YU Song,ZHENG Lina,LI Xin,et al.Effects of NaCl and NaHCO3 Stress on Seedlings Growth and Photosynthetic Characteristics of Common Bean[J].Northern Horticulture,2018,42(23):1-8.[doi:10.11937/bfyy.20182229]
NaCl和NaHCO3胁迫对芸豆幼苗生长及光合特性的影响
- Title:
- Effects of NaCl and NaHCO3 Stress on Seedlings Growth and Photosynthetic Characteristics of Common Bean
- Keywords:
- saline-alkali stress; common bean; seedling growth; chlorophyll content; gas exchange parameters; chlorophyll fluorescence parameter
- 文献标志码:
- A
- 摘要:
- 以“黑芸豆”和“日本白”芸豆品种为试材，比较分析了0（对照）、50、100、150 mmol·L-1 NaCl和NaHCO3胁迫处理下芸豆品种幼苗的生长特性，探讨了叶片叶绿素含量、光合作用气体交换参数及叶绿素荧光参数等指标的变化差异，以期探究中性盐和碱性盐胁迫条件下，芸豆苗期生长和光合特性对于逆境的响应差异。结果表明：NaCl和NaHCO3处理均不同程度的抑制了芸豆幼苗的生长，相比于对照（0 mmol·L-1）处理，低浓度（50 mmol·L-1）的中性盐和碱性盐胁迫对株高、根长及干物质积累无显著影响，而当胁迫浓度≥100 mmol·L-1时，盐碱胁迫显著抑制了芸豆生长，碱性盐胁迫对芸豆生长抑制更为明显，且“日本白”较“黑芸豆”对盐碱胁迫浓度水平变化响应更为明显。同时，随着盐碱胁迫浓度的不断增加，芸豆叶片叶绿素含量、净光合速率（Pn）、气孔导度（Gs）、蒸腾速率（Tr）、PSII最大光化学量子产量（Fv/Fm）总体上呈不断下降趋势，胞间CO2浓度（Ci）呈不断升高趋势。通过对幼苗生长和光合特性等指标的分析表明，“黑芸豆”较“日本白”有更强的盐碱适应能力。
- Abstract:
- Two varieties ‘Heiyundou’ and ‘Ribenbai’ were used as test materials.Growth characteristics of different common bean varieties were compared and analyzed based on the different NaCl concentration (0(CK)，50，100，150 mmol·L-1) treatments and NaHCO3 concentrations (0(CK)，50，100，150 mmol·L-1) treatments，respectively，variation difference of chlorophyll content，photosynthesis gas exchange parameters and chlorophyll fluorescence parameters were discussed.In order to investigate the difference of growth and photosynthetic characteristics between common bean seedlings cultured on the neutral salt stress and alkaline salt stress condition.The results showed that both NaCl and NaHCO3 treatments inhibited the growth of common bean seedlings in different degrees.Compared with the control treatment，the neutral salt and alkaline salt stress of low concentration (50 mmol·L-1) had no significant effect on plant height，root length and dry matter accumulation，but when the stress concentration was more than 100 mmol·L-1，all the neutral salt stress and alkaline salt stress significantly inhibited the common bean seedlings growth，and the inhibition of alkaline salt stress was more serious.Moreover，the response of ‘Ribenbai’ to saline-alkaline stress was more rapid than that of ‘Heiyundou’.At the same time，with the increasing of saline-alkaline stress concentration，chlorophyll content，net photosynthetic rate (Pn)，stomatal conductance (Gs)，transpiration rate (Tr)，and the maximum photochemical quantum yield (Fv/Fm) of common bean leaves decreased，but the CO2 concentration (Ci) increased continuously.The analysis of seedling growth and photosynthetic characteristics showed that ‘Heiyundou’ had stronger adaptability of saline-alkaline stress condition than ‘Ribenbai’.
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备注/Memo
第一作者简介：于崧（1984-），女，黑龙江大庆人，博士，讲师，现主要从事植物生理生态等研究工作。E-mail:byndys@163.com.责任作者：于立河（1960-），男，黑龙江五常人，博士，教授，现主要从事植物生理生态与栽培技术等研究工作。E-mail:yulihe2002@126.com.基金项目：黑龙江省青年科学基金资助项目（QC2017022）；国家农业部公益性行业（农业）科研专项资助项目（201303007）；国家科技支撑计划资助项目（2014BAD07B05）；黑龙江省大学生创新创业训练计划资助项目（201610223009）；高校学成、引进人才科研启动计划资助项目（XYB2014-02）。收稿日期：2018-08-13