Timing of growth inhibition following shoot inversion in Pharbitis nil.
Shoot inversion in Pharbitis nil results in the enhancement of ethylene production and in the inhibition of elongation in the growth zone of the inverted shoot.  The initial increase in ethylene production previously was detected within 2 to 2.75 hours after inversion.  In the present study, the initial inhibition of shoot elongation was detected within 1.5 to 4 hours with a weighted mean of 2.4 hours.  Ethylene treatment of upright shoots inhibited elongation in 1.5 hours.  A cause and effect relationship between shoot inversion-enhanced ethylene production and inhibition of elongation cannot be excluded.
Abdel-Rahman
A M
AM
Botany Department, The Ohio State University, Columbus 43210, USA.
Cline
M G
MG
D005030:Ethylenes / Q000096:biosynthesis* / Q000494:pharmacology; D063245:Plant Development; D010937:Plant Growth Regulators / Q000096:biosynthesis* / Q000494:pharmacology; D018520:Plant Shoots / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism; D010944:Plants / Q000187:drug effects / Q000378:metabolism; D013997:Time Factors
D005030:Ethylenes; D010937:Plant Growth Regulators; C036216:ethylene