| 廉满红,田宵鸿,曹翠玲.低磷条件下熊猫豆光合特性及碳水化合物累积变化研究[J].干旱地区农业研究,2011,29(5):87~93 |
| 低磷条件下熊猫豆光合特性及碳水化合物累积变化研究 |
| 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 |
| 中文关键词: 磷胁迫 光合作用 碳水化合物分配 酸性磷酸酶活性 |
| 英文关键词:phosphorous deficiency photosynthesis distribution of carbohydrates acid phosphatase activity |
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| 中文摘要: |
| 利用水培方法研究了熊猫豆对低磷胁迫随时间的生理响应。结果表明，磷胁迫下熊猫豆根系最大根长增加46%；但叶片面积变小，且发育延迟。缺磷时熊猫豆幼苗叶片光合速率、气孔导度、叶绿素含量以及蒸腾速率均下降，但是胞间CO2上升；缺磷植株还原性糖、可溶性总糖含量均降低，但是还原糖向根系的分配比例增加；缺磷植株根系活力上升、酸性磷酸酶活性上升。低磷胁迫下熊猫豆干物质累积量显著降低；地上部分干物质累积减少，根系干物质累积增加，因此低磷胁迫导致植物根冠比增大。 |
| 英文摘要: |
| 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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