Sugar Metabolism and Photosynthesis of Tomatoes Irrigated with Water Treated with Low-Frequency Electromagnetic Resonance Fields in Different Fertigation Doses
Bianca Bueno Nogueira,
Eduardo Festozo Vicente,
Prínscilla Pâmela Nunes Chaves,
Willian Aparecido Leotti Zanetti,
Elizabeth Orika Ono,
Gustavo Ferreira da Silva,
André Rodrigues dos Reis,
Fernando Ferrari Putti
Affiliations
Bianca Bueno Nogueira
Department of Biosystems Engineering, School of Sciences and Engineering, São Paulo State University (UNESP), Tupã 17602-496, Brazil
Eduardo Festozo Vicente
Department of Biosystems Engineering, School of Sciences and Engineering, São Paulo State University (UNESP), Tupã 17602-496, Brazil
Prínscilla Pâmela Nunes Chaves
Department of Horticulture, School of Agriculture, São Paulo State University (UNESP), Botucatu 18610-034, Brazil
Willian Aparecido Leotti Zanetti
Department of Biosystems Engineering, School of Sciences and Engineering, São Paulo State University (UNESP), Tupã 17602-496, Brazil
Elizabeth Orika Ono
Department of Botany, Institute of Biosciences, São Paulo State University (UNESP), Botucatu 18618-000, Brazil
Gustavo Ferreira da Silva
Department of Botany, Institute of Biosciences, São Paulo State University (UNESP), Botucatu 18618-000, Brazil
André Rodrigues dos Reis
Department of Biosystems Engineering, School of Sciences and Engineering, São Paulo State University (UNESP), Tupã 17602-496, Brazil
Fernando Ferrari Putti
Department of Biosystems Engineering, School of Sciences and Engineering, São Paulo State University (UNESP), Tupã 17602-496, Brazil
Management of irrigation and fertilization in greenhouses, if not done correctly, can cause soil salinization. The use of water treated with very low-frequency electromagnetic resonance fields (WVLF) can reduce salinization effects on the photosynthetic and biometric systems. Thus, the purpose of the research to evaluate the metabolism of photosynthesis and the impact of WVLF on the cultivation of tomato crops subjected to different levels of fertigation. For this, the gas exchange parameters were evaluated, as well as chlorophyll a fluorescence, sugar contents, sucrose, chlorophylls, and phaeophytins and fruit production. The gas exchange parameters had greater activity when subjected to irrigation with electromagnetic water, consequently the production of sugar and sucrose increased. Photosynthetic System II showed less salinity effect, being favored by very low-frequency electromagnetic resonance fields. The production increased by 20% for the dose of 2.5 d·Sm−1 of WVLF reducing the effects caused by higher doses. Hence, the induction of water by electromagnetic fields can provide less damage to the photosynthetic system and to the cultivation of the tomato crop when subjected to saline stress and, consequently, favor the production of fruits by this crop under such conditions.
