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  • Biology
  • Dr. Vollbrecht, of the Department of Genetics, Development, and Cell Biology at Iowa State University, will be presenting this work at a symposium on Maize Biology at the annual meeting of the American Society of Plant Biologists in Mrida, Mexico (June 28, 10:40 AM). (bio-medicine.org)
  • In particular, the root meristem is an excellent system in which to study stem cell biology. (plantcell.org)
  • secondary
  • Xylem cells develop secondary cell walls (SCWs) that form the largest part of plant lignocellulosic biomass that serve as a renewable feedstock for biofuel production. (frontiersin.org)
  • Essential gibberellins activity is found in the primary and secondary meristems-both in shoots and roots-where undifferentiated stem cells are influenced to produce. (maximumyield.com)
  • it divides to produce secondary xylem and secondary phloem (new food- and water-conducting tissues). (encyclopedia.com)
  • The radial growth of woody plants results from the activity of two meristems: the vascular cambium, which gives rise to the xylem (wood) and to the secondary phloem, and the cork cambium or phellogen that produces the phelloderm and phellem (cork), which together constitute the system named periderm. (frontiersin.org)
  • roots
  • Seeds in which this gene failed to work were observed by the CSHL team to give rise to seedlings that barely survived more than two weeks, despite forming intact roots and an intact phloem the main transport artery that carries nutrients and other supplies to the meristems. (bio-medicine.org)
  • The hormone Abscisic Acid (ABA) mediates responses to different environmental factors, such as the presence of nitrate in the soil, water stress and salt, shaping the structure of the root system by regulating the production of lateral roots as well as controlling root elongation by modulating cell division and elongation. (mdpi.com)
  • replenish
  • In addition, in many tissues they serve as a sort of internal repair system, dividing essentially without limit to replenish other cells as long as the person or animal is still alive. (valleyforward.org)
  • auxin
  • They showed that the plant hormone auxin controls the change from cell division to female reproductive development. (eurekalert.org)
  • Auxin is a plant hormone that promotes growth of the stem tip," says Assist. (eurekalert.org)
  • divisions
  • The PLB forms by localized anticlinal divisions (new cell walls perpendicular to the existing cell walls) in the adaxial epidermis. (plantcell.org)
  • Cell divisions associated with the PLB are likely to occur in response to signals that occur earlier in development. (plantcell.org)
  • The corpus is the mass of cells in the central part of the meristem and cell divisions occur in all planes. (iastate.edu)
  • activity
  • In this study, we report on the identification of a novel input into the process of floral stem cell arrest and suggest that this activity is spatially restricted to the centermost region of the AG expression domain. (biologists.org)
  • Furthermore, BAM activity in the meristem depends on CLV2 , which is required in part for CLV1 function. (genetics.org)
  • The activity of vegetative meristems is repetitive , often described as iterative or meristic (from mer meaning unit as in poly mer ). (iastate.edu)
  • Here we show that MP patterning activity is largely dispensable when the presumptive carboxypeptidase ALTERED MERISTEM PROGRAM 1 ( AMP1 ) is not functional, indicating that MP is primarily necessary to counteract AMP1 activity. (biologists.org)
  • Root growth is strongly inhibited by treatments with growth factors, indicating disturbances in the meristem activity. (biologists.org)
  • organ
  • Laser microdissection of sensory organ precursor cells of Drosophila microchaetes. (biomedsearch.com)
  • In Drosophila, each external sensory organ originates from the division of a unique precursor cell (the sensory organ precursor cell or SOP). (biomedsearch.com)
  • Mechanisms
  • It is, however, the integration of the basic cell cycle mechanisms with the developmental program that generates the enormous phenotypic variation among multicellular organisms, a process that is much less understood ( Inze and De Veylder, 2006 ). (biologists.org)
  • growth
  • Cell cycle: the key to plant growth control? (ugent.be)
  • Termination of floral stem cell growth and the beginning of gynoecium development is tightly regulated spatially and temporally. (eurekalert.org)
  • The study gives a roadmap for how CRABS CLAW coordinates the growth termination of the floral stem cells and the development of the gynoecium. (eurekalert.org)
  • This result describes an elegant mechanistic link between floral stem cell growth termination and gynoecium development," says Assist. (eurekalert.org)
  • The experiments have revealed a gene called GAT1 (pronounced gate-one), which instructs cells to produce an enzyme found only in meristems, the stem-cell rich tip of the plant where new growth takes place. (bio-medicine.org)
  • Meristems that are blocked and thereby starved of nutrients won't give rise to daughter cells and spawn new organs, thus stunting the plant's growth," explains Jackson. (bio-medicine.org)
  • In regions where there are alternating seasons, each year's growth laid down by the cambium is discernible because of the contrast between the large wood elements produced in the spring and the smaller ones produced in the summer. (encyclopedia.com)
  • 525 words - 3 pages Stem Cell Research Stem cells have the remarkable potential to develop into many different cell types in the body during early life and growth. (valleyforward.org)
  • stems
  • Trees are externally covered on their stems and branches by the bark that represents 9 to 15% of the stem volume ( Harkin and Rowe, 1971 ). (frontiersin.org)