Root morphology and physiological characteristics in <em>Carya cathayensis</em> seedlings with low phosphorus stress

LI Yong-fu; JIN Song-heng; YE Zheng-qian; HUANG Jian-qin; JIANG Pei-kun

doi:10.11833/j.issn.2095-0756.2010.02.013

Volume 27 Issue 2

Apr. 2010

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LI Yong-fu, JIN Song-heng, YE Zheng-qian, HUANG Jian-qin, JIANG Pei-kun. Root morphology and physiological characteristics in Carya cathayensis seedlings with low phosphorus stress[J]. Journal of Zhejiang A&F University, 2010, 27(2): 239-245. doi: 10.11833/j.issn.2095-0756.2010.02.013

Citation:

LI Yong-fu, JIN Song-heng, YE Zheng-qian, HUANG Jian-qin, JIANG Pei-kun. Root morphology and physiological characteristics in Carya cathayensis seedlings with low phosphorus stress[J]. Journal of Zhejiang A&F University, 2010, 27(2): 239-245. doi: 10.11833/j.issn.2095-0756.2010.02.013

Root morphology and physiological characteristics in Carya cathayensis seedlings with low phosphorus stress

doi: 10.11833/j.issn.2095-0756.2010.02.013

1.
School of Environmental Science and Technology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China;
2.
Joint Laboratory of Forest Soil and the Environment，Zhejiang Forestry College & ISSCAS，Lin’an 311300，Zhejiang，China;
3.
The Key Laboratory for Modern Silvicultural Technology of Zhejiang Province， Zhejiang Forestry College，Lin’an 311300，Zhejiang，China

More Information

Corresponding author: LI Yong-fu
Publish Date: 2010-04-20

Abstract

Phosphorus（P） deficiency is one of the limiting factors to plant growth. However，scarce information is available about the effect of P deficiency on the growth of Carya cathayensis. To study root morphology，leaf photosynthesis characteristics，leaf acid phosphatase，and root secreted acid phosphatase of Carya cathayensis seedlings，a hydroponic culture experiment with treatments of sufficient P（0.1 mmolL－1） or deficient P（0.02 mmolL－1） was conducted. Results showed that compared to sufficient P，the low P treatment significantly decreased（P＜0.05） plant dry weight，plant P concentration，plant P accumulation，root length，root surface area，root volume leaf photosynthetic rate，and stomatal conductance； however，there were no significant differences for intercellular CO2 concentration. Additionally，the low P treatment significantly increased （P＜0.05） leaf acid phosphatase （by 135%） and root secreted acid phosphatase （by 159%）. Thus，the low P treatments with decreases in leaf photosynthetic rate and stomatal conductance，but no differences for intercellular CO2 concentration，showed that leaf photosynthetic rate was not due to stomatal limitation. Also，for C. cathayensis an increase in acid phosphatase activity induced by a P deficiency could be an adaptive mechanism to low P stress.［Ch，4 fig. 1 tab. 28 ref.］
- forest biology,
- Carya cathayensis,
- low phosphorus stress,
- root morphology,
- photosynthetic characteristics,
- acid phosphatase

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Root morphology and physiological characteristics in Carya cathayensis seedlings with low phosphorus stress

1. School of Environmental Science and Technology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China;

2. Joint Laboratory of Forest Soil and the Environment，Zhejiang Forestry College & ISSCAS，Lin’an 311300，Zhejiang，China;

3. The Key Laboratory for Modern Silvicultural Technology of Zhejiang Province， Zhejiang Forestry College，Lin’an 311300，Zhejiang，China

Corresponding author: LI Yong-fu

Publish Date: 2010-04-20

Key words:

Abstract: Phosphorus（P） deficiency is one of the limiting factors to plant growth. However，scarce information is available about the effect of P deficiency on the growth of Carya cathayensis. To study root morphology，leaf photosynthesis characteristics，leaf acid phosphatase，and root secreted acid phosphatase of Carya cathayensis seedlings，a hydroponic culture experiment with treatments of sufficient P（0.1 mmolL－1） or deficient P（0.02 mmolL－1） was conducted. Results showed that compared to sufficient P，the low P treatment significantly decreased（P＜0.05） plant dry weight，plant P concentration，plant P accumulation，root length，root surface area，root volume leaf photosynthetic rate，and stomatal conductance； however，there were no significant differences for intercellular CO2 concentration. Additionally，the low P treatment significantly increased （P＜0.05） leaf acid phosphatase （by 135%） and root secreted acid phosphatase （by 159%）. Thus，the low P treatments with decreases in leaf photosynthetic rate and stomatal conductance，but no differences for intercellular CO2 concentration，showed that leaf photosynthetic rate was not due to stomatal limitation. Also，for C. cathayensis an increase in acid phosphatase activity induced by a P deficiency could be an adaptive mechanism to low P stress.［Ch，4 fig. 1 tab. 28 ref.］

Root morphology and physiological characteristics in Carya cathayensis seedlings with low phosphorus stress

doi: 10.11833/j.issn.2095-0756.2010.02.013

Abstract

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Root morphology and physiological characteristics in Carya cathayensis seedlings with low phosphorus stress

doi: 10.11833/j.issn.2095-0756.2010.02.013

Corresponding author: LI Yong-fu

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Root morphology and physiological characteristics in Carya cathayensis seedlings with low phosphorus stress

doi: 10.11833/j.issn.2095-0756.2010.02.013

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Root morphology and physiological characteristics in Carya cathayensis seedlings with low phosphorus stress

doi: 10.11833/j.issn.2095-0756.2010.02.013

Corresponding author: LI Yong-fu

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