ABSTRACT The aim of the present study was to evaluate the effect of biostimulant containing amino acids and yeast extract on the physiological and reproductive characteristics of mango cv. Tommy Atkins during the shoot maturation phase in tropical semi-arid region. The experimental design consisted of randomized blocks with five treatments, five replications and five plants per plot. Treatments consisted of: T1) two foliar sprays with [biostimulant + KCl] + two foliar sprays with K2SO4; T2) No biostimulant and four foliar sprays with K2SO4; T3) three individual foliar sprays with biostimulant and one foliar spray with K2SO4; T4) two foliar sprays with biostimulant and two foliar sprays with K2SO4; and T5) two foliar sprays with [biostimulant + K2SO4] + one foliar spray with K2SO4. There is a positive effect of the biostimulant containing amino acids and yeast extract on transpiration, internal CO2 concentration, water-use efficiency and number of reproductive and non-differentiated shoots of mango cv. Tommy Atkins cultivated under tropical semi-arid condition, with attenuating effect on plant abiotic stress. For shoot maturation of mango cv. Tommy Atkins, three foliar sprays with biostimulant containing amino acids and yeast extract (10 mL per plant) and one with K2SO4 (3%), starting at 45 days after paclobutrazol application (T3), can be recommended.

The shoot maturation phase is important for growing mango tree because it precedes the floral induction, when plants are under stress caused by high temperatures and low water availability, that could be reduced by using plant biostimulant. Thus, the current study aimed to use a plant biostimulant containing yeast extract and amino acids to alleviate abiotic stress in mango plants, cv. Tommy Atkins, grown in semiarid environment. The experimental design consisted of randomized blocks with five treatments, five repetitions and five plants per plot. Treatments consisted of: T1) two foliar sprays with [biostimulant + KCl] + two foliar sprays with K2SO4; T2) No biostimulant and four foliar sprays with K2SO4; T3) three individual foliar sprays with biostimulant and one foliar spray with K2SO4; T4) two foliar sprays with biostimulant and two foliar sprays with K2SO4; and T5) two foliar sprays with [biostimulant + K2SO4] + one foliar spray with K2SO4. The variables evaluated were: i) leaf concentrations of soluble carbohydrates, starch, amino acids and proline; and ii) enzymatic activity of catalase and ascorbate peroxidase. The foliar spray with biostimulant during the branch maturation phase of mango trees grown in tropical semiarid environment alleviated plant abiotic stress. Three foliar biostimulant sprays and one K2SO4spray are recommended to alleviate mango plant abiotic stress in semiarid environment.

Initial development of watermelon in fuction of substrates and irrigation with saline waterDesenvolvimento inicial de melancieira em função de substratos e irrigação com água salina

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O interesse por produtos alimentícios saudáveis, nutritivos tem aumentado mundialmente, o que resulta em diversos estudos na área de produtos lácteos. , O objetivo do presente trabalho foi desenvolver uma formulação de sorvete a base de leite saborizado com polpa de romã 'Wonderful', bem como avaliar suas características físicoquímicas. O sorvete foi elaborado seguindo as etapas de: recepção, mistura de ingredientes, pasteurização, maturação, adição de sabor e congelamento. O produto final foi caracterizado quanto aos parâmetros de: pH, acidez titulável, sólidos totais, umidade, açúcares redutores, açúcares não redutores, açúcares totais, gordura, cinzas, vitamina C, zinco, magnésio, cobre chumbo, manganês e ferro. Os resultados mostraram que o sorvete encontra-se de acordo com a legislação brasileira vigente quanto ao teor de sólidos totais, apresenta alto valor mineral no que se refere ao zinco e magnésio, e elevado teor de açúcares. O sorvete apresenta-se como ideal para o consumidor que em sua alimentação possua restrição de gorduras. Não foram detectados teores de cobre, chumbo, manganês e ferro nas amostras. A pesquisa de produtos lácteos à base de frutos contribui para a diversificação no mercado, atendendo as necessidades dos consumidores, que buscam por novos sabores, uma alimentação saudável e alternativa.