Anatomical changes during adventitious root formation

Lovell, P. H.; White, Julie

doi:10.1007/978-94-009-4358-2_4

Cited by 71 publications

(69 citation statements)

References 60 publications

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“…Este comportamiento ha sido observado en otras especies tropicales (Hartmann et al, 1997;Mesén, 1998). El número de raíces producidos es altamente influenciado por la habilidad de la estaca de proveer carbohidratos, ya sea de reserva o producidos mediante fotosíntesis, al área donde surgen las raíces (Lovell & White, 1986;Moe & Andersen, 1988). En el enraizamiento de estacas juveniles de sacha inchi el número y longitud de raíces presentan una relación directamente proporcional con la dosis de ácido indolbutírico, obteniéndose el mayor número y mayor longitud de raíces al emplear 0.8% de ácido indolbutírico pero esta dosis de ácido indolbutírico presenta un porcentaje de mortalidad superior al resto de los tratamientos (Tabla 2).…”

Section: Resultados Y Discusión Efectos De Los Sustratos Y La Dosis Dunclassified

PROPAGACIÓN VEGETATIVA DEL SACHA INCHI (Plukenetia volubilis L.) MEDIANTE ENRAIZAMIENTO DE ESTACAS JUVENILES EN CÁMARAS DE SUBIRRIGACIÓN EN LA AMAZONIA PERUANA

Cachique¹,

Castillo²,

Ruíz-Solsol³

et al. 2011

Folia Amaz

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El presente trabajo se desarrolló con la finalidad de optimizar una metodología de propagación vegetativa de sacha inchi (Plukenetia volubilis L.) a través del enraizamiento de estacas juveniles en cámaras de subirrigación. El estudio se realizó en 2 ensayos consecutivos en el Instituto de Investigaciones de la Amazonía Peruana, IIAP-San Martín. En el primer ensayo se probaron 2 tipos de sustratos y 5 dosis de ácido indolbutírico para la inducción de enraizamiento y en el segundo ensayo se evaluó 3 longitudes de estacas y 4 áreas foliares. Se logró el enraizamiento de estacas juveniles de sacha inchi en cámaras de subirrigación empleando arena de textura media como sustrato con aplicación de 0.2% de ácido indolbutírico como inductor hormonal y el uso de estacas basales o intermedias de 8 cm de longitud con áreas foliares de 50 y 100 cm2. El enraizamiento de estacas juveniles nos permitirá disponer de plantones con uniformidad genética y contribuirá al aprovechamiento sostenible de genotipos seleccionados por su aptitud agroindustrial.

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Section: Resultados Y Discusión Efectos De Los Sustratos Y La Dosis Dunclassified

PROPAGACIÓN VEGETATIVA DEL SACHA INCHI (Plukenetia volubilis L.) MEDIANTE ENRAIZAMIENTO DE ESTACAS JUVENILES EN CÁMARAS DE SUBIRRIGACIÓN EN LA AMAZONIA PERUANA

Cachique¹,

Castillo²,

Ruíz-Solsol³

et al. 2011

Folia Amaz

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“…The effect of DDDKPtRR13 expression in delaying, but not abolishing, adventitious root development may also reflect selection of comparatively weak transgenic events that could be propagated. Alternatively, DDDKPtRR13 may completely disrupt one developmental pathway that is independent of alternative pathways, potentially involving diverse cell type precursors of adventitious roots (Lovel and White, 1986). If this hypothesis is correct, then this study has illuminated only one of several distinct pathways for adventitious root development.…”

Section: Stages Of Adventitious Root Developmentmentioning

confidence: 91%

“…In woody plants, adventitious root primordia primarily arise from ray cells adjacent to the vascular cambium, from buds or leaf gaps, or from callus formed at the base of cuttings (Lovel and White, 1986). Ectopic formation of roots is regulated by both endogenous (e.g.…”

mentioning

confidence: 99%

The Cytokinin Type-B Response Regulator PtRR13 Is a Negative Regulator of Adventitious Root Development inPopulus

et al. 2009

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Adventitious root formation at the base of plant cuttings is an innate de novo organogenesis process that allows massive vegetative propagation of many economically and ecologically important species. The early molecular events following shoot excision are not well understood. Using whole-genome microarrays, we detected significant transcriptome remodeling during 48 h following shoot removal in Populus tremula 3 Populus alba softwood cuttings in the absence of exogenous auxin, with 27% and 36% of the gene models showing differential abundance between 0 and 6 h and between 6 and 24 h, respectively. During these two time intervals, gene networks involved in protein turnover, protein phosphorylation, molecular transport, and translation were among the most significantly regulated. Transgenic lines expressing a constitutively active form of the Populus type-B cytokinin response regulator PtRR13 (DDDKPtRR13) have a delayed rooting phenotype and cause misregulation of CONTINUOUS VASCULAR RING1, a negative regulator of vascularization; PLEIOTROPIC DRUG RESISTANCE TRANS-PORTER9, an auxin efflux transporter; and two APETALA2/ETHYLENE RESPONSE FACTOR genes with sequence similarity to TINY. Inappropriate cytokinin action via DDDKPtRR13 expression appeared to disrupt adventitious root development 24 h after shoot excision, when root founder cells are hypothesized to be sensitive to the negative effects of cytokinin. Our results are consistent with PtRR13 acting downstream of cytokinin to repress adventitious root formation in intact plants, and that reduced cytokinin signaling after shoot excision enables coordinated expression of ethylene, auxin, and vascularization pathways leading to adventitious root development.

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“…In the de novo Adventitious Root Formation (ARF), a new area of meristematic tissue is formed among the parenchyma cells at the anti-clinal division in the phloem ray parenchyma. The formation of adventitious roots is an essential step in vegetative propagation (Lovell & White 1986). Adventitious roots can arise naturally from stem tissue under stressful environmental conditions, or may be induced by mechanical damage or following tissue culture regeneration of shoots (Li et al 2009).…”

Section: Introductionmentioning

confidence: 99%

De novo adventitious root formations in mini-cuttings of Azadirachta indica in response to different rooting media and auxin treatments

Gehlot¹,

Gupta²,

Arya³

et al. 2015

iForest

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Anatomical changes during adventitious root formation

Cited by 71 publications

References 60 publications

PROPAGACIÓN VEGETATIVA DEL SACHA INCHI (Plukenetia volubilis L.) MEDIANTE ENRAIZAMIENTO DE ESTACAS JUVENILES EN CÁMARAS DE SUBIRRIGACIÓN EN LA AMAZONIA PERUANA

PROPAGACIÓN VEGETATIVA DEL SACHA INCHI (Plukenetia volubilis L.) MEDIANTE ENRAIZAMIENTO DE ESTACAS JUVENILES EN CÁMARAS DE SUBIRRIGACIÓN EN LA AMAZONIA PERUANA

The Cytokinin Type-B Response Regulator PtRR13 Is a Negative Regulator of Adventitious Root Development inPopulus

De novo adventitious root formations in mini-cuttings of Azadirachta indica in response to different rooting media and auxin treatments

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