IANG Bo,SONG Hang,ZHOU Xianrong,et al.Anatomical Studies on Vegetative Organs of Torreya fargesii Franch.[J].Northern Horticulture,2018,42(06):67-73.[doi:10.11937/bfyy.20173001]
巴山榧树营养器官的解剖学研究
- Title:
- Anatomical Studies on Vegetative Organs of Torreya fargesii Franch.
- Keywords:
- Torreya fargesii; root; stem; leaf; anatomical structure
- 文献标志码:
- A
- 摘要:
- 以2年生巴山榧树幼苗为试材，采用常规石蜡切片方法和光学显微技术，研究了巴山榧树根、茎、叶的解剖结构，以期为巴山榧树的深入研究与保护利用提供参考依据。结果表明：2年生巴山榧树幼苗根的结构由周皮、次生维管组织和初生木质部组成；根内无髓部和树脂道；次生韧皮部中无石细胞。茎的结构由周皮、皮层、次生维管组织、初生木质部和髓组成；木质部中无树脂道，有少量木薄壁组织细胞；木射线单列。叶片结构由上下表皮、叶肉组织和叶脉组成；表皮细胞壁显著增厚，具角质层；气孔仅分布于下表皮，下表皮气孔带区域具有分叉的角质钉；叶肉组织分化为栅栏组织和海绵组织，叶肉中具有分枝状石细胞；维管束1条，在维管束的远轴面内生树脂道1个，泌脂细胞2~3层。
- Abstract:
- Pot cultivated 2-year-old Torreya fargesii seedlings were used as test materials,the anatomical structure of root,stem and leaf were studied by using conventional paraffin section method and optical microscopy,to provide the reference for further research,protection and utilization of T.fargesii.The results showed that the structure of root of 2-year-old T.fargesii seedling was composed of periderm,secondary vascular tissue and primary xylem.There were no pith and resin duct in root,and no stone cells in the secondary phloem.The stem structure was composed of periderm,cortex,secondary vascular tissue,primary xylem and pith.There were no resin duct and a small amount of parenchyma cells,and single xylem ray in xylem of stem.The leaf structure was composed of the upper and lower epidermises,mesophyll tissue and vein.The epidermal cell wall was thickened with a cuticle,stomata were only distributed in the lower epidermis,and there were more branched horny nails in the stomatal zone.The mesophyll tissue differentiated into palisade tissue and spongy tissue,with branched stone cells in mesophyll.There was one vascular bundle in leaf,and one resin duct was distributed in abaxial side of vascular bundle with 2-3 layers resinosis cell.
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备注/Memo
第一作者简介：江波（1974-），男，重庆人，硕士，讲师，研究方向为植物学。E-mail：jblmz74@126.com.责任作者：周先容（1968-），男，四川渠县人，硕士，教授，现主要从事植物资源与植物生态等研究工作。E-mail：zxrfsy@163.com.基金项目：国家自然科学基金资助项目（31470568）。收稿日期：2017-10-12