| 外源甜菜碱对低温胁迫下油茶生理特性的影响 |
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| 引用本文： | 王国霞,卢超,赵奇,杨玉珍,郑钧屏,李春阁,张燕林.外源甜菜碱对低温胁迫下油茶生理特性的影响[J].西北林学院学报,2020,35(5):78-84. |
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| 作者姓名： | 王国霞 卢超 赵奇 杨玉珍 郑钧屏 李春阁 张燕林 |
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| 作者单位： | （郑州师范学院 生命科学学院，河南 郑州 450044） |
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| 摘 要： | 为探究外源甜菜碱缓解油茶低温胁迫的生理机制，以“大别山1号”油茶为材料，在人工气候室模拟自然低温进行低温变温处理，低温胁迫前以清水为对照，设置2个外源甜菜碱浓度（10、15 mmol·L-1）处理，分别于低温胁迫前1天、低温胁迫的第1、第3、第5天和恢复温度1 d后测定相对电导率、可溶性蛋白含量、可溶性糖含量、SOD酶活性、超氧阴离子含量的日变化。结果表明，低温胁迫下油茶相对电导率、可溶性蛋白含量、可溶性糖含量、SOD酶活性、超氧阴离子的含量随胁迫时间的延长而增加，恢复温度后上述指标均有所下降。3种处理上述指标的日变化趋势较为一致，均呈现先降低后增加的趋势，即与胁迫温度日变化相关。与清水对照处理相比，外源甜菜碱能够显著（P<0.05）缓解低温胁迫下油茶相对电导率的升高，增加可溶性糖、可溶性蛋白的含量，提高SOD酶活性，降低超氧阴离子的含量，从而增强油茶对低温胁迫的抗性。综合分析表明，10 mmol·L-1甜菜碱处理对提高油茶耐低温能力的效果最为显著。
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| 关 键 词： | 油茶 甜菜碱 低温胁迫 耐寒性 |
Effects of Exogenous Glycine Betaine on Physiological Characteristics of Camellia oleifera under Low Temperature Stress |
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| WANG Guo-xia,LU Chao,ZHAO Qi,YANG Yu-zhen,ZHENG Jun-ping,LI Chun-ge,ZHANG Yan-lin. Effects of Exogenous Glycine Betaine on Physiological Characteristics of Camellia oleifera under Low Temperature Stress[J].Journal of Northwest Forestry University,2020,35(5):78-84. |
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| Authors: | WANG Guo-xia LU Chao ZHAO Qi YANG Yu-zhen ZHENG Jun-ping LI Chun-ge ZHANG Yan-lin |
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| Institution: | （School of Life Sciences,Zhengzhou Normal University,Zhengzhou 450044,Henan,China） |
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| Abstract: | In order to explore the physiological mechanism of exogenous betaine to alleviate low temperature stress in Camellia oleifera,seedlings of a cultivar “Dabieshan No.1” was used as material that was subjected to low temperature stress simulated in an artificial climate chamber.Two exogenous betaine concentrations (10 and 15 mmol/L) and water (control) were set up to treat C.oleifera seedlings before low temperature stress.The diurnal changes of the parameters such as relative electrical conductivity,soluble protein content,soluble sugar content,SOD activity and superoxide anion content were measured on the following days:the day before stress,the first,third and fifth day after stress,the first day after recovering temperature.The results showed that the relative electrical conductivity,soluble protein content,soluble sugar content,SOD activity and superoxide anion content of C.oleifera increased with the prolongation of stress time under low temperature stress,and decreased after temperature recovery.The diurnal variation trends of these indexes in the three treatments were similar,showing a trend of first decreasing and then increasing,and were related to the diurnal variation of stress temperature.Compared with the control treatment,exogenous betaine could significantly alleviate the increase of relative electrical conductivity,increase the content of soluble sugar and protein,increase the activity of SOD,and decrease the content of superoxide anion under low temperature stress,thus enhancing the resistance of C.oleifera to low temperature stress.Comprehensive analysis showed that 10 mmol/L betaine treatment had the most significant effect on improving low temperature tolerance of C.oleifera. |
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| Keywords: | Camellia oleiferaCamellia oleifera Glycine betaine Low temperature stress Cold tolerance |
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