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Male gametophyte development and two different DNA classes of pollen grains in Rumex acetosa L., a plant with an XX/XY1Y2 sex chromosome system and a female-biased sex ratio
Female-biased sex ratio is an interesting phenomenon observed in Rumex acetosa, a dioecious plant with an XX/XY1Y2 sex chromosome system. Previous authors have suggested that the biased sex ratio inExpand
The development of onion (Allium cepa L.) Embryo sacs in vitro and gynogenesis induction in relation to flower size
TLDR
In vitro conditions did not disturb meiosis and megagametophyte development in non-degenerated ovules and gynogenic embryos were found after 2 wk of culture, indicating that embryos developed in mature ES exclusively. Expand
The new kenophyte in Poland - Lemna minuta Humb., Bonpl. and Kunth
For the first time in Poland two habitats of Lemna minuta were found in 2007. Both of them are located in the warmest south-western region of the country. L. minuta is a North-American kenophyteExpand
Anatomy of ovary and ovule in dandelions (Taraxacum, Asteraceae)
TLDR
A comparative study of the ovary and especially the ovule anatomy in the diploid dandelion T. linearisquameum and the triploid T. gentile revealed no essential differences, and the role of the thick-walled integumentary layers in the dandelions ovule is discussed. Expand
Influence of irradiated pollen on embryo and endosperm development in kiwifruit
TLDR
Development of seeds following pollination with irradiated pollen was studied in Actinidia deliciosa(kiwifruit) ‘Hayward’ and it was concluded that parthenogenetic embryos represent trihaploids. Expand
Meiotic events in Oenothera - a non-standard pattern of chromosome behaviour.
TLDR
The Rabl-polarized meiotic architecture and clustering of pericentromeres suggest a high complexity of karyotypes, not only in structural heterozygotes but also in bivalent-forming homozygous species. Expand
CHROMOSOME NUMBERS AND STOMATAL CELL LENGTH IN TARAXACUM SECT. PALUSTRIA FROM POLAND
TLDR
The analyzed group of taxa is heterogenous in respect of stomatal size, and after pooling of data the tetraploids show bigger stomata than the triploids. Expand
Ovules anatomy of selected apomictic taxa from Asteraceae family
TLDR
Histological analysis revealed that the prominent thick cell walls were rich in pectins which formed a special storage tissue which, most likely, is an additional source of nutrients necessary for the proper nourishment of a female gametophyte and then of a proembryo. Expand
Embryological study on gynogenesis in onion (Allium cepa L.)
TLDR
It seems likely that the embryos induced in onion are actually induced from ovaries cultured at the immature stage, rather than via gynogenesis by culturing unfertilized flowers, ovaries or ovules. Expand
Insights into developmental processes in anthers, ovaries, and ovules of Taraxacumbelorussicum (Asteraceae-Cichorioideae) using DIC optics
TLDR
The course of embryological processes in the ovules indicated an apomictic mode of reproduction in T. belorussicum, a male-sterile dandelion from Poland, and the features of ovule anatomy and characteristics of a mature female gametophyte corresponded to these described in sexually reproducing dandelions. Expand
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