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INHIBITION OF GRAVITROPISM IN PRIMARY ROOTS OF ZEA MAYS BY CHLORAMPHENICOL
Author(s) -
Moore Randy
Publication year - 1985
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1985.tb08333.x
Subject(s) - amyloplast , gravitropism , columella , elongation , biology , zea mays , coleoptile , distilled water , botany , germination , root cap , anatomy , agronomy , biochemistry , chemistry , plastid , materials science , chloroplast , chromatography , shoot , arabidopsis , ultimate tensile strength , gene , mutant , meristem , metallurgy , nose
Primary roots of Zea mays seedlings germinated and grown in 0.1 mm chloramphenicol (CMP) were significantly less graviresponsive than primary roots of seedlings germinated and grown in distilled water. Elongation rates of roots treated with CMP were significantly greater than those grown in distilled water. Caps of control and CMP‐treated roots possessed extensive columella tissues comprised of cells containing numerous sedimented amyloplasts. These results indicate that the reduced graviresponsiveness of CMP‐treated roots is not due to reduced rates of elongation, the absence of the presumed gravireceptors (i.e., amyloplasts in columella cells), or reduced amounts of columella tissue. These results are consistent with CMP altering the production and/or transport of effectors that mediate gravitropism.