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- Title
The effect of temperature and nitrogen level on the morphology of Agropyron repens (L.) Beauv.
- Authors
Rogan, P. G.; Smith, D. L.
- Abstract
The effects of temperature and nitrogen level on the morphology of <em>Agropyron repens</em> (L.) Beauv. were investigated in a factorial experiment involving three temperatures (10°, 15° and 20°C) and three nitrogen levels (15, 120 and 960 ppm N). The main effects on axillary bud outgrowth were found at 15 ppm N and 10°C. At 15 ppm N there was an increase in the frequency of dormant buds in the axils of the coleoptile and leaf 3, and a tendency for the buds in the axils of leaves 1 and 2 to produce rhizomes or rhizometillers instead of tillers. At 10°C there was a high proportion of dormant buds in the coleoptile axil but all buds in higher axils grew out. Both 15 ppm N and 10°C led to the production of relatively fewer secondary rhizomes and tillers. Maximum leaf length was attained at 20°C/120 ppm N, when leaves were 40-50% longer than those at 10°C/15 ppm N. Nitrogen level had little effect on total stem height, but at all nitrogen levels stem height and the height of individual internodes increased with increasing temperature. The size of the shoot apex and the number of leaf primordia borne on it increased with decreasing temperature and increasing nitrogen level.
- Subjects
EFFECT of temperature on plants; WHEATGRASSES; CROPS; PLANT morphology; BUDS; NITROGEN
- Publication
Weed Research, 1975, Vol 15, Issue 2, p93
- ISSN
0043-1737
- Publication type
Article
- DOI
10.1111/j.1365-3180.1975.tb01105.x