摘要
[目的]研究不同浓度的外源硒对植物生长的影响。[方法]以丝瓜“泰国中绿”为试验材料,以滤纸为介质,在培养皿中采用0、1.0、1.5、2.0、2.5和5.0μmol/L亚硒酸钠溶液处理丝瓜幼苗,研究不同浓度外源硒对丝瓜幼苗根长、茎长、茎粗、根体积、叶绿素含量及光合特性的影响。[结果]外源硒对丝瓜幼苗生长相关指标均有不同程度的影响,低浓度硒(1.0~2.5μmol/L)处理对丝瓜根长、茎粗、根体积及叶绿素b含量具有一定的促进作用,2.0和2.5μmol/L的硒显著促进了丝瓜芽长和整个植株的生长、光合特性的提升,1.5和2.0μmol/L硒显著提高了叶绿素a含量;但5.0μmol/L的硒对丝瓜根长和植株的生长具有抑制作用,并显著降低了叶绿素a、类胡萝卜素含量、光合速率、蒸腾速率和气孔导度。[结论]适宜浓度的亚硒酸钠对丝瓜生长具有一定的促进作用,且2.0~2.5μmol/L是亚硒酸钠促进丝瓜生长的最佳浓度,硒浓度过高会抑制丝瓜生长。
[Objective]To study the effects of exogenous selenium at different concentrations on plant growth.[Method]With luffa‘Thailand Zhonglu’as the test material,filter paper as the medium,0,1.0,1.5,2.0,2.5 and 5.0μmol/L sodium selenite solution was used to treat luffa seedlings to study the effects of different concentrations of exogenous selenium on root length,stem length,stem diameter,root volume,chlorophyll content and photosynthetic characteristics of luffa seedlings.[Result]Exogenous selenium had different effects on the growth related indexes of luffa seedlings.Low concentration selenium(1.0-2.5μmol/L)treatment had a certain promoting effect on root length,stem diameter,root volume and chlorophyll b,2.0 and 2.5μmol/L selenium significantly promoted the bud length,the growth of the whole plant and photosynthetic characteristics,1.5 and 2.0μmol/L selenium significantly increased the content of chlorophyll a,but 5.0μmol/L selenium inhibited the root length and plant growth of luffa,and significantly reduced the content of chlorophyll a and carotenoids,photosynthetic rate,transpiration rate and stomatal conductance.[Conclusion]The proper concentration of sodium selenite can promote the growth of luffa to a certain extent,and 2.0-2.5μmol/L is the best concentration of sodium selenite to promote the growth of luffa,and excessive selenium concentration will inhibit the growth of luffa.
作者
李慧敏
毕佳慧
张倩玉
张向丰
于佳
高一帆
孙红艳
王小云
LI Hui-min;BI Jia-hui;ZHANG Qian-yu(School of Chemical and Biological Engineering,Taiyuan University of Science and Technology,Taiyuan,Shanxi 310024)
出处
《安徽农业科学》
CAS
2022年第22期34-37,共4页
Journal of Anhui Agricultural Sciences
基金
山西省重点研发计划项目(201903D221066)
山西省省属科研条件质量提升专项技术开发实验室建设项目(201901)
国家自然科学基金(31401319)
太原科技大学大学生创新创业训练计划项目(XJ2020048)。
关键词
硒
丝瓜
生长
叶绿素含量
光合特性
Selenium
Luffa
Growth
Chlorophyll content
Photosynthetic characteristics
作者简介
李慧敏(1999-),女,山西广灵人,从事植物逆境生理研究;通信作者:王小云,正高级工程师,博士,从事农业面源污染和植物生理研究。
