Full TGIF Record # 269995
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Web URL(s):https://archive.lib.msu.edu/tic/its/articles/1977sup35.pdf
    Last checked: 03/17/2016
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Publication Type:
Content Type:Abstract or summary only
Author(s):Kaufmann, J. E.; Aldous, D. E.
Author Affiliation:Dept. of Crop and Soil Science, Michigan State University, E. Lansing, Michigan
Title:Whole plant distribution of mineral nutrients as affected by temperatures in two Kentucky bluegrass cultivars
Section:Session 4
Other records with the "Session 4" Section
Meeting Info.:Munich, Germany: July 11-13, 1977
Source:International Turfgrass Society Program: III International Turfgrass Research Conference. 1977, p. 35.
# of Pages:1
Publishing Information:Munich, Germany: [International Turfgrass Society]
Keywords:TIC Keywords: Cultivar evaluation; Dry weight; Growth factors; Growth retardation; Mineral nutrition; Poa pratensis; Temperature response
Cultivar Names:Merion; Nugget
Abstract/Contents:"Poa pratensis L. cultivars 'Merion' and 'Nugget' were established from seed in a greenhouse propagation bed. After 2 months, the seedlings were transferred to pots, allowed to acclimate for two weeks and placed in an environmental growth chamber. Air temperatures in the growth chamber were increased 4 C every two weeks from 22 to 38 C. Root temperatures were controlled at 22 C in half the pots and are referred to as cooler root temperatures (CRT). The other half were allowed to equilibrate with air temperatures which are referred to as warmer root temperatures (WRT). Clippings were removed at weekly intervals from plants grown at 22 to 34 C. After the 38 C period, the plants were separated into verdure, thatch, crowns and roots. The distribution of dry weight, P, K, Ca, Mg, Na, Mn, Fe, Zn, Cu, B, and Al was determined for all plant parts. The data shows significant reductions in Mn, Fe, and Zn content in leaves during periods of increasing temperature. Significant increases in Al, B, Cu, and Na content were found with increasing temperature. However, similar trends are observed when high temperature growth inhibition is partially overcome by CRT treatment. Even though growth and high temperature survival of both cultivars was improved, at CRT compared to WRT, no major shifts in the distribution of mineral nutrients were detected. Roots were found to accumulate proportionally high levels of P, Fe, Cu, and Al., while K, Ca, Na, Mg, and B were at very low levels in the root. Thatch accumulated high levels of all minerals while leaf and verdure tissue exhibited low levels. It has previously been suggested that high temperature growth inhibition is directly controlled by: 1. availability of an energy substrate (carbohydrate reserves), 2. availability of reduced nitrogen (glutamine reserves) or 3. synthesis or action of endogenous growth regulators. The possible methods that mineral nutrition could be involved include toxicity or deficiency of cofactors necessary for enzymatic reactions. From this study it would appear that mineral levels are not involved in a primary or secondary role in the high temperature growth inhibition of cool-season turfgrasses."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kaufmann, J. E., and D. E. Aldous. 1977. Whole plant distribution of mineral nutrients as affected by temperatures in two Kentucky bluegrass cultivars. Int. Turfgrass Soc. Annexe - Tech. Pap. p. 35.
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    Last checked: 03/17/2016
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