【摘要】 利用红光(R)/远红光(FR)逆转的标准试验技术,对光周期敏感雌性不育苎麻(PFSR)进行长暗期(14 h/d)光间断处理。结果表明,R间断诱导雌性败育,延迟现蕾和开花;而FR可以逆转R的效应,使雌性可育;暗间断对雄性的育性没有明显影响。暗示光敏色素是PFSR雌性育性光敏性的光受体。更多还原

【Abstract】 Photoperiod-sensitive Female Sterile Ramie(PFSR) is sterile with long-day photoperiods(LD,≥13 h 30 min light/d) and fertile with short-day photoperiods (SD,≤13 h 20 min light/d).The treatments in the study were composed of LD,SD,and long dark phase(14 h dark/d) in SD photoperiods(10 h light/d) of PFSR with red light(R) / far red light(FR) alternate illuminations which is the standard reverse examination to check if phytochrome is the photoreceptor in a photo-induced reaction.The results showed that female sterile was induced and flower budding and flowering were deferred by R-breaking while these effects were reversed by FR-breaking and female became fertile.Female fertility was induced in the treatments with FR,R+FR and SD(10 h light/d),and female sterility was induced in the treatments with R,FR+R,R+FR+R and LD(>14 h light/d),but these were no effects on male fertility in all the treatments.It was indicated that phytochrome is the photoreceptor of female photoperiod-sensitive sterility in PFSR.更多还原