Microscopic and macroscopic monitoring of adaxial–abaxial pH gradients in the leaf apoplast of Vicia faba L. as primed by NaCl stress at the roots

Geilfus, Christoph-Martin and Mühling, Karl-Hermann (2014) Microscopic and macroscopic monitoring of adaxial–abaxial pH gradients in the leaf apoplast of Vicia faba L. as primed by NaCl stress at the roots Plant Science, 223 . pp. 109-115. DOI 10.1016/j.plantsci.2014.03.012.

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Abstract

The pH is a basic chemical requirement in cellular and apoplastic compartments that influences various physiological processes in plants. Apoplastic pH shifts can modulate the apoplastic and symplastic distribution of plant hormones or influence proton motive force-driven uptake processes over the plasma-membrane. Changing environments are known to effect on the apoplastic H(+)-concentration in leaves and roots. The onset of NaCl-stress at the roots for instance primes a chloride-specific systemic alkalinization of the leaf apoplast. By means of microscopy- and macroscopy-based in planta ratio-imaging we surprisingly found that large adaxial-abaxial pH gradients were established throughout the leaf apoplast during the formation of the NaCl-induced alkalinization. Moreover, the root system is necessary to ensure the transient nature of the leaf apoplastic alkalinization.

Document Type: Article
Refereed: Yes
DOI etc.: 10.1016/j.plantsci.2014.03.012
ISSN: 01689452
Date Deposited: 27 Jun 2017 12:18
Last Modified: 27 Jun 2017 12:18
URI: http://eprints.uni-kiel.de/id/eprint/38603

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