Anais do XXXV Congresso Brasileiro de Ciência do Solo

CHARACTERIZATION OF TOMATO GENOTYPES UNDER DEFICIENCY OF PHOSPHORUS

DOUGLAS JOSÉ MARQUES⁽¹⁾; MOZART MARTINS FERREIRA⁽²⁾; MARIANA FERREIRA DIAS⁽³⁾; MARLON JOSÉ FIGUEIREDO PEREIRA JÚNIOR⁽³⁾; ELEN FAVARON⁽³⁾; FABIO AUGUSTO ISHIMOTO⁽³⁾;
1 - UNIVERSIDADE JOSÉ DO ROSÁRIO VELLANO-UNIFENAS; 2 - UFLA; 3 - UNIFENAS;

Phosphorus is an essential macronutrient for the development of plants. Although it is not always required in larger amounts, its presence is often limited, since the Brazilian soils and other soils of the world are generally poor in this element. The objective of the research was to evaluate the development of the root system, gas exchange and efficiency in the absorption of phosphorus in tomato genotypes. The experimental design was a randomized block in the factorial scheme 3 x 4 (three tomato genotypes by four doses of phosphorus) with four replications. The tomato genotypes: "Globonnie" PI 121665 (Efficient in phosphorus absorption, crt/crt); TOM-584 considered sensitive in phosphorus uptake (normal, crt+/crt+) and an F1RC1 PI 121665 X TOM -584 genotype, supposedly effective in phosphorus absorption. The phosphorus doses: 0.0, 0.2, 0.5, 30, 60 and 100 mg L-1. It was concluded that the genotypes PI 121665 and F1RC1 PI 121665 x TOM-584 showed distinct characteristics which are associated with the efficiency of phosphorus uptake.

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