Exogenous cytokinin promotes Epipremnum aureum L. growth through enhanced dry weight assimilation rather than through changes in partitioning
Aims: Benzylaminopurine (BAP) sprays have been shown to increase leaf size and leaf appearance rate, as well as biomass accumulation in pot-grown Epipremnum aureum L. BAP-mediated enhanced growth could either be the consequence of a higher investment of dry weight in leaf area development thus leadi...
| Autores principales: | , , |
|---|---|
| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
SCIENCEDOMAIN international
2018
|
| Materias: | |
| Acceso en línea: | http://www.sciencedomain.org/abstract/6625 http://hdl.handle.net/20.500.12123/3903 https://doi.org/10.9734/AJEA/2015/13398 |
| _version_ | 1855035225186238464 |
|---|---|
| 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 | Aims: Benzylaminopurine (BAP) sprays have been shown to increase leaf size and leaf appearance rate, as well as biomass accumulation in pot-grown Epipremnum aureum L. BAP-mediated enhanced growth could either be the consequence of a higher investment of dry weight in leaf area development thus leading to a positive dry weight accumulation feedback, to a promoting effect on dry weight assimilation per unit leaf area.
Study Design: A randomized complete block factorial design with three blocks was used.
Place and Duration of Study: Two experiments were carried out in a greenhouse at the Faculty of Agronomy, University of Buenos Aires, Argentina (34°28’S) from the 8th September 2007 and 5th September 2008, respectively, to the 12th March 2008 and 11th March 2009 respectively.
Methodology: We analyzed the effect of exogenous BAP supplied in different number of applications and at different concentrations under three light intensities, on dry weight accumulation and partitioning in E. aureum grown in pots, in two greenhouse experiments.
Results: A single 5mg L-1 BAP application was enough to increase the dry weight accumulation rate in comparison to untreated controls, irrespective of the light intensity. A strong direct relationship between the relative growth rate (RGR) and the net assimilation rate (NAR) were found, while an inverse relationship was observed between RGR and the leaf area ratio (LAR). Even though BAP increased dry weight partitioning to the aerial part, as revealed by shoot vs. root allometric analysis, this did not result in a LAR increase, but rather in higher stem dry weight accumulation, in association with a decrease in the leaf area partitioning coefficient (LAP). NAR promotion by BAP was associated with an increased N content per unit leaf area, rather than with changes in chlorophyll content.
Conclusion: Our results on the ornamental shade plant E. aureum also provide information which may help to increase productivity to this crop from a grower perspective. |
| format | info:ar-repo/semantics/artículo |
| id | INTA3903 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | SCIENCEDOMAIN international |
| publisherStr | SCIENCEDOMAIN international |
| record_format | dspace |
| spelling | INTA39032018-11-15T14:03:04Z Exogenous cytokinin promotes Epipremnum aureum L. growth through enhanced dry weight assimilation rather than through changes in partitioning Di Benedetto, Adalberto Galmarini, Claudio Romulo Tognetti, Jorge Epipremnum Sustancias de Crecimiento Vegetal Citoquininas Superficie Foliar Biomasa Plant Growth Substances Cytokinins Leaf Area Biomass Epipremnum aureum Aims: Benzylaminopurine (BAP) sprays have been shown to increase leaf size and leaf appearance rate, as well as biomass accumulation in pot-grown Epipremnum aureum L. BAP-mediated enhanced growth could either be the consequence of a higher investment of dry weight in leaf area development thus leading to a positive dry weight accumulation feedback, to a promoting effect on dry weight assimilation per unit leaf area. Study Design: A randomized complete block factorial design with three blocks was used. Place and Duration of Study: Two experiments were carried out in a greenhouse at the Faculty of Agronomy, University of Buenos Aires, Argentina (34°28’S) from the 8th September 2007 and 5th September 2008, respectively, to the 12th March 2008 and 11th March 2009 respectively. Methodology: We analyzed the effect of exogenous BAP supplied in different number of applications and at different concentrations under three light intensities, on dry weight accumulation and partitioning in E. aureum grown in pots, in two greenhouse experiments. Results: A single 5mg L-1 BAP application was enough to increase the dry weight accumulation rate in comparison to untreated controls, irrespective of the light intensity. A strong direct relationship between the relative growth rate (RGR) and the net assimilation rate (NAR) were found, while an inverse relationship was observed between RGR and the leaf area ratio (LAR). Even though BAP increased dry weight partitioning to the aerial part, as revealed by shoot vs. root allometric analysis, this did not result in a LAR increase, but rather in higher stem dry weight accumulation, in association with a decrease in the leaf area partitioning coefficient (LAP). NAR promotion by BAP was associated with an increased N content per unit leaf area, rather than with changes in chlorophyll content. Conclusion: Our results on the ornamental shade plant E. aureum also provide information which may help to increase productivity to this crop from a grower perspective. 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 2018-11-15T14:01:24Z 2018-11-15T14:01:24Z 2015 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://www.sciencedomain.org/abstract/6625 http://hdl.handle.net/20.500.12123/3903 2231-0606 https://doi.org/10.9734/AJEA/2015/13398 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 SCIENCEDOMAIN international American Journal of Experimental Agriculture 5 (5) : 419-434. (2015) |
| spellingShingle | Epipremnum Sustancias de Crecimiento Vegetal Citoquininas Superficie Foliar Biomasa Plant Growth Substances Cytokinins Leaf Area Biomass Epipremnum aureum Di Benedetto, Adalberto Galmarini, Claudio Romulo Tognetti, Jorge Exogenous cytokinin promotes Epipremnum aureum L. growth through enhanced dry weight assimilation rather than through changes in partitioning |
| title | Exogenous cytokinin promotes Epipremnum aureum L. growth through enhanced dry weight assimilation rather than through changes in partitioning |
| title_full | Exogenous cytokinin promotes Epipremnum aureum L. growth through enhanced dry weight assimilation rather than through changes in partitioning |
| title_fullStr | Exogenous cytokinin promotes Epipremnum aureum L. growth through enhanced dry weight assimilation rather than through changes in partitioning |
| title_full_unstemmed | Exogenous cytokinin promotes Epipremnum aureum L. growth through enhanced dry weight assimilation rather than through changes in partitioning |
| title_short | Exogenous cytokinin promotes Epipremnum aureum L. growth through enhanced dry weight assimilation rather than through changes in partitioning |
| title_sort | exogenous cytokinin promotes epipremnum aureum l growth through enhanced dry weight assimilation rather than through changes in partitioning |
| topic | Epipremnum Sustancias de Crecimiento Vegetal Citoquininas Superficie Foliar Biomasa Plant Growth Substances Cytokinins Leaf Area Biomass Epipremnum aureum |
| url | http://www.sciencedomain.org/abstract/6625 http://hdl.handle.net/20.500.12123/3903 https://doi.org/10.9734/AJEA/2015/13398 |
| work_keys_str_mv | AT dibenedettoadalberto exogenouscytokininpromotesepipremnumaureumlgrowththroughenhanceddryweightassimilationratherthanthroughchangesinpartitioning AT galmariniclaudioromulo exogenouscytokininpromotesepipremnumaureumlgrowththroughenhanceddryweightassimilationratherthanthroughchangesinpartitioning AT tognettijorge exogenouscytokininpromotesepipremnumaureumlgrowththroughenhanceddryweightassimilationratherthanthroughchangesinpartitioning |