HU Yu-wen,CHAO Jian-guo,LU Qi-jie,et al.Photosynthesis and Physiological Responses of Atractylodes lancea to Different Phosphorus Supply Levels[J].HEILONGJIANG AGRICULTURAL SCIENCES,2018,(12):20-24.[doi:10.11942/j.issn1002-2767.2018.12.0020]
茅苍术对不同供磷水平的光合及生理响应
- Title:
- Photosynthesis and Physiological Responses of Atractylodes lancea to Different Phosphorus Supply Levels
- Keywords:
- Atractylodes lancea; phosphorus supply level; photosynthetic characteristics; physiological indexes
- 文献标志码:
- A
- 摘要:
- 为指导茅苍术优质生产及合理施肥，以茅苍术试验材料，采用盆栽试验方法，设置6个不同供磷水平，研究其对茅苍术光合特性及生理指标的影响。结果表明：当供磷水平为15 g?m-2时，茅苍术叶片的净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(Tr)值相对较高，胞间CO2浓度(Ci)值、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)活性和丙二醛(MDA)、脯氨酸(Pro)含量相对较低，植物体的生长状况良好。但供磷水平的过高或过低都使茅苍术叶片的光合作用受到抑制，其体内活性氧迅速积累加据细胞膜脂过氧化程度，细胞内外渗透压遭到破坏，从而使3种抗氧化酶活性及MDA、Pro的含量显著上升，由此表明15 g?m-2应是茅苍术生长的最适需磷量。
- Abstract:
- In order to guide the high quality production and reasonable fertilization,Atractylodes lancea was used as experimental material,with the potting experiment method，six different levels of phosphorus supply were set to study their effects on photosynthetic characteristics and physiological indexes of A.lancea,so as to provide a theoretical basis for the quality production and reasonable fertilization techniques of A.lancea.The results showed that,when the phosphorus supply level was 15 g?m-2,the net photosynthetic rate(Pn),stomatal conductance (Gs) and transpiration rate (Tr) of A.lancea were relatively high.While the intercellular CO2 concentration (Ci) values,activities of superoxide dismutase (SOD),catalase (CAT),peroxidase (POD) activity were relatively low,and contents of malondialdehyde (MDA),proline(Pro) were both low.The growth of plant was good.However,the high or low level of phosphorus supply inhibited the photosynthesis of the leaves of A.lancea,the rapid accumulation of active oxygen in the body added to the degree of cell membrane lipid peroxidation,and the osmotic pressure inside and outside the cells was destroyed.As a result,the activities of three antioxidant enzymes and contents of MDA and Pro increased significantly.It indicated that 15 g?m-2 should be the most suitable amount of phosphorus for the growth of A.lancea.
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备注/Memo
收稿日期：2018-08-20