福建秃房野生茶种质资源新纪录及其子房微形态观察

Micro-morphology of Wild Ovary-Glabrous Tea Germplasms in Fujian

【目的】观察云霄、诏安野生茶种质资源子房微形态,为福建特色茶树种质资源的发掘、鉴定提供参考依据。【方法】利用冷场发射扫描电镜对29份野生茶种质资源的子房微形态性状进行观察分析。【结果】福建云霄县和诏安县的野生茶种质资源分为秃房资源和茸房资源2种类型,其中子房茸毛少、极少和秃房种质占72.4%,茸房种质子房茸毛密度存在差异且茸毛主要分布在子房上部;子房外壁纹饰分为凹陷型、平展型和凸起型3种类型,云霄种质子房外壁纹饰多为凹陷型,诏安种质子房外壁纹饰多为平展型。【结论】福建首次发现野生秃房茶树群体种质资源,该群体的茶树子房微形态特征具有明显的多样性,且云霄、诏安野生茶种质资源子房外壁纹饰地域差异明显。

【Objective】Micro-morphology of ovaries from the wild tea germplasms in Yunxiao and Zhao'an was examined to facilitate the identification and resource collection of tea germplasms in Fujian.【Method】The morphological characteristics of the ovaries from 29 wild tea germplasms were studied under a field emission scanning electron microscope(FE-SEM).【Result】The germplasms collected in Yunxiao and Zhao'an were classified by the morphology of their ovaries into the glabrous and trichome types.Those had a few,scarce or none trichomes on the ovary accounted for 72.4%of all.The trichomes were found mainly on the top of an ovary that determined the overall density and classification of a germplasm.The exine ornamentation on an ovary could be concave,flat or convex in appearance.Those on the ovaries of Yunxiao germplasms were mostly concave,while those of Zhao'an largely flat.【Conclusion】This study made the first report on the abovementioned observations.The micro-morphology of the ovary-glabrous germplasms displayed distinct difference on the exine ornamentation between the cultivars collected from Yunxiao and Zhao'an.