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GRAVITROPISM IN ABSCISIC‐ACID DEFICIENT SEEDLINGS OF ZEA MAYS
Author(s) -
Moore Randy,
Smith J. D.,
Fong Franklin
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.tb08384.x
Subject(s) - fluridone , abscisic acid , gravitropism , zea mays , biology , carotenoid , botany , cultivar , mutant , agronomy , arabidopsis , biochemistry , gene
We did not detect any abscisic acid (ABA) in roots or leaves of carotenoid‐deficient mutants of Zea mays . Similarly, we did not detect any ABA in roots or leaves of seedlings treated with Fluridone (an inhibitor of carotenogenesis) even after subjecting them to polyethylene glycol (PEG)‐induced moisture stress. Primary roots of untreated, Fluridone‐treated, and mutant seedlings were strongly graviresponsive. These results suggest that 1) ABA is not necessary for positive gravitropism by primary roots of these cultivars of Z. mays , and 2) ABA is synthesized via the carotenoid pathway.