Abstract
We conducted a study aiming to evaluate the effects of light intensity and root deformation on the prediction capacity of Genipa americana seedling biomass, using allometric models. Seedlings with and without root deformation were placed under high and low light intensity (21.6 and 0.66 mol m−2 day−1, respectively). Stem diameter (D), height (H), and leaves, stems, root, and total dry mass were measured. Analysis of covariance was used to test whether the relationship between seedling biomass and D2 or D2H varied for each treatment combination. Low light influenced the allometric relationship between biomass and D2 in stems. Root deformation with low light influenced the relationship between biomass and D2 in the root. Light and root deformation influenced the relationship between biomass and D2H in all seedling vegetative structures. As a result, “full” allometric models, which varied with treatment combinations, were equally accurate and precise at predicting biomass than “reduced” models, which did not vary with treatment for leaves and total dry mass using D2. However, “full” and “reduced” allometric models using D2H had the opposite effect as “full” models were more accurate and precise at predicting leaves and total biomass than “reduced” models. Our results showed that some allometric relationships of young G. americana plants were directly affected by root deformation and low light intensity, while some were conservative i.e. unaffected by light and root deformation treatments. The best allometric equations were obtained with models that used stem diameter as the predictor variable.
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Acknowledgements
This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES), Finance Code 001.Catriane Sousa Santos (BOL0130/2019) and Álvaro Alves de Almeida (4016/2020) acknowledges the Fundação de Amparo à Pesquisa do Estado da Bahia—(FAPESB) for the scholarships. Roberta Barreto dos Santos (139646/2020) would like to thank Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for the scholarship. The authors gratefully UFSB for funding for linguistic revision (process 23746.003400/2021/88 Edital PROPPG/UFSB Nº 08/2020). Marcelo S. Mielke (305477/2018-8) and Ândrea C. Dalmolin (307604/2020-9) gratefully acknowledges CNPq for the fellowship award for scientific productivity.
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Sousa-Santos, C., Cerqueira, A.F., Dalmolin, Â.C. et al. Root deformation affects the allometric relationships of young plants of Genipa americana under contrasting light conditions. New Forests 54, 525–541 (2023). https://doi.org/10.1007/s11056-022-09935-9
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DOI: https://doi.org/10.1007/s11056-022-09935-9