| Effects of elevated CO2 concentration on the growth of wheat seedlings under different water potential and nutrition concentrations |
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| DOI：10.16302/j.cnki.1000-7601.2015.01.009 |
| Key Words: elevated CO2 concentration nitrogen water stress wheat seedling dry matter accumulation |
| Author Name | Affiliation | | SI Fu-yan1,2, QIAO Yun-zhou1, DONG Bao-di1, SHI Chang-hai1, JIANG Jing-wei3, CHEN Qin-qin1,2, ZHENG Xin1,2, LIU Meng-yu1 | (1.中国科学院遗传与发育生物学研究所农业资源研究中心，河北省节水农业重点实验室，中国科学院农业水资源重点实验室，石家庄 050021；2.中国科学院大学， 北京 100049； 3.山东农业大学水利土木工程学院， 山东 泰安 271018) |
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| Abstract: |
| On the basis of hydroponic experiment, this pot study included five nitrogen concentration levels (N0、N1、N2、N3、N4), three PEG concentration levels (P0、P1、P2), and two CO2 concentrations (370±50 μmol·mol-1； 700±50 μmol·mol-1). We studied the growth, dry matter accumulation and distribution, and water relation of wheat seedlings in different conditions. The results showed that plant height, shoot dry weight, root weight, biomass, and leaf water potential reached their maximums at N1P0, and so were the effects of elevated CO2 concentration. Maximal root length and root to shoot ratio appeared at N0P0 and N1P2 respectively. The biggest influence of elevated CO2 arose under the same condition. High CO2 concentration could mostly improve the growth of wheat seedlings at appropriate condition. At the same time, elevated CO2 could improve leaf water potential of wheat seedlings, which reduced the negative effects of PEG stress to some extent. Therefore, elevated CO2 concentration would improve the growth of wheat and remit the negative effects of mild water stress, whereas subtle effect might be observed if wheat growth was under severe drought. |
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