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Spatially Interpolated Rainfall Characteristics at Different Areal Extents in the Woopo Watershed
Edwin P. Ramos(에드윈 P. 라모스),Hwang-Won Kang(강항원),Eul-Soo Yun(윤을수),Jae-Saeng Lee(이재생),Jee-Yeon Ko(고지연),Ki-Do Park(박기도),Ki-Youl Jung(정기열),Young-Dae Choi(최영대),Sung-Tae Park(박성태) 한국토양비료학회 2008 한국토양비료학회 학술발표회 초록집 Vol.2008 No.5
Germination Characteristics of Photoblastic Weedy Rice (Oryza sativa L.) Seed
Sang Yeol Kim(김상열),Sun Joo Hwang(황선주),In Jung Lee(이인중),Dong Hyun Shin(신동현),Sung Tae Park(박성태),Un Sang Yeo(여운상),Hang Won Kang(강항원) 韓國雜草學會 2009 Weed&Turfgrass Science Vol.29 No.4
광발아성을 가진 것으로 추정되는 검은색 종피 잡초성 벼의 발아 특성을 구명하며 잡초성벼 방제의 기초자료로 제공하고자 백색광, R 및 FR광에 따른 발아특성, 종피의 영향 및 암흡습으로 인한 2차 휴면특성을 조사하였다. 광발아성 추정 잡초성 벼의 발아율은 광조건에서 100%이었으나 암조건에서는 6%로 낮았고 R광 처리시 발아율이 증가하였으며 R광 처리후 FR광 처리시 발아율이 감소하였다. 또 R광과 FR광 혼합처리시 혼합횟수에 관계없이 마지막 광이 R이면 발아가 촉진되었고 FR이면 발아가 억제되어 검은색 종피 잡초성벼는 광발아성 종자임이 확인되었다. 또 종피를 제거했을 경우 광발아성 특성을 나타내지 않았고, 종자를 암상태에서 수분을 흡수시킬 경우 2차 휴면으로 인해 발아율이 낮아졌는데 2차 휴면 정도는 암흡습 기간이 길수록 증가되어 5일 이후에는 발아율이 1% 이하로 낮았다. The effects of different light qualities on the germination characteristics of a newly-discovered black-hulled weedy rice line that shows photoblastism was evaluated. In addition, the effects of rice hull and dark imbibition duration on germination was also studied. The germination percentage under white light was greater than 98% and less than 6% in darkness, indicating that the black-hulled weedy rice sees as positively photoblastic. While red light (R) stimulated germination, the germination was lower than in the white light treatment and the germination percentage of the seeds exposed to far-red light (FR) was similar to those maintained in darkness. The exposure to R for 30 sec. increased germination and this effect was saturated at an exposure of 15 min. The R effect was reversed by subsequent exposure to FR. Phytochrome control of the photoblastic weedy rice seed germination was confirmed by R/FR reversibility. The removal of the hull restored seed germination completely even in dark condition. Non-dormant weedy rice seeds imbibed in the dark enter a deep secondary dormancy, the depth of which was positively related to the duration of imbibition period. These results show that the black-hulled weedy rice seeds exhibit phytochrome-meditated photoblasticity, hull-imposed dormancy and secondary dormancy.