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http://biblioteca.incaper.es.gov.br/digital/handle/item/5369| Título: | Dose-Dependent Effects of the Protein Hydrolysate-Based Biostimulant Terrativa® on Growth, Photochemical Performance, and Quality of Theobroma cacao L. Seedlings. |
| Autor(es): | HOSTE, F. G.  BRANDAO, C. T. F. JEVEAUX-MACHADO, A. J. C. PIRES, J. S. B. MORO, F. ARAUJO, D. C. de BACHETI, B. M. SOUZA, M. E. L. de BALLA FILHO, D. OLIVEIRA, V. de S. SANTANA, E. N. de. KUHLCAMP, K. T. ARANTES, L. de O. DOUSSEAU-ARANTES, S. Fernando Gomes Hoste, UFES; Cristhiane Tatagiba Franco Brandão, FAESA; Ana Júlia Câmara Jeveaux-Machado, UFES; Janyne Soares Braga Pires, UFES; Felipe Moro, FAESA; Daniel Carvalho de Araújo, FAESA; Bliane Morozini Bacheti, FAESA; Maria Ester Lenzi de Souza, FAESA; Danilo Balla Filho, FAESA; Vinicius de Souza Oliveira, Incaper; Enilton Nascimento de Santana, Incaper; Karin Tesch Kuhlcamp, Incaper; Lucio de Oliveira Arantes, Incaper; Sara Dousseau Arantes, Incaper. |
| Data do documento: | 9-Jul-2026 |
| Editor: | International Journal of Plant Biology, v. 17, n. 6, 2026. |
| Descrição: | Protein hydrolysate-based biostimulants have been increasingly investigated due to their potential to improve seedling growth and physiological responses; however, integrated interpretations of dose-dependent morphophysiological and photochemical responses in Theobroma cacao L. during nursery production remain limited. This study evaluated the effects of increasing concentrations of Terrativa®, an organomineral biostimulant formulated with animal-derived protein hydrolysate, on growth, chlorophyll indices, and photosystem II performance in cacao seedlings of the Catongo and TSH1188 genotypes. The experiment was conducted in a randomized block design in a 2 × 6 factorial arrangement, corresponding to two genotypes and six Terrativa® concentrations (0, 1, 2, 3, 4, and 6 mL L−1). Most morphological and physiological variables exhibited quadratic responses. Intermediate concentrations promoted greater vegetative growth and improved photochemical responses, with maximum values observed for number of leaves (13.98 at 2.50 mL L−1), leaf area (994.10 cm2 at 2.91 mL L−1), stem length (42.79 cm at 3.44 mL L−1), root volume (9.21 cm3 at 3.70 mL L−1), and total chlorophyll (34.58 at 3.08 mL L−1). Catongo seedlings showed greater chlorophyll accumulation, whereas TSH1188 exhibited higher ABS/RC, TRO/RC, and PIabs values, indicating genotype-dependent differences in photochemical energy utilization. Higher concentrations were associated with reduced performance in several variables, suggesting lower physiological efficiency under elevated biostimulant doses. Overall, Terrativa® concentrations between 2.50 and 3.70 mL L−1 were the most effective for promoting balanced seedling development in both cacao genotypes, with Catongo responding more strongly in chlorophyll accumulation and TSH1188 showing greater photochemical responsiveness. |
| URI: | http://biblioteca.incaper.es.gov.br/digital/handle/item/5369 |
| Aparece nas coleções: | Memória Técnica do Incaper |
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|---|---|---|---|
| CACAU.pdf | 6,18 MB | Adobe PDF | Visualizar/Abrir |
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