Full TGIF Record # 53203
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Web URL(s):https://www.crops.org/publications/cs/pdfs/38/4/CS0380041023
    Last checked: 08/05/2010
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Publication Type:
i
Refereed
Author(s):Fagerness, Matthew James; Penner, Donald
Author Affiliation:Michigan State Univ, Dep. of Crop and Soil Sciences, East Lansing, MI 48824-1325
Title:¹⁴C-trinexpac-ethyl absorption and translocation in Kentucky bluegrass
Section:Turfgrass science
Other records with the "Turfgrass science" Section
Source:Crop Science. Vol. 38, No. 4, July/August 1998, p. 1023-1027.
Publishing Information:Madison, WI: Crop Science Society of America
# of Pages:5
Keywords:TIC Keywords: Poa pratensis; Absorption; Translocation; Growth; Trinexapac-ethyl; Activation; Adjuvants
Abstract/Contents:"Trinexpac-ethyl [4-(cyclopropyl-α-hydroxy-methylene)-3,5-dioxocyclohexa< >necarboxylic acid ethyl ester] is a foliar-applied growth regulator for turfgrass that can reduce mowing frequency, clipping production, and enhance turfgrass color. ¹⁴C-Trinexpac-ethyl was used to evaluate absorption and subsequent ₁⁴C-trinexpac-ethyl translocation in hydroponically grown 'Blacksburg' Kentucky bluegrass (Poa pratensis L.). The magnitude and rate of ¹⁴C trinexapac-ethyl absorption by various organs was as follows: plant base > leaf blade > roots. Plant base, as a morphological description and site of application, refers to the collection of leaf sheaths surrounding the compressed turfgrass stem and the crown of the plant. Over the time period of 0 to 24 h, maximum absorption by the plant base was obtained in 8 h and by the leaf blade in 24 h. Absorption by the roots was negligable. Addition of an activator organosilicone adjuvant, Sylgard 309, significantly enhanced ¹⁴C-trinexapac-ethyl absorption by the leaf blade 1 h after application but did not enhance absorption by the plant base. Of the ¹⁴C-trinexapac-ethyl absorbed by the plant base, over 50% was translocated to the plant foliage after 24 h. Of the ¹⁴C-trinexapac-ethyl absorbed by the leaf blade, one-third was translocated after 24h; the direction of movement was predominantly basipetal. Less than 5% of absorbed ¹⁴C-trinexapac-ethyl from either site was translocated to roots or to rhizomes with daughter plants, explaining the lack of inhibition of lateral turfgrass growth. Combined effects of enhanced leaf blade absorption, basipetal translocation from the plant base of ^D}1⁴C-trinexapac-ethyl helped explain the positive impact of Sylgard 309 on efficacy and rainfastness of trinexapac-ethyl."
Language:English
References:18
Note:Figures
Tables
Penner is listed as corresponding author
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Fagerness, M. J., and D. Penner. 1998. ¹⁴C-trinexpac-ethyl absorption and translocation in Kentucky bluegrass. Crop Sci. 38(4):p. 1023-1027.
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Web URL(s):
https://www.crops.org/publications/cs/pdfs/38/4/CS0380041023
    Last checked: 08/05/2010
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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MSU catalog number: SB 183 .C7
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