Kinetics of phosphorus uptake and root morphology of local and improved varieties of maize
Interspecific and intraspecific differences in the efficiency of utilization of soil phosphorus (P) are explained, in part, by plant morphological and physiological variations, which characterize the plant for nutrient acquisition. As part of a study on maize genotypes characterization for P-uptake and use efficiency, kinetic parameters of P uptake and root morphological characters were evaluated for six local and improved maize varieties, grown in nutrient solution. The kinetic parameters related to P influx were: maximal transport rate (Vmax), the Michaelis-Menten constant (Km), and the external concentration when net uptake is zero (Cmin). Measured root morphological characters were: root length, radius, and surface area. Shoot and root dry matter yield and the P content in these parts were also determined. Diferences among varieties were observed in the kinetic parameters Vmax and Km, root length and in root/shoot dry matter ratio. Lower Km values were better indicatives of P uptake ability of the varietes and were significantly correlated to higher dry matter production and P-efficiency index.
Principais autores: | Machado,Cynthia Torres de Toledo, Furlani,Ângela Maria Cangiani |
---|---|
Formato: | Digital revista |
Idioma: | English |
Publicado em: |
Escola Superior de Agricultura "Luiz de Queiroz"
2004
|
Acesso em linha: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100012 |
Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
Registros relacionados
-
Root phosphatase activity, plant growth and phosphorus accumulation of maize genotypes
por: Machado,Cynthia Torres de Toledo, et al.
Publicado em: (2004) -
Root morphological traits related to phosphorus - uptake efficiency of soybean, sunflower, and maize
por: Fernández, Mariana Cecilia, et al. -
ROOT MORPHOLOGY AND NUTRIENT UPTAKE KINETICS BY AUSTRALIAN CEDAR CLONES
por: BATISTA,RAQUEL OLIVEIRA, et al.
Publicado em: (2016) -
Kinetics and translocation of phosphorus uptake in maize hybrids submitted to differents phosphorus levels.
por: ALVES, V. M. C., et al.
Publicado em: (2011-04-10T11:11:11Z) -
Biological and morphological traits of sugarcane roots in relation to phosphorus uptake
por: Arruda,Bruna, et al.
Publicado em: (2016)