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Título : Differential responses of root system and gas exchange in contrasting tomato genotypes under phosphorus starvation
Autor: Marques, Douglas José
Silva, Ernani Clarete da
Ferreira, Mozart Martins
Paglis, Carlos Mauricio
Souza, Thiago Correa de
Maluf, Wilson Roberto
Maciel, Gabriel Mascarenhas
Ferreira, Ewerton Dilelis
Lobato, Allan Klynger da Silva
Palavras-chave: Adubação fosfatada
Trocas gasosas
Tomate - Cultivo
Phosphate fertilization
Gas exchange
Tomatoes - Cultivation
Publicador: Informit
Data da publicação: Jan-2016
Referência: MARQUES, D. J. et al. Differential responses of root system and gas exchange in contrasting tomato genotypes under phosphorus starvation. Australian Journal of Crop Science, [S. l.], v. 10, n. 1, p. 101-110, Jan. 2016.
Abstract: Phosphorus (P) 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 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 contrasting tomato genotypes. The experimental design was a randomized block in the factorial scheme with three tomato genotypes (Globonnie, Tom-598 and F1) and four phosphorus levels (0.2, 30, 60 and 100 mg L-1) with four replications. Assessing the root morphology, it was observed that the Globonnie genotype has higher root length value in 0.2 mg L-1 of P; however, with the increasing of P levels it was greater in F1 genotype. This study concluded that Globonnie and F1 presented better performances under phosphorus starvation, due to better root characteristics and gas exchange that promote higher P efficiency. Besides, they may further uptake and improve the use of the phosphorus. Here, we revealed a possible reduction of phosphorus and consequently production costs in tomato farming.
Idioma: en_US
Aparece nas coleções:DAG - Artigos publicados em periódicos

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