Gene expression during leaf senescence

Smart, Catherine M.

doi:10.1111/j.1469-8137.1994.tb04243.x

Cited by 620 publications

(502 citation statements)

References 267 publications

(221 reference statements)

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“…Our findings of active PUMP in the ripe (red) tomatoes and in potato tubers suggest a role for regulated uncoupling during fruit ripening, senescence, and seed dormancy. Mitochondria in fruits play their role until the final stages of ripening (27,28), and in storage tissues during the whole lifetime. A regulated uncoupling promoted by PUMP could be the primary cause of the climacteric rise in respiration (29), known since 1925 (30).…”

Section: Discussionmentioning

confidence: 99%

Reconstituted Plant Uncoupling Mitochondrial Protein Allows for Proton Translocation via Fatty Acid Cycling Mechanism

Ježek¹,

Costa²,

Vercesi³

1997

Journal of Biological Chemistry

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Section: Discussionmentioning

confidence: 99%

Reconstituted Plant Uncoupling Mitochondrial Protein Allows for Proton Translocation via Fatty Acid Cycling Mechanism

Ježek¹,

Costa²,

Vercesi³

1997

Journal of Biological Chemistry

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“…Senescence program is thus believed to be regulated by speci®c genes (Buchanan-Wollaston, 1997;Buchanan-Wollaston et al, 2003;Dangl et al, 2000;Gan and Amasino, 1997;Quirino et al, 2000;Smart, 1994;Yoshida, 2003). Expression of many genes associated with photosynthetic activity and other anabolic processes is downregulated during leaf senescence (Gepstein, 1988), whereas others are upregulated.…”

Section: Introductionmentioning

confidence: 99%

Large‐scale identification of leaf senescence‐associated genes

et al. 2003

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SummaryLeaf senescence is a form of programmed cell death, and is believed to involve preferential expression of a speci®c set of`senescence-associated genes' (SAGs). To decipher the molecular mechanisms and the predicted complex network of regulatory pathways involved in the senescence program, we have carried out a large-scale gene identi®cation study in a reference plant, Arabidopsis thaliana. Using suppression subtractive hybridization, we isolated approximately 800 cDNA clones representing SAGs expressed in senescing leaves. Differential expression was con®rmed by Northern blot analysis for 130 non-redundant genes. Over 70 of the identi®ed genes have not previously been shown to participate in the senescence process. SAGencoded proteins are likely to participate in macromolecule degradation, detoxi®cation of oxidative metabolites, induction of defense mechanisms, and signaling and regulatory events. Temporal expression pro®les of selected genes displayed several distinct patterns, from expression at a very early stage, to the terminal phase of the senescence syndrome. Expression of some of the novel SAGs, in response to age, leaf detachment, darkness, and ethylene and cytokinin treatment was compared. The large repertoire of SAGs identi®ed here provides global insights about regulatory, biochemical and cellular events occurring during leaf senescence.

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“…Temperature and photoperiod are regularly mentioned as the most influential environmental cues in triggering leaf senescence, but their respective contributions have not been fully elucidated (see Estrella and Menzel 2006). Several stresses, such as drought (Hwang et al 2014;Estiarte and Peñuelas 2014), water logging, and mineral deficiencies (Smart 1994), can also hasten leaf senescence, primary growth cessation, and bud-set.…”

Section: Phenology Of Leaves and Reproductive Structuresmentioning

confidence: 99%

Temperate and boreal forest tree phenology: from organ-scale processes to terrestrial ecosystem models

Delpierre

Vitasse

Chuine

et al. 2016

Annals of Forest Science

234

192

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Abstract& Key message We demonstrate that, beyond leaf phenology, the phenological cycles of wood and fine roots present clear responses to environmental drivers in temperate and boreal trees. These drivers should be included in terrestrial ecosystem models. & Context In temperate and boreal trees, a dormancy period prevents organ development during adverse climatic conditions. Whereas the phenology of leaves and flowers has received considerable attention, to date, little is known regarding the phenology of other tree organs such as wood, fine roots, fruits, and reserve compounds. & Aims Here, we review both the role of environmental drivers in determining the phenology of tree organs and the models used to predict the phenology of tree organs in temperate and boreal forest trees. & Results Temperature is a key driver of the resumption of tree activity in spring, although its specific effects vary among organs. There is no such clear dominant environmental cue involved in the cessation of tree activity in autumn and in the onset of dormancy, but temperature, photoperiod, and water stress appear as prominent factors. The phenology of a given organ is, to a certain extent, influenced by processes in distant organs. & Conclusion Inferring past trends and predicting future trends of tree phenology in a changing climate requires specific phenological models developed for each organ to consider the phenological cycle as an ensemble in which the environmental cues that trigger each phase are also indirectly involved in the subsequent phases. Incorporating such models into terrestrial ecosystem models (TEMs) would likely improve the accuracy of their predictions. The extent to which the coordination of the phenologies of tree organs will be affected in a changing climate deserves further research.

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Gene expression during leaf senescence

Cited by 620 publications

References 267 publications

Reconstituted Plant Uncoupling Mitochondrial Protein Allows for Proton Translocation via Fatty Acid Cycling Mechanism

Reconstituted Plant Uncoupling Mitochondrial Protein Allows for Proton Translocation via Fatty Acid Cycling Mechanism

Large‐scale identification of leaf senescence‐associated genes

Temperate and boreal forest tree phenology: from organ-scale processes to terrestrial ecosystem models

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