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New insights into the regulation of stomatal movements by red light, carbon dioxide and circadian rhythms

Matrosova, Anastasia (2015). New insights into the regulation of stomatal movements by red light, carbon dioxide and circadian rhythms. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2015:121
ISBN 978-91-576-8440-0
eISBN 978-91-576-8441-7
[Doctoral thesis]

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Abstract

Stomata are small adjustable pores formed by pairs of guard cells that enable gas exchange between leaves and the atmosphere, thus directly affecting water loss and CO₂ uptake in plants. The current work focuses on the regulation of stomatal movements by red light, carbon dioxide and the circadian system and attempts to uncover molecular mechanisms that control guard cell function.

The signaling pathway that underlays stomatal opening in response to red light is yet to be fully elucidated. Here, the HIGH LEAF TEMPERATURE 1 (HT1) protein kinase, known as a negative regulator of high CO₂ stomatal closure, is shown to be a key component of stomatal signaling in response to red light (Paper I). It was demonstrated that HT1 is epistatic to the positive regulator of ABA- and high CO₂-induced stomatal closure OPEN STOMATA1 (OST1) protein kinase both in red light- and CO₂-induced signal transduction in guard cells (Paper I). A photosynthesis-induced drop in intercellular [CO₂] as well as processes originating in the photosynthetic electron transport chain (PETC) have been proposed to signal the guard cell response to red light. Investigation of the effect of PETC inhibitors on stomatal conductance in Arabidopsis thaliana ecotypes Col-0 and Ely-1a has suggested the redox state of plastoquinone (PQ) pool to be involved in the regulation of stomatal movements (Paper II).

The full mechanisms that link the regulation of stomatal movements to the circadian clock are yet unknown. The blue light receptor, F-box protein and key element of the circadian clock ZEITLUPE (ZTL) was here shown to physically interact with OST1 protein kinase (Paper III). Furthermore, Arabidopsis thaliana mutant plants and Populus transgenic lines that lack the activity of ZTL or OST1 demonstrated similar phenotypes, affected in stomatal movement control (Paper III). The work supports a requirement of both ZTL and OST1 in the regulation of guard cell turgor and suggests a direct link between the circadian clock and OST1 activity.

Authors/Creators:Matrosova, Anastasia
Title:New insights into the regulation of stomatal movements by red light, carbon dioxide and circadian rhythms
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :November 2015
Depositing date:November 2015
Volume:2015:121
Number of Pages:67
Papers/manuscripts:
NumberReferences
IMatrosova A, Bogireddi H, Mateo-Penas A, Hashimoto-Sugimoto M, Iba K, Schroeder JI, Israelsson-Nordström (2015). The HT1 protein kinase is essential for red light-induced stomatal opening and genetically interacts with OST1 in red light and CO₂-induced stomatal movement responses. New Phytologist 208 (4), 1-12.
IIMateo-Penas A, Matrosova A, Israelsson-Nordström M. Redox-status of the plastoquinone pool determines stomatal movements in plants: lessons from the two Arabidopsis thaliana ecotypes Col-0 and atrazine-resistant Ely-1a (manuscript).
IIIJurca M, Matrosova A, Johansson M, Ibanez C, Kozarewa I, Bako L Webb AR, Israelsson-Nordström M, Eriksson. ZEITLUPE interacts with OPEN STOMATA 1 and reveals a clock-regulated stomatal aperture control (manuscript).
Place of Publication:Umeå
Publisher:Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-8440-0
ISBN for electronic version:978-91-576-8441-7
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F30 Plant genetics and breeding
F Plant production > F60 Plant physiology and biochemistry
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Biochemistry and Molecular Biology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Botany
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Genetics (medical genetics to be 30107 and agricultural genetics to be 40402)
Agrovoc terms:leaves, stomata, stomatal conductance, light, carbon dioxide, quinones, circadian rhytm, oxidoreductions, redox potential, photosynthesis, arabidopsis thaliana, populus
Keywords:stomatal opening, red light, plastoquinone, redox regulation, circadian clock
URN:NBN:urn:nbn:se:slu:epsilon-e-3065
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3065
ID Code:12812
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: Anastasia Matrosova
Deposited On:13 Nov 2015 07:38
Metadata Last Modified:06 Feb 2016 10:17

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