On the role of calcium in indole-3-acetic acid movement and graviresponse in etiolated pea epicotyls

Migliaccio, Fernando; Galston, Arthur W.

doi:10.1007/bf00024664

Cited by 10 publications

(5 citation statements)

References 24 publications

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“…5) is consistent with the previously described insensitivity of net NAA uptake to changes in the effiux contribution that was discussed by Sabater and Rubery (1987b). Migliaccio and Galston (1989) found that both Ca z + and La 3 + stimulated auxin uptake into tap-water-grown pea epicotyl segments from weakly buffered media. They suggested a common external site of cation action, perhaps via calmodulin, which is present in pea plasma membrane (Collinge and Trewavas 1989) but apparently absent from pea cell walls (Dauwalder et al 1986).…”

Section: Amelioration Of Auxin Efjlux and Its Npa-sensitivity By Addimentioning

confidence: 99%

Calcium deficiency and auxin transport in Cucurbita pepo L. seedlings

Allan

Rubery

1991

Planta

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Hypocotyls of Cucurbita pepo L. (zucchini) seedlings grown at low calcium levels (0.1 mM) showed reduced basipetal polar transport of the auxins indole-3-acetic acid and 1-naphthylacetic acid in comparison with control plants grown at 5 mM Ca(2+). The contribution to overall transmembrane auxin transport of the symport uptake carrier was unchanged by calcium deficiency, but the efflux carrier of the auxin-anion uniport was less active and the sensitivity of auxin transport to N-1-naphthylphthalamic acid (NPA) inhibition was thereby reduced. These changes could partially be reversed by short treatments with Ca(2+) or La(3+). The NPA receptor was unaltered in level and affinity for NPA by calcium deficiency. It is suggested that the major lesion responsible for diminished polar auxin transport in calcium-deficient tissue is in flux through the auxin efflux carrier which could be subject to control by Ca(2+) by as yet unestablished mechanisms.

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Section: Amelioration Of Auxin Efjlux and Its Npa-sensitivity By Addimentioning

confidence: 99%

Calcium deficiency and auxin transport in Cucurbita pepo L. seedlings

Allan

Rubery

1991

Planta

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“…The latter is one of the main mechanisms by which instructive auxin gradients in tissues are formed to regulate plant development. Interestingly, polar auxin transport was found to be highly dependent on Ca 2+ availability [ 104 , 121 , 122 , 123 , 124 , 125 ]. Together, these findings highlight the importance of Ca 2+ in auxin transport.…”

Section: Ca 2+ Controls the Rate Of Auxin Transmentioning

confidence: 99%

Calcium: The Missing Link in Auxin Action

Vanneste

Friml

2013

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.

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“…Calcium is a necessary component for the gravitropic response of stems (Migliaccio & Galston 1989), coleoptiles (Goswami & Audus 1976) and roots (Lee, Mulkey & Evans 1983a), but its exact role is still obscure. Current models (e.g.…”

Section: Introductionmentioning

confidence: 99%

Is wall‐bound calcium redistributed during the gravireaction of stems and coleoptiles?

Bagshaw

Cleland

1993

Plant Cell & Environment

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We have tested the hypothesis that wall-bound calcium is redistributed from the lower to the upper sides of horizontal stems and coleoptiles during the reaction phase of gravicurvature. We used atomic absorption spectrometry to measure wall-bound calcium in the epidermal and internal layers of sunflower {Helianthus annuus L.) hypocotyls and pea (Pisum sativum L.) epicotyls, and total calcium in maize (Zea mays L.) coleoptiles at the time of maximal gravireaction. In every case, we found that there was no measurable redistribution of wall-bound calcium either from the lower to the upper sides, or between epidermal and inner tissues in response to the gravistimulus. These results indicate that a redistribution of wall-bound calcium does not play a role during the gravireaction of stems and coleoptiles.

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On the role of calcium in indole-3-acetic acid movement and graviresponse in etiolated pea epicotyls

Cited by 10 publications

References 24 publications

Calcium deficiency and auxin transport in Cucurbita pepo L. seedlings

Calcium deficiency and auxin transport in Cucurbita pepo L. seedlings

Calcium: The Missing Link in Auxin Action

Is wall‐bound calcium redistributed during the gravireaction of stems and coleoptiles?

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