Full TGIF Record # 112011
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DOI:10.21273/HORTSCI.40.5.1539
Web URL(s):https://journals.ashs.org/hortsci/view/journals/hortsci/40/5/article-p1539.xml?rskey=0WXQFC
    Last checked: 11/20/2019
    Requires: PDF Reader
Publication Type:
i
Refereed
Author(s):Beasley, Jeffrey S.; Branham, Bruce E.; Ortiz-Ribbing, Loretta M.
Author Affiliation:Beasley and Branham: Department of Natural Resources and Environmental Sciences ; Ortiz-Ribbing: United States Department of Agriculture, Agricultural Research Service, Department of Crop Science, University of Illinois, Urbana, Illinois
Title:Trinexapac-ethyl affects kentucky bluegrass root architecture
Section:Turf management
Other records with the "Turf management" Section
Source:HortScience. Vol. 40, No. 5, August 2005, p. 1539-1542.
# of Pages:4
Publishing Information:Alexandria, VA: American Society for Horticultural Science
Keywords:TIC Keywords: Trinexapac-ethyl; Poa pratensis; Shoot growth; Root growth; Root length; Tillers (vegetative)
Abstract/Contents:"Trinexapac-ethyl (TE) [4-(cyclopropyl-a-hydroxy-methylene)-3 ,5-dioxocyclo-hexanecarboxylic acid ethyl ester] effects on turfgrass root architecture are not known. It has been postulated that PGR application could cause photoassimilate that is normally used for shoot growth to be funneled to root growth. This study evaluated the effects of a single TE application on kentucky bluegrass (KBG) root and shoot growth for seven weeks. Individual KBG plants were grown in a hydroponic system and harvested weekly. At each harvest, tiller height, tiller number, and color ratings were recorded. Estimates of total root length (TRL), root surface area (SA), and average root diameter were measured using the WinRhizo system. Trinexapac-ethyl reduced plant height for 4 weeks followed by a period of postinhibition growth enhancement. Trinexapac-ethyl increased tiller number over the course of the study and slightly enhanced plant color. Trinexapac-ethyl reduced TRL and SA 48% and 46% at 1 week after treatment (WAT) followed by an accelerated growth rate 1 to 4 WAT. Trinexapac-ethyl had no effect on root diameter. On a tiller basis, TE initially reduced TRL and SA 30% and 31%, respectively. Total root length per tiller and root surface area per tiller were reduced by TE treatment, but by 7 WAT, those differences were no longer significant. Initial reductions in TRL and SA per tiller may reduce tiller competitiveness for water and nutrients. Based on data for TRL and SA per tiller, shoot and root growth must be considered in total to fully understand TE effects on plant growth. Field research is needed to corroborate results from hydroponic-studies and examine the effect of various TE rates and multiple applications on turfgrass root and shoot growth."
Language:English
References:24
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Beasley, J. S., B. E. Branham, and L. M. Ortiz-Ribbing. 2005. Trinexapac-ethyl affects kentucky bluegrass root architecture. HortScience. 40(5):p. 1539-1542.
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DOI: 10.21273/HORTSCI.40.5.1539
Web URL(s):
https://journals.ashs.org/hortsci/view/journals/hortsci/40/5/article-p1539.xml?rskey=0WXQFC
    Last checked: 11/20/2019
    Requires: PDF Reader
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MSU catalog number: SB 1 .H64
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