CPPU对‘阳光玫瑰’葡萄品质及香气合成相关基因表达的影响
发布时间:2019-02-25 13:31
【摘要】:[目的]研究不同质量浓度细胞分类素(CPPU)对葡萄果实香气组分及合成相关基因表达的影响,为阐明香气物质的合成提供理论依据。[方法]以‘阳光玫瑰’葡萄为材料,在花期时用25 mg·L~(-1)GA_3处理花序,花后2周时用25 mg·L~(-1)GA_3+0 mg·L~(-1)CPPU处理果穗作为对照(CK),设置25 mg·L~(-1)GA_3+5 mg·L~(-1)CPPU(Ⅰ)、25 mg·L~(-1)GA_3+10 mg·L~(-1)CPPU(Ⅱ)、25 mg·L~(-1)GA_3+15 mg·L~(-1)CPPU(Ⅲ)3个处理,采用实时荧光定量PCR法研究香气合成相关基因脱氧木酮糖磷酸合酶基因(DXS3)、香叶基二磷酸合酶基因(GPPS)和里那醇合成酶基因(LIS)的表达变化,并利用GC-MS技术测定葡萄香气组分。[结果]与对照相比,处理Ⅰ和Ⅱ的果实显著增大、增重,可滴定酸含量和可溶性固形物有所下降,外观品质提高,处理Ⅲ因CPPU浓度过高而引起葡萄品质下降。与对照相比,香气种类减少,萜类物质特征香气里那醇、顺式氧化里那醇、香叶醇等相对含量降低,风味变淡,且CPPU浓度过高,不利于香气的产生。与对照相比,经不同浓度CPPU处理的果实中香气合成相关基因DXS3、GPPS、LIS表达量高峰推迟且峰值下调,浓度越高,推迟时间越久,峰值更低,基因表达受抑制,这与萜类物质相对含量降低相一致。[结论]25 mg·L~(-1)GA_3+5 mg·L~(-1)CPPU处理能够改善‘阳光玫瑰’葡萄外观品质并保证内在品质。
[Abstract]:[objective] to study the effects of different concentrations of cytotaxin (CPPU) on aroma components and gene expression of grape fruit, and to provide a theoretical basis for elucidating the synthesis of aroma substances. [methods] the inflorescence of 'Sunshine Rose' grape was treated with 25 mg L ~ (-1) GA_3 at anthesis and 25 mg L ~ (-1) GA_3 0 mg L ~ (-1) CPPU with 25 mg L ~ (-1) GA_3 0 mg L ~ (-1) CPPU at 2 weeks after anthesis as control (CK),. Set 25 mg L ~ (- 1) GA_3 5 mg L ~ (- 1) CPPU (鈪,
本文编号:2430232
[Abstract]:[objective] to study the effects of different concentrations of cytotaxin (CPPU) on aroma components and gene expression of grape fruit, and to provide a theoretical basis for elucidating the synthesis of aroma substances. [methods] the inflorescence of 'Sunshine Rose' grape was treated with 25 mg L ~ (-1) GA_3 at anthesis and 25 mg L ~ (-1) GA_3 0 mg L ~ (-1) CPPU with 25 mg L ~ (-1) GA_3 0 mg L ~ (-1) CPPU at 2 weeks after anthesis as control (CK),. Set 25 mg L ~ (- 1) GA_3 5 mg L ~ (- 1) CPPU (鈪,
本文编号:2430232
本文链接:https://www.wllwen.com/kejilunwen/jiyingongcheng/2430232.html
最近更新
教材专著