摘要
经测定,云南金钱槭迁地保护地的种子千粒重为2346.5g,与就地保护地文山老君山马鹿塘的种子千粒重3255.6g相比,其种子千粒重要轻些。四唑(TTC,0.3%)染色测种子生活力的结果表明:①在25℃水环境下60d种子就没有生活力;②野外贮藏种子180d有52%种子有生活力;③种子贮藏510d:花盆中有58%种子有生活力;室内有24%种子有生活力;4℃有96%种子有生活力;15℃有36%种子有生活力;25℃种子没有生活力。在6℃条件下去外种皮,种子5个月发芽率达98%,而恒温15℃、25℃、30℃和变温条件下都没有一粒种子萌发。低温(6℃)是云南金钱槭种子的最适萌发温度。种子萌发不需光。野外播种经过一冬有17.2%种子发芽,花盆播种经过两冬一夏有58%种子发芽。种子所具有的特性是其在自然条件状态下濒危的重要原因之一。
The weight of a thousand seeds of Dipteronia dyeriana Henry from ex situ plants 2346.5 g is lighter than that of seeds from the wild plants 3255.6 g. TTC colouring seed vitality tests indicated that： 1. in 25℃ water environment, 60 d seeds had no vitality; 2. seeds 52% stored up in the wild for 180 d had vitality; 3. seeds 58% stored up 510 d in pot had vitality; 24% seeds in room alse had vitality; in 4℃ 96% seeds had vitality; in 15℃ 36% seeds had vitality; in 25℃ seeds had no vitality. In 6℃, the germination rate of seed without testa was 98% in 5 months, while in constant temperature of 15℃, 25℃, 30℃ and in condition of changing temperature had no seed germination. Low temperature （6%） was the most suitable temperature for the germination of D. dyeriana. No light needed for seed germination. Sowing in the wild, there were 17.2% seeds germinated after a winter and 58% seeds germinated after two winters and one summer in pot. Its own seed character of D. dyeriana was one of the main factors causing the extinction of the species.
出处
《云南植物研究》
CSCD
北大核心
2006年第5期509-514,共6页
Acta Botanica Yunnanica
基金
云南省自然科学基金(2002C0081M)
关键词
稀有植物
云南金钱槭
种子
发芽率
生活力
Rare plants
Dipteroniadyeriana
Seed
Germination rate
Vitality
