کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4401116 1307058 2011 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biological flora of Central Europe: Leucojum aestivum L.
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Biological flora of Central Europe: Leucojum aestivum L.
چکیده انگلیسی

Leucojum aestivum L. (Amaryllidaceae) is a polycarpic C-S-European/W-Asiatic geophyte. It is a threatened wetland species and is protected in several European countries, as a consequence of the destruction or alteration of its habitats across Europe and the harvesting of its bulbs for medical purposes (alkaloids). This paper deals with the taxonomic status, morphology, distribution, ecology and population biology of this species, with special emphasis on habitat requirements, reproductive biology, and seed germination. A detailed study in N-Italy found that L. aestivum grows on alluvial soils with high nitrogen levels. The mean size of the plants increased with the water content of the soil. Similarly, within the habitats, the water and nitrogen contents of the soil were higher in plots with L. aestivum than in those without the species. Seed set of the plants was not influenced by the size of a population, but strongly increased with the density of flowering plants. This was due to a decrease in the proportion of unfertilised eggs, indicating pollen limitation of reproduction in low-density populations. Germination tests revealed that the optimal germination temperature is between 20 °C and 25 °C.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Perspectives in Plant Ecology, Evolution and Systematics - Volume 13, Issue 4, 20 November 2011, Pages 319–330
نویسندگان
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