Reproductive initials, or gonidial initials, are filaments below the cuticle surface of algae and fungi which give rise to the bulbs of spore-producing cells (in fungi, conidiophores).
References
Green, Kathleen J.; Kirk, David L. (1 September 1982). "A revision of the cell lineages recently reported for Volvox carteri embryos" (PDF). Journal of Cell Biology. 94 (3): 741–742. doi:10.1083/jcb.94.3.741. ISSN 0021-9525. OCLC 116454526. PMC 2112210. PMID 7130280. Retrieved 18 October 2023. https://rupress.org/jcb/article-pdf/94/3/741/1640832/741.pdf ↩
"Development of Cladosporium caryigenum in Pecan leaves" (PDF). Phytopathology. Archived from the original (PDF) on 2009-05-15. https://web.archive.org/web/20090515205943/http://www.apsnet.org/phyto/PDFS/1988/Phyto78n08_1104.pdf ↩