The path of chromoplast development in fruits and flowers

Maraño, María Rosa; Serra, Esteban; Orellano, Elena G.; Carrillo, Néstor

doi:10.1016/0168-9452(93)90002-h

Cited by 53 publications

(31 citation statements)

References 77 publications

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“…It is possible that different ROS types are involved: in Chrysanthemum spp., H 2 O 2 concentration rose earlier and the increase was associated with flower opening, whereas O 2 .2 only rose later coincident with early senescence (Chakrabarty, et al, 2007). In petals of most species, few active chloroplasts remain by the stage of full bloom; most are converted to chromoplasts (Ljubesi c et al, 1991;Marano et al, 1993). The main sources of ROS production in petals are thus likely to be peroxisomes, mitochondria, and the apoplast.…”

Section: Ros Generation and Scavenging: Spatiotemporal Effectsmentioning

confidence: 99%

Production and Scavenging of Reactive Oxygen Species and Redox Signaling during Leaf and Flower Senescence: Similar But Different

2016

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ORCID IDs: 0000-0003-3830-5857 (H.R.); 0000-0001-6523-6848 (S.M.-B.).Reactive oxygen species (ROS) play a key role in the regulation of many developmental processes, including senescence, and in plant responses to biotic and abiotic stresses. Several mechanisms of ROS generation and scavenging are similar, but others differ between senescing leaves and petals, despite these organs sharing a common evolutionary origin. Photosynthesis-derived ROS, nutrient remobilization, and reversibility of senescence are necessarily distinct features of the progression of senescence in the two organs. Furthermore, recent studies have revealed specific redox signaling processes that act in concert with phytohormones and transcription factors to regulate senescence-associated genes in leaves and petals. Here, we review some of the recent advances in our understanding of the mechanisms underpinning the production and elimination of ROS in these two organs. We focus on unveiling common and differential aspects of redox signaling in leaf and petal senescence, with the aim of linking physiological, biochemical, and molecular processes. We conclude that the spatiotemporal impact of ROS in senescing tissues differs between leaves and flowers, mainly due to the specific functionalities of these organs.

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Section: Ros Generation and Scavenging: Spatiotemporal Effectsmentioning

confidence: 99%

Production and Scavenging of Reactive Oxygen Species and Redox Signaling during Leaf and Flower Senescence: Similar But Different

2016

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“…Chromoplasts can be derived from chloroplasts, proplastids, and other nonphotosynthetic plastids in plants (Marano et al, 1993). Chromoplast differentiation involves complex cellular processes, leading to the formation of the specialized metabolic and sequestering structures .…”

Section: Or Might Exert Its Functional Role Through Protein-protein Imentioning

confidence: 99%

The CauliflowerOrGene Encodes a DnaJ Cysteine-Rich Domain-Containing Protein That Mediates High Levels of β-Carotene Accumulation

et al. 2006

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Despite recent progress in our understanding of carotenogenesis in plants, the mechanisms that govern overall carotenoid accumulation remain largely unknown. The Orange (Or) gene mutation in cauliflower (Brassica oleracea var botrytis) confers the accumulation of high levels of β-carotene in various tissues normally devoid of carotenoids. Using positional cloning, we isolated the gene representing Or and verified it by functional complementation in wild-type cauliflower. Or encodes a plastid-associated protein containing a DnaJ Cys-rich domain. The Or gene mutation is due to the insertion of a long terminal repeat retrotransposon in the Or allele. Or appears to be plant specific and is highly conserved among divergent plant species. Analyses of the gene, the gene product, and the cytological effects of the Or transgene suggest that the functional role of Or is associated with a cellular process that triggers the differentiation of proplastids or other noncolored plastids into chromoplasts for carotenoid accumulation. Moreover, we demonstrate that Or can be used as a novel genetic tool to induce carotenoid accumulation in a major staple food crop. We show here that controlling the formation of chromoplasts is an important mechanism by which carotenoid accumulation is regulated in plants.

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“…However, although highly specialized, chromoplasts carry out a variety of functions, many of them persisting from the chloroplast (Bouvier and Camara, 2007;Egea et al, 2010). The biochemical and structural events during chromoplast differentiation have been reviewed in a number of articles over the last decades (Thomson and Whatley, 1980;Ljubesić et al, 1991;Marano et al, 1993;Camara et al, 1995;Waters and Pyke, 2004;Lopez-Juez, 2007;Egea et al, 2010;Bian et al, 2011).…”

mentioning

confidence: 99%

Proteomic Analysis of Chloroplast-to-Chromoplast Transition in Tomato Reveals Metabolic Shifts Coupled with Disrupted Thylakoid Biogenesis Machinery and Elevated Energy-Production Components

et al. 2012

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A comparative proteomic approach was performed to identify differentially expressed proteins in plastids at three stages of tomato (Solanum lycopersicum) fruit ripening (mature-green, breaker, red). Stringent curation and processing of the data from three independent replicates identified 1,932 proteins among which 1,529 were quantified by spectral counting. The quantification procedures have been subsequently validated by immunoblot analysis of six proteins representative of distinct metabolic or regulatory pathways. Among the main features of the chloroplast-to-chromoplast transition revealed by the study, chromoplastogenesis appears to be associated with major metabolic shifts: (1) strong decrease in abundance of proteins of light reactions (photosynthesis, Calvin cycle, photorespiration) and carbohydrate metabolism (starch synthesis/degradation), mostly between breaker and red stages and (2) increase in terpenoid biosynthesis (including carotenoids) and stress-response proteins (ascorbate-glutathione cycle, abiotic stress, redox, heat shock). These metabolic shifts are preceded by the accumulation of plastid-encoded acetyl Coenzyme A carboxylase D proteins accounting for the generation of a storage matrix that will accumulate carotenoids. Of particular note is the high abundance of proteins involved in providing energy and in metabolites import. Structural differentiation of the chromoplast is characterized by a sharp and continuous decrease of thylakoid proteins whereas envelope and stroma proteins remain remarkably stable. This is coincident with the disruption of the machinery for thylakoids and photosystem biogenesis (vesicular trafficking, provision of material for thylakoid biosynthesis, photosystems assembly) and the loss of the plastid division machinery. Altogether, the data provide new insights on the chromoplast differentiation process while enriching our knowledge of the plant plastid proteome.

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The path of chromoplast development in fruits and flowers

Cited by 53 publications

References 77 publications

Production and Scavenging of Reactive Oxygen Species and Redox Signaling during Leaf and Flower Senescence: Similar But Different

Production and Scavenging of Reactive Oxygen Species and Redox Signaling during Leaf and Flower Senescence: Similar But Different

The CauliflowerOrGene Encodes a DnaJ Cysteine-Rich Domain-Containing Protein That Mediates High Levels of β-Carotene Accumulation

Proteomic Analysis of Chloroplast-to-Chromoplast Transition in Tomato Reveals Metabolic Shifts Coupled with Disrupted Thylakoid Biogenesis Machinery and Elevated Energy-Production Components

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