摘要
本研究以留兰香薄荷幼苗为试验材料,以自然光(W)为对照,采用红光(R)、蓝光(B)和红蓝混合光(RB)进行光照处理,探究不同光质对留兰香薄荷生长、生理指标和次生代谢物合成的影响.研究结果表明,不同光质可影响留兰香薄荷植株茎段生根率、茎段腋芽萌发率、茎粗、叶片数、地上部分鲜重、叶片含水率等生长指标;红光和红蓝混合光可显著增加叶片中可溶性糖含量.叶片中可溶性蛋白质含量随蓝光比例升高而升高;红蓝混合光处理叶片中叶绿素含量显著高于对照,红光和蓝光处理叶片中叶绿素含量也均有一定的提升.其中红光主要影响叶绿素a含量,而蓝光影响叶绿素b含量.与对照相比,红光和蓝光处理留兰香薄荷次生代谢产物香芹酮含量降低.红蓝混合光可促进留兰香薄荷香芹酮的积累,降低D-柠檬烯含量,并提高部分萜烯类化合物占比.不同光质可影响留兰香薄荷生长及生理指标,且红蓝混合光可改变留兰香薄荷次生代谢产物含量,为提高薄荷药用价值及工厂化繁育提供了依据.
Abstract
In this study,the seedlings of Mentha spicata L.were treated with red light(R),blue light(B)and red-blue mixed light(RB),and natural light(W)was used as control.Moreover,the effects of light quality on the growth,physiological indices and secondary metabolite synthesis of menthol were studied.The results showed that different light qualities could affect the rooting rate,axillary bud germination rate,stem diameter,number of leaves,fresh weight of aboveground parts and leaf moisture content.Red Light and red-blue mixed light significantly increased the soluble sugar content in leaves.The content of soluble protein in leaves increased with the increase of the ratio of blue light,the chloro-phyll content in red-blue mixed light treatment was significantly higher than that in the control,and the chlorophyll content in red light treatment and blue light treatment was also increased.Red light mainly affected the content of chlorophyll a,while blue light affected the con-tent of chlorophyll b.Compared with the control,the con-tent of carvone,a secondary metabolite of menthol,was decreased under red light treatment and blue light treat-ment.Red-blue mixed light promoted the accumulation of carvone,decreased the content of D-limonene and increased the proportion of some terpene compounds.Different light qualities can affect the growth and physiological indexes of Mentha spicata L.,and the red-blue mixed light can change the content of secondary metabolites,which provides a basis for impro-ving the medicinal value and industrial breeding of menthol.
基金项目
上海市地方院校能力建设专项(20070502500)
上海植物种质资源工程技术研究中心项目(17DZ2252700)
国家科技期刊平台
NSTL
万方数据