Heat shock proteins and chilling sensitivity of mung bean hypocotyls

Collins, Graham; Nie, X.; Saltveit, Mikal E.

doi:10.1093/jxb/46.7.795

Cited by 73 publications

(40 citation statements)

References 18 publications

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“…In addition, ethylene production decreased sharply at low temperatures and rose rapidly (within 1 d) after a return to normal temperatures in winter wheat (Triticum aestivum) and dwarf bean (Phaseolus vulgaris) (Field, 1984;Machá ccková et al, 1989). Another study from mung bean (Vigna radiata) seedlings showed that improved tolerance was associated with suppression of ethylene biosynthesis (Collins et al, 1995). However, the opposite conclusion was reached in other studies in several plant species, including tomato (Solanum lycopersicum), cucumber (Cucumis sativus), and tobacco (Nicotiana tabacum cv NC89) (Wang and Adams, 1982;Ciardi et al, 1997;Zhang and Huang, 2010).…”

Section: Ethylene Signaling Plays An Important Role In Cold Stress Simentioning

confidence: 99%

Ethylene Signaling Negatively Regulates Freezing Tolerance by Repressing Expression of CBF and Type-A ARR Genes in Arabidopsis

et al. 2012

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The phytohormone ethylene regulates multiple aspects of plant growth and development and responses to environmental stress. However, the exact role of ethylene in freezing stress remains unclear. Here, we report that ethylene negatively regulates plant responses to freezing stress in Arabidopsis thaliana. Freezing tolerance was decreased in ethylene overproducer1 and by the application of the ethylene precursor 1-aminocyclopropane-1-carboxylic acid but increased by the addition of the ethylene biosynthesis inhibitor aminoethoxyvinyl glycine or the perception antagonist Ag + . Furthermore, ethylene-insensitive mutants, including etr1-1, ein4-1, ein2-5, ein3-1, and ein3 eil1, displayed enhanced freezing tolerance. By contrast, the constitutive ethylene response mutant ctr1-1 and EIN3-overexpressing plants exhibited reduced freezing tolerance. Genetic and biochemical analyses revealed that EIN3 negatively regulates the expression of CBFs and type-A Arabidopsis response regulator5 (ARR5), ARR7, and ARR15 by binding to specific elements in their promoters. Overexpression of these ARR genes enhanced the freezing tolerance of plants. Thus, our study demonstrates that ethylene negatively regulates cold signaling at least partially through the direct transcriptional control of cold-regulated CBFs and type-A ARR genes by EIN3. Our study also provides evidence that type-A ARRs function as key nodes to integrate ethylene and cytokinin signaling in regulation of plant responses to environmental stress.

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Section: Ethylene Signaling Plays An Important Role In Cold Stress Simentioning

confidence: 99%

Ethylene Signaling Negatively Regulates Freezing Tolerance by Repressing Expression of CBF and Type-A ARR Genes in Arabidopsis

et al. 2012

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“…It involves the synergistic coactivation of nonspecific stress-responsive pathways that cross biotic-abiotic stress boundaries. The synergistic coactivation of plant stress responses confers a preemptive advantage by enabling a general increase in stress resistance following exposure to a single stress condition (Collins et al, 1995;Ryu et al, 1995). While the precise molecular and physiological mechanisms remain poorly defined, the acquisition of cross tolerance is linked to enhanced production of ROS and oxidative signaling pathways that operate at the interface between redox and hormone signaling networks (Bartoli et al, 2012).…”

Section: The Influence Of Global Change Factors On Redox Signaling Pamentioning

confidence: 99%

The Impact of Global Change Factors on Redox Signaling Underpinning Stress Tolerance

2012

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Reduction/oxidation (redox) metabolism and associated signaling are key components of cross tolerance to biotic and abiotic stresses in plants. Climate change factors such as predicted increases in temperature and the availability of atmospheric carbon dioxide (CO 2 ) and ozone (O 3 ) will have a profound effect on oxidative signaling in plants, particularly in relation to photosynthetic metabolism and environmental stress responses. Redox signaling is responsive to myriad environmental signals through influences on metabolism and the triggered activation of the suite of oxidative burst-generating enzymes, whose function is to enhance the oxidation state of the apoplast/cell wall environment. Like reactive oxygen species (ROS), the abundance of low molecular antioxidants such as ascorbate, glutathione, tocopherols and carotenoids, and antioxidant enzymes is modified by environmental triggers. Oxidants and antioxidants do not operate in isolated linear redox signaling pathways. Rather, they are part of a much larger stress signaling network that integrates information from many pathways including hormones and sugars to regulate plant growth and defense responses. Here, we explore the likely responses of oxidants and antioxidants to global change factors and discuss how they might modify gene expression, influencing overall plant fitness through altered stress responses.

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“…NC89) (Wang and Adams 1982;Ciardi et al 1997;Zhang and Huang 2010). In contrast, improved cold tolerance was associated with the suppression of ethylene biosynthesis in mung bean (Vignaradiata) and Arabidopsis (Collins et al 1995;Shi et al 2012). In Arabidopsis, application of the ethylene precursor ACC decreases freezing tolerance, whereas application of the ethylene biosynthesis inhibitor AVG and the ethylene receptor antagonist AgNO 3 promote freezing tolerance.…”

Section: Ethylene and Cold Stressmentioning

confidence: 99%

ABA Regulation of the Cold Stress Response in Plants

Shi

Yang

2014

Abscisic Acid: Metabolism, Transport and Signaling

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Low temperature is a major environmental factor that limits plant growth, productivity, and distribution. To ensure optimal growth and survival, plants must respond and adapt to cold stress using a variety of biochemical and physiological processes. Currently, the most thoroughly understood cold-signalling pathway is the C-repeat binding factor/DRE-binding factor (CBF/DREB) transcriptional regulatory cascade. Abscisic acid (ABA) is an important stress hormone in plants that has been demonstrated to be involved in the cold stress response through regulation of a set of specific stress-responsive genes. The current consensus is that both ABA-dependent and ABA-independent pathways are involved in plant responses to cold stress. This chapter summarises recent progress made in our understanding of cold signalling and the role of ABA in cold stress, and we also address cross talk between ABA and several classical phytohormones that integrate with cold signalling.

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Heat shock proteins and chilling sensitivity of mung bean hypocotyls

Cited by 73 publications

References 18 publications

Ethylene Signaling Negatively Regulates Freezing Tolerance by Repressing Expression of CBF and Type-A ARR Genes in Arabidopsis

Ethylene Signaling Negatively Regulates Freezing Tolerance by Repressing Expression of CBF and Type-A ARR Genes in Arabidopsis

The Impact of Global Change Factors on Redox Signaling Underpinning Stress Tolerance

ABA Regulation of the Cold Stress Response in Plants

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