Next Article in Journal
The Control of Auxin Transport in Parasitic and Symbiotic Root–Microbe Interactions
Next Article in Special Issue
Rice Phytochrome B (OsPhyB) Negatively Regulates Dark- and Starvation-Induced Leaf Senescence
Previous Article in Journal
Abscisic Acid: Hidden Architect of Root System Structure
Previous Article in Special Issue
Early Autumn Senescence in Red Maple (Acer rubrum L.) Is Associated with High Leaf Anthocyanin Content
Open AccessArticle

Sulfite Oxidase Activity Is Essential for Normal Sulfur, Nitrogen and Carbon Metabolism in Tomato Leaves

1
French Associates Institute for Agriculture and Biotechnology of Drylands, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus 84990, Israel
2
Migal-Galilee Technology Center, Southern Industrial Zone, POB831 Kiryat-Shmona 11016, Israel
3
Department of Plant Sciences, Weizmann Institute of Science, P.O.B. 26 Rehovot 76100, Israel
*
Author to whom correspondence should be addressed.
Academic Editor: Salma Balazadeh
Plants 2015, 4(3), 573-605; https://doi.org/10.3390/plants4030573
Received: 7 June 2015 / Revised: 30 July 2015 / Accepted: 7 August 2015 / Published: 14 August 2015
(This article belongs to the Special Issue Plant Senescence)
Plant sulfite oxidase [SO; E.C.1.8.3.1] has been shown to be a key player in protecting plants against exogenous toxic sulfite. Recently we showed that SO activity is essential to cope with rising dark-induced endogenous sulfite levels in tomato plants (Lycopersicon esculentum/Solanum lycopersicum Mill. cv. Rheinlands Ruhm). Here we uncover the ramifications of SO impairment on carbon, nitrogen and sulfur (S) metabolites. Current analysis of the wild-type and SO-impaired plants revealed that under controlled conditions, the imbalanced sulfite level resulting from SO impairment conferred a metabolic shift towards elevated reduced S-compounds, namely sulfide, S-amino acids (S-AA), Co-A and acetyl-CoA, followed by non-S-AA, nitrogen and carbon metabolite enhancement, including polar lipids. Exposing plants to dark-induced carbon starvation resulted in a higher degradation of S-compounds, total AA, carbohydrates, polar lipids and total RNA in the mutant plants. Significantly, a failure to balance the carbon backbones was evident in the mutants, indicated by an increase in tricarboxylic acid cycle (TCA) cycle intermediates, whereas a decrease was shown in stressed wild-type plants. These results indicate that the role of SO is not limited to a rescue reaction under elevated sulfite, but SO is a key player in maintaining optimal carbon, nitrogen and sulfur metabolism in tomato plants. View Full-Text
Keywords: sulfite oxidase; dark-induced senescence; sulfur; nitrogen; carbon metabolism; lipid degradation sulfite oxidase; dark-induced senescence; sulfur; nitrogen; carbon metabolism; lipid degradation
Show Figures

Graphical abstract

MDPI and ACS Style

Brychkova, G.; Yarmolinsky, D.; Batushansky, A.; Grishkevich, V.; Khozin-Goldberg, I.; Fait, A.; Amir, R.; Fluhr, R.; Sagi, M. Sulfite Oxidase Activity Is Essential for Normal Sulfur, Nitrogen and Carbon Metabolism in Tomato Leaves. Plants 2015, 4, 573-605. https://doi.org/10.3390/plants4030573

AMA Style

Brychkova G, Yarmolinsky D, Batushansky A, Grishkevich V, Khozin-Goldberg I, Fait A, Amir R, Fluhr R, Sagi M. Sulfite Oxidase Activity Is Essential for Normal Sulfur, Nitrogen and Carbon Metabolism in Tomato Leaves. Plants. 2015; 4(3):573-605. https://doi.org/10.3390/plants4030573

Chicago/Turabian Style

Brychkova, Galina; Yarmolinsky, Dmitry; Batushansky, Albert; Grishkevich, Vladislav; Khozin-Goldberg, Inna; Fait, Aaron; Amir, Rachel; Fluhr, Robert; Sagi, Moshe. 2015. "Sulfite Oxidase Activity Is Essential for Normal Sulfur, Nitrogen and Carbon Metabolism in Tomato Leaves" Plants 4, no. 3: 573-605. https://doi.org/10.3390/plants4030573

Find Other Styles

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Search more from Scilit
 
Search
Back to TopTop