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2013 ; 2
(4
): 650-75
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Calcium: The Missing Link in Auxin Action
#MMPMID27137397
Vanneste S
; Friml J
Plants (Basel)
2013[Oct]; 2
(4
): 650-75
PMID27137397
show ga
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, Ca(2+), 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 Ca(2+)-activating signals. However, the role
of auxin-induced Ca(2+) signaling is poorly understood. Here, we will provide an
overview of possible developmental and physiological roles, as well as mechanisms
underlying the interconnection of Ca(2+) and auxin signaling.
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