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Nutrient sensing and signalling in plants: Potassium and phosphorus

Amtmann, A., Hammond, J. P., Armengaud, P. and White, P. J. (2005) Nutrient sensing and signalling in plants: Potassium and phosphorus. Advances in Botanical Research, 43. pp. 209-257. ISSN 0065-2296

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To link to this item DOI: 10.1016/s0065-2296(05)43005-0

Abstract/Summary

Potassium and phosphorus are important macronutrients for crops but are often deficient in the field. Very little is known about how plants sense fluctuations in K and P and how information about K and P availability is integrated at the whole plant level into physiological and metabolic adaptations. This chapter reviews recent advances in discovering molecular responses of plants to K and P deficiency by microarray experiments. These studies provide us not only with a comprehensive picture of adaptive mechanisms, but also with a large number of transcriptional markers that can be used to identify upstream components of K and P signalling pathways. On the basis of the available information we discuss putative receptors and signals involved in the sensing and integration of K and P status both at the cellular and at the whole plant level. These involve membrane potential, voltage-dependent ion channels, intracellular Ca and pH, and transcription factors, as well as hormones and metabolites for systemic signalling. Genetic screens of reporter lines for transcriptional markers and metabolome analysis of K- and P-deficient plants are likely to further advance our knowledge in this area in the near future.

Item Type:Article
Refereed:Yes
Divisions:Interdisciplinary centres and themes > Centre for Food Security
Faculty of Life Sciences > School of Agriculture, Policy and Development > Biodiversity, Crops and Agroecosystems Division > Crops Research Group
ID Code:33839
Uncontrolled Keywords:Root system architecture phosphate starvation response vicia guard-cells Arabidopsis thaliana gene expression acid-phosphatase plasma-membrane barley roots k potassium uptake transcription factor
Publisher:Elsevier

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