烟草科技Issue(8)：79-84,90,7.
采收时间对烤烟碳氮代谢关键酶活性和烟叶化学成分的影响
Influence of Harvesting Time on Key Enzyme Activities to Carbon and Nitrogen Metabolism and Main Chemical Components in Flue-cured Tobacco
摘要
Abstract
To investigate the appearance characteristics of fully mature flue-cured tobacco leaves growing in Guangdong,the effects of harvesting time on the enzymes key to carbon and nitrogen metabolism and main chemical components in flue-cured tobacco were studied with field experiments.The results showed that:except for middle leaves,the amylase activity in tobacco leaves increased gradually,while nitrate reductase (NR)activity in tobacco leaves raised first,then declined with the delay of harvesting time.The delay of harvesting time was beneficial to reducing starch and total nitrogen contents,increasing total sugar and reducing sugar contents,and promoting nicotine accumulation.In upper leaves,amylase activity significantly negatively correlated to starch content,while NR activity extremely significantly positively correlated to total nitrogen content.In middle leaves,NR activity extremely significantly negatively correlated to starch content,while extremely significantly positively correlated to nicotine content.In lugs,amylase activity extremely significantly positively correlated to total sugar and nicotine contents,while extremely significantly negatively correlated to total nitrogen and protein contents.The current standard of leaf harvesting was proper for flyings,however,it was recommended to delay for 5-10 days for lugs,middle and upper leaves.Meanwhile,the appearance characteristics of mature flue-cured tobacco leaf in Guangdong were proposed.关键词
烤烟/采收时间/淀粉酶/硝酸还原酶/化学成分Key words
Flue-cured tobacco/ Harvesting time/ Amylase/ Nitrate reductase/ Chemical component分类
农业科技引用本文复制引用
王寒,林锐锋,彭琛,王维,邓世媛,陈建军,马长力..采收时间对烤烟碳氮代谢关键酶活性和烟叶化学成分的影响[J].烟草科技,2013,(8):79-84,90,7.基金项目
国家烟草专卖局重大科技项目"耐低温抗早花烤烟新品种选育及遗传生理机理研究"(110200902043) （110200902043）
广东省烟草专卖局(公司)资助项目"广东浓香型特色优质烟叶开发"(201101) （公司）
广东中烟工业有限责任公司科技计划项目"广东'双喜'品牌导向基地烤烟成熟度调控技术及其管理模式研究与应用"(粤烟工05XM-QK[2010]025). （粤烟工05XM-QK[2010]025）
