Photochemical efficiency of adult and young leaves of the neotropical understory shrub Psychotria limonensis (Rubiaceae) in response to changes in the light environment
Photochemical efficiency of adult and young leaves of the neotropical understory shrub Psychotria limonensis (Rubiaceae) in response to changes in the light environment
| dc.creator | Avalos, Gerardo | |
| dc.creator | Mulkey, Stephen S | |
| dc.date | 2004-12-01 | |
| dc.date.accessioned | 2023-08-03T17:51:37Z | |
| dc.date.available | 2023-08-03T17:51:37Z | |
| dc.identifier | https://revistas.ucr.ac.cr/index.php/rbt/article/view/15498 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7897289 | |
| dc.description | We explored the short-term adjustment in photochemical efficiency (Fv/Fm) in adult and young leaves of the understory neotropical shrub Psychotria limonensis Krause (Rubiaceae) in response to rapid changes in the light environment. Leaves were collected from 20 individual plants growing under sun and shade conditions on Gigante Peninsula, Barro Colorado Natural Monument (Republic of Panama), during the wet season of 1996. Leaves were distributed in four sequences of light treatments (AB leaves were expanded under sun and were transferred to shade, BA leaves experienced the opposite transfer, and the controls AA and BB leaves that were expanded and maintained under sun or shade conditions). Adult and young leaves did not differ in overall photochemical efficiency. Instead, differences were found among light environments, for which leaves transferred from shade to sun showed the lowest Fv/Fm ratios. There was no relationship between photochemical efficiency and leaf temperature. In P. limonensis, understory plants are susceptible of photoinhibition independently of the leaf ontogenetic stage. The approach utilized in this experiment allowed the rapid exploration of this capacity, and could be applied to poorly studied understory species | en-US |
| dc.description | Se exploró el ajuste a corto plazo en la eficiencia fotosintética (Fv/Fm) en hojas jovenes y adultas del arbusto del sotobosque neotropical Psychotria limonensis Krause (Rubiaceae) en respuesta a cambios rápidos de luz ambiental. Las hojas fueron recolectadas de 20 plantas individuales bajo condiciones de sol y sombra en Peninsula Gigante, Monumento Natural Barro Colorado (Panamá),durante la estación lluviosa de 1996. Las hojas fueron distribuidas en una secuencia cuatro tratamientos de luz (AB las hojas fueron expandidas bajo el sol y fueron transferidas a la sombra, BA las hojas experimentaron la transferencia contraria, y las hojas controles AA y BB que fueron expandidas y mantenidas bajo condiciones de sol o de sombra). Las hojas adultas o jóvenes no difieren en la eficiencia fotoquímica general. Por el contrario, se encontró diferencias entre los ambientes de luz (iluminados), para los cuales las hojas transferidas de la sombra al sol mostraron las menores tasas Fv/Fm. No hubo relación entre la eficiencia fotoquímica y la temperatura de las hojas. En P. limonensis, las plantas son suceptibles a la foto - inhibición independientemente del estado ontogenético de la hoja. El enfoque utilizado en este experimento permitió la rápida exploración de esta capacidad y demostró que puede ser utilizado en otras especies poco estudiadas del sotobosque. | es-ES |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Universidad de Costa Rica | en-US |
| dc.relation | https://revistas.ucr.ac.cr/index.php/rbt/article/view/15498/14865 | |
| dc.rights | Derechos de autor 2004 Revista de Biología Tropical | es-ES |
| dc.rights | http://creativecommons.org/licenses/by/4.0 | es-ES |
| dc.source | Revista de Biología Tropical; Vol. 52 No. 4 (2004): Volume 52 - Regular number 4 - December 2004; 839–844 | en-US |
| dc.source | Revista de Biología Tropical; Vol. 52 Núm. 4 (2004): Volumen 52 - Número regular 4 - Diciembre 2004; 839–844 | es-ES |
| dc.source | Revista Biología Tropical; Vol. 52 N.º 4 (2004): Volumen 52 - Número regular 4 - Diciembre 2004; 839–844 | pt-PT |
| dc.source | 2215-2075 | |
| dc.source | 0034-7744 | |
| dc.source | 10.15517/rbt.v1i1 | |
| dc.subject | chlorophyll fluorescence | en-US |
| dc.subject | photoinhibition | en-US |
| dc.subject | photosynthesis | en-US |
| dc.subject | psychotria limonensis | en-US |
| dc.subject | tropical forest | en-US |
| dc.subject | Panama | en-US |
| dc.subject | fluorescencia | es-ES |
| dc.subject | clorofila | es-ES |
| dc.subject | fotoinhibicion | es-ES |
| dc.subject | fotosintesis | es-ES |
| dc.subject | psychotria limonensis | es-ES |
| dc.subject | bosque tropical | es-ES |
| dc.subject | Panama | es-ES |
| dc.title | Photochemical efficiency of adult and young leaves of the neotropical understory shrub Psychotria limonensis (Rubiaceae) in response to changes in the light environment | en-US |
| dc.title | Photochemical efficiency of adult and young leaves of the neotropical understory shrub Psychotria limonensis (Rubiaceae) in response to changes in the light environment | es-ES |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | Article | en-US |