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Morphophysiological Changes in Genipa americana Seedlings in Response to Root Deformation and Substrate Attributes

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Abstract

The establishment of tree seedlings in the field, particularly in acidic soils, is commonly restricted by the excess or low availability of nutrients, or the quality of the root system. This study aimed to evaluate the effects of root deformation and substrate attributes on the growth, biomass allocation, and photosynthesis of G. americana seedlings. Plants were grown in pots containing three substrates (one sandy and fertile substrate enriched with organic matter and two acidic and low fertility substrates differing in texture) and two root conditions (without and with deformation). Growth, biomass allocation, leaf gas exchange, and chlorophyll fluorescence were evaluated. Substrates significantly affected growth, biomass allocation, and photosynthesis of G. americana seedlings. Root deformation affected only growth and biomass allocation. Interactive effects of substrate attributes and root deformation were observed for individual leaf area (ILA) and leaf area ratio (LAR). The increases in ILA and LAR of G. americana seedlings with root deformation and growing in substrates with low natural fertility may cause an imbalance in the absorption and loss of water by evapotranspiration, making the plants more susceptible to environmental stress after planting in the field.

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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. Natanielly Rodrigues Avelino (BOL0023/2018), Catriane Sousa Santos (BOL0130/2019), and Álvaro Alves de Almeida (4016/2020) acknowledge the Fundação de Amparo à Pesquisa do Estado da Bahia (FAPESB) for the scholarships. Roberta Barreto dos Santos (139646/2020) acknowledges Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), and Amanda Freitas Cerqueira acknowledges CAPES for their scholarships. Marcelo S. Mielke (305477/2018-8) and Ândrea C. Dalmolin (307604/2020-9) gratefully acknowledge CNPq for the fellowship award for scientific productivity.

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All authors contributed to the study conception and design. Catriane Sousa Santos and Marcelo Schramm Mielke conceived this study. Catriane Sousa Santos, Álvaro Alves de Almeida, Natanielly Rodrigues Avelino, and Roberta Barreto dos Santos collected the data. Catriane Sousa Santos analyzed the data with contritbutions from Amanda Freitas Cerqueira, Ândrea Carla Dalmolin, Martielly Santana dos Santos, and José Olímpio de Souza Júnior. Catriane Sousa Santos wrote the manuscript with all co-authors contributing to the fnal version.

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Correspondence to Catriane Sousa-Santos.

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The authors declare no competing interests.

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Sousa-Santos, C., Cerqueira, A.F., Dalmolin, Â.C. et al. Morphophysiological Changes in Genipa americana Seedlings in Response to Root Deformation and Substrate Attributes. J Soil Sci Plant Nutr 22, 2755–2764 (2022). https://doi.org/10.1007/s42729-022-00842-8

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  • DOI: https://doi.org/10.1007/s42729-022-00842-8

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