摘要:
采用石蜡切片法,研究了14个橄榄种质的叶片解剖结构。结果表明,橄榄叶为典型的异面叶,上表皮由1～2层排列紧密的形状不规则细胞组成,上表皮厚度大于下表皮厚度,叶脉突起,栅栏组织由1～2层长柱形细胞组成,排列紧密;海绵组织细胞较短,排列较疏松,细胞间隙较大。不同种质在叶片厚度、表皮厚度、气孔密度、栅栏组织厚度等方面存在差异,但同一品种的叶脉突起度和细胞结构紧密度变化相对较小。据此探讨了橄榄叶片结构与其生态适应性及抗寒性的关系。
Abstract:
The anatomical leaf structure of Chinese olive was studied by means of paraffin section and microscopy imaging system.The results showed that the leaf was typical bifacial,upper epidermis consisted of 1-2 layers of rectangular,compactly arranged epidermal cells.The cuticle was thicker on the upper epidermis than on the lower epidermis,leaf vein was protuberant.The palisade tissue was composed of 1-2 layers of long,column-shaped,compactly arranged cells,while cells of the spongy were short and loosely arranged,with the bigger intracellular space.There were many differences that included the thickness of leaf blade,the thickness of epidermis,stomata density and the thickness of palisade tissue so on,but there were minor differences in VPD (vein protuberant degree i.e.thickness of vein/thickness of leaf blade) and CTR (cell tense ratio i.e.the thickness of palisade/thickness of leaf blade) of same variety.Furthermore,the paper discusses the relation of the leaf structure with the ecological adaptability and cold resistance in Chinese olive germplasm.
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