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Tissue culture propagation alters plant-microbe interactions in tobacco rhizosphere

Tilston, E. L., Halpin, C. and Hopkins, D. W. (2008) Tissue culture propagation alters plant-microbe interactions in tobacco rhizosphere. Biology and Fertility of Soils, 44 (6). pp. 897-901. ISSN 0178-2762

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To link to this item DOI: 10.1007/s00374-008-0268-4

Abstract/Summary

We have compared properties of roots from different lines (genotypes) of tobacco raised either in tissue culture or grown from seed. The different lines included unmodified plants and plants modified to express reduced activity of the enzyme cinnamoyl-CoA reductase, which has a pivotal role in lignin biosynthesis. The size and structure of the rhizosphere microbial community, characterized by adenosine triphosphate and phospholipid fatty acid analyses, were related to root chemistry (specifically the soluble carbohydrate concentration) and decomposition rate of the roots. The root material from unmodified plants decomposed faster following tissue culture compared with seed culture, and the faster decomposing material had significantly higher soluble carbohydrate concentrations. These observations are linked to the larger microbial biomass and greater diversity of the rhizosphere communities of tissue culture propagated plants.

Item Type:Article
Divisions:Faculty of Science > School of Archaeology, Geography and Environmental Science
Interdisciplinary centres and themes > Soil Research Centre
ID Code:4149
Uncontrolled Keywords:genetic modification in vitro propagation lignin Nicotiana tabacum (tobacco) rhizosphere microbial community soluble carbohydrates EX-VITRO ACCLIMATIZATION GENETIC MODIFICATIONS IN-VITRO LIGNIN BIOSYNTHESIS SOIL BIOMASS ACID PHOTOSYNTHESIS DECOMPOSITION GROWTH
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