A novel flavonoid from the root of Macrothelypteris torresiana(Gaud.) Ching

A novel flavonoid was isolated from the root of Macrothelypteris torresiana （Gaud.） Ching. The structure of the product was identified as 5, 7-dihydroxy-2-（1, 2-isopropyldioxy-4-oxocyclohex-5-enyl）-chromen-4-one on the ground of chemical and spectro-scopic methods.2009 Jin Lan Ruan. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

Two new flavanone glycosides from Macrothelypteris torresiana (Gaud.) Ching

Two new flavanone glycosides 1 and 2 were isolated from the aerial parts of Macrothelypteris torresiana （Gaud.） Ching. The structures of two products were identified as （2S）-5,7,2＇,5＇-tetrahydroxyflavanone-2＇-O-β-D-6＂-O-acetylglucopyranoside and （2S）- 5,7,2＇,5＇-tetrahydroxyflavanone-2＇-O-β-D-glucopyranoside on the basis of their chemical and spectral analysis, respectively.

普通针毛蕨配子体发育的研究

采用混合土培养普通针毛蕨（Macrothelypteris torresiana （Gaud．） Ching）孢子，显微镜下观察记录其孢子萌发及配子体发育过程。结果表明：孢子褐色，赤道面观为半圆形，极面观椭圆形，单裂缝。播种3d左右孢子萌发，萌发类型为书带蕨型，配子体发育为槲蕨型。播种7d左右发育为片状体，丝状体与片状体两阶段的界限不明显。原叶体边缘及背腹面均可产生毛状体。播种21d左右发育形成幼原叶体，成熟原叶体呈心脏形。播种35d左右开始有性器官出现，精子器近圆球形，由3个细胞组成，成熟颈卵器颈部由4列细胞组成，4～5层细胞高。原叶体受精后1个月内即可观察到从原叶体上生成的幼胚。