Plant Mitochondria: 1 (Advances in Plant Biology)


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Journal of Plant Physiology

Why is the site of ROS generation important in modulating different outcomes? Producing ROS in different organelles or organelle compartments can rapidly alter redox states, and hence signaling. Different outcomes are dependent on the specific nature of the downstream signaling transduction pathway coupled to a given ROS sensor in any compartment It is not surprising then that PD are differentially regulated in response to differing ROS levels, and hence redox signals, from plastids vs.

Thus, PD are poised to sense the metabolic status of the cell, as modulated by plastid and mitochondrial redox states, facilitating the transport of pertinent molecules and signals among cells to coordinate growth, development, defense, and death. Our data provide strong evidence linking intracellular communication to intercellular transport.

Given their central role in carbon metabolism, sensing and responding to various stresses and pathogens, and numerous secondary metabolic processes, disruption of plastid function may provoke the cell to increase communication with its neighbors as a means to obtain or disperse important metabolites and signaling molecules.

Plant Science

Several exciting questions immediately arise. We identified potential cell wall-modifying genes that may be involved in PD formation and function. Understanding the regulation of such genes may illuminate how the cell integrates signals to regulate intercellular transport. What are the signals involved in ONPS?

Special Issue "Plant Mitochondria"

Greater insights into the role of ROS in regulating intercellular transport will be necessary for understanding how redox state is used to communicate the physiological state of organelles to the nucleus and then to neighboring cells to coordinate growth, development, and defense. Leaves of 4-wk-old N.

Samples for transmission EM were prepared and imaged as described previously Sections 60 nm thick were stained with methanolic uranyl acetate and lead citrate. Briefly, two leaves of 3-wk-old N. Photographs of upper, silenced leaves were taken with a Nikon D60 camera Nikon, Inc. Heterozygous ise and ise A. Siliques containing midtorpedo stage embryos were gently opened with forceps.

WT sibling embryos also were collected and frozen.


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Approximately mutant seeds were collected for each of the three genotypes. Duplicate sets of seeds were collected three times from independent groups of plants grown under identical conditions for a total of 18 samples. One set of each pooled sample was used for microarray studies, and the other was used for quantitative PCR analysis. Fifty microliters of RNA Later Ambion was added to each of the three biological replicates in microcentrifuge tubes, and samples were ground with pestles.

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Arabidopsis GeneChip 1. Robust multiarray averaging was used for normalization of expression values log 2 among replicates and for background correction. All necessary quality control steps, including examination of correlations among samples, were taken.

RNA was extracted from seeds as described for microarray samples. We thank Dr. Julius Lucks for programming assistance and Dr. Marisa Otegui for preparation of embryos for transmission EM. Author contributions: T. This article contains supporting information online at www. NOTE: We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail.

We do not capture any email address. Skip to main content. Organelle—nucleus cross-talk regulates plant intercellular communication via plasmodesmata Tessa M. Burch-Smith , Jacob O. Tessa M. Contributed by Patricia C. Zambryski, October 19, sent for review June 20, Abstract We use Arabidopsis thaliana embryogenesis as a model system for studying intercellular transport via plasmodesmata PD. Gene Expression Analyses in ise1 and ise2 Embryos. General Patterns of Gene Expression. Plastid-Related Gene Expression in ise1 and ise2 Embryos.

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Coordinator: Kempken Frank

Table 1. Table 2.

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IJMS | Special Issue : Plant Mitochondria

Genes Affecting Mitochondrial Function. Organelle-Encoded Transcripts Are Affected in ise1 and ise2. Table 3. Table 4.


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  • Discussion The A. Altered PD Biogenesis in ise1 and ise2 Embryos. Plastids and Mitochondria Are Essential for Embryogenesis. Communication Between Organelles and the Nucleus. Redox in Intercellular Communication. Conclusions Our data provide strong evidence linking intracellular communication to intercellular transport. Materials and Methods Microscopy. Confocal microscopy. Transmission EM. Virus-Induced Gene Silencing. Microarray Hybridization and Data Analysis.

    THE ER CHANGES SHAPE DURING CELL DEVELOPMENT

    Acknowledgments We thank Dr. The authors declare no conflict of interest. See Author Summary on page Protoplasma : 1 — Int Rev Cytol : 93 — OpenUrl PubMed. Protoplasma : 61 — Faulkner C , Maule A Opportunities and successes in the search for plasmodesmal proteins. Protoplasma : 27 — Plant Cell 21 : — Plant J 49 : — Protoplasma : — OpenUrl CrossRef. Plant J 14 : — J Plant Physiol : — Plant J 19 : — Lee JY , et al. Plant Cell 17 : — PLoS Biol 6 : e7. Raffaele S , et al. Fernandez-Calvino L , et al. Development : — Plant Cell 19 : — Stonebloom S , et al.

    Plant Mitochondria: 1 (Advances in Plant Biology) Plant Mitochondria: 1 (Advances in Plant Biology)
    Plant Mitochondria: 1 (Advances in Plant Biology) Plant Mitochondria: 1 (Advances in Plant Biology)
    Plant Mitochondria: 1 (Advances in Plant Biology) Plant Mitochondria: 1 (Advances in Plant Biology)
    Plant Mitochondria: 1 (Advances in Plant Biology) Plant Mitochondria: 1 (Advances in Plant Biology)
    Plant Mitochondria: 1 (Advances in Plant Biology) Plant Mitochondria: 1 (Advances in Plant Biology)

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