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Light-induced transient ion flux responses from maize leaves and their association with leaf growth and photosynthesis

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2005
Authors
Živanović, Branka D.
Pang, J
Shabala, Sergey
Article (Published version)
Metadata
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Abstract
Net fluxes of H+, K+ and Ca2+ ions from maize (Zea mays L.) isolated leaf segments were measured non-invasively using ion-selective vibrating microelectrodes (the MIFE technique). Leaf segments were isolated from the blade base, containing actively elongating cells (basal segments), and from non-growing tip regions (tip segments). Ion fluxes were measured in response to bright white light (2600 mumol m(-2) s(-1)) from either the leaf segments or the underlying mesophyll (after stripping the epidermis). Fluxes measured from the mesophyll showed no significant difference between basal and tip regions. In leaf segments (epidermis attached), light-induced flux kinetics of all ions measured (H+, Ca2+ and K+) were strikingly different between the two regions. It appears that epidermal K+ fluxes are required to drive leaf expansion growth, whereas in the mesophyll light-induced K+ flux changes are likely to play a charge balancing role. Light-stimulated Ca2+ influx was not directly attributab...le either to leaf photosynthetic performance or to leaf expansion growth. It is concluded that light-induced ion flux changes are associated with both leaf growth and photosynthesis.

Keywords:
Zea mays L / potassium / photosynthesis / leaf / hydrogen / expansion growth / epidermis / calcium
Source:
Plant Cell and Environment, 2005, 28, 3, 340-352
Publisher:
  • Wiley, Hoboken

DOI: 10.1111/j.1365-3040.2005.01270.x

ISSN: 0140-7791

PubMed: 16021786

WoS: 000227087600007

Scopus: 2-s2.0-14644425338
[ Google Scholar ]
26
URI
http://rimsi.imsi.bg.ac.rs/handle/123456789/129
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Institut za multidisciplinarna istraživanja
TY  - JOUR
AU  - Živanović, Branka  D.
AU  - Pang, J
AU  - Shabala, Sergey
PY  - 2005
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/129
AB  - Net fluxes of H+, K+ and Ca2+ ions from maize (Zea mays L.) isolated leaf segments were measured non-invasively using ion-selective vibrating microelectrodes (the MIFE technique). Leaf segments were isolated from the blade base, containing actively elongating cells (basal segments), and from non-growing tip regions (tip segments). Ion fluxes were measured in response to bright white light (2600 mumol m(-2) s(-1)) from either the leaf segments or the underlying mesophyll (after stripping the epidermis). Fluxes measured from the mesophyll showed no significant difference between basal and tip regions. In leaf segments (epidermis attached), light-induced flux kinetics of all ions measured (H+, Ca2+ and K+) were strikingly different between the two regions. It appears that epidermal K+ fluxes are required to drive leaf expansion growth, whereas in the mesophyll light-induced K+ flux changes are likely to play a charge balancing role. Light-stimulated Ca2+ influx was not directly attributable either to leaf photosynthetic performance or to leaf expansion growth. It is concluded that light-induced ion flux changes are associated with both leaf growth and photosynthesis.
PB  - Wiley, Hoboken
T2  - Plant Cell and Environment
T1  - Light-induced transient ion flux responses from maize leaves and their association with leaf growth and photosynthesis
EP  - 352
IS  - 3
SP  - 340
VL  - 28
DO  - 10.1111/j.1365-3040.2005.01270.x
ER  - 
@article{
author = "Živanović, Branka  D. and Pang, J and Shabala, Sergey",
year = "2005",
abstract = "Net fluxes of H+, K+ and Ca2+ ions from maize (Zea mays L.) isolated leaf segments were measured non-invasively using ion-selective vibrating microelectrodes (the MIFE technique). Leaf segments were isolated from the blade base, containing actively elongating cells (basal segments), and from non-growing tip regions (tip segments). Ion fluxes were measured in response to bright white light (2600 mumol m(-2) s(-1)) from either the leaf segments or the underlying mesophyll (after stripping the epidermis). Fluxes measured from the mesophyll showed no significant difference between basal and tip regions. In leaf segments (epidermis attached), light-induced flux kinetics of all ions measured (H+, Ca2+ and K+) were strikingly different between the two regions. It appears that epidermal K+ fluxes are required to drive leaf expansion growth, whereas in the mesophyll light-induced K+ flux changes are likely to play a charge balancing role. Light-stimulated Ca2+ influx was not directly attributable either to leaf photosynthetic performance or to leaf expansion growth. It is concluded that light-induced ion flux changes are associated with both leaf growth and photosynthesis.",
publisher = "Wiley, Hoboken",
journal = "Plant Cell and Environment",
title = "Light-induced transient ion flux responses from maize leaves and their association with leaf growth and photosynthesis",
pages = "352-340",
number = "3",
volume = "28",
doi = "10.1111/j.1365-3040.2005.01270.x"
}
Živanović, Branka  D., Pang, J.,& Shabala, S.. (2005). Light-induced transient ion flux responses from maize leaves and their association with leaf growth and photosynthesis. in Plant Cell and Environment
Wiley, Hoboken., 28(3), 340-352.
https://doi.org/10.1111/j.1365-3040.2005.01270.x
Živanović, Branka  D., Pang J, Shabala S. Light-induced transient ion flux responses from maize leaves and their association with leaf growth and photosynthesis. in Plant Cell and Environment. 2005;28(3):340-352.
doi:10.1111/j.1365-3040.2005.01270.x .
Živanović, Branka  D., Pang, J, Shabala, Sergey, "Light-induced transient ion flux responses from maize leaves and their association with leaf growth and photosynthesis" in Plant Cell and Environment, 28, no. 3 (2005):340-352,
https://doi.org/10.1111/j.1365-3040.2005.01270.x . .

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