秦岭木姜子油细胞的分布和结构研究

STUDIES ON THE DISTRIBUTION AND STRUCTURE OF OIL CELLS IN LITSEA TSINLINGENSIS

利用组织透明法和石蜡制片法研究秦岭木姜子各器官内油细胞的结果表明：其根、茎、叶和果实内都有油细胞分布。但它们在大小、数量上存在差异：根的皮层和茎的次生木质部射线中的油细胞体积最小，直径１６－２５μｍ，且数量较少；果实果肉中的油细胞体积最大，直径约７０μｍ，数量也最多；根的次生韧皮部薄壁组织、茎的皮层和髓以及叶肉组织中的油细胞大小和数量则介于前两者之间，直径约４０μｍ。油细胞多数为单个散在，呈球形或椭圆形，体积较周围的细胞大，细胞质内含大的油滴，细胞壁内具木栓质化的壁层。

The oil cells in four organs of Litsea tsinlingensis were studied with the method of tissue clearing and the method of paraffin sectioning.The results are as follows:The oil cells distribute in root,stem,leaf and fruit,but there are some differences in their size and amount.The volume of oil cells,which distribute in the cortex of root and in the rays of the secondary xylem of stem,is the smallest.Their diameter is 16-25 μm,moreover,their amount is less;the volume of oil cells,which distribute in the mesocarp of fruit,is the biggest.Their diameter is about 70 μm,and their amount is larger.The size and amount of oil cells in the secondary phelem of root,in the cortex and pith of stem and in the mesophyll of leaf are between the two formers.Their diameter is about 40 μm.Usually,typical oil cells are single and isolated,and their shape is spherical or ellipsoid.Their volume is larger than surrounding cells.The mature oil cells always contain a big oil drop,and the wall of oil cells also has a suberized middle layer.