光温和赤霉素对跳舞草种子萌发的影响  

Effect of Light Temperature and GA_3 on the Germination of Codariocalyx motorius Seeds

作　　者：李艳[1,2] 李思锋[1,2] 王庆[1,2] 邹凤英[1,2] 李莲梅[1,2] 

机构地区：[1]西安植物园 [2]陕西省植物研究所,西安710061

出　　处：《西北植物学报》2009年第12期2558-2563,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：陕西省科学院2009重大科技攻关项目;陕西省科学院青年人才培养专项(2006K-20)

摘　　要：以珍稀趣味药用植物跳舞草（Codariocalyx motorius）为材料,通过机械磨擦、不同温度、光照强度和GA3处理以及不同栽培介质研究了其种子萌发特性,以寻找其繁殖环节中的主要限制因素,为迁地保育和大规模育苗提供可行依据。结果表明：机械磨擦可使跳舞草种子的发芽势、发芽率及发芽指数显著提高,种子种皮的机械抑制是导致其发芽率低的直接原因;其种子萌发的适宜温度范围20-30℃,25℃为最适温度;浓度为50-100 mg/L的GA3处理的跳舞草种子萌发率高,且出苗整齐,根系粗壮,成苗率高;适度的遮光（30%）对跳舞草种子的萌发有促进作用,其发芽势、发芽率以及发芽指数最高;跳舞草的育苗基质可选用腐叶土：泥炭（1∶1）,出苗率达到85.9%,经济合理。Codariocalyx motorius is a rare interesting and medical species.To explore the underlying mechanisms relevant to the impediment in its sexual reproduction,and to provide the suit foundation for ex situ conservation and large-scale grow seedlings,we studied the effects and characteristics on germination of C.motorius seeds under the mechanical scarification,different temperature,light,GA3 and substrate.The results showed that mechanical friction made the C.motorius seeds a remarkably higher germinating energy,germination percentage and germinating index.Thus it followed that the mechanical inhibition resulting from the testa of C.motorius seeds was the direct reason why C.motorius seeds germinated at a low rate.Results showed that the optimum temperature was 25℃ and range was 20-30℃ for the germination of C.motorius seeds.In the 50-100 mg/L GA3,the germination percentage is higher,and the seedlings come out evenly,root system sturdy.In 30% sunshade percentage,germination speeds became quickly,and the germinating energy,germination percentage and germinating index is the highest.The substrate humus＋peat（1∶1） was favorable for the germination of C.motorius seeds with seedling emergence rate reaching 85.9%.The germination method is economical and reasonable.

关 键 词：跳舞草 种子萌芽 机械磨擦 温度 光照强度 GA3 基质 

分 类 号：Q945.34[生物学—植物学]