Phycomyces: Fine Structure Analysis of the Growing Zone | Zendy

R. Igor Gamow | Zendy; Geoffrey Andrew Geer | Zendy; Bärbel Böttger | Zendy

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Phycomyces: Fine Structure Analysis of the Growing Zone

Author(s) -

R. Igor Gamow,

Geoffrey Andrew Geer,

Bärbel Böttger

Publication year - 1986

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.80.3.721

Subject(s) - phycomyces , elongation , rotation (mathematics) , clockwise , position (finance) , physics , biophysics , function (biology) , trajectory , chemistry , biology , mathematics , geometry , materials science , microbiology and biotechnology , quantum mechanics , finance , economics , metallurgy , ultimate tensile strength

Fine structure analysis of the stage IVb Phycomyces sporangiophore growing zone (GZ) was performed during steady-state growth using a computer-video digitizer and recorder. By simultaneously measuring the trajectory of two independent particles above and within the GZ, we have confirmed the previous findings of R. Cohen and M. Delbrück (1958 J Cell Comp Physiol 52: 361-388) that the GZ is not uniform. We have been unable to confirm their findings that counterclockwise rotation exists in a mature sporangiophore. The rates of rotation and elongation change independently as a function of position in the GZ. This change is not linear as would be expected if the GZ were uniform. The importance of this finding is discussed in terms of the fibril reorientation model.

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