作 者：
山金凤;刘子嘉;曾莹;陈军;吴向崇;祝遵凌
单 位：
南京林业大学风景园林学院;南京林业大学南方现代林业协同创新中心;南京林业大学艺术设计学院;三亚新大兴园林生态有限公司
摘 要：
以皇后帝王花种子为实验材料,对其进行形态解剖、种皮超微结构观测、种皮透水性与含水量检测,以了解皇后帝王花种皮结构与种子休眠的关系。结果表明:(1)皇后帝王花种子的种皮分为3层,外种皮的栅栏结构增强了种子的不透性,高度木质化的中种皮使种子坚硬,内种皮较薄却被一层不易透水的蜡质包裹;(2)酸蚀处理能使皇后帝王花种子种皮表面结构疏松,种皮变薄,种孔露出。但酸蚀4 h种子的中种皮及内种皮已经出现破坏性开裂,严重影响到胚活力;(3)完整干种子与酸蚀0.5 h种子在前14 h均能快速吸水,吸水50 h后近饱和状态,自此,二者吸水率小范围波动直至完全饱和;(4)酸蚀处理种子并不能使胚更好的吸水保水。因此,皇后帝王花种皮结构对胚的吸水并未形成阻碍,但不能排除其对胚呼吸的影响及对胚根的伸长和生长产生机械阻力的可能。
译 名：
The Seed Coat Structure of Protea magnifica and Its Effects on Seed Dormancy
作 者：
SHAN Jinfeng;LIU Zijia;ZENG Ying;CHEN Jun;WU Xiangchong;ZHU Zunling;Co-innovation Center for Sustainable Forestry in Southern China;College of Landscape Architecture, Nanjing Forestry University;Sanya Daxing New Landscape Ecological Co.Ltd;College of Arts & Design, Nanjing Forestry University;
单 位：
SHAN Jinfeng%LIU Zijia%ZENG Ying%CHEN Jun%WU Xiangchong%ZHU Zunling%Co-innovation Center for Sustainable Forestry in Southern China%College of Landscape Architecture, Nanjing Forestry University%Sanya Daxing New Landscape Ecological Co.Ltd%College of Arts & Design, Nanjing Forestry University
关键词：
Protea magnifica;;structure of seed coat;;water permeability;;seed dormancy
摘 要：
In order to discuss the seed dormancy characteristics of Protea magnifica, the seed morphology anatomical structure, seed coat ultrastructure and water permeability were observed. The results showed that:(1)The seed coat of P. magnifica consisted of three layers, the fence structure of the external seed coat enhancing the impermeability of the seeds, the highly lignified middle seed coat protecting the seeds, the thin inner seed coat covered with a layer of water-impervious wax.(2)The acid etching treatment could make the seed coat loose, the seed coat thin, and the seed hole exposed. However, the middle seed coat and inner seed coat etched had already undergone destructive cracking after the 4-hours treatment, which seriously affected the vitality of the embryos.(3)The dry seeds and seeds etched for 0.5 h could absorb water quickly in the first 14 h treatment, and nearly saturated after 50 h treatment. Since then, the two water absorption rates fluctuated in a small range until they were fully saturated.(4)The seed treated by acid etching did not allow the embryo to absorb water, therefore, the seed coat structure of P. magnifica did not hinder the water absorption of the embryo, but it couldn't be ruled out the the effect on embryo respiration and the possibility of mechanical resistance to radicle elongation and growth.
