Do vitamins affect the morphophysiology of lettuce in a hydroponic system?

Abstract

Technologies once applied exclusively in conventional systems have maximized gains in hydroponic systems; however, they still need information for proper use. Thus, the study aimed to evaluate the effect of foliar application of thiamine and niacin on growth and gas exchange activities in two lettuce cultivars in an ebb and flow hydroponic system. The completely randomized design (CRD) was used with four treatments and eight replications. The treatments were as follows: T1 - control, T2 - thiamine at a concentration of 200 mg L-1, T3 - niacin at 200 mg L-1, and T4 - thiamine and niacin combined at 100 mg L-1 of each vitamin. Each experimental plot consisted of a lettuce plant. The combined application of thiamine and niacin stood out, increasing the activity of gas exchange of lettuce plants and increasing by about 30% the fresh mass, concerning the control, for both cultivars, followed by the isolated application of niacin. For thiamine, the application alone did not result in significant changes. The vitamins affect the morphophysiology of lettuce, where the use of niacin has the potential for use in hydroponic production systems. Its combined use with thiamine increases this potential, with a synergistic effect between the compounds being verified.

Biostimulant potential of Azospirillum brasilense and nicotinamide for hydroponic pumpkin cultivation

“…When the products are applied together, the positive effects of the application of A. brasilense are added to the biostimulant action of the vitamin, which includes an increase in photosynthetic activity (Vendruscolo et al, 2023b), stomatal functionality (Ramos et al, 2023) and leaf pigment content (Elsayed et al, 2022), resulting in higher yield of species such as corn (Colla et al, 2021) and lettuce (Vendruscolo et al, 2023a). Also, the presence of nicotinamide stimulates root development (Figure 6C) since its application favors the expression of genes related to auxin production and, consequently, root development (Ahmad et al, 2021;Laurell et al, 2022).…”

“…Among these, nicotinamide has a close relationship with the photosynthetic capacity of plants, being a constituent part of NADH (Ferreira et al, 2023). In addition, when applied exogenously, it can result in significant gains in terms of increased gas exchange activity and vegetative growth in lettuce grown in a hydroponic system, for example (Vendruscolo et al, 2023a).…”

Management of Inoculation with Bradyrhizobium japonicum and Application of Vitamins for Hydroponic Soybean Cultivation

“…Hydroponic systems also enable the efficient use of a series of technologies to obtain production increases, such as biostimulant products such as vitamins [ 4 ] and bacteria [ 5 , 6 ]. In this sense, there is a migration of these technologies, used on a large scale under field conditions, to hydroponic cultivation.…”

“…As a complement to inoculation, among the various emerging technologies used to obtain better conditions for plant growth and production, B vitamins have been successfully applied both in field conditions [ 12 ] and in hydroponic cultivation [ 4 ]. Among these vitamins, thiamine (vitamin B1) acts as an enzymatic cofactor in glucose metabolic pathways, as a coenzyme in the decarboxylation-oxidation of pyruvate in the pentose phosphate and tricarboxylic cycle pathways (Krebs cycle) [ 13 , 14 ].…”

“…Generally, vitamins belonging to the B complex are constituent agents of coenzymes that act in catabolic reactions of macronutrients in the energy production process [ 14 ]. Some studies have shown positive effects on plant development, especially in conditions where stress is overcome, such as for rice [ 16 ], bean [ 17 ], and cucumber [ 18 ] crops, as well as in hydroponic systems, such as lettuce [ 4 ].…”