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Photochemical efficiency of adult and young leaves of the neotropical understory shrub Psychotria limonensis (Rubiaceae) in response to changes in the light environment

 

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書誌詳細
著者: Avalos, Gerardo, Mulkey, Stephen S
フォーマット: artículo original
状態:Versión publicada
出版日付:2004
その他の書誌記述: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
国:Portal de Revistas UCR
機関:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
言語:Inglés
OAI Identifier:oai:portal.ucr.ac.cr:article/15498
オンライン・アクセス:https://revistas.ucr.ac.cr/index.php/rbt/article/view/15498
キーワード:chlorophyll fluorescence
photoinhibition
photosynthesis
psychotria limonensis
tropical forest
Panama
fluorescencia
clorofila
fotoinhibicion
fotosintesis
bosque tropical