Climate change and the ecophysiology of Bertholletia excelsa seedlings

The Bertholletia excelsa a species native to the Amazon region of great national and international interest, mainly for the nutritional benefits of its seeds. However, there is still no information on the ecophysiological responses of B. excelsa to climate change. Thus, the objective of this work wa...

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Bibliographic Details
Published in:Plant growth regulation 2022-09, Vol.98 (1), p.155-165
Main Authors: de Souza Lorenzoni-Paschoa, Luciana, Amaral, Genilda Canuto, Pezzopane, José Eduardo Macedo, Toledo, João Vitor, de Abreu, Karla Maria Pedra, Xavier, Talita Miranda Teixeira, Cuzzuol, Geraldo Rogério Faustini
Format: Article
Language:English
Subjects:
Agriculture
Bertholletia excelsa
Biomedical and Life Sciences
Carbon dioxide
Carbon dioxide concentration
Chlorophyll
Climate change
Climate effects
Dry matter
Ecophysiology
Electrolytes
Extravasation
Gas exchange
Indigenous species
Life Sciences
Original Paper
Plant Anatomy/Development
Plant Physiology
Plant Sciences
Seedlings
Seeds
Substrates
Water stress
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Summary:The Bertholletia excelsa a species native to the Amazon region of great national and international interest, mainly for the nutritional benefits of its seeds. However, there is still no information on the ecophysiological responses of B. excelsa to climate change. Thus, the objective of this work was to evaluate the effect of climate change on the ecophysiology of B. excelsa seedlings. To do so, B. excelsa seedlings were conducted, for 91 days, in three different climatic scenarios: current Amazon; RCP4.5 (current average temperature in the Amazon + 2.5 °C and 538 ppm of carbon dioxide concentration i.e. [CO 2 ]); and RCP8.5 (+ 4.5 °C and 936 ppm [CO 2 ]). In addition, two irrigation levels were applied within each climatic scenario: seedlings maintained at 90% (not stressed) and 40% (stressed) of the water holding capacity of the substrate. Gaseous exchanges, water status, extravasation of electrolytes, chlorophyll parameters and total dry mass were evaluated. The results showed that climate change increased not only gas exchange variables, but all the ecophysiological processes of B. excelsa seedlings, even when subjected to water stress. This result led to a higher total dry matter production, especially under the conditions of the RCP8.5 scenario.
ISSN:0167-6903
1573-5087
DOI:10.1007/s10725-022-00841-w