Abstract
Meristems are a somewhat enigmatic concept. Esau (1960) described them as “embryonic tissue zones, the meristems, in which the addition of new cells continues.” Most molecular developmental biologists narrowly adopt a definition of meristems as proliferating tissues that maintain self-renewing stem cells under control of the WUSCHEL-RELATED HOMEOBOX (WOX) gene family. In fact, at least in the Arabidopsis thaliana (L.) Heynh., it is well known that WUSCHEL and WOX5 are expressed in shoot and apical meristems, respectively, and regulate stem cell maintenance. In this sense, the lateral meristem (or cambium tissue) is also a meristem, since WOX4 is known to function in the control of stem cell self-renewal. On the other hand, “meristematic tissues” such as intercalary meristems in leaves or stems are excluded by this definition at present because neither WOX gene expression nor stem cells have been observed in these tissues. Similarly, “meristemoid” is also a complex concept. In a meristemoid lineage, both self renewal and stem cell identity are recognized, but WOX genes are not known to have a role in these cells in A. thaliana. Are meristemoid tissues a form of meritems? The above confusion reveals that the definition of stem cells in plant science is not fully mature. The photographs in this chapter review a range of apical meristems and also a “leaf meristem.”
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Chapter References
Takahashi N, Hashino M, Kami C, Imaichi R (2009) Developmental morphology of strap-shaped gametophytes of Colysis decurrens: a new look at meristem development and function in fern gametophytes. Ann Bot 104:1353–1361
Ichihashi Y, Kawade K, Usami T, Horiguchi G, Takahashi T, Tsukaya H (2011) Key proliferative activity in the junction between the leaf blade and leaf petiole of Arabidopsis. Plant Physiol 157:1151–1162
Truernit E, Bauby H, Dubreucq B, Grandjean O, Runions J, Barthélémy J, Palauqui JC (2008) High-resolution whole-mount imaging of three-dimensional tissue organization and gene expression enables the study of phloem development and structure in Arabidopsis. Plant Cell 20:1494–1503
Kotogány E, Dudits D, Horváth GV, Ayaydin F (2010) A rapid and robust assay for detection of S-phase cell cycle progression in plant cells and tissues by using ethynyl deoxyuridine. Plant Methods 6:5
Groot EP, Doyle JA, Nichol SA, Rost TL (2004) Phylogenetic distribution and evolution of root apical meristem organization in dicotyledonous angiosperms. Int J Plant Sci 165:97–105
Heimsch C, Seago JL Jr (2008) Organization of the root apical meristsem in angiosperms. Am J Bot 95:1–21
Helariutta Y, Fukaki H, Wysocka-Diller J, Nakajima K, Jung J, Sena G, Hauser MT, Benfey PN (2000) The SHORT-ROOT gene controls radial patterning of the Arabidopsis root through radial signaling. Cell 101:555–567. doi:10.1016/S0092-8674(00)80865-X
Nakajima K, Sena G, Nawy T, Benfey PN (2001) Intercellular movement of the putative transcription factor SHR in root patterning. Nature 413:307–311. doi:10.1038/35095061
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2014 Springer Japan
About this chapter
Cite this chapter
Tsukaya, H. (2014). Meristems. In: Noguchi, T., et al. Atlas of Plant Cell Structure. Springer, Tokyo. https://doi.org/10.1007/978-4-431-54941-3_9
Download citation
DOI: https://doi.org/10.1007/978-4-431-54941-3_9
Published:
Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-54940-6
Online ISBN: 978-4-431-54941-3
eBook Packages: Biomedical and Life SciencesBiomedical and Life Sciences (R0)