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Spectral and dose dependence of light-induced ion flux responses from maize leaves and their involvement in leaf expansion growth
dc.creator | Živanović, Branka D. | |
dc.creator | Cuin, Tracey Ann | |
dc.creator | Shabala, Sergey | |
dc.date.accessioned | 2022-04-05T14:13:49Z | |
dc.date.available | 2022-04-05T14:13:49Z | |
dc.date.issued | 2007 | |
dc.identifier.issn | 0032-0781 | |
dc.identifier.uri | http://rimsi.imsi.bg.ac.rs/handle/123456789/232 | |
dc.description.abstract | Two types of segments (intact leaf tissue and isolated mesophyll tissue respectively) were isolated from basal (still growing) and tip (non-growing) maize leaf regions. The leaf segments were exposed to different light qualities (blue or red light) and quantities, and net fluxes of K+, Ca2+ and H+ were measured non-invasively using ion-selective vibrating microelectrodes (the MIFF technique). A clear dose dependency of all ion flux responses on both red (RL) and blue (BL) light fluence rate was found. We provide evidence that light-induced K+ flux kinetics are different between growing and non-growing tissues and attribute this difference to the direct involvement of RL-induced K+ flux in turgor-driven leaf expansion growth controlled by the epidermis, as well as to the charge-balancing role of K+ in the leaf mesophyll. Generally, BL was much more efficient in stimulating K+ uptake in the growing basal region compared with RL. We also show a much stronger influence of RL on Ca2+ fluxes in the basal region compared with BL, which argues in favor of the importance of RL in Ca2+ signaling during leaf growth. | en |
dc.publisher | Oxford Univ Press, Oxford | |
dc.rights | restrictedAccess | |
dc.source | Plant and Cell Physiology | |
dc.subject | Zea mays L. | en |
dc.subject | photosynthesis | en |
dc.subject | light | en |
dc.subject | ion-selective microelectrodes | en |
dc.subject | ion fluxes | en |
dc.subject | expansion growth | en |
dc.title | Spectral and dose dependence of light-induced ion flux responses from maize leaves and their involvement in leaf expansion growth | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 605 | |
dc.citation.issue | 4 | |
dc.citation.other | 48(4): 598-605 | |
dc.citation.rank | aM21 | |
dc.citation.spage | 598 | |
dc.citation.volume | 48 | |
dc.identifier.doi | 10.1093/pcp/pcm032 | |
dc.identifier.pmid | 17329321 | |
dc.identifier.scopus | 2-s2.0-34250375225 | |
dc.identifier.wos | 000246664900004 | |
dc.type.version | publishedVersion |