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Characteristics
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Rhizosphere
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Phyllosphere
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Definition
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Soil around the root of plant where microbial activity is high is
called rhizosphere
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The surface of leaf inhabited by microbes is called phyllosphere
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Exudates
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Plant root secrete exudates that contains mainly organic matters
including carbogydrates, amino acids, vitamins etc
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Plant leaf secrete exudates that contains mainly amino acids,
glucose, fructose and sucrose.
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Microbe interaction
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The rhizospheric microbes establish interaction with root by
inhabiting in soil around root.
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The phyllospheric microbes establish interaction with leaf by
inhabiting on surface of leaf.
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Types of microbes
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They may be aerobic or anaerobic
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They are usually aerobic
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Effects on plants
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They promote plant growth by carrying out various biogeochemical
transformation in soil and hence increase amount of plant nutrient in soil.
They also produce plant growth hormone and protect plant against pathogens.
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They promote plant growth mainly by producing plant growth hormone
and protecting against pathogens. They usually do not play role is
biogeochemical transformation.
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Examples
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Rhizobium, Azotobacter,
Clostridium etc
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Beijerinckia, Pseudomonas,
Alterneria etc
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