Cold responses of<i>Arabidopsis</i>mutants impaired in freezing tolerance

McKown, Robert L.; Kuroki, Gary; Warren, Gareth J.

doi:10.1093/jxb/47.12.1919

Cited by 122 publications

(87 citation statements)

References 25 publications

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“…It is well documented that lipid composition changes during cold acclimation in a wide range of plants and there are compelling data to indicate that this contributes to greater freezing tolerance (Steponkus et al, 1993). In a similar manner, the levels of Pro and Suc increase in Arabidopsis (McKown et al, 1996;Wanner and Junttila, 1999) and other plants (Guy et al, 1992;Koster and Lynch, 1992) during cold acclimation and are likely to have roles in freezing tolerance. There is evidence that Pro can protect both membranes and proteins against freeze-induced damage in vitro (Rudolph and Crowe, 1985;Carpenter and Crowe, 1988) and direct evidence that increased levels of Pro enhances whole plant freezing tolerance (Nanjo et al, 1999).…”

mentioning

confidence: 86%

Overexpression of the ArabidopsisCBF3Transcriptional Activator Mimics Multiple Biochemical Changes Associated with Cold Acclimation

et al. 2000

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We further investigated the role of the Arabidopsis CBF regulatory genes in cold acclimation, the process whereby certain plants increase in freezing tolerance upon exposure to low temperature. The CBF genes, which are rapidly induced in response to low temperature, encode transcriptional activators that control the expression of genes containing the C-repeat/ dehydration responsive element DNA regulatory element in their promoters. Constitutive expression of either CBF1 or CBF3 (also known as DREB1b and DREB1a, respectively) in transgenic Arabidopsis plants has been shown to induce the expression of target COR (cold-regulated) genes and to enhance freezing tolerance in nonacclimated plants. Here we demonstrate that overexpression of CBF3 in Arabidopsis also increases the freezing tolerance of cold-acclimated plants. Moreover, we show that it results in multiple biochemical changes associated with cold acclimation: CBF3-expressing plants had elevated levels of proline (Pro) and total soluble sugars, including sucrose, raffinose, glucose, and fructose. Plants overexpressing CBF3 also had elevated P5CS transcript levels suggesting that the increase in Pro levels resulted, at least in part, from increased expression of the key Pro biosynthetic enzyme ⌬ 1 -pyrroline-5-carboxylate synthase. These results lead us to propose that CBF3 integrates the activation of multiple components of the cold acclimation response.

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confidence: 86%

Overexpression of the ArabidopsisCBF3Transcriptional Activator Mimics Multiple Biochemical Changes Associated with Cold Acclimation

et al. 2000

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“…Warren and colleagues (15) have used chemical mutagenesis to identify seven Arabidopsis genes, designated SFR (sensitivity to freezing), that affect cold acclimation. Mutant alleles of five of these genes (sfr1, 2, 4, 5-1, 5-2, and 6) have no obvious adverse effects on the ability of plants to cope with low nonfreezing temperatures, but decrease the level of freezing tolerance that plants attain with cold acclimation.…”

Section: The Sfr and Eskimo1 Freezing Tolerance Genesmentioning

confidence: 99%

So What's New in the Field of Plant Cold Acclimation? Lots!

2001

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“…Christie et al (39) consider the anthocyanin biosynthetic pathway to involve cor (coldregulation) genes but observe that very cold temperatures destroy the biosynthetic capability. McKown et al (73) agree that there is some commonality between anthocyanin biosynthesis and freezing tolerance, in either the synthetic or regulatory pathways leading to both. It should be noted, however, that low temperatures in the absence of either visible light (23) or UVB (71) prevent anthocyanin biosynthesis.…”

Section: Cold Temperature Inductionmentioning

confidence: 99%

“…McKown et al (73) suggest some commonality between anthocyanin biosynthesis and freezing tolerance, as four Arabidopsis mutants deficient in freezing tolerance were unable to accumulate anthocyanins. Autumn induction of anthocyanins is widely known and occurs in tandem with the onset of dormancy and cold hardiness in many woody plants.…”

Section: Environmental Strain Reduction-cold Hardinessmentioning

confidence: 99%

Environmental Significance of Anthocyanins in Plant Stress Responses

Chalker-Scott

1999

Photochem & Photobiology

1,281

386

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Anthocyanins are water-soluble pigments found in all plant tissues throughout the plant kingdom. Our understanding of anthocyanin biosynthesis and its molecular control has greatly improved in the last decade. The adaptive advantages of anthocyanins, especially in nonreproductive tissues, is much less clear. Anthocyanins often appear transiently at specific developmental stages and may be induced by a number of environmental factors including visible and UVB radiation, cold temperatures and water stress. The subsequent production and localization of anthocyanins in root, stem and especially leaf tissues may allow the plant to develop resistance to a number of environmental stresses. This article reviews the environmental induction of anthocyanins and their proposed importance in ameliorating environmental stresses induced by visible and UVB radiation, drought and cold temperatures.

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Cold responses ofArabidopsismutants impaired in freezing tolerance

Cited by 122 publications

References 25 publications

Overexpression of the ArabidopsisCBF3Transcriptional Activator Mimics Multiple Biochemical Changes Associated with Cold Acclimation

Overexpression of the ArabidopsisCBF3Transcriptional Activator Mimics Multiple Biochemical Changes Associated with Cold Acclimation

So What's New in the Field of Plant Cold Acclimation? Lots!

Environmental Significance of Anthocyanins in Plant Stress Responses

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