temperature and salinity | ||
| International Journal of Plant Production | ||
| مقاله 3، دوره 3، شماره 2، تیر 2009، صفحه 27-40 اصل مقاله (194.95 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22069/ijpp.2012.639 | ||
| نویسندگان | ||
| M. Mohammad Esmaeili* 1؛ A. Sattarian2؛ A. Bonis3؛ J.B. Bouzillé3 | ||
| 1Gonbad Kavoos Institute of Higher Education, Iran; Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France | ||
| 2Gonbad Kavoos Institute of Higher Education, Iran | ||
| 3Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France | ||
| چکیده | ||
| Carex divisa is a patrimonial rhizomatous species and acts as an important component of grazed wet permanent grassland on the French Atlantic coast. This study treated three storage regimes (wet-cold, dry-cold and dry-warm), burial in soil, fluctuating temperature and salinity on seed germination of C. divisa. The seeds were dormant at maturity. No seed germinated after 2 and 6 weeks of dry storage under laboratory conditions prior to the onset of the stratification treatment. Thus, the effect of after-ripening was not evident in C. divisa. Germination rate of 11.3% started only in the wet-cold stratification treatment after 2 months. Seeds that had been stored under wet-cold conditions for 8 months had a higher germination than seeds stored under dry-cold and dry-warm treatments for the same length of time. Seeds of C. divisa tested at 10-20 °C in light had no marked dormancy cycle, but in darkness under a fluctuating temperature regime (10-20 °C), C. divisa seems to exhibit annual dormancy cycles. There were no differences in germination between fluctuating temperatures 10-20 °C and 15-25 °C after 12 months in the wet-cold treatment. No germination occurred at fluctuating temperatures 0-10 °C. The highest percent germination was observed in distilled water, followed by 50 mM L-1 NaCl. The highest NaCl concentration (250 mM L-1) was found to inhibit seeds germination. | ||
| کلیدواژهها | ||
| After-ripening؛ Burial experiment؛ Poitevin Marshland؛ Sedges؛ Wet-cold | ||
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