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

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2021-01-01

Autores

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.

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Antioxidant enzymes, Fluorescence, Growth, Solanum lycopersicum l

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