| Effect of phosphorous stress on photosynthesis characteristics and distribution of carbohydrate of Phaseolus coccineus L. seedlings |
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| DOI：10.7606/j.issn.1000-7601.2011.05.16 |
| Key Words: phosphorous deficiency photosynthesis distribution of carbohydrates acid phosphatase activity |
| Author Name | Affiliation | | LIAN Manhong | College of Life Sciences, Yangling, Shaanxi 712100, China | | TIAN Xiaohong | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | CAO Cuiling | College of Life Sciences, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Effect of phosphorus levels and treatment time on some physiological characteristics of Phaseolus coccineus L. were studied by hydroponic culture method. The results showed that the root length under the low availability of no phosphorus was about 46% higher than that of the control, while the leaf area was decreased when the culture solution had lower phosphate. When there had lower phosphorus supplied, the root activity and acid phosphatase activity was increased. Under phosphorus deficiency, both photosynthetic rate and chlorophyll content were decreased, but intercellular CO2 was increased; both reducing sugar content and total soluble sugar content were decreased; and root activity and acid phosphatase were increased. Under phosphorus deficiency, the dry mass decreased remarkably; shoot dry mass decreased; while root dry mass increased. These results show that phosphorus deficiency affects the distribution of carbohydrates. |
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