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|本期目录/Table of Contents|

两种罗布麻营养器官的解剖结构及其生态适应性

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2011年05期
页码:
588
栏目:
系统与演化植物学
出版日期:
2011-09-25

文章信息/Info

Title:
Anatomical research on nutritive organs of two species of Apocynum and their ecological adaptability
作者:
王东清12 李国旗12* 刘亚武12
1.宁夏大学 西北退化生态系统恢复与重建教育部重点实验室, 银川 750021; 2.宁夏大学 西部生态与生物资源开发联合研究中心, 银川 750021
Author(s):
WANG DongQing12LI GuoQi12*LIU YaWu12
1.Key Laboratory for Restoration and Regeneration of Degenerated Ecosystem in Northwest China of Ministry of Education, Ningxia University, Yinchuan 750021, China; 2.United Research Center for Exploitation of Ecological and Biological Resources in West China, Ningxia University, Yinchuan 750021, China
关键词:
罗布麻 营养器官 解剖结构
Keywords:
Apocynum nutritive organs anatomical structure
分类号:
Q944.53
DOI:
-
文献标识码:
A
摘要:
采用石蜡切片法,对红麻和大麻状罗布麻的营养器官进行解剖学观察。结果显示:(1)红麻和大麻状罗布麻叶片均为异面叶,叶片表皮均被不同厚度的角质层,气孔具孔下室,栅栏组织2层;红麻的栅栏组织比大麻状罗布麻的排列紧密,而海绵组织比大麻状罗布麻的排列疏松;大麻状罗布麻叶片主脉厚度平均值为489.61 μm,而红麻仅为369.29 μm,差异达到极显著;(2)红麻和大麻状罗布麻茎的维管束均属典型的双韧维管束结构;(3)红麻根的周皮层数(4~5层)比大麻状罗布麻的(5~7层)少,二者的皮层厚度平均值分别为698.23和744.11 μm,差异不显著;(4)二者根、茎、叶中富含大量分泌细胞。结果表明,2种罗布麻均具有适应干旱环境的能力,且大麻状罗布麻在宁夏地区引种栽培具有可行性。
Abstract:
The anatomical structure of nutritive organs of two Apocynum species(A.cannabinum L.and A.venetum L.)were studied by using the method of paraffin section. The results were as follows:(1)The leaf of two Apocynum species was bifacial. The leafepidermal cell of two species had cuticle layer with different thickness. Substomatic chamber developed well. Both had two layers of palisade tissues. Compared with A.cannabinum,the palisade tissues of A.venetum arranged more tight,but spongy tissues more loose. Vein tissues of A.cannabinum developed well and the thickness of major vein was up to 489.61 μm,significantly thicker than that in A.venetum(369.29 μm). (2)The vascular bundle of stem for both Apocynum species typically belong to bicollateral bundle. (3)There were 4-5 layers of periderm cells in roots ofA.venetum,while 5-7 layers in A.cannabinum. There was a large root cortex tissue for both species.(4)A large number of secretory cells were observed in the roots,stems and leaves for both species. The anatomical investigation indicated that both the two Apocynum species were characterized as xeromorphism to cope with the arid environments.

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: 2011-09-25