Arabidopsis lateral root development: an emerging story

Péret, Benjamin; Rybel, Bert De; Casimiro, Ilda; Benková, Eva; Swarup, Ranjan; Laplaze, Laurent; Beeckman, Tom; Bennett, Malcolm J.

doi:10.1016/j.tplants.2009.05.002

Cited by 716 publications

(580 citation statements)

References 104 publications

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“…In developmental terms, LRs differ from PRs because they originate postembryonically from parental roots (Osmont et al, 2007;Péret et al, 2009). The total number of LRs that is produced depends not only on genetic but also on environmental factors.…”

Section: The Effect Of Nutrient Availability On Lr Formationmentioning

confidence: 99%

“…Instead, it is more plausible that nutrient signals are integrated into developmental programs in order to induce changes in RSA. The formation of LRs is a complex and highly coordinated process that depends on the interplay of hormones, where auxin acts as a central component (Fukaki and Tasaka, 2009;Péret et al, 2009). In fact, nutrient supplies can strongly affect phytohormone gradients, as demonstrated by Fe triggering AUXIN INFLUX CARRIER1 (AUX1)-mediated auxin accumulation in LR tips and subsequent LR elongation (Giehl et al, 2012).…”

Section: The Effect Of Nutrient Availability On Lr Formationmentioning

confidence: 99%

“…The dynamic modulation of RSA is based on the intrinsic developmental nature of the different components of the root system. In fact, the primary root (PR) is established during embryogenesis, while the lateral roots (LRs) that originate from the PR develop postembryonically (Osmont et al, 2007;Péret et al, 2009). These highly dynamic changes in the overall RSA throughout time finally determine root plasticity and allow plants to efficiently adapt to environmental constraints.…”

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Plasticity of the Arabidopsis Root System under Nutrient Deficiencies

et al. 2013

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Section: The Effect Of Nutrient Availability On Lr Formationmentioning

confidence: 99%

Section: The Effect Of Nutrient Availability On Lr Formationmentioning

confidence: 99%

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Plasticity of the Arabidopsis Root System under Nutrient Deficiencies

et al. 2013

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“…These genes could have a function in the growth of the primordia that is about to start after 24 h of flooding and requires weakening of existing cell walls to allow for cell enlargement as well as synthesis of new wall material after cell division (Cosgrove, 2005). Also, like in the process of LR emergence, the cortex cells that cover the root primordia will need to separate from each other, and in Arabidopsis this has been shown to require wall modification (Péret et al, 2009). Although we did not detect up-regulation of CycB genes in the primordia at the 24-h time point, there is already a specific induction of many DNA replication-related genes, such as CDC6, a key regulator of DNA replication in eukaryotes (Castellano et al, 2001).…”

Section: Increased Cellular Activity Of Ar Primordia and Quiescence Omentioning

confidence: 99%

A Co-Opted Hormonal Cascade Activates Dormant Adventitious Root Primordia upon Flooding in Solanum dulcamara

et al. 2016

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“…Pairs of pericycle cells in several adjacent files undergo a series of asymmetric formative divisions (reviewed in ref. 6). These periclinal (parallel) and anticlinal (perpendicular) divisions give birth to a lateral root primordium (LRP) that will develop further into a lateral root comprising a new root meristem.…”

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Lateral root morphogenesis is dependent on the mechanical properties of the overlaying tissues

Lucas

Kenobi

Wangenheim

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

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In Arabidopsis, lateral root primordia (LRPs) originate from pericycle cells located deep within the parental root and have to emerge through endodermal, cortical, and epidermal tissues. These overlaying tissues place biomechanical constraints on the LRPs that are likely to impact their morphogenesis. This study probes the interplay between the patterns of cell division, organ shape, and overlaying tissues on LRP morphogenesis by exploiting recent advances in live plant cell imaging and image analysis. Our 3D/4D image analysis revealed that early stage LRPs exhibit tangential divisions that create a ring of cells corralling a population of rapidly dividing cells at its center. The patterns of division in the latter population of cells during LRP morphogenesis are not stereotypical. In contrast, statistical analysis demonstrated that the shape of new LRPs is highly conserved. We tested the relative importance of cell division pattern versus overlaying tissues on LRP morphogenesis using mutant and transgenic approaches. The double mutant aurora1 (aur1) aur2 disrupts the pattern of LRP cell divisions and impacts its growth dynamics, yet the new organ's dome shape remains normal. In contrast, manipulating the properties of overlaying tissues disrupted LRP morphogenesis. We conclude that the interaction with overlaying tissues, rather than the precise pattern of divisions, is most important for LRP morphogenesis and optimizes the process of lateral root emergence.lateral root development | plant morphogenesis | biomechanical regulation | statistical shape analysis | Arabidopsis thaliana I n contrast to animals, only the basic blueprint of the plant body plan is laid out during embryogenesis. Instead, the majority of plant organs are formed postembryonically. In some instances, organ formation can occur deep within another organ, as is the case for lateral roots (1, 2). In addition, plant cells are constrained by rigid walls; hence, cell migration cannot occur. Instead, plant morphogenesis relies on two mechanisms: oriented cell division and anisotropic growth (3, 4). For example, during embryogenesis, cells exhibit a highly synchronized program of expansion and division (5). How cell division, cell shape, and overlaying tissues interact during plant organ morphogenesis is currently unclear.Lateral roots are derived from cell division events deep within the primary root (1, 2). Pairs of pericycle cells in several adjacent files undergo a series of asymmetric formative divisions (reviewed in ref. 6). These periclinal (parallel) and anticlinal (perpendicular) divisions give birth to a lateral root primordium (LRP) that will develop further into a lateral root comprising a new root meristem. LRP formation in Arabidopsis was first described in a pioneering study 14 years ago (7) that proposed a seven-stage taxonomy of LRP development on the basis of 2D observations of cell layer numbers that still forms the basis of all studies describing LRP development in Arabidopsis.Recent advances in live biological imaging and image ...

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Arabidopsis lateral root development: an emerging story

Cited by 716 publications

References 104 publications

Plasticity of the Arabidopsis Root System under Nutrient Deficiencies

Plasticity of the Arabidopsis Root System under Nutrient Deficiencies

A Co-Opted Hormonal Cascade Activates Dormant Adventitious Root Primordia upon Flooding in Solanum dulcamara

Lateral root morphogenesis is dependent on the mechanical properties of the overlaying tissues

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