Fig. 4From: A phosphoinositide map at the shoot apical meristem in Arabidopsis thalianaLow PI4P and PI(4,5)P2 levels correlate with stem cell maintenance. Signal intensity profile across the diameter of shoot meristems expressing (a, b) pPDF1::mCitrine-PHPLC (n = 18) and (c, d) pPDF1::mCitrine-P4MSidM (n = 18). (a, c absolute value and b, d relative values after normalization by the meristem diameter). The diameter of the pPDF1::mCitrine-PHPLC-depleted domain was equal to 20% of that of the whole meristem with a standard deviation of 0.05; the diameter of the pPDF1::mCitrine-P4MSidM-depleted domain was equal to 57% of that of the whole meristem, with a standard deviation of 0.144. Shoot meristems expressing (e) pPDF1::mCitrine-PHPLC and (f) pPDF1::mCitrine-P4MSiDM in Col-0 (left panel) or clv3-17 (right panel). Note the presence of a few dead cells in the central zone of the meristem at the bottom right panel. Scale bar, 20 μmBack to article page