摘要
采用盆栽砂培实验,研究不同NaCl浓度(0,25,50,75,100 mmol·L^-1)对花期荆芥离子吸收、分布和挥发油成分的影响。结果表明,随着NaCl浓度的增加,荆芥根、茎、叶、花中Na+含量显著增加,且地上部位的Na^+含量逐渐高于根部;根中K^+含量降低,而茎、叶、花中K+含量有所增加;Ca2+含量随着NaCl浓度的变化而上下波动,但总体受盐胁迫的影响较小。荆芥各部位K^+/Na^+,Ca^2+/Na^+随NaCl浓度的增加而降低。中度盐胁迫(50 mmol·L^-1NaCl)促进荆芥挥发油含量增加,重度盐胁迫(100 mmol·L^-1NaCl)抑制挥发油的合成和积累。荆芥挥发油中98%以上的物质为萜类成分,以胡薄荷酮和薄荷酮的含量最高。盐胁迫对荆芥挥发油组成成分的种类影响小,但改变了各主要成分所占的比例。盐胁迫促使胡薄荷酮向薄荷酮转化,胡薄荷酮/薄荷酮值(相对含量)随盐浓度的增加而降低,薄荷酮相对含量在75,100 mmol·L^-1NaCl处理下高于胡薄荷酮成为第一主成分。其他成分如D-柠檬烯在中度和重度盐胁迫下含量上升,石竹烯含量仅在轻度盐胁迫下增加。该研究可为盐渍化土壤条件下荆芥的规范化栽培提供理论参考。
In this paper,a pot experiment using quartz sands was conducted to study the effects of different concentrations of NaCl(0,25,50,75,100 mmol·L^-1)on the ion absorption,distribution and essential oil components of flowering Schizonepeta tenuifolia.The results showed that as NaCl concentration increased,Na+content of root,stem,leaf and flower increased significantly,and that of the aerial parts was in a higher level than in the root.Regarding the K+content,it decreased in the root but increased in stem,leaf and flower.Some changes were detected in the Ca^2+content,but not significant on the whole.The value of K^+/Na^+and Ca^2+/Na+reduced as a result of increasing NaCl concentrations.The content of essential oil increased under medium salt treatment(50 mmol·L^-1NaCl).However,the synthesis and accumulation of essential oil was inhibited by the serious salt treatment(100 mmol·L^-1NaCl).Over 98%of the essential oil components were terpenes,in which pulegone and menthone were the most two abundant compounds.Varieties of essential oil components did not change significantly under salt stress but their relative proportions did.The transformation of pulegone to menthone was enhanced and the value of pulegone/menthone based on their relative contents decreased with NaCl concentration increasing.Consequently,menthone ranked the most abundant compound by replacing pulegone.Relative content of D-limonene increased under medium and serious salt stress,and that ofβ-caryophyllene only increased under mild treatments.So our research could provide references for the standard cultivation on saline soil of S.tenuifolia.
作者
周莹
黄丽瑾
赵永娟
唐楠煜
屈仁军
唐晓清
王康才
ZHOU Ying;HUANG Li-jin;ZHAO Yong-juan;TANG Nan-yu;QU Ren-jun;TANG Xiao-qing;WANG Kang-cai(Institute of Chinese Medicinal Materials,Nanjing Agricultural University,Nanjing 210095,China)
出处
《中国中药杂志》
CAS
CSCD
北大核心
2018年第22期4410-4418,共9页
China Journal of Chinese Materia Medica
基金
国家公益性行业科研专项(201407002)
2017年中医药公共卫生服务补助专项(财社[2017]66号)
国家级大学生创新创业训练计划项目(201710307028)
关键词
荆芥
盐胁迫
离子
挥发油
Schizonepeta tenuifolia
salt stress
ion
essential oil
