Abstract: 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 also 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 .

Key words: Rare plants

摘要： 经测定, 云南金钱槭迁地保护地的种子千粒重为2346. 5 g , 与就地保护地文山老君山马鹿塘的种子千粒重3255. 6 g 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60 d 种子就没有生活力; ② 野外贮藏种子180 d 有52% 种子有生活力; ③ 种子贮藏510 d: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。

关键词: 稀有植物, 云南金钱槭, 种子, 发芽率, 生活力FONT