Deposition rates in growing tissue: Implications for physiology, molecular biology, and response to environmental variation
- Wendy K. SilkAffiliated withDepartment of Land, Air and Water Resources, University of California at Davis Email author
- , Marie-Béatrice Bogeat-TriboulotAffiliated withINRA, UMR1137 Ecologie et Ecophysiologie ForestièresUMR 1137, Ecologie et Ecophysiologie Forestières, Faculté des Sciences et Technologies, Université de Lorraine
Net rates of biosynthesis and mineral deposition are needed to understand the physiology and molecular biology of growth and plant responses to environmental variation. Many popular models ignore cell expansion and displacement. In contrast, the continuity equation, used with empirical data on growth velocity and concentration, allows computation of biosynthesis and deposition rates in growing tissue.
This article describes data and methods needed to calculate deposition rates and reviews some insights into environmental physiology and molecular biology.
Growth zones actively and strongly deposit mineral elements, even though local concentrations may not be changing in time. Deposition rate profiles give important insight into the mechanism of plant responses to drought and salinity, and they clarify many aspects of nitrogen metabolism in roots and leaves. This approach is also essential to understand molecular regulation of growth. A pioneering study determined transcript densities and calculated rates of change in gene expression; this study revealed how Actin 11 is highly regulated by a balance of transcription and decay during growth of roots. New technologies (in planta cytometry, coupled with powerful computational routines and real-time confocal microscopy) will allow determination of deposition rates in growing organs and advancement in understanding of gene regulation.
KeywordsGrowth Kinematics Continuity equation Deposition rates Plant-environment interactions Regulation of gene expression
- Deposition rates in growing tissue: Implications for physiology, molecular biology, and response to environmental variation
Plant and Soil
Volume 374, Issue 1-2 , pp 1-17
- Cover Date
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- Online ISSN
- Springer Netherlands
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- Continuity equation
- Deposition rates
- Plant-environment interactions
- Regulation of gene expression
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- Author Affiliations
- 1. Department of Land, Air and Water Resources, University of California at Davis, Davis, CA, 95616, USA
- 2. INRA, UMR1137 Ecologie et Ecophysiologie Forestières, 54280, Champenoux, France
- 3. UMR 1137, Ecologie et Ecophysiologie Forestières, Faculté des Sciences et Technologies, Université de Lorraine, 54500, Vandoeuvre-les-Nancy, France