Physiological and biochemical aspects of tomato seedlings treated with prohexadione-calcium

• Autor(a) principal: Fabrício Palla Teixeira
• Data de Publicação: 2021
• Outros Autores: Andrew Kim Lopes Ferraz, Rafaelly Calsavara Martins, Tainá Mamede Cirne Silva, João Domingos Rodrigues, Elizabeth Orika Ono
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFMG
• Texto Completo: https://doi.org/10.5039/agraria.v16i2a8652; http://hdl.handle.net/1843/54934; https://orcid.org/0000-0002-8956-5256; https://orcid.org/0000-0002-4683-5543; https://orcid.org/0000-0002-6179-5404; https://orcid.org/0000-0003-4364-3981; https://orcid.org/0000-0003-4947-0997; https://orcid.org/0000-0001-7965-4696
• topic: Antioxidant enzymes; Fluorescence; Growth; Solanum lycopersicum L.; Botânica; Tomate - Cultivo; Plantas - Análise

The objective of this experiment was to study the effects of different concentrations of the plant growth regulators prohexadione-calcium (ProCa) on the growth control of tomato seedlings. The experiment was conducted in the forest seedling nursery of the Faculty of Agronomic Sciences - UNESP, Botucatu Campus-SP. The experimental design was completely randomized, composed of five treatments: 0, 50, 100, 200 and 400 mg of the active ingredient (a.i.) of ProCa, with 4 replicates of 30 seedlings. Treatments were applied with a manual CO2 sprayer when seedlings completed 20 days after sowing. Ten days after applying the treatments, seedling growth analysis, SPAD index, gas exchange, chlorophyll a fluorescence and biochemical analyses were all performed. From the results obtained, the conclusion was that ProCa concentrations inhibited seedling growth without compromising the photosynthetic apparatus.