Effect of 2,4-dichlorophenoxyacetic Acid on the expression of embryogenic program in carrot.
Embryogenesis in a wild carrot cell line, W001C, can start and progress up to the first morphogenetic stage (the globular-stage embryo) in 2,4-dichloropenoxyacetic acid (2,4-D). To clarify the quantitative effect of 2,4-D on this cell line, morphological and biochemical criteria have been used to monitor embryogenesis in the presence of increasing concentrations of 2,4-D. The biochemical criteria are the ability to inactivate cycloheximide and the expression of an embryogenic polypeptide E(1). The results show that 2,4-D can affect embryogenesis in a quantitative manner but never fully suppresses embryogenesis unless it is coupled with high cell density.
Borkird
C
C
Department of Genetics, University of California, Berkeley, Berkeley, California 94720.
Choi
J H
JH
Sung
Z R
ZR