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  • INFLORESCENCE
  • In the compound inflorescences of tomato and related nightshades (Solanaceae), new lateral inflorescence branches develop on the flanks of older branches that have terminated in flowers through a program of plant growth known as "sympodial. (pnas.org)
  • Variability in the number and organization of sympodial branches produces a remarkable array of inflorescence architectures, but little is known about the mechanisms underlying sympodial growth and branching diversity. (pnas.org)
  • Using hundreds of stage-enriched marker genes that compose this clock, we show that extreme branching, conditioned by loss of expression of the COMPOUND INFLORESCENCE gene, is driven by delaying the maturation of both apical and lateral meristems. (pnas.org)
  • Our systems genetics approach reveals that the program for inflorescence branching is initiated surprisingly early during meristem maturation and that evolutionary diversity in inflorescence architecture is modulated by heterochronic shifts in the acquisition of floral fate. (pnas.org)
  • Diversity in inflorescence architecture is based on two major growth habits. (pnas.org)
  • 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)
  • undergo
  • Unicellular organisms undergo divisions to produce a new biological entity capable of further cell divisions and multicellular algae often have diffuse meristems. (edu.au)
  • 2000 ). SE precursors undergo yet another periclinalcell division, producing two different types of SEs, proto- and meta-phloem SEs. (springer.com)
  • fate
  • In this review we give a comprehensive overview about the function and regulation of specific transcription factors controlling stem cell fate and root apical meristem maintenance and discuss the possibility of TF complex formation, subcellular translocations and cell-to-cell movement functioning as another level of regulation. (frontiersin.org)
  • morphology
  • Surprisingly, we find thousands of age-dependent expression changes, even when there is little change in meristem morphology. (pnas.org)
  • zonation
  • Since 1950, a theory of angiosperm apical zonation developed by French and Belgian botanists has been gaining support. (britannica.com)
  • hypophysis
  • The apical-most suspensor cell, called the hypophysis, becomes incorporated into the embryo proper. (iastate.edu)
  • Both the hypophysis and apical cell derivatives contribute to the formation of the RAM. (iastate.edu)
  • angiosperms
  • Given the wide ranging implications of variation in leaf form, an interesting question is whether the leaf in ancestral angiosperms (and other groups) was simple or compound. (plantphysiol.org)
  • In ferns and angiosperms, the marginal meristem dilates shortly after primordial initiation and fractionates to produces pinnae ( Hagemann, 1984 ). (plantphysiol.org)
  • continuous
  • During longitudinal axis formation, two distinct zones that subsequently retain the capacity for continuous growth are set apart at opposite poles. (edu.au)