MycorrhizaeV1, Main, Corpus, bibRecord, 003712

Influences of excessive Cu on photosynthesis and growth in ectomycorrhizal Pinus sylvestris seedlings.

Identifieur interne : 003712 ( Main/Corpus ); précédent : 003711; suivant : 003713

Influences of excessive Cu on photosynthesis and growth in ectomycorrhizal Pinus sylvestris seedlings.

Auteurs : Yi Huang ; Shu Tao

Source :

Journal of environmental sciences (China) [ 1001-0742 ] ; 2004.

RBID : pubmed:15272714

English descriptors

KwdEn :
- Chlorophyll (analysis), Chlorophyll A (MeSH), Copper (toxicity), Mycorrhizae (growth & development), Photosynthesis (MeSH), Pinus (microbiology), Pinus (physiology), Plant Roots (microbiology), Seedlings (MeSH), Soil Pollutants (toxicity).
MESH :
- chemical , analysis : Chlorophyll.
- chemical , toxicity : Copper, Soil Pollutants.
- chemical : Chlorophyll A.
- growth & development : Mycorrhizae.
- microbiology : Pinus, Plant Roots.
- physiology : Pinus.
- Photosynthesis, Seedlings.

Abstract

Growth and photosynthesis responses were measured for Scots pine (Pinus sylvestris L. cv.) inoculated with ectomycorrhizal fungi (Suillus bovinus) under 6.5 and 25 mg/L Cu treatments to evaluate ectomycorrhizal seedlings' tolerance to heavy metal stress. Results showed that excessive Cu can significantly impair the growth and photosynthesis of pine seedlings, but such impairment is much smaller to the ectomycorrhizal seedlings. Under 25 mg/L Cu treatment, the dry weight of ectomycorrhizal seedlings is 25% lower than the control in contrary to 53% of the non-mycorrhizal seedlings, and the fresh weight of ectomycorrhizal roots was significantly higher than those of non-mycorrhizal roots, about 25% and 42% higher at 6.5 and 25 mg/L Cu treatments respectively. Furthermore, ectomycorrhizal fungi induced remarkable difference in the growth rate and pigment content of seedlings under excessive Cu stress. At 25 mg/L Cu, the contents of total chlorophyll, chlorophyll-a and chlorophyll-b were 30% higher in ectomycorrhizal plants than those in non-mycorrhizal plants. O2 evolution and electron transport of PSI and PSII were restrained by elevated Cu stress. However, no significant improvement was observed in reducing the physiological restraining in ectomycorrhizal seedlings over the non-mycorrhizal ones.

PubMed: 15272714

Links to Exploration step

pubmed:15272714

Le document en format XML

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<author><name sortKey="Huang, Yi" sort="Huang, Yi" uniqKey="Huang Y" first="Yi" last="Huang">Yi Huang</name>
<affiliation><nlm:affiliation>College of Environmental Sciences, Peking University, Beijing 100871, China. yhuang@urban.pku.edu.cn</nlm:affiliation>
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<author><name sortKey="Tao, Shu" sort="Tao, Shu" uniqKey="Tao S" first="Shu" last="Tao">Shu Tao</name>
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<affiliation><nlm:affiliation>College of Environmental Sciences, Peking University, Beijing 100871, China. yhuang@urban.pku.edu.cn</nlm:affiliation>
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<author><name sortKey="Tao, Shu" sort="Tao, Shu" uniqKey="Tao S" first="Shu" last="Tao">Shu Tao</name>
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<series><title level="j">Journal of environmental sciences (China)</title>
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<term>Chlorophyll A (MeSH)</term>
<term>Copper (toxicity)</term>
<term>Mycorrhizae (growth & development)</term>
<term>Photosynthesis (MeSH)</term>
<term>Pinus (microbiology)</term>
<term>Pinus (physiology)</term>
<term>Plant Roots (microbiology)</term>
<term>Seedlings (MeSH)</term>
<term>Soil Pollutants (toxicity)</term>
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<front><div type="abstract" xml:lang="en">Growth and photosynthesis responses were measured for Scots pine (Pinus sylvestris L. cv.) inoculated with ectomycorrhizal fungi (Suillus bovinus) under 6.5 and 25 mg/L Cu treatments to evaluate ectomycorrhizal seedlings' tolerance to heavy metal stress. Results showed that excessive Cu can significantly impair the growth and photosynthesis of pine seedlings, but such impairment is much smaller to the ectomycorrhizal seedlings. Under 25 mg/L Cu treatment, the dry weight of ectomycorrhizal seedlings is 25% lower than the control in contrary to 53% of the non-mycorrhizal seedlings, and the fresh weight of ectomycorrhizal roots was significantly higher than those of non-mycorrhizal roots, about 25% and 42% higher at 6.5 and 25 mg/L Cu treatments respectively. Furthermore, ectomycorrhizal fungi induced remarkable difference in the growth rate and pigment content of seedlings under excessive Cu stress. At 25 mg/L Cu, the contents of total chlorophyll, chlorophyll-a and chlorophyll-b were 30% higher in ectomycorrhizal plants than those in non-mycorrhizal plants. O2 evolution and electron transport of PSI and PSII were restrained by elevated Cu stress. However, no significant improvement was observed in reducing the physiological restraining in ectomycorrhizal seedlings over the non-mycorrhizal ones.</div>
</front>
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<DateCompleted><Year>2004</Year>
<Month>09</Month>
<Day>28</Day>
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<DateRevised><Year>2018</Year>
<Month>11</Month>
<Day>30</Day>
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<Title>Journal of environmental sciences (China)</Title>
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<Abstract><AbstractText>Growth and photosynthesis responses were measured for Scots pine (Pinus sylvestris L. cv.) inoculated with ectomycorrhizal fungi (Suillus bovinus) under 6.5 and 25 mg/L Cu treatments to evaluate ectomycorrhizal seedlings' tolerance to heavy metal stress. Results showed that excessive Cu can significantly impair the growth and photosynthesis of pine seedlings, but such impairment is much smaller to the ectomycorrhizal seedlings. Under 25 mg/L Cu treatment, the dry weight of ectomycorrhizal seedlings is 25% lower than the control in contrary to 53% of the non-mycorrhizal seedlings, and the fresh weight of ectomycorrhizal roots was significantly higher than those of non-mycorrhizal roots, about 25% and 42% higher at 6.5 and 25 mg/L Cu treatments respectively. Furthermore, ectomycorrhizal fungi induced remarkable difference in the growth rate and pigment content of seedlings under excessive Cu stress. At 25 mg/L Cu, the contents of total chlorophyll, chlorophyll-a and chlorophyll-b were 30% higher in ectomycorrhizal plants than those in non-mycorrhizal plants. O2 evolution and electron transport of PSI and PSII were restrained by elevated Cu stress. However, no significant improvement was observed in reducing the physiological restraining in ectomycorrhizal seedlings over the non-mycorrhizal ones.</AbstractText>
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Influences of excessive Cu on photosynthesis and growth in ectomycorrhizal Pinus sylvestris seedlings.

Influences of excessive Cu on photosynthesis and growth in ectomycorrhizal Pinus sylvestris seedlings.

Source :

English descriptors

Abstract

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki