Journal ArticleDOI
Changes in oxidative processes and components of the antioxidant system during tomato fruit ripening.
Ana Jiménez,Gary Creissen,Baldeep Kular,John L. Firmin,Susan Robinson,Martine Elisa Verhoeyen,Phil M. Mullineaux +6 more
TLDR
Changes in the activities of superoxide dismutase, catalase and the enzymes involved in the ascorbate-glutathione cycle during ripening indicated that the antioxidative system plays a fundamental role in the ripening of tomato fruits.Abstract:
Analysis of the oxidative processes taking place during fruit ripening in a salad tomato variety (Lycopersicon esculentum Mill. cv. Ailsa Craig) revealed changes in oxidative and antioxidative parameters. Hydrogen peroxide content, lipid peroxidation and protein oxidation were measured as indices of oxidative processes and all were found to increase at the breaker stage. The levels of the aqueous-phase antioxidants, glutathione and ascorbate, increased during the ripening process and these increases were associated with significant changes in their redox status, becoming more reduced as ripening progressed. Changes in the activities of superoxide dismutase, catalase and the enzymes involved in the ascorbate-glutathione cycle during ripening indicated that the antioxidative system plays a fundamental role in the ripening of tomato fruits.read more
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In Posidonia oceanica cadmium induces changes in DNA methylation and chromatin patterning
TL;DR: The data demonstrate that Cd perturbs the DNA methylation status through the involvement of a specific methyltransferase, linked to nuclear chromatin reconfiguration likely to establish a new balance of expressed/repressed chromatin.
Journal ArticleDOI
Cell wall modifications during fruit ripening: when a fruit is not the fruit
TL;DR: A critical review on the current knowledge concerning differences between fruits and cultivars and the need of using other species and more accurate methodologies to investigate general mechanisms and fruit specificities of softening among different fleshy fruits is provided.
Journal ArticleDOI
Controlled levels of salicylic acid are required for optimal photosynthesis and redox homeostasis
Alfonso Mateo,Dietmar Funck,Per Mühlenbock,Baldeep Kular,Philip M. Mullineaux,Stanislaw Karpinski +5 more
TL;DR: Observations implied an essential role of SA in the acclimation processes and in regulating the redox homeostasis of the cell in plants.
Journal ArticleDOI
Chloroplast Signaling and LESION SIMULATING DISEASE1 Regulate Crosstalk between Light Acclimation and Immunity in Arabidopsis
Per Mühlenbock,Magdalena Szechyńska-Hebda,Marian Plaszczyca,Marcela Baudo,Philip M. Mullineaux,Jane E. Parker,Barbara Karpinska,Stanislaw Karpinski +7 more
TL;DR: The data suggest that the balanced activities of LSD1, EDS1, PAD4, and EIN2 regulate signaling of programmed cell death, light acclimation, and holistic defense responses that are initiated, at least in part, by redox changes of the PQ pool.
Journal ArticleDOI
Effect of hydroxypropylmethylcellulose and chitosan coatings with and without bergamot essential oil on quality and safety of cold-stored grapes
Laura Sánchez-González,Clara Pastor,María Vargas,Amparo Chiralt,Chelo González-Martínez,Maite Cháfer +5 more
TL;DR: In this paper, the authors applied biodegradable coatings based on HPMC or CH with and without bergamot essential oil to table grapes, cv. Muscatel, in order to find environmentally friendly, healthy treatments with which to better preserve fresh fruit quality and safety during postharvest cold storage.
References
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Journal ArticleDOI
Leaf Senescence: Correlated with Increased Levels of Membrane Permeability and Lipid Peroxidation, and Decreased Levels of Superoxide Dismutase and Catalase
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Ethylene in plant biology
TL;DR: This book discusses Ethylene Analysis and Properties of the Gas, the Role of Ethylene in Agriculture, and Roles and Physiological Effects ofEthylene in Plant Physiology: Dormancy, Growth and Development.
Ethylene in Plant Biology
TL;DR: This book discusses Ethylene Analysis and Properties of the Gas, the Role of Ethylene in Agriculture, and Roles and Physiological Effects ofEthylene in Plant Physiology: Dormancy, Growth and Development.
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The presence of glutathione and glutathione reductase in chloroplasts: A proposed role in ascorbic acid metabolism.
TL;DR: It is proposed that glutathione functions to stabilise enzymes of the Calvin cycle, and it may also act to keep ascorbic acid in chloroplasts in the reduced form.
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