Abscission in Coleus: Light and phytohormone control

Zhongyuan Mao, Lyle E. Craker, Dennis R. Decoteau

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Light control of leaf abscission in Coleus (Coleus blumei Benth cv. Ball 2719 Red) appears to be regulated by the quantity of endogenous auxin transported from the leaf blade to the abscission zone. Gas chromatographic-mass spectrophotometric analysis indicated that diffusate collected from leaf tissue treated with red light contained significantly higher levels of auxin than dark and far-red light-treated leaf tissue. In addition, diffusate from red light-treated tissue inhibited abscission of leafless petioles while diffusate from far-red light-treated tissue promoted abcission when compared with diffusate from dark-treated tissue. The effect of red light on abscission could be mimicked by IAA, but not by other phytohormones. An auxin transport inhibitor, 2, 3, 5-triiodobenzoic acid (TIBA), applied either as a lanolin ring around the petiole or vacuum infiltrated into tissue, could completely eliminate any red light effect on abscission. The data are consistent with a phytochrome-mediated light regulation of endogenous auxin level in the leaf which then controls abscission.

Original languageEnglish (US)
Pages (from-to)1273-1277
Number of pages5
JournalJournal of experimental botany
Volume40
Issue number11
DOIs
StatePublished - Nov 1 1989

Fingerprint

Coleus
Plant Growth Regulators
abscission
plant hormones
red light
Light
Indoleacetic Acids
auxins
far-red light
2,3,5-triiodobenzoic acid
Plectranthus scutellarioides
lanolin
leaves
leaf abscission
Lanolin
phytochrome
Phytochrome
petioles
leaf blade
indole acetic acid

All Science Journal Classification (ASJC) codes

  • Physiology
  • Plant Science

Cite this

Mao, Zhongyuan ; Craker, Lyle E. ; Decoteau, Dennis R. / Abscission in Coleus : Light and phytohormone control. In: Journal of experimental botany. 1989 ; Vol. 40, No. 11. pp. 1273-1277.
@article{2cdeddff8fd2420d938f0d23fd5840ed,
title = "Abscission in Coleus: Light and phytohormone control",
abstract = "Light control of leaf abscission in Coleus (Coleus blumei Benth cv. Ball 2719 Red) appears to be regulated by the quantity of endogenous auxin transported from the leaf blade to the abscission zone. Gas chromatographic-mass spectrophotometric analysis indicated that diffusate collected from leaf tissue treated with red light contained significantly higher levels of auxin than dark and far-red light-treated leaf tissue. In addition, diffusate from red light-treated tissue inhibited abscission of leafless petioles while diffusate from far-red light-treated tissue promoted abcission when compared with diffusate from dark-treated tissue. The effect of red light on abscission could be mimicked by IAA, but not by other phytohormones. An auxin transport inhibitor, 2, 3, 5-triiodobenzoic acid (TIBA), applied either as a lanolin ring around the petiole or vacuum infiltrated into tissue, could completely eliminate any red light effect on abscission. The data are consistent with a phytochrome-mediated light regulation of endogenous auxin level in the leaf which then controls abscission.",
author = "Zhongyuan Mao and Craker, {Lyle E.} and Decoteau, {Dennis R.}",
year = "1989",
month = "11",
day = "1",
doi = "10.1093/jxb/40.11.1273",
language = "English (US)",
volume = "40",
pages = "1273--1277",
journal = "Journal of Experimental Botany",
issn = "0022-0957",
publisher = "Oxford University Press",
number = "11",

}

Abscission in Coleus : Light and phytohormone control. / Mao, Zhongyuan; Craker, Lyle E.; Decoteau, Dennis R.

In: Journal of experimental botany, Vol. 40, No. 11, 01.11.1989, p. 1273-1277.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Abscission in Coleus

T2 - Light and phytohormone control

AU - Mao, Zhongyuan

AU - Craker, Lyle E.

AU - Decoteau, Dennis R.

PY - 1989/11/1

Y1 - 1989/11/1

N2 - Light control of leaf abscission in Coleus (Coleus blumei Benth cv. Ball 2719 Red) appears to be regulated by the quantity of endogenous auxin transported from the leaf blade to the abscission zone. Gas chromatographic-mass spectrophotometric analysis indicated that diffusate collected from leaf tissue treated with red light contained significantly higher levels of auxin than dark and far-red light-treated leaf tissue. In addition, diffusate from red light-treated tissue inhibited abscission of leafless petioles while diffusate from far-red light-treated tissue promoted abcission when compared with diffusate from dark-treated tissue. The effect of red light on abscission could be mimicked by IAA, but not by other phytohormones. An auxin transport inhibitor, 2, 3, 5-triiodobenzoic acid (TIBA), applied either as a lanolin ring around the petiole or vacuum infiltrated into tissue, could completely eliminate any red light effect on abscission. The data are consistent with a phytochrome-mediated light regulation of endogenous auxin level in the leaf which then controls abscission.

AB - Light control of leaf abscission in Coleus (Coleus blumei Benth cv. Ball 2719 Red) appears to be regulated by the quantity of endogenous auxin transported from the leaf blade to the abscission zone. Gas chromatographic-mass spectrophotometric analysis indicated that diffusate collected from leaf tissue treated with red light contained significantly higher levels of auxin than dark and far-red light-treated leaf tissue. In addition, diffusate from red light-treated tissue inhibited abscission of leafless petioles while diffusate from far-red light-treated tissue promoted abcission when compared with diffusate from dark-treated tissue. The effect of red light on abscission could be mimicked by IAA, but not by other phytohormones. An auxin transport inhibitor, 2, 3, 5-triiodobenzoic acid (TIBA), applied either as a lanolin ring around the petiole or vacuum infiltrated into tissue, could completely eliminate any red light effect on abscission. The data are consistent with a phytochrome-mediated light regulation of endogenous auxin level in the leaf which then controls abscission.

UR - http://www.scopus.com/inward/record.url?scp=0004418977&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0004418977&partnerID=8YFLogxK

U2 - 10.1093/jxb/40.11.1273

DO - 10.1093/jxb/40.11.1273

M3 - Article

AN - SCOPUS:0004418977

VL - 40

SP - 1273

EP - 1277

JO - Journal of Experimental Botany

JF - Journal of Experimental Botany

SN - 0022-0957

IS - 11

ER -