河南农业科学2016，Vol.45Issue(10)：24-28,5.
盐胁迫对谷子幼苗生长及光合特性的影响
Effect of Salt Stress on Growth and Photosynthetic Characteristics of Foxtail Millet Seedlings
摘要
Abstract
In order to provide theoretical foundation for millet cultivation in different saline-alkali land, the growth and photosynthetic characteristics of millet seedlings ( Yugu 17 ) were studied under different salt stress. Three kinds of salt were used in this study ( NaCl and Na2 SO4 as neutral salt, NaHCO3 as alkaline salt) with three concentrations(0% as CK, 0. 2% and 0. 4%). The results showed that with the increase of salt concentration, the leaf SPAD value, net photosynthetic rate, stomatal conductance and transpiration rate increased,intercellular CO2 concentration decreased first and then increased. The SPAD value was severely affected by NaCl treatment,which decreased by 24. 1% and 34. 0% under 0. 2% and 0. 4% concentration treatments compared with CK. However, the Na2 SO4 and NaHCO3 treatment influenced the net photosynthetic rate most,which decreased by 47. 8%,80. 2% and 38. 9%,85. 5%under 0. 2%,0. 4% Na2SO4 and NaHCO3. Under neutral salt stress,the water use efficiency(WUE) of seedling leaf increased first and then decreased,and the WUE of seedling leaf decreased under alkaline salt stress as the salt concentration elevated. The height and dry matter accumulation of seedlings decreased as the NaCl concentration increased,which however,increased first and then decreased with the elevation of Na2 SO4 and NaHCO3 concentration. Particularly,the dry matter accumulation of seedlings was most impacted by NaHCO3 when the salt concentration was 0. 4%, which decreased by 37. 0%. To conclude,it was more suitable for millet cultivation in saline-alkali land with low Na2 SO4 and NaHCO3 concentration than that with low NaCl concentration,while cultivation of millet in saline-alkali land with high Na2 SO4 and NaHCO3 concentration was not recommended.关键词
谷子/盐胁迫/叶绿素/光合特性/干物质Key words
foxtail millet/salt stress/chlorophyll/photosynthetic characteristics/dry matter分类
农业科技引用本文复制引用
徐心志,代小冬,杨育峰,马超,王雁楠,朱灿灿,秦娜,杨国红,李君霞..盐胁迫对谷子幼苗生长及光合特性的影响[J].河南农业科学,2016,45(10):24-28,5.基金项目
农业部/财政部"现代农业产业技术体系专项资金"项目( nycytx13 ) （ nycytx13 ）
"十二五"国家科技支撑计划项目(2014BAD07B01) （2014BAD07B01）
河南省农业科学院科研发展专项资金项目( 201412004 ) （ 201412004 ）
河南省重点科技攻关项目(152102110131) （152102110131）
国家自然科学基金项目(U1504314) （U1504314）
