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Growth of Vernalized and Nonvernalized Creeping Foxtail 1
Author(s) -
Rumburg C. B.,
Siemer E. G.
Publication year - 1976
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1976.0011183x001600020002x
Subject(s) - shoot , biology , foxtail , relative growth rate , horticulture , zoology , dry matter , botany , growth rate , agronomy , mathematics , geometry
Herbage dry matter (HDM) accumulation from artificially vernalized (V) plants of ‘Garrison’ creeping foxtail ( Alopecurus arundinacea Poir.) was greater than nonvernalized (NV) plants during 46 days in a growth chamber at 27/4 C (day/night). Ratio of reproductive to total shoots was 0.075 with V and 0.004 with NV. Stems and sheaths contributed about 50 and 28% of final HDM of V and NV, respectively. Shoot number was similar between V and NV at the start, but new shoots of NV developed at nearly three times the rate of V. This difference, though, was offset by a slightly increased leaf weight and nearly doubled sheath and stem weight of V over NV. Leaves/shoot were 2.0 and 1.5 on day 6 for V and NV, respectively. The V treatment retained about 0.5 leaf per shoot advantage until day 46 when the values for both were about 3.4 leaves/shoot. Mean relative growth rates (RGR) derived from quadratic functions of HDM over time for V and NV were not significantly different. However RGR of V was slightly higher than NV during the period from 6 to 13 days while RGR values from 13 to 46 days were similar for both treatments.