A Hormonal Regulatory Module That Provides Flexibility to Tropic Responses

Overview

Journal Plant Physiol

Specialty Physiology

Date 2011 May 6

PMID 21543725

Citations 13

Authors

Javier Gallego-Bartolome

Chitose Kami

Christian Fankhauser

David Alabadi

Miguel A Blazquez

Affiliations

Soon will be listed here.

Abstract

Plants orient their growth depending on directional stimuli such as light and gravity, in a process known as tropic response. Tropisms result from asymmetrical accumulation of auxin across the responding organ relative to the direction of the stimulus, which causes differential growth rates on both sides of the organ. Here, we show that gibberellins (GAs) attenuate the gravitropic reorientation of stimulated hypocotyls of dark-grown Arabidopsis (Arabidopsis thaliana) seedlings. We show that the modulation occurs through induction of the expression of the negative regulator of auxin signaling INDOLE-3-ACETIC ACID INDUCIBLE19/MASSUGU2. The biological significance of this regulatory mechanism involving GAs and auxin seems to be the maintenance of a high degree of flexibility in tropic responses. This notion is further supported by observations that GA-deficient seedlings showed a much lower variance in the response to gravity compared to wild-type seedlings and that the attenuation of gravitropism by GAs resulted in an increased phototropic response. This suggests that the interplay between auxin and GAs may be particularly important for plant orientation under competing tropic stimuli.

Citing Articles

Type-B response regulator OsRR22 forms a transcriptional activation complex with OsSLR1 to modulate OsHKT2;1 expression in rice.

Liu Y, Peng X, Ma A, Liu W, Liu B, Yun D Sci China Life Sci. 2023; 66(12):2922-2934.

PMID: 37924467 DOI: 10.1007/s11427-023-2464-2.

It's Time for a Change: The Role of Gibberellin in Root Meristem Development.

Shtin M, Dello Ioio R, Del Bianco M Front Plant Sci. 2022; 13:882517.

PMID: 35592570 PMC: 9112047. DOI: 10.3389/fpls.2022.882517.

Auxin methylation is required for differential growth in .

Abbas M, Hernandez-Garcia J, Pollmann S, Samodelov S, Kolb M, Friml J Proc Natl Acad Sci U S A. 2018; 115(26):6864-6869.

PMID: 29899148 PMC: 6042151. DOI: 10.1073/pnas.1806565115.

Gibberellin DELLA signaling targets the retromer complex to redirect protein trafficking to the plasma membrane.

Salanenka Y, Verstraeten I, Lofke C, Tabata K, Naramoto S, Glanc M Proc Natl Acad Sci U S A. 2018; 115(14):3716-3721.

PMID: 29463731 PMC: 5889667. DOI: 10.1073/pnas.1721760115.

Striking the Right Chord: Signaling Enigma during Root Gravitropism.

Singh M, Gupta A, Laxmi A Front Plant Sci. 2017; 8:1304.

PMID: 28798760 PMC: 5529344. DOI: 10.3389/fpls.2017.01304.

References

Iino M . Toward understanding the ecological functions of tropisms: interactions among and effects of light on tropisms. Curr Opin Plant Biol. 2005; 9(1):89-93. DOI: 10.1016/j.pbi.2005.11.012. View

Tatematsu K, Kumagai S, Muto H, Sato A, Watahiki M, Harper R . MASSUGU2 encodes Aux/IAA19, an auxin-regulated protein that functions together with the transcriptional activator NPH4/ARF7 to regulate differential growth responses of hypocotyl and formation of lateral roots in Arabidopsis thaliana. Plant Cell. 2004; 16(2):379-93. PMC: 341911. DOI: 10.1105/tpc.018630. View

Lloyd A, Schena M, Walbot V, Davis R . Epidermal cell fate determination in Arabidopsis: patterns defined by a steroid-inducible regulator. Science. 1994; 266(5184):436-9. DOI: 10.1126/science.7939683. View

Tsuchida-Mayama T, Sakai T, Hanada A, Uehara Y, Asami T, Yamaguchi S . Role of the phytochrome and cryptochrome signaling pathways in hypocotyl phototropism. Plant J. 2010; 62(4):653-62. DOI: 10.1111/j.1365-313X.2010.04180.x. View

Braendle C, Felix M . Plasticity and errors of a robust developmental system in different environments. Dev Cell. 2008; 15(5):714-24. DOI: 10.1016/j.devcel.2008.09.011. View

Djakovic-Petrovic T, de Wit M, Voesenek L, Pierik R . DELLA protein function in growth responses to canopy signals. Plant J. 2007; 51(1):117-26. DOI: 10.1111/j.1365-313X.2007.03122.x. View

Rashotte A, Brady S, Reed R, Ante S, Muday G . Basipetal auxin transport is required for gravitropism in roots of Arabidopsis. Plant Physiol. 2000; 122(2):481-90. PMC: 58885. DOI: 10.1104/pp.122.2.481. View

Zentella R, Zhang Z, Park M, Thomas S, Endo A, Murase K . Global analysis of della direct targets in early gibberellin signaling in Arabidopsis. Plant Cell. 2007; 19(10):3037-57. PMC: 2174696. DOI: 10.1105/tpc.107.054999. View

Boonsirichai K, Sedbrook J, Chen R, Gilroy S, Masson P . ALTERED RESPONSE TO GRAVITY is a peripheral membrane protein that modulates gravity-induced cytoplasmic alkalinization and lateral auxin transport in plant statocytes. Plant Cell. 2003; 15(11):2612-25. PMC: 280565. DOI: 10.1105/tpc.015560. View

10.

Friml J, Wisniewska J, Benkova E, Mendgen K, Palme K . Lateral relocation of auxin efflux regulator PIN3 mediates tropism in Arabidopsis. Nature. 2002; 415(6873):806-9. DOI: 10.1038/415806a. View

11.

Esmon C, Pedmale U, Liscum E . Plant tropisms: providing the power of movement to a sessile organism. Int J Dev Biol. 2005; 49(5-6):665-74. DOI: 10.1387/ijdb.052028ce. View

12.

de Lucas M, Daviere J, Rodriguez-Falcon M, Pontin M, Manuel Iglesias-Pedraz J, Lorrain S . A molecular framework for light and gibberellin control of cell elongation. Nature. 2008; 451(7177):480-4. DOI: 10.1038/nature06520. View

13.

Harper R, Luesse D, Muto H, Tatematsu K, Watahiki M, Yamamoto K . The NPH4 locus encodes the auxin response factor ARF7, a conditional regulator of differential growth in aerial Arabidopsis tissue. Plant Cell. 2000; 12(5):757-70. PMC: 139925. DOI: 10.1105/tpc.12.5.757. View

14.

Lariguet P, Fankhauser C . Hypocotyl growth orientation in blue light is determined by phytochrome A inhibition of gravitropism and phototropin promotion of phototropism. Plant J. 2004; 40(5):826-34. DOI: 10.1111/j.1365-313X.2004.02256.x. View

15.

Schwechheimer C . Understanding gibberellic acid signaling--are we there yet?. Curr Opin Plant Biol. 2007; 11(1):9-15. DOI: 10.1016/j.pbi.2007.10.011. View

16.

Hou X, Lee L, Xia K, Yan Y, Yu H . DELLAs modulate jasmonate signaling via competitive binding to JAZs. Dev Cell. 2010; 19(6):884-94. DOI: 10.1016/j.devcel.2010.10.024. View

17.

Peng J, Carol P, RICHARDS D, King K, Cowling R, Murphy G . The Arabidopsis GAI gene defines a signaling pathway that negatively regulates gibberellin responses. Genes Dev. 1998; 11(23):3194-205. PMC: 316750. DOI: 10.1101/gad.11.23.3194. View

18.

Li L, Xu J, Xu Z, Xue H . Brassinosteroids stimulate plant tropisms through modulation of polar auxin transport in Brassica and Arabidopsis. Plant Cell. 2005; 17(10):2738-53. PMC: 1242269. DOI: 10.1105/tpc.105.034397. View

19.

Kim T, Lee S, Joo S, Yun H, Lee Y, Kaufman P . Elongation and gravitropic responses of Arabidopsis roots are regulated by brassinolide and IAA. Plant Cell Environ. 2007; 30(6):679-89. DOI: 10.1111/j.1365-3040.2007.01659.x. View

20.

Clough S, Bent A . Floral dip: a simplified method for Agrobacterium-mediated transformation of Arabidopsis thaliana. Plant J. 1999; 16(6):735-43. DOI: 10.1046/j.1365-313x.1998.00343.x. View