Full TGIF Record # 962
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Publication Type:
Author(s):Sifers, S. I.; Beard, J. B.
Author Affiliation:Research Assistant-Turfgrass Physiology and Professor-Turfgrass Physiology and Management, The Texas Agricultural Experiment Station, Department of Soil and Crop Sciences, College Station, Texas
Title:Spring root decline induction studies
Section:Growth and development
Other records with the "Growth and development" Section
Source:Texas Turfgrass Research - 1984. May 1984, p. 8-14.
# of Pages:7
Publishing Information:College Station, TX: Texas Agricultural Experiment Station.
Series:Consolidated PR 4269-4289
Keywords:TIC Keywords: Root initiation; Spring root decline; Stenotaphrum secundatum; Cynodon; Roots
Abstract/Contents:A study was conducted at the Texas Agricultural Experiment Station in 1983 on spring root decline on sods of Tifgreen bermudagrass (Cynodon spp.) and Stenotaphrum secondatum. After two months of root acclimation each spieces was placed in a growth chamber for a two month period at 42 °F (5 °C) to simulate dormancy. They were then transferred to a second growth chamber at a temperature of 92 °F (33 ° C). In a related study conducted in the fall of 1983 the same procedures were taken as previously decribed, but when transferring to the higher temperature chamber a split treatment was used involving 90 °F (32 ° C) and 75 °F (24 ° C). Results in study I showed the roots maintaining a white, healthy condition throughout the low temperature phase. However, when the plants were transferred to the high temperature phase no new root growth was initiated from the tips of existing roots after new green shoot initiation. The existing roots turned brown between two and six days after green-up. All new root growth arose from meristematic areas in the crowns, and the nodes on lateral stems near the soil surface. In study II, the same problems were encountered in the high temperature phase. At the lower 75 °F (24 °C) temperature, however, only slight root discoloration occurred and new root growth arose from the tips of existing roots. Thus, higher temperatures at the time of new shoot green-up may induce the occurrence of spring root decline.
Note:Pictures, b/w
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sifers, S. I., and J. B. Beard. 1984. Spring root decline induction studies. Tex Turfgrass Res. p. 8-14.
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