New insight into how thigmomorphogenesis affects Epipremnum aureum plant development
Climbing Epipremnum aureum plants develop larger leaves than unsupported, hanging plants. This effect may be regarded, in part, as a thigmomorphogenic response, but gravimorphogenetic effect may also be involved, since polar auxin transport is known to be negatively affected in plants with horizonta...
| Autores principales: | , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
2018
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| Materias: | |
| Acceso en línea: | http://cms.horticulturabrasileira.com.br/images/stories/36_3/20183638.pdf http://hdl.handle.net/20.500.12123/3777 http://dx.doi.org/10.1590/S0102-053620180308 |
| _version_ | 1855035201675067392 |
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| author | Di Benedetto, Adalberto Galmarini, Claudio Romulo Tognetti, Jorge |
| author_browse | Di Benedetto, Adalberto Galmarini, Claudio Romulo Tognetti, Jorge |
| author_facet | Di Benedetto, Adalberto Galmarini, Claudio Romulo Tognetti, Jorge |
| author_sort | Di Benedetto, Adalberto |
| collection | INTA Digital |
| description | Climbing Epipremnum aureum plants develop larger leaves than unsupported, hanging plants. This effect may be regarded, in part, as a thigmomorphogenic response, but gravimorphogenetic effect may also be involved, since polar auxin transport is known to be negatively affected in plants with horizontal or hanging stems, which may result in an altered hormone balance at the whole plant level.
The present work was aimed at studying how exogenous auxins and cytokinins may influence growth of E. aureum rooted cuttings
under different training systems. Rooted cuttings of E. aureum were cultivated either climbing on an upright wooden board or creeping
on the glasshouse bench or hanging from a basket. All leaves of each plant were sprayed to run-off at sunset with four indole-3-acetic acid (IAA) doses 7 days after transplanting and one week later, with four benzylaminopurine (BAP) concentrations, rendering 16 hormone combination treatments. The application of IAA or BAP at 50 mg L-1 to creeping and hanging plants significantly promoted growth but, in climbing plants, a negative effect was generally observed. Changes in net assimilation and photosynthetic rates, together with modified allometric coefficients, accounted for these responses. The higher growth promotion by exogenous growth regulators observed in creeping or hanging plants compared to climbing plants, may be interpreted mostly as a gravimorphogenetic response. |
| format | info:ar-repo/semantics/artículo |
| id | INTA3777 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA37772018-11-05T12:37:02Z New insight into how thigmomorphogenesis affects Epipremnum aureum plant development Di Benedetto, Adalberto Galmarini, Claudio Romulo Tognetti, Jorge Epipremnum Auxinas Etapas de Desarrollo de la Planta Fotosíntesis Citoquininas Gravitropismo Auxins Plant Developmental Stages Photosynthesis Cytokinins Gravitropism Epipremnum aureum Climbing Epipremnum aureum plants develop larger leaves than unsupported, hanging plants. This effect may be regarded, in part, as a thigmomorphogenic response, but gravimorphogenetic effect may also be involved, since polar auxin transport is known to be negatively affected in plants with horizontal or hanging stems, which may result in an altered hormone balance at the whole plant level. The present work was aimed at studying how exogenous auxins and cytokinins may influence growth of E. aureum rooted cuttings under different training systems. Rooted cuttings of E. aureum were cultivated either climbing on an upright wooden board or creeping on the glasshouse bench or hanging from a basket. All leaves of each plant were sprayed to run-off at sunset with four indole-3-acetic acid (IAA) doses 7 days after transplanting and one week later, with four benzylaminopurine (BAP) concentrations, rendering 16 hormone combination treatments. The application of IAA or BAP at 50 mg L-1 to creeping and hanging plants significantly promoted growth but, in climbing plants, a negative effect was generally observed. Changes in net assimilation and photosynthetic rates, together with modified allometric coefficients, accounted for these responses. The higher growth promotion by exogenous growth regulators observed in creeping or hanging plants compared to climbing plants, may be interpreted mostly as a gravimorphogenetic response. Plantas trepadeiras (Epipremnum aureum) conduzidas suspensas, desenvolvem folhas maiores em comparação com plantas conduzidas sem suporte (rasteiras). Esse efeito pode ser visto, em parte, como uma resposta thigmomorfogênica; mas o efeito gravimorfogênico também pode estar envolvido, uma vez que o transporte polar de auxinas é afetado negativamente em plantas com hastes horizontais ou pendentes, o que pode resultar em um balanço hormonal alterado, a nível da planta como um todo. O presente trabalho teve como objetivo estudar como as auxinas e citocininas exógenas podem influenciar o crescimento de estacas enraizadas de E. aureum sob diferentes sistemas de condução. Estacas enraizadas de E. aureum foram cultivadas como trepadeiras em uma tábua de madeira vertical ou rasteiras sobre bancada em casa de vegetação ou suspensas em uma cesta. Todas as folhas de cada planta foram pulverizadas até escoamento à tarde, com quatro doses de ácido indol-3-acético (AIA), 7 dias após o transplante e, após uma semana, com quatro concentrações de benzilaminopurina (BAP), resultando em 16 tratamentos combinados com hormônios. A aplicação de IAA ou BAP a 50 mg L-1 em plantas rasteiras e suspensas, promoveu crescimento significativo mas, em plantas trepadeiras, observou-se, em geral, efeito negativo. Mudanças na assimilação líquida e taxas fotossintéticas, juntamente com coeficientes alométricos modificados, foram responsáveis por essas respostas. A maior promoção do crescimento por reguladores de crescimento exógenos, observada em plantas rasteiras ou suspensas em comparação com plantas trepadeiras, pode ser interpretada principalmente como uma resposta gravimorfogênica EEA La Consulta Fil: Di Benedetto, Adalberto. Universidad de Buenos Aires. Facultad de Agronomía; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Galmarini, Claudio Romulo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria La Consulta; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias; Argentina Fil: Tognetti, Jorge. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Comisión de Investigaciones Científicas de la Provincia de Buenos Aires; Argentina 2018-11-05T12:31:38Z 2018-11-05T12:31:38Z 2018-09 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://cms.horticulturabrasileira.com.br/images/stories/36_3/20183638.pdf http://hdl.handle.net/20.500.12123/3777 0102-0536 1806-9991 http://dx.doi.org/10.1590/S0102-053620180308 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Horticultura Brasileira 36 : 330-340 (2018) |
| spellingShingle | Epipremnum Auxinas Etapas de Desarrollo de la Planta Fotosíntesis Citoquininas Gravitropismo Auxins Plant Developmental Stages Photosynthesis Cytokinins Gravitropism Epipremnum aureum Di Benedetto, Adalberto Galmarini, Claudio Romulo Tognetti, Jorge New insight into how thigmomorphogenesis affects Epipremnum aureum plant development |
| title | New insight into how thigmomorphogenesis affects Epipremnum aureum plant development |
| title_full | New insight into how thigmomorphogenesis affects Epipremnum aureum plant development |
| title_fullStr | New insight into how thigmomorphogenesis affects Epipremnum aureum plant development |
| title_full_unstemmed | New insight into how thigmomorphogenesis affects Epipremnum aureum plant development |
| title_short | New insight into how thigmomorphogenesis affects Epipremnum aureum plant development |
| title_sort | new insight into how thigmomorphogenesis affects epipremnum aureum plant development |
| topic | Epipremnum Auxinas Etapas de Desarrollo de la Planta Fotosíntesis Citoquininas Gravitropismo Auxins Plant Developmental Stages Photosynthesis Cytokinins Gravitropism Epipremnum aureum |
| url | http://cms.horticulturabrasileira.com.br/images/stories/36_3/20183638.pdf http://hdl.handle.net/20.500.12123/3777 http://dx.doi.org/10.1590/S0102-053620180308 |
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