荒漠肉苁蓉种子萌发与吸器形成的形态学研究

Morphology of seed germination and haustorium formation in Cistanche deserticola

目的观察荒漠肉苁蓉种子萌发与吸器形成的形态发生过程。方法通过组织培养,采用光学显微镜和扫描电子显微镜对种子萌发及吸器形成过程进行了观察。结果种子在接种2周后,开始露白,然后形成芽管状器官,进一步顶端膨大成初生吸器。在初生吸器上,厚的带状表皮围成均匀窝状,窝内又均匀分布着乳头状突起。结论荒漠肉苁蓉种子萌发由胚根极的活动形成的单极性的幼苗发育方式。初生吸器是肉苁蓉黏着寄主的器官。

Object The process of seed germination and haustorium formation in Cistanche deserticola Y C Ma was observed Methods Seeds were inoculated on culture medium, the process of seed germination and haustorium formation were observed using light and electron microscopy Results The seedling sprouted after two weeks, then a tube like organ formed, finally the apex expanded to attachment organ The outer papillar surface of the extended apex bears wall protuberances that are encircled with a thick cuticular belt and covered with a thin cuticle Conclusion The seed germination of C deserticola is single pole of racidle The attachment organ adheres host first