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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2010 Proceedings-SWSS.pdf#page=117
    Last checked: 08/01/2013
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Publication Type:
Author(s):Williams, R. D.; Bartholomew, P. W.
Author Affiliation:USDA-ARS-GRL, Langston University, Langston, OK
Title:Does leaf manipulation affect leaf appearance in Italian ryegrass?
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Meeting Info.:Little Rock, Arkansas: January 25-27, 2010
Source:2010 Proceedings, Southern Weed Science Society. Vol. 63, 2010, p. 67-69.
# of Pages:3
Publishing Information:Champaign, Illinois: Southern Weed Science Society
Keywords:TIC Keywords: Growth rate; Lolium multiflorum; Mechanical stress; Morphological evaluation; Seedling stage
Abstract/Contents:"Mechanical stimuli such as rubbing, shaking, or flexing plants can alter their growth rates and morphologies. Plant response to mechanical stress can result in delayed plant growth, reduced leaf size, shortened and thickened stems, and reduced yields. Repeated measurements, such as leaf counting or measuring leaf length or area, can also affect plant growth. In earlier field and growth chamber studies leaf and tiller appearance rates were greater in Italian ryegrass (Lolium multiflorum Lam.) seedlings grown in chambers than in the seedlings grown in the field. Differences between the field and chamber studies may be attributed in part to differences in soil moisture, soil bulk density and temperature. However, the effects of mechanical stimulation due to leaf manipulation during counting or of wind disturbance of plants in the field have not been determined. Here we report the results of a growth chamber study where Italian ryegrass seedlings were undisturbed, periodically disturbed by leaf counting, and shaken for 30-min daily in addition to the periodic leaf counting. There was no significant difference in the leaf or tiller appearance or number between the counted and counted plus shaking treatments. Nor was there a significant difference among the treatments as to total, shoot or root dry weights. We conclude that routine manipulation of ryegrass seedlings is unlikely to produce measurable impact on seedling development and growth."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Williams, R. D., and P. W. Bartholomew. 2010. Does leaf manipulation affect leaf appearance in Italian ryegrass?. South. Weed Sci. Soc. Proc. 63:p. 67-69.
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Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2010 Proceedings-SWSS.pdf#page=117
    Last checked: 08/01/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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