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广西三种主要海草的茎叶解剖结构研究(PDF)

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2013年01期
页码:
25
栏目:
系统与演化植物学
出版日期:
2013-01-25

文章信息/Info

Title:
Stem and leaf anatomical structures of three seagrass species in Guangxi
作者:
谢伟东1 朱栗琼1 招礼军1 邱广龙23 范航清123*
1.广西大学 林学院, 南宁 530004; 2.广西科学院 广西红树林研究中心, 广西 北海 536000; 3.广西红树林保护重点实验室, 广西 北海 536000
Author(s):
XIE WeiDong1 ZHU LiQiong1 ZHAO LiJun1 QIU GuangLong23 FAN HangQing123*
1.College of Forestry, Guangxi University, Nanning 530004, China; 2.Guangxi Mangrove Research Centre, Guangxi Sciences of Academy, Beihai 536000, China; 3.Guangxi Key Laboratory for Mangrove Conservation, Beihai 536000, China
关键词:
海草 根状茎 解剖结构 生态适应
Keywords:
seagrasses rhizome leafanatomical structure ecological adaptability
分类号:
Q174
DOI:
10.3969/j.issn.1000-3142.2013.01.003
文献标识码:
A
摘要:
利用光学显微镜观察了分布于广西北部湾沿岸的三种主要海草(矮大叶藻、二药藻和喜盐草)的茎叶解剖构造。结果表明:(1)三种海草的叶片结构和根状茎均有发达的气腔组织,叶肉及皮层细胞数量较少,且胞间隙明显;(2)叶肉及皮层中夹杂有纤维群,皮层薄壁细胞均有不同程度的木质化现象;(3)维管束结构简化,主要起机械支持作用而非输导功能。这些特征反映出矮大叶藻、二药藻和喜盐草对海洋环境中海浪和潮汐冲击、光等胁迫的高度适应。
Abstract:
Under optical microscope,the anatomical observations were made on the rhizomes and leaves of Zostera japonica,Halodule uninervis and Halophila ovalis. The results were as followed:(1)welldeveloped aerenchymaes and distinct intercellular space were found both at the rhizomes and leaves structure in all three seagrass species,while mesophylls and cortical cells were less compared to the general terrestrial plants; (2)fiber clusters were found between mesophylls and cortices,and lignified parenchyma cells were also found inside cortices; (3)the structures of vascular bundles,playing a role of mechanical support rather than conducting tissue,were simplified. The anatomical structure of leaf and rhizome in these seagrass species reflected their greatly ecological adaptability to the surrounding highwave and lowlight habitat.

参考文献/References

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2013-01-25