Editing Phyllotaxis (section)

==Determination==
The pattern of leaves on a plant is ultimately controlled by the accumulation of the plant hormone [[auxin]] in certain areas of the [[meristem]].<ref>{{Cite journal |last1=Reinhardt |first1=Didier |last2=Mandel |first2=Therese |last3=Kuhlemeier |first3=Cris |date=April 2000 |title=Auxin Regulates the Initiation and Radial Position of Plant Lateral Organs |journal=The Plant Cell |language=en |volume=12 |issue=4 |pages=507–518 |doi=10.1105/tpc.12.4.507 |issn=1040-4651 |pmc=139849 |pmid=10760240|bibcode=2000PlanC..12..507R }}</ref><ref>{{cite journal | vauthors = Traas J, Vernoux T | title = The shoot apical meristem: the dynamics of a stable structure | journal = Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences | volume = 357 | issue = 1422 | pages = 737–47 | date = June 2002 | pmid = 12079669 | pmc = 1692983 | doi = 10.1098/rstb.2002.1091 }}</ref> Leaves become initiated in localized areas where auxin concentration is higher.{{Disputed inline|More mechanisms please|date=May 2016}} When a leaf is initiated and begins development, auxin begins to flow towards it, thus depleting auxin from area on the [[meristem]] close to where the leaf was initiated. This gives rise to a self-propagating system that is ultimately controlled by the ebb and flow of auxin in different regions of the [[meristem]]atic [[topography]].<ref>{{Cite journal |last1=Deb |first1=Yamini |last2=Marti |first2=Dominik |last3=Frenz |first3=Martin |last4=Kuhlemeier |first4=Cris |last5=Reinhardt |first5=Didier |date=2015-06-01 |title=Phyllotaxis involves auxin drainage through leaf primordia |journal=Development |language=en |volume=142 |issue=11 |pages=1992–2001 |doi=10.1242/dev.121244 |pmid=25953346 |s2cid=13800404 |issn=1477-9129|doi-access=free }}</ref><ref>{{cite journal | vauthors = Smith RS | title = The role of auxin transport in plant patterning mechanisms | journal = PLOS Biology | volume = 6 | issue = 12 | pages = e323 | date = December 2008 | pmid = 19090623 | pmc = 2602727 | doi = 10.1371/journal.pbio.0060323 | doi-access = free }}</ref>