We addressed the question of whether Ppt1 is involved in the early events of neurogenesis- namely neural precursor specification and division.
Similar to Arabidopsis, orthologs of genes involved in pollen wall formation (ACOS5, CYP98A3;[ 49, 50]) or in sperm cell specification and division genes (FBL17) [ 51] exhibited an expression enriched in the rose stamen DET sample.
Microtubule (MT) arrays are mechanistic effectors of polarity specification and cell division.
The mechanisms that generate dynamic spatial patterns within proliferating tissues are poorly understood, largely because of difficulties in unravelling interactions between cell specification, polarity, asymmetric division, rearrangements, and growth.
Recent work has shown that the postembryonic central nervous system (CNS) of Drosophila is a suitable experimental model to study the genetic basis of some of these processes, including neural proliferation, cell lineage specification, and asymmetric division of neural progenitor cells, as well as tumourigenesis if these processes are perturbed [reviewed by 1] [3].
Molecular genetic and biochemical studies have identified several genes involved in the regulation of pollen development, specifically those in germ division and sperm specification mainly in Arabidopsis [ 1, 3- 5].
Members of the LIM-homeodomain transcription factor family play critical roles during embryonic development in both vertebrates and invertebrates by controlling processes such as asymmetric cell division, tissue specification and differentiation of specific cell types [reviewed in [ 10]].
Gene ontology revealed that genes involved in nucleosome assembly, cell division, pattern specification, neurotransmission, and general metabolism were increasingly regulated throughout development, consistent with active development.
During development, an organism undergoes many rounds of pattern formation, generating ever-greater complexity with each ensuing round of cell division and specification.
