SAM procambium and phyllotaxy

SAM niche Organising centre associated cells slemcells CLV3 CLAVATA 3 Stemcal CLV3, STEM CLV1&2 CLV3Receptor fate cell. 3 355 WUS -> WOSHEL CLV14CLV2 1 14 & (instead of SAM wox inRAM) HUS 3' 1 CLV3 wus CLV1 stemcellnot stemcellnot CLV3 CLV3 wus 2 CLV3 birds to CLV1 wus, maintained forstem cell no: maintenance

Procambium highsucrose through phloem Initials more phloom high water through xylem Itials morexylem high suciese CLE41&44 WOX4 stem gate cell proliferation PXY/TDRS Procambius CLC41 CLIAH Phloem In arahdosis STM activator of IPT gene committed depof Zealin,syntheds GA P4 STM Po GAD cylolinin contains (CINCE) SAMidentily

Phyllotaxy opp opp decurate spiral Alternate SAM lack auxcin (auxin antagonist of cyfokinin) 8AM - 3ones Central Zone - organizing centre Peripheral Zone Rapidly dividing Ribzone Stem structures d Youngest Primardium P2 CZ P2 block axin to correspond RZ PZ P1 youngest ecapprimentia C2 act as auxingine sinc, No P2 P1 P3 leaf ydevelop AND P2 older than P1 away from auxin P2 flow site altunate enter left peripheral Aox AUX right PZ 2on e receive auxin new PI Po nowpo P1 roauxin since P1 Righ 1 peripheral zone Alternate in getting asuxin