| Effect of nitrogen concentration and form on leaf minimum conductance of winter wheat seedlings |
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| DOI：10.7606/j.issn.1000-7601.2012.05.16 |
| Key Words: leaf minimum conductance nitrogen concentration and form wheat seedlings |
| Author Name | Affiliation | | ZUO Lixiang | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China；
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHAO Limin | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China；
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Yangyang | State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China | | LI Junhui | Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Leaf minimum conductance (gmin) reflects leaf residual transpiration after stomatal closure, thus it is one important aspect of plant drought resistance. The effect of nitrogen concentration and form on gmin is studied in this research aimed to elucidate related physiological mechanism of nitrogen nutrition on plant drought resistance. The results indicated that gmin of high nitrogen concentration (15 mmol/L) was lower than that of low nitrogen concentra
tion (2 mmol/L) for nitrate and ammonium treatments but no difference of gmin existed between two nitrogen levels for ammonium nitrate treatment. Nitrogen form had no effect on gmin. Nitrogen concentration had no effect on the morphological
and physiological traits related with gmin, nitrogen form also had no effect on specific leaf weight, tricome density, wax load and crystal structure and stomatal traits, but it had significant effect on leaf water content, ammonium treatments had lower water content than the other two treatments. Pearson correlation analysis indicated gmin was significantly and positively related with specific leaf weight, suggesting the difference of gmin is caused by specifc leaf weight in this study, nitrogen form did not affect plant drought resistance through change of gmin. |
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