A review of the effects of soil organisms on plant hormone signalling pathways

Plants perceive and respond to a profusion of environmental and endogenous signals that influence their growth and development. The G–protein signalling pathway is a mechanism for transducing extracellular signals that is highly conserved in a range of eukaryotes and prokaryotes. Evidence for the existence of G–protein signalling pathways in higher plants is reviewed, and their potential involvement in plant hormone signal transduction evaluated. A range of biochemical and molecular studies have identified potential components of G–protein signalling in plants, most notably a homologue of the G–protein coupled receptor superfamily ( GCR1 ) and the G α and G β subunits of heterotrimeric G–proteins. G–protein agonists and antagonists are known to influence a variety of signalling events in plants and have been used to implicate heterotrimeric G–proteins in gibberellin and possibly auxin signalling. Antisense suppression of GCR1 in Arabidopsis leads to a phenotype which supports a role for this receptor in cytokinin signalling. These observations suggest that higher plants have at least some of the components of G–protein signalling pathways and that these might be involved in the action of certain plant hormones.

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A role for G proteins in plant hormone signalling?

Plant Physiology and Biochemistry ◽

10.1016/s0981-9428(99)80045-x ◽

1999 ◽

Vol 37 (5) ◽

pp. 393-402 ◽

Cited By ~ 23

Author(s):

Richard Hooley

Keyword(s):

G Proteins ◽

Plant Hormone ◽

Hormone Signalling

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The cyclic nucleotide cGMP is involved in plant hormone signalling and alters phosphorylation of Arabidopsis thaliana root proteins

Journal of Experimental Botany ◽

10.1093/jxb/ers045 ◽

2012 ◽

Vol 63 (8) ◽

pp. 3199-3205 ◽

Cited By ~ 49

Author(s):

Jean Charles Isner ◽

Thomas Nühse ◽

Frans J. M. Maathuis

Keyword(s):

Arabidopsis Thaliana ◽

Cyclic Nucleotide ◽

Plant Hormone ◽

Hormone Signalling ◽

Root Proteins

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Function and biotechnological application of plant transcription factors and nature-originated compounds in plant hormone signalling

New Biotechnology ◽

10.1016/j.nbt.2015.10.034 ◽

2016 ◽

Vol 33 (3) ◽

pp. 426

Author(s):

Pablo Albertos ◽

Isabel Mateos ◽

Inmaculada Sánchez-Vicente ◽

Luis Sanz ◽

Tamara Lechón ◽

...

Keyword(s):

Transcription Factors ◽

Plant Hormone ◽

Biotechnological Application ◽

Hormone Signalling

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Comparison of plant hormone signalling systems

Essays in Biochemistry ◽

10.1042/bse0580165 ◽

2015 ◽

Vol 58 ◽

pp. 165-181 ◽

Cited By ~ 32

Author(s):

Antoine Larrieu ◽

Teva Vernoux

Keyword(s):

Small Molecules ◽

Plant Hormone ◽

Model Systems ◽

Regulatory Proteins ◽

Plant Growth And Development ◽

Soluble Receptors ◽

Membrane Bound ◽

Similarities And Differences ◽

Signalling Systems ◽

Hormone Signalling

Plant growth and development are controlled by nine structurally distinct small molecules termed phytohormones. Over the last 20 years, the molecular basis of their signal transduction, from receptors to transcription factors, has been dissected using mainly Arabidopsis thaliana and rice as model systems. Phytohormones can be broadly classified into two distinct groups on the basis of whether the subcellular localization of their receptors is in the cytoplasm or nucleus, and hence soluble, or membrane-bound, and hence insoluble. Soluble receptors, which control the responses to auxin, jasmonates, gibberellins, strigolactones and salicylic acid, signal either directly or indirectly via the destruction of regulatory proteins. Responses to abscisic acid are primarily mediated by soluble receptors that indirectly regulate the phosphorylation of targeted proteins. Insoluble receptors, which control the responses to cytokinins, brassinosteroids and ethylene, transduce their signal through protein phosphorylation. This chapter provides a comparison of the different components of these signalling systems, and discusses the similarities and differences between them.

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