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Silva LR, Moura APC, Gil BV, Rohr A, Almeida SMZ, Donazzolo J, Perboni AT, Oliveira FLR, Sant'Anna-Santos BF, Galon L, Danner MA. Morphophysiological changes of Acca sellowiana (Myrtaceae: Myrtoideae) saplings under shade gradient. BRAZ J BIOL 2022; 84:e252364. [PMID: 35019092 DOI: 10.1590/1519-6984.252364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 10/06/2021] [Indexed: 11/21/2022] Open
Abstract
Understanding morphological and physiological changes under different light conditions in native fruit species in juveniles' stage is important, as it indicate the appropriate environment to achieve vigorous saplings. We aimed to verify growth and morphophysiological changes under shade gradient in feijoa (Acca sellowiana (O. Berg) Burret) to achieve good quality saplings adequate to improve cultivation in orchards. The saplings were grown for twenty-one-month under four shading treatments (0%, 30%, 50%, and 80%). Growth, photosynthetic pigments, gas exchanges, chlorophyll fluorescence, and leaf anatomy parameters were evaluated. Saplings under full sun and 30% shade had higher height and diameter growth and dry mass accumulation due to higher photosynthesis rate. As main acclimatization mechanisms in feijoa saplings under 80% shade were developed larger leaf area, reduced leaf blade thickness, and enhanced quantum yield of photosystem II. Even so, the net CO2 assimilation and the electron transport rate was lower and, consequently, there was a restriction on the growth and dry mass in saplings under deep shade. Therefore, to obtain higher quality feijoa saplings, we recommend that it be carried out in full sun or up to 30% shade, to maximize the sapling vigor in nurseries and, later, this light environment can also be used in orchards for favor growth and fruit production.
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Affiliation(s)
- L R Silva
- Universidade Tecnológica Federal do Paraná - UTFPR, Câmpus Pato Branco, Programa de Pós-Graduação em Agronomia, Pato Branco, Paraná, Brasil
| | - A P C Moura
- Universidade Tecnológica Federal do Paraná - UTFPR, Câmpus Pato Branco, Programa de Pós-Graduação em Agronomia, Pato Branco, Paraná, Brasil
| | - B V Gil
- Universidade Tecnológica Federal do Paraná - UTFPR, Câmpus Pato Branco, Programa de Pós-Graduação em Agronomia, Pato Branco, Paraná, Brasil
| | - A Rohr
- Universidade Tecnológica Federal do Paraná - UTFPR, Câmpus Pato Branco, Programa de Pós-Graduação em Agronomia, Pato Branco, Paraná, Brasil
| | - S M Z Almeida
- Universidade Tecnológica Federal do Paraná - UTFPR, Câmpus Pato Branco, Programa de Pós-Graduação em Agronomia, Pato Branco, Paraná, Brasil
| | - J Donazzolo
- Universidade Tecnológica Federal do Paraná - UTFPR, Câmpus Dois Vizinhos, Programa de Pós-Graduação em Agroecossistemas, Dois Vizinhos, Paraná, Brasil
| | - A T Perboni
- Universidade Tecnológica Federal do Paraná - UTFPR, Câmpus Dois Vizinhos, Programa de Pós-Graduação em Agroecossistemas, Dois Vizinhos, Paraná, Brasil
| | - F L R Oliveira
- Universidade Federal do Paraná - UFPR, Departamento de Botânica, Curitiba, Paraná, Brasil
| | - B F Sant'Anna-Santos
- Universidade Federal do Paraná - UFPR, Departamento de Botânica, Curitiba, Paraná, Brasil
| | - L Galon
- Universidade Federal da Fronteira Sul - UFFS, Câmpus Erechim, Programa de Pós-Graduação em Ciência e Tecnologia Ambiental, Erechim, Rio Grande do Sul, Brasil
| | - M A Danner
- Universidade Tecnológica Federal do Paraná - UTFPR, Câmpus Pato Branco, Programa de Pós-Graduação em Agronomia, Pato Branco, Paraná, Brasil
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