Seasonal variation of foliar δ^(13)C values and its indictor significance in Sabina przewalskii and Sabina chinensis  

作　　者：Tuo Chen HuiJuan Pei YouFu Zhang LongYing Wen HongGuan Tang YuanQing He 

机构地区：[1]State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou, Gansu 730000, China [2]Henan University of Science and Technology, Luoyang, Henan 471003, China

出　　处：《Research in Cold and Arid Regions》2011年第2期143-148,共6页寒旱区科学（英文版）

基　　金：supported by the National Public Benefit Research Foundation of China (No. 200806036);the National Natural Science Foundation of China (No.30770342 and No.30670319);China Postdoctoral Science Foundation (No.20090460743)

摘　　要：Seasonal variation of foliar δ13C values as well as proline, silicon, MDA and relative water content in Sabina przewalskii Kom. and S. chinensis （Lin.） Ant. were measured. The results show that foliar δ13C values were significantly different at different seasons： lower in winter but higher in summer. δ13C values were positively correlated with air temperature and soil temperature. This demonstrates that foliar δ13C of Sabina is a successful empirical indictor of temperature. Furthermore, foliar δ13C values were positively related to proline and silicon content, and negatively related to relative water content and MDA content. Compared with S. chinensis, S. przewalskii has higher δ13C values, proline and silicon content as well as lower MDA and relative water content. All these results provided strong evidence that it is feasible for δ13C to be regarded as another index to evaluate freezing tolerance of Sabina.Seasonal variation of foliar δ13C values as well as proline, silicon, MDA and relative water content in Sabina przewalskii Kom. and S. chinensis （Lin.） Ant. were measured. The results show that foliar δ13C values were significantly different at different seasons： lower in winter but higher in summer. δ13C values were positively correlated with air temperature and soil temperature. This demonstrates that foliar δ13C of Sabina is a successful empirical indictor of temperature. Furthermore, foliar δ13C values were positively related to proline and silicon content, and negatively related to relative water content and MDA content. Compared with S. chinensis, S. przewalskii has higher δ13C values, proline and silicon content as well as lower MDA and relative water content. All these results provided strong evidence that it is feasible for δ13C to be regarded as another index to evaluate freezing tolerance of Sabina.

关 键 词：SABINA carbon isotope composition seasonal changes freezing tolerance 

分 类 号：S791.44[农业科学—林木遗传育种] S157.1[农业科学—林学]