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Interaction between Calcium and Actin in Guard Cell and Pollen Signaling Networks
Plants 2013, 2(4), 650-675; doi:10.3390/plants2040650

Calcium: The Missing Link in Auxin Action

1,*  and 1,2
1 Plant Systems Biology, VIB, and Plant Biotechnology and Bio-informatics, Ghent University, Ghent 9052, Belgium 2 Institute of Science and Technology Austria (IST Austria), Klosterneuburg 3400, Austria
* Author to whom correspondence should be addressed.
Received: 5 August 2013 / Revised: 7 October 2013 / Accepted: 10 October 2013 / Published: 21 October 2013
(This article belongs to the Special Issue Calcium Signaling in Plants)
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Due to their sessile lifestyles, plants need to deal with the limitations and stresses imposed by the changing environment. Plants cope with these by a remarkable developmental flexibility, which is embedded in their strategy to survive. Plants can adjust their size, shape and number of organs, bend according to gravity and light, and regenerate tissues that were damaged, utilizing a coordinating, intercellular signal, the plant hormone, auxin. Another versatile signal is the cation, Ca2+, which is a crucial second messenger for many rapid cellular processes during responses to a wide range of endogenous and environmental signals, such as hormones, light, drought stress and others. Auxin is a good candidate for one of these Ca2+-activating signals. However, the role of auxin-induced Ca2+ signaling is poorly understood. Here, we will provide an overview of possible developmental and physiological roles, as well as mechanisms underlying the interconnection of Ca2+ and auxin signaling.
Keywords: auxin; calcium; signal transduction; auxin transport auxin; calcium; signal transduction; auxin transport
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Vanneste, S.; Friml, J. Calcium: The Missing Link in Auxin Action. Plants 2013, 2, 650-675.

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