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  • initiation
  • Occasionally, in weak stm alleles, adventitious shoots will form but the shoots progressively lose their meristem indicating that STM is required for both the initiation and maintenance of SAMs. (iastate.edu)
  • plant
  • Stamens are the male reproductive structure of flowers and their function is to produce pollen grains, which house male gametes, and to release them at flower opening to allow plant reproduction. (frontiersin.org)
  • In plants that normally produce a relatively fixed number of nodes, if the meristem is removed and allowed to reform a plant in culture, the plant will have the normal number of nodes. (iastate.edu)
  • Thus node number is a property of the whole plant and not intrinsic to the meristem. (iastate.edu)
  • Since the main apical meristem is now missing, there is not as much auxin traveling downward through the plant. (grasscity.com)
  • D, Type II plant showing excessive branching and proliferation of floral meristems. (plantphysiol.org)
  • a region of a plant in which active cell division (MITOSIS) occurs, the cells of the meristem not being differentiated into a specialist form. (thefreedictionary.com)
  • elongation
  • RGFR1 and RGFR2 are predominantly expressed in the proximal meristem including the elongation zone and gradually decrease in expression towards the differentiation zone. (thefreedictionary.com)
  • Leaf
  • The terminal leaflet (TL) on leaves 3 and 4 is shown producing lobes (white arrowheads), which occurred in acropetal succession on the terminal leaflet of leaf 4. (plantphysiol.org)
  • 1997
  • 1997 ). This means that, following a manipulation stimulus, seedlings are able to register and store "meristem-production" information but that they require a transient depletion of calcium to allow them to make use of the stored information-to recall it-for the actual induction of meristems. (springer.com)
  • mutations
  • Carpenter, R., and Coen, E. S. (1990) Floral homeotic mutations produced by transposon-mutagenesis n Antirrhinum majus . (springer.com)
  • Most cultivated tomatoes produce inflorescences with a few flowers arranged in a zigzag branching pattern ( Fig. 1 A - E ), but we previously showed that variants with highly branched inflorescences bearing hundreds of flowers arose more than a century ago due to loss-of-function mutations in a homeobox transcription factor encoded by the COMPOUND INFLORESCENCE ( S ) gene ( Fig. 1 G ) ( 10 ). (pnas.org)
  • primary
  • Each rRNA gene can be transcribed within the nucleolus by RNA polymerase I to produce a primary transcript that is processed to form the 18S, 5.8S, and 25-27S rRNAs (the size depends on species). (pnas.org)
  • occur
  • The corpus is the mass of cells in the central part of the meristem and cell divisions occur in all planes. (iastate.edu)
  • mitosis
  • Because most genetic mistakes are generated during mitosis, this is probably a mechanism to minimize the occurrence of genetic mistakes in the permanent cell population of the meristem. (iastate.edu)
  • induction
  • 1991 ). Subsequently, a more convenient experimental system has been developed based on the "induction of meristem production" in the hypocotyl of flax seedlings (Verdus et al. (springer.com)
  • form
  • Flax seedlings grown in the absence of environmental stimuli, stresses and injuries do not form epidermal meristems in their hypocotyls. (springer.com)
  • Such meristems do form when the stimuli are combined with a transient depletion of calcium. (springer.com)
  • activity
  • 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)