<<登录旧系统审稿   登录新系统审稿>>

建议您登录自己的邮箱点击审稿链接进入审稿系统 ×
首页 学报新闻 学报概况 编委会 专家库 学术影响 投稿指南 审核流程 标准规范 下载专区 投诉邮箱 联系我们 EngLish

正文 您当前的位置:首页》正文

4种柱花草种子萌发形态的观察与分析
作者: 张 瑜  严琳玲  虞道耿  杨虎彪  白昌军  
单位: (中国热带农业科学院 热带作物品种资源研究所/农业部热带作物种质资源利用重点开放实验室  海南 儋州 571737)  
关键词: 柱花草  种子萌发  形态变化  
分类号:S541
出版年,卷(期):页码:2015 ,46 ( 2 ): 页码:216-222
摘要:

【目的】观察4种柱花草种子形态特征并分析其萌发过程中的形态变化,为深入研究柱花草的种子特性、发育机理以及胚萌发提供依据。【方法】对4种柱花草(热研2号柱花草、维拉诺有钩柱花草、西卡柱花草和马弓形柱花草)种子进行萌发试验,观察萌发过程中胚的变化,并测定胚根和胚芽长。【结果】4种柱花草种子的荚果外形、种皮颜色各不相同,其种子萌发的过程基本相同,大体可分为5个形态。不同品种间在子叶颜色、胚芽长出时间和幼芽长度上存在差异,热研2号柱花草、有钩柱花草、西卡柱花草和马弓形柱花草分别在幼芽生长到5.7、4.0、4.0和3.2 cm时子叶展开;有钩柱花草萌发第5 d时胚芽伸出,其他3种柱花草均在萌发第4 d时胚芽伸出;除西卡柱花草未发出侧根外,其他3种柱花草均有侧根发出;西卡柱花草和热研2号柱花草的幼芽长度较长,其次为有钩柱花草,马弓形柱花草幼芽长度最短。【结论】种子荚果、种皮颜色、萌发时的子叶颜色、胚芽长出时间及幼芽长度的差异可作为柱花草种子特性、发育机理及胚萌发研究的依据。

【Objective】Seed morphological characteristics and the changes in seed germination process of four kinds of stylo were observed and analyzed to provide references for further study on seed characteristics, developmental mechanism, embryo germination and stylo cross breeding. 【Method】Four kinds of stylo, including S. guianensis SW. cv. Reyan No.2, S. hamata(L.)Taub.cv. Verano, S. scabra Vog cv. Seca and S. hippocampoides Fine stem stylo were used to investigate embryo changes, germ and radicle length in the germination. 【Result】The results showed that pod shape and coat color of  seeds of four stylo varieties were different, but the processes of seed germination were basically the same, which could be divided into 5 morphological types. Different varieties varied in cotyledon color, germ growth time and plumule length. The cotyledon of Reyan No.2, Verano, Seca and S. hippocampoides Fine stem stylo expanded when buds grew to 5.7, 4.0, 4.0 and 3.2 centimeters, respectively. Germ of Verano stylo ran out on fifth day of seed germination, while the other three kinds of stylo on the fourth day. Except Seca stylo,  the other three types had lateral roots. The bud length of Seca and Reyan No.2 stylo was longer than Verano Stylo, and Fine stem stylo was the shortest. 【Conclusion】Seed pod, seed coat color and cotyledon color during the germination, germ growth time and plumule length are different among the four varieties of stylo. These differences can be used as research indicators for seed characteristics, seed development mechanism and embryo germination.

基金项目:
作者简介:
参考文献:
服务与反馈:
文章下载】【加入收藏
总浏览数: 1 5 8 9 3 4 3 2  今日总人数: 6 0 2 1
主办:广西农业科学院    地址:广西南宁市大学东路174号   邮政编码:530007
电话:(+86)-771-3243905; (+86)-771-3244920   电子邮箱:nfnyxb@163.com
Copyright © 2011 Nfnyxb.com, All Rights Reserved  版权所有©2011《南方农业学报》编辑部   
 本系统由北京博思汇文数字科技有限公司设计开发 技术服务电话:010-60213898

;