Libération de protons par les plantes et acidification des sols
The plants take up from soil, the water and nutrients they need for their growth. In exchange, they excrete various mineral compounds and protons. Minerals being taken up as ions, this process implies a charge transfer (H+ or OH-) between the soil and the root. Root respiration exchanges O2 dissolved in the soil solution and excrete CO2 from the oxidation of the organic compounds as an energy source. At last, some plant species excrete large amount of organic anions. Thus, these processes alter physico-chemical conditions of the rhizosphere, its pH in particular, which are presented here.
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| Main Authors: | , , , |
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| Format: | conference_item biblioteca |
| Language: | fre |
| Published: |
INRA
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| Subjects: | P33 - Chimie et physique du sol, U30 - Méthodes de recherche, nutrition des plantes, échange d'ion, acidification, pH du sol, rhizosphère, mesure (activité), technique analytique, http://aims.fao.org/aos/agrovoc/c_16379, http://aims.fao.org/aos/agrovoc/c_3933, http://aims.fao.org/aos/agrovoc/c_90, http://aims.fao.org/aos/agrovoc/c_34901, http://aims.fao.org/aos/agrovoc/c_6569, http://aims.fao.org/aos/agrovoc/c_4668, http://aims.fao.org/aos/agrovoc/c_1513, |
| Online Access: | http://agritrop.cirad.fr/513263/ |
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| Summary: | The plants take up from soil, the water and nutrients they need for their growth. In exchange, they excrete various mineral compounds and protons. Minerals being taken up as ions, this process implies a charge transfer (H+ or OH-) between the soil and the root. Root respiration exchanges O2 dissolved in the soil solution and excrete CO2 from the oxidation of the organic compounds as an energy source. At last, some plant species excrete large amount of organic anions. Thus, these processes alter physico-chemical conditions of the rhizosphere, its pH in particular, which are presented here. |
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