A sister of PIN1 gene in tomato (Solanum lycopersicum) defines leaf and flower organ initiation patterns by maintaining epidermal auxin flux

Developmental Biology
Ciera C MartinezNeelima R Sinha

Abstract

The spatiotemporal localization of the plant hormone auxin acts as a positional cue during early leaf and flower organogenesis. One of the main contributors to auxin localization is the auxin efflux carrier PIN-FORMED1 (PIN1). Phylogenetic analysis has revealed that PIN1 genes are split into two sister clades; PIN1 and the relatively uncharacterized Sister-Of-PIN1 (SoPIN1). In this paper we identify entire-2 as a loss-of-function SlSoPIN1a (Solyc10g078370) mutant in Solanum lycopersicum. The entire-2 plants are unable to specify proper leaf initiation leading to a frequent switch from the wild type spiral phyllotactic pattern to distichous and decussate patterns. Leaves in entire-2 are large and less complex and the leaflets display spatial deformities in lamina expansion, vascular development, and margin specification. During sympodial growth in entire-2 the specification of organ position and identity is greatly affected resulting in variable branching patterns on the main sympodial and inflorescence axes. To understand how SlSoPIN1a functions in establishing proper auxin maxima we used the auxin signaling reporter DR5: Venus to visualize differences in auxin localization between entire-2 and wild type. DR5: Venus visualizati...Continue Reading

References

Sep 18, 2016·Developmental Biology·Daniel H Chitwood, Vivian F Irish
Nov 9, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Ciera C MartinezNeelima R Sinha
Oct 25, 2017·ELife·Devin Lee O'ConnorOttoline Leyser
Aug 15, 2018·The New Phytologist·Phillip A ConklinMichael J Scanlon
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Jul 28, 2019·The Plant Journal : for Cell and Molecular Biology·Karel MüllerJan Petrášek
Jul 20, 2018·Frontiers in Plant Science·Lingjie WuJunhong Zhang
Jul 18, 2019·Plant Direct·Yi-Hsuan ChuEsther van der Knaap

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Related Concepts

Establishment and Maintenance of Localization
Positioning Attribute
Genes, Plant
Patterns
Specification of Organ Position
PIN1 gene
Plant Carpals
Anatomical Layer
Mutation, Nonsense
PDZD2

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