两种罗布麻营养器官的解剖结构及其生态适应性

王东清1; 2; $21; 2*; $21; 2

引用本文:	王东清1，2，李国旗1，2*，刘亚武1，2.两种罗布麻营养器官的解剖结构及其生态适应性[J].广西植物,2011,(5):588-594.[点击复制]
	WANG Dong Qing1，2，LI Guo Qi1，2*，LIU Ya Wu1，2.Anatomical research on nutritive organs of two species of Apocynum and their ecological adaptability[J].Guihaia,2011,(5):588-594.[点击复制]

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两种罗布麻营养器官的解剖结构及其生态适应性
王东清1，2，李国旗1，2*，刘亚武1，2
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.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

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。

关键词: 罗布麻营养器官解剖结构

DOI：

分类号:Q944.53

基金项目:

Anatomical research on nutritive organs of two species of Apocynum and their ecological adaptability

WANG DongQing1，2，LI GuoQi1，2*，LIU YaWu1，2

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

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.

Key words: Apocynum nutritive organs anatomical structure