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Title: Effects of growth retardants and fumigations with ozone and sulfur dioxide on growth and flowering of Euphorbia pulcherrima Willd

Abstract

Eight cultivars of poinsettia, Euphorbia pulcherrima Willd., were evaluated for sensitivity to ..cap alpha..-cyclopropyl-..cap alpha.. (4-methoxyphenyl)-5-pyrimidine methanol (ancymidol) and protection from ozone and sulfur dioxide injury afforded by applications of ancymidol and (2-chloroethyl) trimethyl ammonium chloride (chlormequat). Foliar sprays of ancymidol were at least 80 to 500 times and the soil drench 1000 times more active than chlormequat in retarding stem elongation. The diam of the bracts was reduced, but branching increased more on plants treated with ancymidol than on untreated plants. The cv. Annette Hegg (AH) was more sensitive to ozone fumigations than was Eckespoint C-1' (C-1). Sulfur dioxide also caused more injury to AH than to C-1. Ancymidol and chlormequat reduced visible injury induced by ozone and sulfur dioxide.

Authors:
;
Publication Date:
Research Org.:
Dept. of Agriculture, Beltsville, MD
OSTI Identifier:
5003106
Alternate Identifier(s):
OSTI ID: 5003106
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Am. Soc. Hortic. Sci.; (United States); Journal Volume: 98:1
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; 54 ENVIRONMENTAL SCIENCES; ORNAMENTAL PLANTS; SENSITIVITY; OZONE; TOXICITY; PLANT GROWTH; INHIBITION; PLANT GROWTH REGULATORS; BIOLOGICAL EFFECTS; SULFUR DIOXIDE; AIR POLLUTION; COMPARATIVE EVALUATIONS; EXPERIMENTAL DATA; CHALCOGENIDES; DATA; GROWTH; INFORMATION; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PLANTS; POLLUTION; SULFUR COMPOUNDS; SULFUR OXIDES 560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987); 500200 -- Environment, Atmospheric-- Chemicals Monitoring & Transport-- (-1989)

Citation Formats

Cathey, H.M., and Heggestad, H.E. Effects of growth retardants and fumigations with ozone and sulfur dioxide on growth and flowering of Euphorbia pulcherrima Willd. United States: N. p., 1973. Web.
Cathey, H.M., & Heggestad, H.E. Effects of growth retardants and fumigations with ozone and sulfur dioxide on growth and flowering of Euphorbia pulcherrima Willd. United States.
Cathey, H.M., and Heggestad, H.E. Mon . "Effects of growth retardants and fumigations with ozone and sulfur dioxide on growth and flowering of Euphorbia pulcherrima Willd". United States.
@article{osti_5003106,
title = {Effects of growth retardants and fumigations with ozone and sulfur dioxide on growth and flowering of Euphorbia pulcherrima Willd},
author = {Cathey, H.M. and Heggestad, H.E.},
abstractNote = {Eight cultivars of poinsettia, Euphorbia pulcherrima Willd., were evaluated for sensitivity to ..cap alpha..-cyclopropyl-..cap alpha.. (4-methoxyphenyl)-5-pyrimidine methanol (ancymidol) and protection from ozone and sulfur dioxide injury afforded by applications of ancymidol and (2-chloroethyl) trimethyl ammonium chloride (chlormequat). Foliar sprays of ancymidol were at least 80 to 500 times and the soil drench 1000 times more active than chlormequat in retarding stem elongation. The diam of the bracts was reduced, but branching increased more on plants treated with ancymidol than on untreated plants. The cv. Annette Hegg (AH) was more sensitive to ozone fumigations than was Eckespoint C-1' (C-1). Sulfur dioxide also caused more injury to AH than to C-1. Ancymidol and chlormequat reduced visible injury induced by ozone and sulfur dioxide.},
doi = {},
journal = {J. Am. Soc. Hortic. Sci.; (United States)},
number = ,
volume = 98:1,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1973},
month = {Mon Jan 01 00:00:00 EST 1973}
}