Endogenous indole-3-acetic acid during adventitious root formation inPopulus £canadensis Moench.

Doleželová, T.; Psota, Vratislav; Feiglová, Z.

doi:10.1007/bf02890620

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…This is seen in species as diverse as rose ( Rosa hybrida ; Vandersalm et al ., 1996), yew ( Taxus baccata ; Nandi et al ., 1996), poplar ( Populus spp. ; Dolezelova et al ., 1996), eucalyptus (Gupta & Mascarenhas, 1987; McComb, 1995), pine ( Pinus sylvestris ; Flygh et al ., 1993), Mussaenda erythrophylla (StHilaire et al ., 1996) and apple ( Malus sp. ; Noiton et al ., 1992; Vanderkrieken et al ., 1992; DeKlerk et al ., 1995; DeKlerk et al ., 1997; Jasik & DeKlerk, 1997), for example, where exogenous auxin induces new roots.…”

Section: Root Architecture: Regulation Of De Novo Root Formationmentioning

confidence: 99%

Genes and signalling in root development

2003

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Contents Introduction 11 Cellular origins of root meristems 12 Regulation of cell identity in the root 13 Hormonal signals in root development 14 The genetics of root pattern 19 Root architecture: regulation of de novo root formation 24 Conclusions 33 References 33 Summary The plant root plays a range of roles, such as in the acquisition of water and nutrients, the provision of structural support and as the site of interactions with mycorrhizae, nitrogen fixing organisms (in certain taxa) and diverse pests and pathogens. It also provides an important experimental system to study different aspects of plant organogenesis, including the regulation of pattern formation, cell division, intercellular signalling and cell differentiation. With the completion of the Arabidopsis sequencing programme, and the availability of very large collections of Arabidopsis mutants, it is feasible rapidly to gain new information on the control of each of these aspects of root development. Drawing principally from experimental work using this model organism, which has proved extremely amenable to genetic and physiological analysis, we aim to bring together recent advances in knowledge and understanding of the molecular basis of root organogenesis, from origins in embryogenesis to postgermination architecture.

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Section: Root Architecture: Regulation Of De Novo Root Formationmentioning

confidence: 99%

Genes and signalling in root development

2003

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“…Common examples are rose (Rosa hybrida) 48 , poplar (Populus spp.) 49 , eucalyptus 50 , pine (Pinus sylvestris) 51 , and apple (Malus sp.) 52 .…”

Section: Discussionmentioning

confidence: 99%

Ocimum kilimandscharicum 4CL11 negatively regulates root formation by inhibiting polar auxin transport via flavonoids accumulation

Lavhale

Kondhare

Sinthadurai

et al. 2023

Preprint

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4-Coumarate-CoA Ligase (4CL) is an important enzyme in the phenylpropanoid biosynthesis pathway. Multiple 4CLs are identified in Ocimum species; however, their function remains enigmatic. In this study, we independently overexpressed three Ok4CL isoforms from Ocimum kilimandscharicum (Ok4CL7, -11 and -15) in the plant species Nicotiana benthamiana, Solanum tuberosum and Arabidopsis thaliana for functional characterization. Interestingly, Ok4CL11 overexpression causes a rootless or reduced root growth phenotype, whereas overexpression of other two isoforms (Ok4CL7 and -15) resulted in normal adventitious root growth. Overexpression of Ok4CL11 in N. benthamiana leads to abundance of flavonoid-glycosides (i.e. kaempferol-3,7-O-bis-alpha-L-rhamnoside [K3,7R], quercetin-3-O-rutinoside [Q3R]), reduces auxin levels, and disrupts auxin transport and signaling, which cumulatively results in a rootless phenotype. In silico studies show that auxin transporters (PINs/LAXs) have higher binding affinity to K3,7R than to auxins, suggesting a potential disruption of auxin transport by the flavonoid-glycosides accumulated in Ok4CL11-OE lines. Our study reveals a unique indirect function of Ok4CL11 as a negative regulator of root growth, likely involving inhibition of auxin transport. As Ok4CL11 strongly affects root development, it is imperative to understand tissue-specific regulation of its gene expression and could be utilized for agricultural benefits.

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“…The response of cuttings to exogenous application of auxins is dependent on many internal and external factors. Both the concentration of the growth substance applied and, above all, the sensitivity of treated plant parts to this substance may be limiting factors (Dolezelova et al, 1996). Exogenously applied auxin is one of the external factors influencing the phytohormonal balance in the cuttings and thus adventitious root formation.…”

Section: Introductionmentioning

confidence: 99%

Proliferation and rooting of wild cherry: The influence of cytokinin and auxin types and their concentration

Mansseri-Lamrioui¹,

Louerguioui²,

Bonaly³

et al. 2011

Afr. J. Biotechnol.

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Determination of the most optimal type and concentration of plant growth regulators as medium constituents is one of the most important aspects of successful micro propagation, among other in vitro factors. With the aim of optimization of in vitro multiplication of wild cherry, the effect of the following cytokinins was studied: 6-benzyladenine (BAP), 2-isopentenyl adenine (2iP) and kinetin (Kin) at concentrations of 1, 2, 4 and 8 mg. l-1. Stem segments of seedlings from juvenile and adult materials were disinfected and grown on a Quoirin and Lepoivre (1977) (QL) medium without growth regulators for 4 weeks. Each material responded differently to the tested cytokinins. The use of 6-benzyladenine resulted in the highest percentage of sprouting, the development of shoots and the ratios of multiplication for two materials of Prunus avium L. In the next experiment, seedlings from the juvenile and adult materials were grown on (MS2/5) medium in the presence of auxins indole-3-butyric acid (IBA), naphtaleneacetic acid (NAA), indole-3-acetic acid (IAA), when compared with concentrations of 0.5, 1, 2, and 4 mg. l-1. For the type of explants and its reactivity with the type and the concentration of auxin, significant differences among explants for root induction were observed. The adult material did not develop roots in any of the auxin and concentration used. In the case of the juvenile material, the IBA was distinguished from the other auxins tested and the highest induction of roots took place in 1 mg. l-1. The most significant induction of cal characterizes, especially, the mediums containing the NAA followed by the IAA with concentrations of 2 and 4 mg. l-1 , respectively, which block the emergence of the roots partly and decreases the rate of rooting thereafter. The highest average number of roots and the highest average length of roots were obtained with the IBA with 1 mg. l-1 .

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Endogenous indole-3-acetic acid during adventitious root formation inPopulus £canadensis Moench.

Cited by 4 publications

References 6 publications

Genes and signalling in root development

Genes and signalling in root development

Ocimum kilimandscharicum 4CL11 negatively regulates root formation by inhibiting polar auxin transport via flavonoids accumulation

Proliferation and rooting of wild cherry: The influence of cytokinin and auxin types and their concentration

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