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

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Teixeira, Fabrício Palla [UNESP]
Ferraz, Andrew Kim Lopes [UNESP]
Martins, Rafaelly Calsavara [UNESP]
Silva, Tainá Mamede Cirne
Rodrigues, Joaõ Domingos [UNESP]
Ono, Elizabeth Orika [UNESP]

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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.



Antioxidant enzymes, Fluorescence, Growth, Solanum lycopersicum l

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Revista Brasileirade Ciencias Agrarias, v. 16, n. 2, 2021.