藏药材江才嘎保的显微特征研究

Microscopic study of traditional Tibetan medicine M. nepalensis D. Don var. alba(Hand-Mazz.) Y.C. Tang

目的:研究藏药材江才嘎保的显微特征.方法:采用石蜡切片法对藏药材江才嘎保的根、茎、叶作永久制片,并对全草做粉末制片,在显微镜下进行观察.结果:根的木质部宽广,导管单个或2-5个成群,放射状排列;茎表面偶见单细胞非腺毛,髓部宽广,形成层不明显;叶肉组织中栅栏细胞2列,不通过主脉,主脉维管束外韧性;粉末浅黄绿色,螺纹导管,淀粉粒较多.结论:以上特征具有鉴别意义,可做为鉴别江才嘎保的科学依据.

Objective： To study the microscopical features of traditional Tibetan medicine Morina nepalensis D. Don var. alba（Hand-Mazz.） Y.C. Tang. Methods： Paraffin section was used and the microstructures of transverse section of root, stem, leaf and powder was observed. Results： Calcium oxalate crystal clusters were found in the tissue structures of the roots, stems, leaves and powder; xylem of the root was broad, vessel single or 2-5in groups, radially; non-glandular hair single cell occasionally visible in stem epidermis, pith broad, cambium was not obvious; palisade tissue 2 rows and it did not get through the midrib. Collateral vascular bundle was visible in midrib. Powder was yellowish-green, spiral vessels and starch grains abundance. Conclusion： The microscopic characteristics are very significant, and it can be considered as scientific references for identifying of M. nepalensis var. alba.