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Morphological Constraints of Shoot Demography of a Clonal Plant: Extra‐ and Intravaginal Tillers of Festuca rubra
Author(s) -
HERBEN TOMÁŠ,
KRAHULEC FRANTIŠEK,
HADINCOVÁ VĚRA,
KOVÁŘOVÁ MARCELA,
SKÁLOVÁ HANA
Publication year - 1994
Publication title -
plant species biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.419
H-Index - 36
eISSN - 1442-1984
pISSN - 0913-557X
DOI - 10.1111/j.1442-1984.1994.tb00100.x
Subject(s) - tiller (botany) , festuca rubra , biology , festuca , agronomy , poaceae
Festuca rubra forms tillers in two different ways: extravaginally and intravaginally. Demography of these two tiller types was observed in seventeen selected tussocks of Festuca rubra s.s. over four growing seasons. Extravaginal tillers were bigger at birth and on the average produced twice as many daughter tillers per tiller. In general, the natality and mortality of extravaginal tillers were less regular than that of intravaginal tillers. Overall tillering rate per tiller was correlated with the density of the surrounding vegetation; mortality, natality and tiller life span were not. High density of the surrounding vegetation did not result in increased formation of extravaginal tillers. The proportion of the extravaginal tillers was not correlated with the density of the F. rubra tussocks. There is no evidence for foraging by extravaginal tillers, but they do act as founders of small clusters of tillers.