水分胁迫对广藿香叶绿素荧光特征的影响
Effects of Water Stress on Chlorophyll Fluorescence of Pogostemon cablin (Blanco)Benth.
黄艳萍 1袁萍 1沈晓萌 1黄勇红 1刘浩1
作者信息
- 1. 南药资源保护与利用工程技术开发研究中心,广东食品药品职业学院,广东广州510520
- 折叠
摘要
以广藿香为供试材料,采用盆栽试验方法,研究不同土壤水分对广藿香叶绿素荧光参数的影响.结果表明,土壤水分胁迫对广藿香初始荧光(R)、最大荧光(Fm)、可变荧光(Fv)、PSⅡ最大光化学效率(Fv/Fm)、PSⅡ电子传递量子产率(Φ聊)均有显著影响(P＜0.05);随着土壤水分胁迫强度增大和胁迫时间的延长,广藿香光化学效率(E/Fm)呈下降趋势,下降程度表现为土壤田间最大持水量的20％(RWC 20％)＞土壤田间最大持水量的95％(RWC 95％)＞土壤田间最大持水量的40％(RWC 40％)＞土壤田间最大持水量的80％(RWC 80％)＞土壤田间最大持水量的60％(RWC 60％);RWC 60％处理广藿香叶绿素荧光参数水平最佳,此土壤水分条件有利于广藿香生长.
Abstract
The effects of different soil water contents on the chlorophyll fluorescence parameters of Pogostemon cablin (Blanco) Benth.were studied by using a pot experiment.The results showed that soil water stress had significant effects (P ＞ 0.05) on Pogostemon cablin (Blanco) Benth.initial fluorescence(F0),maximum fluorescence (Fm,),variable fluorescence (Fv),maximal photochemical efficiency (Fv/Fm) and quantum yield of PSⅡelectron transport(ΦPPSⅡ);with the increasing of water stress intensity and the extending of stress time,the photochemical efficiency (Fv/Fm) of Pogostemon cablin (Blanco) Benth.decreased presenting as RWC 20％ ＞ RWC 95％ ＞ RWC 40％ ＞ RWC 80％ ＞ RWC 60％;the chlorophyll fluorescence parameters under the condition of RWC 60％ were optimal,these soil water conditions were more suitable for the growth of Pogostemon cablin (Blanco) Benth.
关键词
广藿香/水分胁迫/叶绿素荧光/影响Key words
Pogostemon cablin (Blanco) Benth./Water stress/Chlorophyll fluorescence/Influence引用本文复制引用
基金项目
广东省科技计划项目(2011B020301007)
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据