Differential sensitivities of water diffusion in maize root cortex and stele to HgCl2-induced blockade of aquaporins |
| |
Authors: | I. F. Ionenko A. V. Anisimov |
| |
Affiliation: | (1) Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Center, Russian Academy of Sciences, ul. Lobachevskogo 2/31, Kazan, Tatarstan, 420111, Russia |
| |
Abstract: | Spin-echo NMR comparative study of water diffusion in the cortex and stele of maize (Zea mays L.) roots was made with the aim to determine predominant pathways of radial water movement in the root. The root parts examined differed in terms of water diffusion coefficients and sensitivity to HgCl2, the aquaporin blocker. These differences are discussed from the viewpoint of unequal contributions of separate transport pathways (apoplastic, symplastic, and transmembrane) to the overall water flow. Characteristics of water diffusion in roots with the endodermis damaged suggest an inconsiderable contribution of the endodermis into resistance to water movement. |
| |
Keywords: | Zea mays water diffusion cortex stele membrane permeability aquaporins water transport pathways spin echo NMR |
本文献已被 SpringerLink 等数据库收录! |
|