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

پژوهش های حفاظت گیاهان ایران

Article 5, Volume 24, Issue 4 - Serial Number 10, December 2010   

Document Type: Research Article

DOI: 10.22067/jpp.v24i4.8128

Authors

Sima Sohrabi^* ; Mohammad hasan rashed; Mahdi nasiri mahalati; seyed karim Mousavi

agricultural research education and extension organization

Abstract

Abstract
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(