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Cause-effect relationship among morphological adaptations, growth, and gas exchange response of pedunculate oak seedling to waterlogging / Fabienne Tatin-Froux in Annals of Forest Science, vol 71 n° 3 (April - May 2014)  

Public [article]  inAnnals of Forest Science > vol 71 n° 3 (April - May 2014) . - pp 363 - 369 Titre : Cause-effect relationship among morphological adaptations, growth, and gas exchange response of pedunculate oak seedling to waterlogging Type de document : Article/Communication Auteurs : Fabienne Tatin-Froux, Auteur ; Nicolas Capelli, Auteur ; Julien Parelle, Auteur Année de publication : 2014 Article en page(s) : pp 363 - 369 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes IGN] croissance des arbres [Termes IGN] dioxyde de carbone [Termes IGN] Quercus pedunculata [Termes IGN] ressources en eau [Termes IGN] système radiculaire Mots-clés libres : sol saturé en eau Résumé : (Auteur) - Context In response to waterlogging, pedunculate oak is known to develop adventitious roots and hypertrophied lenticels. However, to date, a link between these adaptations and the ability to maintain net CO2 assimilation rates and growth has not been demonstrated. - Aims The aim of this study was to explore the cause-effect relationship between the ability to form morphological adaptations (hypertrophied lenticels and adventitious roots) and the capacity to maintain high assimilation rate and growth. - Methods The occurrence of morphological adaptations and the parameters of photosynthesis were monitored over 20 days of waterlogging in 5-week-old pedunculate oak seedlings presenting similar morphological development. - Results Based on the development or not of morphological adaptations, the following three categories of responses were identified: development of hypertrophied lenticels and adventitious roots, development of hypertrophied lenticels alone, and the lack of development of adaptive structures. These categories, ranked in the order given, corresponded to decreasing levels of initial net CO2 assimilation rate growth and photosynthesis parameters observed during waterlogging. - Conclusion We observed a two-way cause-effect relationship between the capacity to form adaptive structures and the assimilation rate. Indeed, the initial assimilation rate determined the occurrence of hypertrophied lenticels and growth during stress, and then the development of morphological adaptations enhanced the ability to maintain assimilation levels during the stress. Numéro de notice : A2014-232 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1007/s13595-013-0340-6 Date de publication en ligne : 01/05/2014 En ligne : https://doi.org/10.1007/s13595-013-0340-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33135 [article]

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