Dormancy and germination of Coscinium fenestratum (Gaertn.) Colebr. seeds

作者：Anilkumar C^*; Chitra C R; Bindu S; Prajith V; Mathew P J

来源：Seed Science and Technology, 2010, 38(3): 585-594.

Fresh seeds of Coscinium fenestratum with moisture content 23% registered only 37% germination. Nevertheless, germination was enhanced to 93% as the initial seed moisture content was reduced to 10% upon exposure to open laboratory conditions. When fresh seeds were pre-treated with 2 to 10% KNO(3) or GA(3) 3000 ppm, 67 to 95% germinated respectively. Seeds kept exposed for two months at laboratory conditions lost their viability, while the seeds stored for four to six months inside the polycarbonate bottles expressed 90% germination within a month of sowing. Thus the effect of either 10% reduction in moisture content or hermetic storage for more than three months after ripening is same for alleviating dormancy. Incidentally the embryo is fully mature at the time of dispersal, and the dormancy may be controlled by some other physiological factors like GA(3) ratio. Considering these seed traits, the cause and ways of dormancy are discussed.

• 出版日期2010