The Effect of Light, Temperature and GA Soaking Treatment on Seed Germination of Cool Season Turfgrasses

광, 온도 및 GA 침지처리가 한지형 잔디의 종자발아에 미치는 영향

  • Hyeon, Sang-Min (Shinsung Tourism Co.) ;
  • Kang, Hoon (Dept. of Horticulture, Cheju Nat'l Univ.) ;
  • So, In-Sup (Dept. of Horticulture, Cheju Nat'l Univ.) ;
  • Kim, Dong-Il (Dept. of Landscape Architecture, Graduate School, Sungkyunkwan Univ.)
  • 현상민 ((주)신성관광) ;
  • 강훈 (제주대학교 농과대학 원예학과) ;
  • 소인섭 (제주대학교 농과대학 원예학과) ;
  • 김동일 (성균관대학교 대학원 조경학과)
  • Published : 1995.09.01

Abstract

This study is aimed to understand the effects of temperature, light and GA soaking treatment on the seed germination of perennial ryegrass 'Dandy', creeping hentgrass 'Penlinks', tall fescue 'Arid' and Kentucky hluegrass 'Nasaw'. These experiments are carried in vitro, and their results obtained are summarized as the followings ; The optimum temperature for seed germination of perennial ryegrass 'Dandy' was found to he ranged at 20~30$^{\circ}C$, and the optimum temperature for germination of creeping bentgrass 'Penlinks', tall fescue 'Arid' and kentucky bluegrass 'Nasaw' seeds was found to be ranged at 20~25$^{\circ}C$, whereas the germination percentage under the below or above temperature of this range decreased. The germination of perennial ryegrass 'Dandy' and tall fescue 'Arid' seeds showed no effect on light, and while the germination percentage of creeping hentgrass 'Penlinks' increased more highly under the dark condition than under the light condition. The germination percentage decreased according to the higher temperature. The germination of Kentucky bluegrass 'Nasaw' seeds increased more highly under the dark condition than under the light condition at 20~25$^{\circ}C$, whereas the germination percentage under the dark condition at 15$^{\circ}C$ and 30$^{\circ}C$ decreased. In case of GA soaking treatment of seeds, all the cool season turfgrasses tested showed their own promoting effects on seed germination. The early germination of tall fescue 'Arid' was good without the soaking times. Creeping bentgrass 'Penlinks' and perennial ryegrass 'Dandy' had re-spectively the highest germination percentage at 10min and 1hr soaking treatment, and the longer the soaking time, the lesser the germination percentage. Kentucky bluegrass 'Nasaw' obtained the best results at 24has soaking treatment, and the longer the soaking time, the better the ger-mination percentage.