Título

Effects of ammonium nitrate, cesium chloride and tetraethylammonium on high-affinity potassium uptake in habanero pepper plantlets (Capsicum chinense Jacq.)

Autor

JOSE RAMON PACHECO ARJONA

NANCY RUIZ LAU

MARIA DE FATIMA MEDINA LARA

YERENI MINERO GARCÍA

ILEANA DE LA CARIDAD ECHEVARRIA MACHADO

CESAR DE LOS SANTOS BRIONES

MANUEL MARTINEZ ESTEVEZ

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Materias

 AMMONIUM - (AUTORES) CHANNEL BLOCKERS - (AUTORES) HIGH AFFINITY TRANSPORTERS - (AUTORES) POTASSIUM - (AUTORES) BIOLOGÍA Y QUÍMICA - (CTI)

Resumen o descripción

Potassium (K +) is an essential nutrient and the most abundant cation in plant cells. Plants have a wide variety of transport systems for K + acquisition that catalyze K + uptake across a wide spectrum ofexternal K + concentrations and mediate K + movement within the plant, as well as its release into the environment. The KUP/HAK/KT transporter family plays a key role in K + homeostasis in plant cells. The present study demonstrates that habanero pepper plantlets have a clear pattern of K + uptake when resupplemented with K + after K + starvation. Habanero pepper plantlets, re-supplemented with a solution containing low concentrations of K + after 72, 96 or 120 h of K + starvation were able to decrease the amount of K + in the solution at different time points. To study the effect of NH 4 +, we added different concentrations of NH4NO3 to the medium solution and demonstrated that NH 4 + inhibited K + uptake in a dose-dependent manner. When the plantlets were subjected to K +starvation for 72 h and then resupplemented with 50 or 100 μM K +, exposure to K + channel blockers (10 mM CsCl and 20 mM TEA) decreased their K + uptake compared with the control treatment. A model demonstrating the process of K + uptake through an NH 4 +-insensitive component was proposed.

Fecha de publicación

2011

Tipo de publicación

Artículo

Versión de la publicación

Versión publicada

Recurso de información

http://cicy.repositorioinstitucional.mx/jspui/handle/1003/759

Formato

application/pdf

Fuente

African Journal of Biotechnology, 10(62), 13418-13429, 2011

Idioma

Inglés

Relación

&

Martínez-Estévez, M. (2011). Effects of ammonium nitrate, cesium chloride and tetraethylammonium on high-affinity potassium uptake in habanero pepper plantlets (capsicum chinense jacq.).African Journal of Biotechnology, 10(62), 13418-13429.

Sugerencia de citación

Pacheco-Arjona, J. R., Ruiz-Lau, N., Medina-Lara, F., Minero-García, Y., Echevarría-Machado, I., de los Santos-Briones, C.,

Repositorio Orígen

Repositorio Institucional CICY

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