Cause–effect relationship among morphological adaptations, growth, and gas exchange response of pedunculate oak seedlings to waterlogging

Autor: Nicolas Capelli, Julien Parelle, Fabienne Tatin-Froux
Přispěvatelé: Laboratoire Chrono-environnement ( LCE ), Université Bourgogne Franche-Comté ( UBFC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)
Rok vydání: 2014
Předmět:
Zdroj: Annals of Forest Science
Annals of Forest Science, Springer Verlag/EDP Sciences, 2014, 71 (3), pp.363-369. 〈10.1007/s13595-013-0340-6〉
Annals of Forest Science, Springer Nature (since 2011)/EDP Science (until 2010), 2014, 71 (3), pp.363-369. ⟨10.1007/s13595-013-0340-6⟩
Annals of Forest Science 3 (71), 363-369. (2014)
ISSN: 1297-966X
1286-4560
DOI: 10.1007/s13595-013-0340-6
Popis: International audience; & Context In response to waterlogging, pedunculate oak is known to develop adventitious roots and hypertrophied lenti-cels. However, to date, a link between these adaptations and the ability to maintain net CO 2 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 adap-tations (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 adven-titious roots, development of hypertrophied lenticels alone, and the lack of development of adaptive structures. These categories, ranked in the order given, corresponded to decreas-ing levels of initial net CO 2 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 assim-ilation rate. Indeed, the initial assimilation rate determined the occurrence of hypertrophied lenticels and growth during stress, and then the development of morphological adaptations en-hanced the ability to maintain assimilation levels during the stress.
Databáze: OpenAIRE
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