文献类型：期刊文献

中文题名：血皮槭种子休眠机制研究

英文题名：Mechanisms of Seed Dormancy of Acer griseum

作者：张川红[1] 郑勇奇[1] 吴见[2] 陈朋[1] 李伯菁[1]

第一作者：张川红

机构：[1]中国林业科学研究院林业研究所,林木遗传育种国家重点实验室,北京100091;[2]北京林业大学资源林学院,北京100087

年份：2012

卷号：32

期号：5

起止页码：573-577

中文期刊名：植物研究

外文期刊名：Bulletin of Botanical Research

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：林业公益性行业科研专项(201204307);中央级公益性科研院所基本科研业务专项资金项目(RIF2010-01)

语种：中文

中文关键词：血皮槭;种子休眠;抑制物质;吸水特性

外文关键词：Acer griseum ; seed dormancy ; inhibitory substances ; water absorption

分类号：S567.239

摘要：利用抑制物生物测定法和酸蚀技术研究了血皮槭种子休眠的原因。血皮槭种子吸水是一个非常缓慢的过程,在140 h以后种子含水量才能达到68%左右。酸蚀处理种子3 h,虽然没有加快种子的吸水速率,但能较好得使果皮变薄,也不影响种子的生活力。种子的各部位(果皮、种皮、子叶、胚根)均含有抑制物质,对小白菜种子的发芽率及胚根生长有很强的抑制作用,子叶各种处理水浸提液的抑制作用最强,果皮和种皮次之。血皮槭种子休眠主要由种壳机械障碍和种胚生理休眠两重因素导致,因此如何克服致密果壳而使激素能接触生理休眠的种胚是打破其种子休眠的关键技术。
The internal and external causes of seed dormancy of Acer griseum were studied by inhibitor bioassay method and sulfuric acid treatment. Results showed that the water-absorption of A. griseum seeds was a slow process due to its thick woody pericarp. Water content of seeds of A. griseum reached only 68% after 140 h of water-absorption treatment. The sulfuric acid treatment for 3h did not speed up the water-absorption, but made the percarp thinner without damaging seed viability. Inhibitory substances were detected in every part of the seed, including periearp, seed coat, cotyledon and radicle. The cotyledon extracts had the stronger inhibitory effect on seed germination percentage and radicle growth than those from the pericarp and seed coat. The main reason for seed dormancy of A, griseum was physiological dormancy of seed embryo and physical obstacle of the pericarp. How to make the hormone reaching the seed embryo through the compact pericarp was the critical to break its dormancy quickly.