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.%The anatomical structure of nutritive organs of two Apocynum species(A. Carmabinum L. And A. Venetum L. ) were studied by using the method of paraffin section. The results were as follows: (l)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. Carmabinum,the palisade tissues of A. Venetum arranged more tight,but spongy tissues more loose. Vein tissues of A. Carmabinum 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 ofA. 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.
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