CN103493694B - 一种提高龙井43茶树品种egcg含量的外源诱导方法 - Google Patents

一种提高龙井43茶树品种egcg含量的外源诱导方法 Download PDF

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CN103493694B
CN103493694B CN201310427138.5A CN201310427138A CN103493694B CN 103493694 B CN103493694 B CN 103493694B CN 201310427138 A CN201310427138 A CN 201310427138A CN 103493694 B CN103493694 B CN 103493694B
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CN103493694A (zh
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余继忠
崔宏春
郑旭霞
周铁锋
敖存
黄海涛
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Hangzhou Institute of Agricultural Sciences
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Abstract

本发明提供了一种提高龙井43茶树品种EGCG含量的外源诱导方法,包括如下步骤:配制含有酯类、盐类、增溶剂的外源诱导剂溶液,稀释后,均匀喷施于龙井43茶树,喷施后持续一定时间后,即达到外源诱导提高龙井43茶树品种EGCG含量的目的。本发明可使龙井43茶树品种EGCG含量提高25%-30%(高效液相色谱法分析检测)。

Description

一种提高龙井43茶树品种EGCG含量的外源诱导方法
技术领域
本发明属于茶叶种植领域,具体是一种提高龙井43茶树品种EGCG含量的外源诱导方法。
背景技术
龙井茶是众多名优绿茶产品中的佼佼者,具有“扁平挺直、滋味甘鲜醇厚、香气幽雅清高、汤色碧绿清莹、叶底细嫩成朵”等突出感官品质特点,在国内、国际上都享有盛誉。制作龙井茶的主要茶树品种为国家级良种龙井43,其主要功能成分EGCG的含量为7.5-8.0%。为提高国家级良种龙井43的保健品质,首要问题就是提高其主要功能成分EGCG的含量。
EGCG是茶树中非常重要的次生代谢物质,在抗衰老、抗癌、抑菌、预防心脑血管疾病、防辐射、减肥等方面具有显著的功能活性和药理功效。目前,EGCG不能人工合成,其唯一来源是茶树。如何提高茶树中EGCG含量,尤其是亟需提高保健品质的国家级良种龙井43,是茶学领域研究的一个热点和难点。利用可调控诱导***,如植物激素诱导、光诱导、温度诱导、愈伤诱导、胁迫诱导、化学诱导等,可使目的基因高效表达,从而提高某些特定生化成分含量。目前,已有关于外源诱导提高福鼎大白茶、铁观音品种EGCG含量的报道,但有关提高扁形名优绿茶代表品种龙井43中EGCG含量的外源诱导方法却鲜见报道。
发明内容
为了解决上述技术问题,本发明提供了一种提高龙井43茶树品种EGCG含量的外源诱导方法,为提高国家级良种龙井43的保健品质提供技术支持,为其进一步的研究和应用提供理论基础。
本发明的提高龙井43茶树品种EGCG含量的外源诱导方法,其特征在于该方法包括如下步骤:配制含有酯类、盐类、增溶剂的外源诱导剂溶液,稀释后,均匀喷施于龙井43茶树,喷施后持续一定时间后,即达到外源诱导提高龙井43茶树品种EGCG含量的目的。
所述的提高龙井43茶树品种EGCG含量的外源诱导方法,其特征在于所述的外源诱导剂溶液中酯类为甲酯类物质,浓度为0.1mol/L-0.5mol/L。
所述的提高龙井43茶树品种EGCG含量的外源诱导方法,其特征在于所述的外源诱导剂溶液中盐类为硫酸盐类,浓度为0.5mol/L-1.0mol/L。
所述的提高龙井43茶树品种EGCG含量的外源诱导方法,其特征在于所述的外源诱导剂溶液中增溶剂为醇酯类物质,添加量为0.1%-3.0%。
所述的提高龙井43茶树品种EGCG含量的外源诱导方法,其特征在于所述的外源诱导剂溶液稀释倍数为5倍-10倍,每次喷施剂量为30.0升/亩-50.0升/亩,喷施后持续时间为4-6天。
本发明的提高龙井43茶树品种EGCG含量的外源诱导方法,可使龙井43茶树品种EGCG含量提高25%-30%(高效液相色谱法分析检测)。
具体实施方式
实施例1:
选择长势良好的龙井43栽培茶园1亩,采摘不喷施外源诱导剂的龙井43茶树一芽二叶至一芽三叶鲜叶,蒸青固样,高效液相色谱法检测其EGCG含量为7.89%,以此为外源诱导处理的对照。
在上述的龙井43栽培茶园1亩中,首先,将30L外源诱导剂甲酯溶液(含有0.5mol/L甲酯类、0.8mol/L硫酸盐类、2.0%质量百分浓度的增溶剂),稀释10倍后,均匀喷施于2亩龙井43茶树上,喷施后持续时间4天,采摘龙井43茶树一芽二叶至一芽三叶鲜叶,蒸青固样,高效液相色谱法检测外源诱导剂处理后龙井43茶树中EGCG含量为10.20%,比外源诱导处理前提高29.53%。
实施例2:
选择长势良好的龙井43栽培茶园1亩,采摘不喷施外源诱导剂的龙井43茶树一芽二叶至一芽三叶鲜叶,蒸青固样,高效液相色谱法检测其EGCG含量为7.92%,以此为外源诱导处理的对照。
在上述的龙井43栽培茶园1亩中,首先,将40L外源诱导剂甲酯溶液(含有0.3mol/L甲酯类、0.7mol/L硫酸盐类、1.5%质量百分浓度的增溶剂),稀释8倍后,均匀喷施于2亩龙井43茶树上,喷施后持续时间4天,采摘龙井43茶树一芽二叶至一芽三叶鲜叶,蒸青固样,高效液相色谱法检测外源诱导剂处理后龙井43茶树中EGCG含量为10.21%,比外源诱导处理前提高28.91%。
实施例3:
选择长势良好的龙井43栽培茶园2亩,采摘不喷施外源诱导剂的龙井43茶树一芽二叶至一芽三叶鲜叶,蒸青固样,高效液相色谱法检测其EGCG含量为7.90%,以此为外源诱导处理的对照。
在上述的龙井43栽培茶园2亩中,首先,将90L外源诱导剂甲酯溶液(含有0.2mol/L甲酯类、0.5mol/L硫酸盐类、1.0%质量百分浓度的增溶剂),稀释6倍后,均匀喷施于2亩龙井43茶树上,喷施后持续时间5天,采摘龙井43茶树一芽二叶至一芽三叶鲜叶,蒸青固样,高效液相色谱法检测外源诱导剂处理后龙井43茶树中EGCG含量为10.20%,比外源诱导处理前提高29.11%。
实施例4:
选择长势良好的龙井43栽培茶园1亩,采摘不喷施外源诱导剂的龙井43茶树一芽二叶至一芽三叶鲜叶,蒸青固样,高效液相色谱法检测其EGCG含量为7.82%,以此为外源诱导处理的对照。
在上述的龙井43栽培茶园1亩中,首先,将50L外源诱导剂甲酯溶液(含有0.3mol/L甲酯类、0.6mol/L硫酸盐类、1.0%质量百分浓度的增溶剂),稀释8倍后,均匀喷施于2亩龙井43茶树上,喷施后持续时间5天,采摘龙井43茶树一芽二叶至一芽三叶鲜叶,蒸青固样,高效液相色谱法检测外源诱导剂处理后龙井43茶树中EGCG含量为10.15%,比外源诱导处理前提高29.80%。
实施例5:
选择长势良好的龙井43栽培茶园2亩,采摘不喷施外源诱导剂的龙井43茶树一芽二叶至一芽三叶鲜叶,蒸青固样,高效液相色谱法检测其EGCG含量为7.85%,以此为外源诱导处理的对照。
在上述的龙井43栽培茶园2亩中,首先,将60L外源诱导剂甲酯溶液(含有0.1mol/L甲酯类、0.3mol/L硫酸盐类、0.5%质量百分浓度的增溶剂),稀释5倍后,均匀喷施于2亩龙井43茶树上,喷施后持续时间6天,采摘龙井43茶树一芽二叶至一芽三叶鲜叶,蒸青固样,高效液相色谱法检测外源诱导剂处理后龙井43茶树中EGCG含量为10.12%,比外源诱导处理前提高29.30%。
以上所述仅为本发明的较佳实施例,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均包含在本发明的保护范围之内。

Claims (2)

1.一种提高龙井43茶树品种EGCG含量的外源诱导方法,其特征在于该方法包括如下步骤:配制含有酯类、盐类、增溶剂的外源诱导剂溶液,稀释后,均匀喷施于龙井43茶树,喷施后持续一定时间后,即达到外源诱导提高龙井43茶树品种EGCG含量的目的;所述的外源诱导剂溶液中酯类为甲酯类物质,浓度为0.1mol/L-0.5mol/L;所述的外源诱导剂溶液中盐类为硫酸盐类,浓度为0.5mol/L-1.0mol/L;所述的外源诱导剂溶液中增溶剂为醇酯类物质,添加量为0.1%-3.0%。
2.根据权利要求1所述的提高龙井43茶树品种EGCG含量的外源诱导方法,其特征在于所述的外源诱导剂溶液稀释倍数为5倍-10倍,每次喷施剂量为30.0升/亩-50.0升/亩,喷施后持续时间为4-6天。
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