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Ripoll JJ, Zhu M, Brocke S, Hon CT, Yanofsky MF, Boudaoud A, Roeder AHK. Growth dynamics of the Arabidopsis fruit is mediated by cell expansion. Proc Natl Acad Sci U S A 2019; 116:25333-25342. [PMID: 31757847 PMCID: PMC6911193 DOI: 10.1073/pnas.1914096116] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Fruit have evolved a sophisticated tissue and cellular architecture to secure plant reproductive success. Postfertilization growth is perhaps the most dramatic event during fruit morphogenesis. Several studies have proposed that fertilized ovules and developing seeds initiate signaling cascades to coordinate and promote the growth of the accompanying fruit tissues. This dynamic process allows the fruit to conspicuously increase its size and acquire its final shape and means for seed dispersal. All these features are key for plant survival and crop yield. Despite its importance, we lack a high-resolution spatiotemporal map of how postfertilization fruit growth proceeds at the cellular level. In this study, we have combined live imaging, mutant backgrounds in which fertilization can be controlled, and computational modeling to monitor and predict postfertilization fruit growth in Arabidopsis We have uncovered that, unlike leaves, sepals, or roots, fruit do not exhibit a spatial separation of cell division and expansion domains; instead, there is a separation into temporal stages with fertilization as the trigger for transitioning to cell expansion, which drives postfertilization fruit growth. We quantified the coordination between fertilization and fruit growth by imaging no transmitting tract (ntt) mutants, in which fertilization fails in the bottom half of the fruit. By combining our experimental data with computational modeling, we delineated the mobility properties of the seed-derived signaling cascades promoting growth in the fruit. Our study provides the basis for generating a comprehensive understanding of the molecular and cellular mechanisms governing fruit growth and shape.
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Affiliation(s)
- Juan-José Ripoll
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA 92093-0116;
- Tata Institute for Genetics and Society, University of California, San Diego, La Jolla, CA 92093-0116
| | - Mingyuan Zhu
- School of Integrative Plant Science, Section of Plant Biology, Cornell University, Ithaca, NY 14853
- Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853
| | - Stephanie Brocke
- School of Integrative Plant Science, Section of Plant Biology, Cornell University, Ithaca, NY 14853
- Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853
| | - Cindy T Hon
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA 92093-0116
| | - Martin F Yanofsky
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA 92093-0116
- Tata Institute for Genetics and Society, University of California, San Diego, La Jolla, CA 92093-0116
| | - Arezki Boudaoud
- Laboratoire Reproduction et Développement des Plantes, Université de Lyon, École Normale Supérieur de Lyon, Claud Bernard University Lyon 1, CNRS, Institut National de la Recherche Agronomique, F-69342 Lyon, France
| | - Adrienne H K Roeder
- School of Integrative Plant Science, Section of Plant Biology, Cornell University, Ithaca, NY 14853;
- Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853
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José Ripoll J, Bailey LJ, Mai QA, Wu SL, Hon CT, Chapman EJ, Ditta GS, Estelle M, Yanofsky MF. microRNA regulation of fruit growth. Nat Plants 2015; 1:15036. [PMID: 27247036 DOI: 10.1038/nplants.2015.36] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 02/26/2015] [Indexed: 05/04/2023]
Abstract
Growth is a major factor in plant organ morphogenesis and is influenced by exogenous and endogenous signals including hormones. Although recent studies have identified regulatory pathways for the control of growth during vegetative development, there is little mechanistic understanding of how growth is controlled during the reproductive phase. Using Arabidopsis fruit morphogenesis as a platform for our studies, we show that the microRNA miR172 is critical for fruit growth, as the growth of fruit is blocked when miR172 activity is compromised. Furthermore, our data are consistent with the FRUITFULL (FUL) MADS-domain protein and Auxin Response Factors (ARFs) directly activating the expression of a miR172-encoding gene to promote fruit valve growth. We have also revealed that MADS-domain (such as FUL) and ARF proteins directly associate in planta. This study defines a novel and conserved microRNA-dependent regulatory module integrating developmental and hormone signalling pathways in the control of plant growth.
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Affiliation(s)
- Juan José Ripoll
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, California 92093-0116, USA
| | - Lindsay J Bailey
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, California 92093-0116, USA
| | - Quynh-Anh Mai
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, California 92093-0116, USA
| | - Scott L Wu
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, California 92093-0116, USA
| | - Cindy T Hon
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, California 92093-0116, USA
| | - Elisabeth J Chapman
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, California 92093-0116, USA
| | - Gary S Ditta
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, California 92093-0116, USA
| | - Mark Estelle
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, California 92093-0116, USA
- Howard Hughes Medical Institute, University of California San Diego, La Jolla, California 92093, USA
| | - Martin F Yanofsky
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, California 92093-0116, USA
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Strong TV, Smit LS, Turpin SV, Cole JL, Hon CT, Markiewicz D, Petty TL, Craig MW, Rosenow EC, Tsui LC. Cystic fibrosis gene mutation in two sisters with mild disease and normal sweat electrolyte levels. N Engl J Med 1991; 325:1630-4. [PMID: 1944451 DOI: 10.1056/nejm199112053252307] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- T V Strong
- Howard Hughes Medical Institute, Ann Arbor, MI 48109-0650
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Schoumacher RA, Ram J, Iannuzzi MC, Bradbury NA, Wallace RW, Hon CT, Kelly DR, Schmid SM, Gelder FB, Rado TA. A cystic fibrosis pancreatic adenocarcinoma cell line. Proc Natl Acad Sci U S A 1990; 87:4012-6. [PMID: 1692630 PMCID: PMC54034 DOI: 10.1073/pnas.87.10.4012] [Citation(s) in RCA: 186] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
We established a pancreatic adenocarcinoma cell line (CFPAC-1) from a patient with cystic fibrosis (CF) and assessed some of its properties. The cells show epithelial morphology and express cytokeratin and oncofetal antigens characteristic of pancreatic duct cells. Basal and stimulated levels of cAMP and cAMP-dependent protein kinase and the biophysical properties of single Cl- channels in CFPAC-1 are similar to those of airway and sweat gland primary cultures and Cl(-)-secreting epithelial cell lines. Anion transport and single Cl- channel activity was stimulated by Ca2+ ionophores but not by forskolin, cAMP analogs, or phosphodiesterase inhibitors. The cells express the CF gene and manifest the most common CF mutation, deletion of three nucleotides resulting in a phenylalanine-508 deletion. These properties have been stable through greater than 80 passages (24 months), suggesting that CFPAC-1 can serve as a continuous cell line that displays the CF defect.
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Affiliation(s)
- R A Schoumacher
- Gregory Fleming James Cystic Fibrosis Research Center, University of Alabama, Birmingham 35294
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