caa a22 4500 467893500 CHVBK 20180406152755.0 cr unu---uuuuu 170328e20060401xx s 000 0 eng 10.1007/s11103-005-1270-y doi (NATIONALLICENCE)springer-10.1007/s11103-005-1270-y Golz John School of Biological Sciences, Monash University, 3800, Clayton, Vic, Australia aut Signalling between the Shoot Apical Meristem and Developing Lateral Organs [Elektronische Daten] [John Golz] A characteristic feature of plant development is the extensive role played by cell-cell signalling in regulating patterns of growth and cell fate. This is particularly apparent in the shoot apical meristem (SAM) where signalling is involved in the maintenance of a central undifferentiated stem cell population and the formation of a regular and predictable pattern of leaves, from the meristem periphery. Although these two functions occur in different regions of the meristem, their activity must be coordinated to maintain meristem integrity. The role of signalling in the SAM was first characterised over 60years ago by elegant surgical experiments. These studies showed that existing leaf primordia determine future sites of organ formation in adjacent regions of the SAM, a finding that laid the foundation for subsequent studies into the mechanisms controlling phyllotaxy. Recent studies have identified auxin as a likely signal promoting organ formation and shown that young primordia play an important role in determining its distribution in the SAM. These pioneering surgical experiments also revealed that signals from the meristem regulate the development of organ primordia. In this case a meristem signal promotes the formation of cell types found in the top/adaxial half of the emerging leaf. While the identity of this signal remains elusive, the recent characterisation of a small family of PHABULOSA-like (PHB-like) transcription factor genes has provided important clues to its nature. These genes, which promote adaxial cell identity, are regulated by microRNAs (miRNAs) raising the exciting possibility that the meristem signal is either a miRNA or part of a pathway regulating the distribution of miRNAs. Springer, 2006 auxin nationallicence cell-cell signalling nationallicence lateral organs polarity nationallicence microsurgery nationallicence miRNA nationallicence organ polarity nationallicence PHABULOSA nationallicence phyllotaxy nationallicence shoot apical meristem nationallicence Plant Molecular Biology Kluwer Academic Publishers 60/6(2006-04-01), 889-903 0167-4412 60:6<889 2006 60 11103 https://doi.org/10.1007/s11103-005-1270-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11103-005-1270-y text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Golz John School of Biological Sciences, Monash University, 3800, Clayton, Vic, Australia aut NATIONALLICENCE 773 0- Plant Molecular Biology Kluwer Academic Publishers 60/6(2006-04-01), 889-903 0167-4412 60:6<889 2006 60 11103 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer