4种中国野生无髯鸢尾种子休眠原因的研究  

Dormancy Causes of the Seeds of Four Species of Wild Apogons iris in China

作　　者：路覃坦[1,2] 张金政[1] 孙国峰[1] 李晓东[1] 姜闯道[1] 于学斌 

机构地区：[1]中国科学院植物研究所植物园,北京100093 [2]中国科学院研究生院,北京100039 [3]北京天卉苑花卉研究所,北京100093

出　　处：《园艺学报》2008年第10期1497-1504,共8页Acta Horticulturae Sinica

基　　金：中国科学院农业办公室项目(KSCX2-YW-N-44-03);中国科学院重要方向性项目(KSCX2-YW-N-52);科技部农业科技成果转化项目(2006491010002)

摘　　要：玉蝉花、山鸢尾、金脉鸢尾和西南鸢尾4种中国野生无髯鸢尾种子均存在休眠。对种子进行了离体胚培养、切割胚乳、剥离种皮等处理和用Instron 5848微力材料试验机测量刺穿珠孔端结构所需力的试验,研究表明:种皮对种子萌发具有一定的影响,珠孔端胚乳对胚生长的机械束缚是萌发的主要限制因素;4种无髯鸢尾种子的胚乳中含有抑制萌发的物质,对种子的成苗率有显著影响。The seeds of Iris ensata, Iris setosa, Iris chrysographes and Iris bulleyana, which are four species of Apogon iris, are all dormant. The failure in germination of the seeds were studied by embryos in vitro culture, endosperm scarification treatments, seed coat removal and measuring the force need to pierce the structure in the micropylar end with Instron 5848 MicroTester. The results indicated that embryo was not responsible for dormancy and seed coat had something to do with it, while the mechanical resistance acted on embryo which came from endosperm at the micropylar end was the most important limiting factor to germination. We presumed that the endosperm of the four species of iris seeds may contain the germination inhibitors, which affected the stocking percentage significantly.

关 键 词：鸢尾 无髯鸢尾 种子 休眠 萌发 

分 类 号：S682.19[农业科学—观赏园艺]