| Influence of low phosphorus on nitrate reductive activity and NO3--N content in cowpea seedling |
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| DOI：10.7606/j.issn.1000-7601.2010.01.27 |
| Key Words: low phosphorus cowpea seedling NRA NO3--N soluble protein |
| Author Name | Affiliation | | QI Binglin | College of Life Sciences, Northwest A & F University, Yangling, Shaanxi 712100, China | | CAO Cuiling | College of Life Sciences, Northwest A & F University, Yangling, Shaanxi 712100, China | | WANG Fei | College of Life Sciences, Northwest A & F University, Yangling, Shaanxi 712100, China | | LEI Zhongping | College of Life Sciences, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHAO Qianru | College of Life Sciences, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Jun | College of Life Sciences, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Influence of low phosphorus stress on NO3--N content, NRA activity and protein content of roots and leaves in the three cowpea varieties was studied with the hydroponics experiment. The results showed that NO3--N content of root increased at first, then declined and NO3--N content of leaf declined under the low phosphorus stress conditions. At the same time, root soluble protein content of different varieties of cowpea was higher than the control level under the phosphorus stress, and declined with the stress time. In contrast, leaf soluble protein content was declined. Biomass accumulation in cowpea was seriously impacted in low phosphorus stress conditions. Inhibition of root growth was smaller than shoot, and compared with the control, root top ratio increased under low phosphorus stress. NRA activity of roots and leaves in cowpea declined, and and that of the control increased. |
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