Study on the Biological Characteristics of Rosa cymosa Seeds
Small-fruited Rose cymosa seeds were used as materials for the study of the size,seed kernel percentage,thou-sand-seed weight,germination impediment factors,viability,storage characteristics,and germination characteristics.The re-sults revealed that few R.cymosa seeds had a low seed kernel rate of(33.16±10.05)%and a thousand-seed weight of(6.198 3±0.236 7)g;the seed shells were thick and hard,and although they had a certain degree of water permeability,there was a cer-tain degree of mechanical obstacle to seed germination.The seeds were visible in the distribution of the endosperm and em-bryo,but the seed embryo did not differentiate obviously,and it had the characteristics of physiological dormancy;the en-dogenous inhibitors may be one of the main reasons for the dormancy of R.cymosa seeds,the seeds of each isolated phase of the extract on the germination of Brassica napus seed inhibition from large to small in the order of water phase>ethanol phase=ethyl acetate phase>petroleum ether phase,in which the water phase of the endogenous inhibitors on the root length of the seedling and the embryonic axis of the length of a significant inhibitory effect,ethanol phase of the endogenous inhibitors on the root length of the seedling inhibitory effect is higher than the embryonic axis of the length of the seedling.R.cymosa seeds have a certain degree of resistance to storage at 4℃for six days.The seeds of Rosa minor have a certain degree of storage resistance at 4℃under the condition of storage for six months,and its vitality can still maintain about 90%;water as a solvent,liquid material ratio≥5∶1,the number of times of wet and dry alternating treatment≥5 can break its dormancy,significantly im-prove its germination rate,into the kernel of the seed germination rate of up to 40%or more.
Rosa cymosaseedsbiological characteristicsendogenous inhibitorgermination obstacle factors
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