摘要
为黄芩种植和抗性育种提供依据,采用模拟盐胁迫和添加外源硅组合处理商洛1年生黄芩幼苗,通过测定净光合速率、气孔导度、孔限制数、细胞间CO_2浓度和叶绿素含量等指标,探讨外源硅对盐胁迫下黄芩幼苗光合特性的影响。结果表明:盐胁迫导致商洛黄芩幼苗光合作用受到明显抑制,随着添加外源硅浓度的增加,黄芩幼苗的光合速率、气孔导度、孔限制数、细胞间CO_2浓度和叶绿素含量均呈先升后降趋势,且各指标均在K_2SiO_3浓度为0.05g/L时达峰值,分别为32.9μmol/(m^2·s)、0.458 mmol/(m^2·s)、0.479、250μmol/mol和1.7mg/g,光合作用最强。
The net photosynthetic rate(Pn),stomatal conductance(Gs),limited stomates(Ls),intercellular CO2concentration(Ci)and chlorophyll content of Scutellaria baicalensis seedlings treated with exogenous silicon solution under simulated NaCl stress are determined to discuss the effect of exogenous silicon on photosynthetic characteristics of S.baicalensis seedlings and to provide the scientific basis for cultivation and resistance breeding of S.baicalensis.Results:The salt stress inhibits the photosynthesis of S.baicalensis seedlings obviously.The Pn,Gs,Ls,Ci and chlorophyll content of S.baicalensis seedlings show the first rising and then declining trend with increase of exogenous silicon concentration.The Pn,Gs,Ls,Ci and chlorophyll content of S.baicalensis seedlings are32.9μmol/(m2·s),0.458mm ol/(m2·s),0.479,250μmol/mol and1.7mg/g respectively when the exogenous silicon concentration is0.05g/L,which indicates that the photosynthesis of S.baicalensis seedlings reaches the maximum.
作者
华智锐
李小玲
HUA Zhirui;LI Xiaoling(College of Biology Pharmacy and Food Engineering,Shangluo University,Shangluo,Shaanxi 726000,China)
出处
《贵州农业科学》
CAS
2018年第1期86-89,共4页
Guizhou Agricultural Sciences
基金
陕西省科技厅项目(2017NY-027)
关键词
黄芩
外源硅
盐胁迫
光合特性
Scutellaria baicalensis
exogenous silicon
NaCl stress
photosynthetic characteristics
作者简介
华智锐(1980-),男,副教授,从事植物抗性生理与植物育种研究。E-mail:huazhirui2000@163.com
