Journal ArticleDOI
SlHY5 is a necessary regulator of the cold acclimation response in tomato
TLDR
It is indicated that SlHY5 enhances plant tolerance to cold stress and that it may be used to facilitate the enhancement of stress tolerance in tomato.Abstract:
HY5, a bZIP transcription factor, plays a key role in the light- and cold-stress signaling pathways. In this study, the tomato HY5 gene (SlHY5) was isolated and characterized with respect to its function in cold-stress tolerance. The expression level of SlHY5 was similar in the root, stem, leaf, flower, and fruit of tomato. SlHY5 was upregulated gradually during cold stress and was induced in response to NaCl and the plant hormone abscisic acid. Overexpression of SlHY5 in tomato markedly increased cold stress tolerance. In addition, the SlHY5-overexpressing lines exhibited enhanced expression of genes related to antioxidant defense systems (SOD and CAT) and anthocyanin biosynthesis (CHS, CHI, and F3H) under cold stress compared to the wild-type plants, which suggested that overexpression of SlHY5 alleviated oxidative damage and lipid peroxidation, relieved membrane injuries induced by cold stress, enhanced anthocyanin accumulation, and thereby enhanced the cold-stress tolerance of SlHY5-overexpressing tomato plants. Furthermore, SlHY5 was involved in the regulation of several cold-induced genes, including PR1, CYSb, LEA, Osmotin, and ICE1, suggesting that constitutive overexpression of SlHY5 in tomato modulates the expression of other stress-responsive genes, thereby imparting cold tolerance. In conclusion, these results indicate that SlHY5 enhances plant tolerance to cold stress and that it may be used to facilitate the enhancement of stress tolerance in tomato.read more
Citations
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Journal ArticleDOI
Transcriptional regulation and signalling of cold stress response in plants: An overview of current understanding
TL;DR: It is reckons that new insights and focus research are required for developing resilient plant species towards low temperature for achieving agricultural sustainability and ensuring food security in the coming years.
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Seed 'primeomics': plants memorize their germination under stress
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UV-B priming enhances specific secondary metabolites in Oryza sativa (L.) empowering to encounter diverse abiotic stresses
T. T. D. Thomas,Jos T. Puthur +1 more
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Journal ArticleDOI
Characterization of novel regulators for heat stress tolerance in tomato from Indian sub-continent.
TL;DR: This study identifies several novel HS tolerance genes and provides proof of their utility in tomato thermotolerance, which is increasing in the tropics/sub‐tropics.
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Dissecting postharvest chilling injury through biotechnology.
TL;DR: In this paper , the authors describe progress made in identifying the cellular and molecular processes underlying postharvest chilling injury (PCI) and point to advances in biotechnological approaches for ameliorating symptoms.
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Biosynthesis of plant pigments: anthocyanins, betalains and carotenoids
TL;DR: Three classes of pigments act as visible signals to attract insects, birds and animals for pollination and seed dispersal, and protect plants from damage caused by UV and visible light.