Studying the Effect of Drought and Freezing on Tuberous Root Germination of Lesser Cleandine ( Ranunculus ficaria)

Document Type : Research Article


agricultural research education and extension organization


R. ficaria is an invasive perennial and tuberous roots weed. The most important means of its reproduction and dispersion are tubers. In order to study the effect of droughty and freezing on germination of lesser celandine tubers, two experiments were conducted at weed science laboratory of Faculty of Agriculture Ferdowsi University of Mashhad in 2008. The experiment was a completely randomized design with factorial arrangement of treatments and four replications. In freezing experiment, factors included of time of exposure to freezing(12,24,48 and 96 hours) and freezing temperature (0,-5,-10 and -15 ˚C). To examine the effect of desiccation on ficaria tubers, factors included of , five levels of temperature(5,10,15,20, and 25 ˚C), four levels of osmotic potential(0,-5,-10 and -15 bar) and two tuber sizes [big(>0.2g) and small(