Columella (botany)

Zygote fungus sporangium,with columella labelled

Columella(in plants) is an axis of sterile tissue which passes through the center of the spore-case ofmosses.^[1]Infungi,it refers to a centrally vacuolated part of ahypha,bearingspores.The word finds analogous usage inmyxomycetes.^{[citation needed]}Invascular plants,columella tissue helps the roots to perceive gravity. Within columella cells, theamyloplastsandGolgi apparatusorganelles tend to fall to the bottom third of the cell.^[2]

The term columella is also used to refer to story 1 to story 4 (S1 – S4) cells in theroot cap,located apically of thequiescent centre.^{[citation needed]}

References[edit]

^One or more of the preceding sentences incorporates text from a publication now in thepublic domain:Beach, Chandler B., ed. (1914)."Columella".The New Student's Reference Work.Chicago: F. E. Compton and Co.
^Stoker, R.; Moore, R. (1984)."Structure of columella cells in primary and lateral roots of Helianthus annuus (Compositae)".New Phytologist.97(2): 205–212.doi:10.1111/j.1469-8137.1984.tb04123.x.Retrieved24 June2024.

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[1] One or more of the preceding sentences incorporates text from a publication now in thepublic domain:Beach, Chandler B., ed. (1914)."Columella".The New Student's Reference Work.Chicago: F. E. Compton and Co.

[sunflower-2] Stoker, R.; Moore, R. (1984)."Structure of columella cells in primary and lateral roots of Helianthus annuus (Compositae)".New Phytologist.97(2): 205–212.doi:10.1111/j.1469-8137.1984.tb04123.x.Retrieved24 June2024.

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