Regeneration of Rumex obtusifolius after cutting
2001
Martinkova, Z. | Honek, A. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (Czech Republic))
The time of spring sprouting of fertile shoots in individual plants of Rumex obtusifolius from a population at Prague-RuzynØ varied by more than 30 days. We investigated the effect of this variation on regrowth and reproduction after cutting of rosette leaves and fertile shoots in June or July. The number of plants which regenerated fertile shoots and the number of shoots regenerated per plant increased with the original (before cutting) date of sprouting. In uncut plants, the achenes matured in early August. Although sprouting date between these plants differred by one month, the average date of maturation varied only by about 12 days. Cutting postponed achene maturation by roughly one month and eliminated the significant covariation between sprouting and maturation date. Individual differences in seasonality persisted between years, but cutting advanced sprouting of fertile shoots in the following year. The individual variation in seasonality may vary susceptibility of R. obtusifolius plants to grassland and pasture management regimes.
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