In this study I analyzed dynamic of ramet number on 18 half-sib and 63 full-sib families of rhizomatous perennial herb Iris pumila originating from two Deliblato Sand populations and grown in two nutrient levels (full strength and 1/10 of full strength Hoagland solution). Contrary to most studies dealing with response to different nutrient availability, I failed to detect significant mean nutrient level effect on dynamic of module emergence. Such absence of consistent response to tenfold variation in solution strength indicate that I. pumila have low saturation rates of nutrient uptake and presumably experienced both utilized nutrition levels as rich ones. Genetic variability for plastic response was lacking either. On the other hand, presence of between-population differentiation for the trait itself indicates that I. pumila harbors considerable amounts of within-species genetic variability for ramet dynamics.
Russian Journal of Genetics – Springer Journals
Published: Oct 13, 2004
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