中文摘要：

茶树组织培养是开展茶树次生代谢及调控研究重要的研究平台。在建立茶树愈伤组织培养体系的基础上,开展了茶树含不同儿茶素含量的细胞系筛选方法的研究。结果表明,在H、S和B 3种诱导培养基中,只有B培养基适合于诱导生长迅速、组织疏松、质地均一且具有一定儿茶素合成能力的愈伤组织。从外植体方面考虑,种子诱导出的愈伤组织具有较强的植株再生能力;幼茎和叶片诱导出的愈伤组织,其生长速度快、组织疏松,但再生能力弱。在此基础上,采用目视法和二分法,结合HPLC分析,对B培养基诱导的细胞系＂yunjing63Y＂进行了筛选,得到含不同儿茶素含量的细胞系＂yunjing63Y＂和＂yunjing63X＂。分析结果显示,细胞系＂yunjing63Y＂和＂yunjing63X＂的儿茶素组分与鲜叶相似,且二者儿茶素含量（干重）差异较大,前者为7.77 mg·g^-1,后者为0.13 mg·g^-1。

英文摘要：

The callus culture of tea plant provides a good platform for the regulation and metabolism of secondary metabolites in the tea plant. This research carried out the work in screening for tea cell lines containing different catechin contents based on the callus culture of the tea plant. The results showed that among H, S and B induction mediums, only B medium was fitted for inducing and screening callus which were quickly grown, loosely organized, even textured and produced a good amount of catechins. Callus induced from tender stems and leaves grew quickly and loosely, but its regeneration ability to plants was weak. Cell lines ＂yunjing63Y＂, ＂yunjing63X＂ with different catechin contents were obtained by the visual method, dichotomy, and HPLC analysis. The results showed that catechin components in the two cell lines were similar to those in the fresh tea leaves, but the catechin contents in cell lines ＂yunjing63Y＂and ＂yunjing63X＂ differed obviously. The catechin contents（DW） of the former was 7.77 mg·g^-1, and the latter was 0.13 mg·g^-1.