摘要
通过分析茉莉酸甲酯(methyl jasmonate,MeJA)处理对羟基红花黄色素A(hydroxysafflor yellow A,HSYA)生物合成相关基因表达影响及不同花色HSYA生物合成相关基因表达差异,为HSYA生物合成及调控提供参考。首先用0、50、100、200μmol·L^(-1)的MeJA对离体培养的红花花冠进行处理,找出最适MeJA处理浓度,然后用100μmol·L-1 MeJA处理红花,在处理后的0、3、6、12、24 h不同时间点采样,用高效液相色谱法对HSYA的含量进行定量分析,找出最佳处理时间;以100μmol·L^(-1) MeJA处理6 h的红花花冠提取RNA,通过qRT-PCR对参与HSYA生物合成的关键基因进行定量分析,找出表达差异基因;用HPLC和qRT-PCR对不同花色红花品系的HSYA含量及其相关合成基因进行定量分析,找出差异基因。结果表明,不同浓度的MeJA处理均能够显著增加HSYA的积累,其中100μmol·L^(-1)MeJA处理6 h后HSYA的含量达到最高峰。qRT-PCR结果显示,MeJA处理红花花冠能够显著提高HSYA合成关键基因PAL2、PAL4、4CL2、4CL4、4CL5、CHS3、CHS4和CHI2的转录水平。不同花色红花中HSYA含量不同,呈现红色>橙黄色>黄色>白色的趋势,qRT-PCR结果表明CHS1和CHI2在红色、橙黄色、黄色红花中的表达量明显高于白色。以上研究表明MeJA对HSYA合成的调控主要通过影响PAL2、PAL4、4CL2、4CL4、4CL5、CHS3、CHS4和CHI2的转录水平来实现;CHS1和CHI2的基因表达差异是不同花色红花HSYA含量不同的主要因素。
To explore the mechanism hydroxysafflor yellow A(HSYA)biosynthesis and regulation,the effect of methyl jasmonate(MeJA)treatment on gene expression related to the biosynthesis of hydroxysafflor yellow A(HSYA)was analyzed,and expression differences in genes involved in HSYA biosynthesis in safflower of different colors was quantified.MeJA at concentrations of 0,50,100,and 200μmol·L^(-1) was sprayed onto safflower florets to determine the optimal concentration of MeJA.Safflower was treated with 100μmol·L^(-1) MeJA and florets were harvested 0,3,6,12 and 24 h after treatment.The content of MeJA was determined by high performance liquid chromatography(HPLC).RNA was extracted from safflower florets treated with 100μmol·L^(-1) MeJA for 6 h.The transcription of key genes involved in the biosynthesis of HSYA was quantified by qRT-PCR and differentially expressed genes were identified.The content of HSYA increased after treatment with MeJA,with 100μmol·L^(-1 )MeJA treatment for 6 h having the greatest effect on HSYA accumulation.qRT-PCR results showed that MeJA could significantly increase the transcription of HSYA biosynthesis genes including PAL2,PAL4,4CL2,4CL4,4CL5,CHS3,CHS4 and CHI2.The content of HSYA differed between safflowers of different colors with a trend of red>orange-yellow>yellow>white.The results of qRT-PCR showed that the expression of CHS1 and CHI2 in red,orange and yellow safflower was significantly higher than that in white safflower.These results indicate that MeJA promotes the accumulation of HSYA by up-regulating the expression of genes involved in the biosynthesis of HSYA such as PAL2,PAL4,4CL2,4CL4,4CL5,CHS3,CHS4 and CHI2,and the variation of HSYA content in safflower of different colors was related to a difference in the level of expression of CHS1 and CHI2.
作者
谭政委
李磊
杨红旗
余永亮
许兰杰
董薇
夏伟
马新明
梁慧珍
TAN Zheng-wei;LI Lei;YANG Hong-qi;YU Yong-liang;XU Lan-jie;DONG Wei;XIAWei;MA Xin-ming;LIANG Hui-zhen(Henan Sesame Research Center,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;College of Information and Management Science,Henan Agricultural University,Zhengzhou 450002,China)
出处
《药学学报》
CAS
CSCD
北大核心
2020年第12期2982-2988,共7页
Acta Pharmaceutica Sinica
基金
现代农业产业技术体系建设专项资金资助(CARS-21)
河南省农科院创新创意项目(2020CX03)
河南省农科院优秀青年基金项目(2020YQ05,2020YQ28)
河南省博士后基金项目(001803053)
国家农业科研杰出人才及其创新团队“特种油料作物品质改良创新团队”[农财发(2016)45号].
关键词
红花
茉莉酸甲酯
羟基红花黄色素A
表达差异
safflower
methyl jasmonate
hydroxysafflor yellow A
expression difference
