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    遮蔭條件下茶葉中兒茶素組分含量較低

    發布時間: 2015-12-29 14:20    來源: 中國茶葉學會      瀏覽記錄:

    兒茶素是茶葉最重要幾類品質與生化成分之一,對于人類健康具有重要作用,因此對兒茶素組分調控的研究一直是茶學研究的一個熱點。

     

    兒茶素合成途徑及龍井43、中黃2號兒茶素組分分析

    兒茶素合成途徑及龍井43、中黃2號兒茶素組分分析

     

    近日,中國農業科學院茶葉研究所茶樹遺傳育種創新團隊通過對兒茶素組成差異較大的兩個茶樹品種(龍井43,中黃2號)遮蔭與不遮蔭條件下兒茶素組分含量測定,發現遮蔭顯著降低所有兒茶素組分含量,但對二羥基化兒茶素(ECG、EC、C)與三羥基化兒茶素(EGCG、EGC、GC)組成比率的影響較小。進一步通過轉錄組測序從10.99萬條基因序列中發現了4個影響該兒茶素組成比率的關鍵基因,即CsF3′5′H1, CsF3′H1, CsF3′H2和CsF3′H3。這些基因表達量的比率與相應兒茶素組分比率極顯著正相關。同時,兩者的相關性在13個茶樹品種中也得到了進一步的驗證(r=0.934**)。

     

    13個茶樹品種中二羥基、三羥基兒茶素比率與4個關鍵基因表達量比率的相關性分析

    13個茶樹品種中二羥基、三羥基兒茶素比率與4個關鍵基因表達量比率的相關性分析

     

    該研究發現的4個關鍵基因將為明確茶葉兒茶素合成機制奠定基礎。研究結果在《PLoS ONE》(DOI: 10.1371/journal.pone.0137925)上發表。該研究得到了國家自然科學基金、現代農業產業技術體系、中國農業科學院科技創新工程等項目的支持。

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