Essential role for phytol kinase and tocopherol in tolerance to combined light and temperature stress in tomato

Spicher, Livia; Almeida, Juliana; Gutbrod, Katharina; Pipitone, Rosa; Dörmann, Peter; Glauser, Gaëtan; Rossi, Magdalena; Kessler, Félix

doi:10.1093/jxb/erx356

Cited by 74 publications

(50 citation statements)

References 61 publications

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“…Values statistically different at P , 0.05 are denoted with different letters. (Spicher et al, 2017). In addition, studies in sunflower (Helianthus annuus) identified responses specific to combined HL1HS involving the upregulation of transcripts associated with energy metabolism, protein synthesis, cell wall activity, and signal transduction components (Hewezi et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Jasmonic Acid Is Required for Plant Acclimation to a Combination of High Light and Heat Stress

et al. 2019

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Section: Discussionmentioning

confidence: 99%

Jasmonic Acid Is Required for Plant Acclimation to a Combination of High Light and Heat Stress

et al. 2019

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“…Phytol is an acyclic diterpene alcohol and a constituent of chlorophyll that is generated from chlorophyll breakdown [36][37][38] . Phytols are essential in the biosynthesis of tocopherols which is a well-known lipid antioxidant and contribute to the protection of photosystem II (PSII) against photodamage under environmental stress 37,39 . On the other hand, a large proportion of phytol and fatty acids is converted into fatty acid phytyl esters in chloroplasts, which are involved in maintaining the integrity of the photosynthetic membrane during abiotic stress and senescence in Arabidopsis thaliana 40 .…”

Section: Discussionmentioning

confidence: 99%

Screening of microalgae liquid extracts for their bio stimulant properties on plant growth, nutrient uptake and metabolite profile of Solanum lycopersicum L.

Mutale-joan

Benhima

Elmernissi

et al. 2020

Sci Rep

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The present study investigates the biostimulant effects of 18 Crude Bio-Extracts (CBEs) obtained from Microalgae and cyanobacteria on tomato plant growth, chlorophyll content, nutrient uptake and metabolite profile. Significant root and shoot length improvement (112.65%, 53.70%); was recorded at treatment with Aphanothece sp and C. ellipsoidea cBes respectively. Meanwhile, the highest root and shoot dry weight (DW) (34.81%, 58.69%) were obtained at treatment with Aphanothece sp. the latter also displayed the maximum uptake of nitrogen, phosphorus and potassium, which increased by 185.17%, 119.36% and 78.04% respectively compared with non-treated plants. Principal Component Analysis (PCA) confirmed that Phosphorus and Potassium levels in roots were closely related to enhanced Root length, whereas Nitrogen and chlorophyll b were closely related to Shoot and root DW. Additionally, Gas Chromatography-mass spectrometry (GC-MS) indicated that treatment with CBEs, induced the production of a vast array of metabolites. treated plants recorded higher accumulation of palmitic and stearic acids, which could indicate a stimulation in de novo Lipid synthesis. cBes also triggered the accumulation of pyridine-3-carboxamide (an amide active form of vitamin B3) and Linolenic acid; one of the key precursors in the biosynthetic pathway leading to plant jasmonates. Our results are a first step towards understanding the effects of microalgal extracts on plant physiology and biochemical pathways. further investigations on biochemical fractionation of microalgal extracts and agronomic tests of their purified bioactive compounds could be a useful principal novelty for indepth study of CBE action mechanisms. Other useful tools include; Comparative hormone profiling of treated and non-treated plants accompanied with combined High-throughput plant phenotyping, transcriptomics and metabolomics analysis.www.nature.com/scientificreports www.nature.com/scientificreports/ efficiency 6 . Thus, the use of plant biostimulants is a sustainable alternative strategy to improve crop yield and avert environmental pollution. A plant biostimulant is not a "fertilizer" in the true sense because it's function and role in plant growth is independent of its nutrient content 7 , but it's a material composed of substance(s) and/or microorganisms that stimulate natural processes in plants, leading to enhanced plant growth, nutrient use efficiency, tolerance against abiotic stresses and/or crop quality (European Biostimulant Industry Council EBIC, 2016) 5 . also defined plant biostimulants as; "a formulated product of biological origin that improves plant productivity as a consequence of the novel, or emergent properties of the complex of constituents, and not as a sole consequence of the presence of known essential plant nutrients, plant growth regulators, or plant protective compounds". Among the various categories, seaweeds have so far proven useful for the production of plant growth biostimulants 7-9 . However, far less attention has been focused on Mmicroal...

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“…Raw data were processed using MassLynx version 4.1 (waters) for automatic peak analysis. Identification and relative quantification were performed as described by Spicher et al (2017).…”

Section: Lipid and Carotenoid Measurementsmentioning

confidence: 99%

Plastidial NAD-Dependent Malate Dehydrogenase: A Moonlighting Protein Involved in Early Chloroplast Development through Its Interaction with an FtsH12-FtsHi Protease Complex

et al. 2018

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Malate dehydrogenases (MDHs) convert malate to oxaloacetate using NAD(H) or NADP(H) as a cofactor. mutants lacking plastidial NAD-dependent MDH () are embryo-lethal, and constitutive silencing (1) causes a pale, dwarfed phenotype. The reason for these severe phenotypes is unknown. Here, we rescued the embryo lethality of via embryo-specific expression of pdNAD-MDH. Rescued seedlings developed white leaves with aberrant chloroplasts and failed to reproduce. Inducible silencing of pdNAD-MDH at the rosette stage also resulted in white newly emerging leaves. These data suggest that pdNAD-MDH is important for early plastid development, which is consistent with the reductions in major plastidial galactolipid, carotenoid, and protochlorophyllide levels in1 seedlings. Surprisingly, the targeting of other NAD-dependent MDH isoforms to the plastid did not complement the embryo lethality of , while expression of enzymatically inactive pdNAD-MDH did. These complemented plants grew indistinguishably from the wild type. Both active and inactive forms of pdNAD-MDH interact with a heteromeric AAA-ATPase complex at the inner membrane of the chloroplast envelope. Silencing the expression of FtsH12, a key member of this complex, resulted in a phenotype that strongly resembles1. We propose that pdNAD-MDH is essential for chloroplast development due to its moonlighting role in stabilizing FtsH12, distinct from its enzymatic function.

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Essential role for phytol kinase and tocopherol in tolerance to combined light and temperature stress in tomato

Abstract: An essential role is identified for tocopherol in tomato under combined high-light and high-temperature stress. The dual antioxidant and membrane-stabilizing properties of tocopherol may explain its role in combined stress tolerance.

Cited by 74 publications

References 61 publications

Jasmonic Acid Is Required for Plant Acclimation to a Combination of High Light and Heat Stress

Jasmonic Acid Is Required for Plant Acclimation to a Combination of High Light and Heat Stress

Screening of microalgae liquid extracts for their bio stimulant properties on plant growth, nutrient uptake and metabolite profile of Solanum lycopersicum L.

Plastidial NAD-Dependent Malate Dehydrogenase: A Moonlighting Protein Involved in Early Chloroplast Development through Its Interaction with an FtsH12-FtsHi Protease Complex

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