Fig. 5

Structure of microtubular roots (a, c) and basal bodies replication (d) in M. ovata, and microtubular roots in Sphaeroeca volvox (b). a, b Transversal section of FB at its proximal end with MTOCs and radiating microtubules. Arrows show the electron dense interstitial material, arrowheads—two separate MTOCs. c Longitudinal section of flagellar apparatus showing the fibrillar root (arrowheads) associated with membrane sac (s). d Longitudinal section of flagellar apparatus prior cell division, showing nascent basal bodies (arrows). fbr fibrillar bridge interconnecting basal bodies, nfk non-flagellar basal body, nu nucleolus, a, c after: [11]; b after: [6]. Scale bars a, b 200 nm; C, D 500 nm