Andrzej Joachimiak

Andrzej Joachimiak
Jagiellonian University | UJ · Department of Plant Cytology and Embryology

Professor

About

87
Publications
20,230
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842
Citations
Citations since 2016
23 Research Items
364 Citations
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
Additional affiliations
January 1996 - December 2010
Uniwersytet Jagielloński

Publications

Publications (87)
Article
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Haldane’s rule (HR, impairment of fertility and/or viability of interracial hybrids) seems to be one of few generalizations in evolutionary biology. The validity of HR has been confirmed in animals, and more recently in some dioecious plants (Silene and Rumex). Dioecious Rumex hastatulus has two races differing in the sex chromosome system: Texas (...
Article
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The extensive diversity of the tribe Orobancheae, the most species-rich lineage of holoparasitic Orobanchaceae, is concentrated in the Caucasus and Mediterranean regions of the Old World. This extant diversity has inspired hypotheses that these regions are also centres of origin of its key lineages, however the ability to test hypotheses has been l...
Article
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This paper presents the results of research on nuclear DNA polymorphism in six apomictic species of marsh dandelions (Taraxacum sect. Palustria): Taraxacum bavaricum, T. belorussicum, T. brandenburgicum, T. paucilobum, T. subdolum and T. vindobonense. The studies demonstrated the existence of clear genetic differences between species and the existe...
Article
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The translocation hypothesis regarding the origin of the XX/XY1Y2 sex chromosome system was tested with reference to the F1 hybrids between two chromosomal races of Rumex hastatulus. The hybrids derived from reciprocal crossing between the Texas (T) race and the North Carolina (NC) race were investigated for the first time with respect to the meiot...
Article
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The location of 5S and 35S rDNA sequences in chromosomes of four Aconitum subsp. Aconitum species was analyzed after fluorescence in situ hybridization (FISH). Both in diploids (2n = 2x = 16; Aconitum variegatum, A. degenii) and tetraploids (2n = 4× = 32; A. firmum, A. plicatum), rDNA repeats were localized exclusively on the shorter arms of chromo...
Article
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Holoparasitic genera within the family Orobanchaceae are characterized by greatly reduced vegetative organs; therefore, molecular analysis has proved to be a useful tool in solving taxonomic problems in this family. For this purpose, we studied all species of the genera Orobanche and Phelipanche occurring in Central Europe, specifically in Poland,...
Article
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Cuscuta epithymum L. (Convolvulaceae) is native to Europe, western Asia and northern Africa, but occurs almost worldwide, and infects many crops, especially legumes, as well as wild plants. Epiparasites (also called hyperparasites) are parasitic plants that parasites other parasitic plants of a different species. Epiparasitism in world flora is kno...
Article
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Rumex tianschanicus × Rumex patientia is a high-biomass-yielding plant suitable for fuel and biogas production. The protocol of the hybrid sorrel micropropagation was used to study the changes in the photosystem II (PSII) activity as well as to analyse the ultrastructure of the chloroplasts. The lowest effective PSII quantum yield [Y(II)] and an ap...
Article
A new, probably endemic species, Orobanche mlokosiewiczii (Orobanchaceae) is described from Georgia, in the Greater Caucasus. The species grows near waterfalls, on slopes with thermo-hygrophilous subalpine tall herbaceous vegetation, and is exclusively parasitic of another endemic species: Aconitum cymbulatum. It is a graceful whitish or pale white...
Article
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Rumex thyrsiflorus Fingerh. is a dioecious plant with polymorphic sex chromosomes (XX in females, XY1Y2 in males). This species is an interesting plant for study on the structure and function of sex chromosomes, the sex ratio, and is also a valuable source of bioactive constituents. A procedure for the micropropagation of R. thyrsiflorus from hypoc...
Article
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Several parasitic plants are known to have acquired mitochondrial genes via a horizontal transfer from their hosts. However, mitochondrial gene transfer in this direction has not yet been found in the parasite-rich family Orobanchaceae. Based on a phylogenetic analysis of the mitochondrial atp6 gene in selected species of Orobanche s.l., we provide...
Article
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Alhagi maurorum Medik. (syn. A. pseudalhagi (M. Bieb.) Fisch.) (Fabaceae), a thorny shrub commonly called camelthorns or Caspian or Persian Manna, is a species native mainly to temperate and tropical Eurasia and the Middle East. It is an important herb, with diverse uses as Arabian folk medicine, and as a food, mainly a source of sweet Manna, or fo...
Article
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The male-specific DNA markers are very useful in molecular sexing of non-flowering plants and seeds of dioecious species. In this paper we identified ten Y chromosome-specific RAPD primers suitable for identification of male plants in three Cannabaceae species with sex chromosomes (Humulus lupulus, XX/XY; H. japonicus, XX/XY1Y2; Cannabis sativa, XX...
Article
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We report occurrences of Orobanche grenieri (Orobanchaceae) in the Lesser Caucasus in southern Georgia (western Asia), and in Badakhshan in Tajikistan (central Asia). These localities are more than 3000 and 5000 km apart from its previously known distribution areas in Spain and France, respectively. We used morphological evidence as well as nuclear...
Article
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Rumex hastatulus is the North American endemic dioecious plant with heteromorphic sex chromosomes. It is differentiated into two chromosomal races: Texas (T) race characterised by a simple XX/XY sex chromosome system and North Carolina (NC) race with a polymorphic XX/XY1Y2 sex chromosome system. The gross karyotype morphology in NC race resembles t...
Article
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Phleum echinatum Host (2n = 2x = 10) is an annual Mediterranean species which differs from other representatives of the genus Phleum by reduced chromosome number, asymmetric karyotype and unusually high amount of DNA in the genome. Chromosomes of this plant were studied using conventional acetic-orcein staining and fluorescence in situ hybridizatio...
Article
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Although callose occurs during megasporogenesis in most flowering plants, the knowledge about its general function and the mechanisms by which the callose layer is formed in particular places is still not sufficient. The results of previous studies suggest a total lack of callose in the ovules of diplosporous plants in which meiosis is omitted or d...
Article
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Dandelion as a model herbal plant has a wide application in analysis of genetic, molecular background of apomictic reproduction. Taraxacum belorussicum Val. N. Tikhom. is a triploid species belonging to Taraxacum sect. Palustria . As an obligatory apomictic plant it presents attractive experimental material for apomixis and somatic embryogenesis as...
Article
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Rumex acetosa L. (common sorrel) is a dioecious, wind pollinated plant with an XX/XY1Y2 sex chromosome system. Sex-ratio in the populations of dioecious plants is rarely even; generally it is skewed towards one gender. Rumex populations showed female sex-ratio bias at all of the stages of development, but the difference in sex proportion was smalle...
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Article
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The main goal of this study was to determine the number and taxonomic rank of taxa belonging to the complex Leonurus cardiaca agg. in Poland. Based on statistical analysis of selected features, two morphological forms of this plant were distinguished. In order to determine their genetic polymorphism and the relationships between them, the nuclear,...
Article
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Chromosome numbers, mainly for Polish flora, were examined in order to investigate whether such features as chromosome numbers and polyploid frequencies are correlated with a plant’s origin (native vs. alien) and invasiveness. Polyploid frequencies were estimated using three methods: the 11 and 14 thresholds and the 3.5 x value. Comparisons of the...
Article
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Cereals are known to be recalcitrant to the induction of morphogenesis in vitro and the majority of the methods used are callus-mediated and species/genotype-dependent. In the present investigation, a method of morphogenesis induction from immature scutella of selected barley cultivars was used, and particular attention was paid to histology in the...
Article
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WE COMPARED CHROMOSOME NUMBER (CN) VARIATION AMONG VASCULAR FLORAS OF THREE DIFFERENT COUNTRIES WITH INCREASING LATITUDE IN THE BOREAL HEMISPHERE: Italy, Slovakia, Poland. Aim of the study was to verify whether the patterns of CN variation parallel the differences in latitudinal ranges. The three datasets comprised 3426 (Italy), 3493 (Slovakia) and...
Article
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A description of Taraxacum zajacii J. & P. Marciniuk, a new species of T. sect. Palustria in Poland is given. Taraxacum zajacii is a pentaploid (2n = 40). Morphologically, the new species is closest to the T. subalpinum/T. neterophilum group.
Article
Microscopic observations of R. bicolor ovules showed that tetrasporic embryo sacs of Fritillaria type are formed. In the mature female gametophytes modifications in antipodal cell formation and egg apparatus organization were observed, e.g. morphological resemblance was evident of antipode or synergid to the egg cell. In the central cell cytoplasm...
Article
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Sex-ratio bias in seeds of dioecious Rumex species with sex chromosomes is an interesting and still unsettled issue. To resolve gender among seeds of R. acetosa and R. thyrsiflorus (two species with an XX/XY 1Y 2 sex chromosome system), this work applied a PCR-based method involving DNA markers located on Y chromosomes. Both species showed female-b...
Article
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Our survey of data collected in the Chromosome Number Database for Polish angiosperms indicated that the 1,498 species with chromosome counts represent 40% of the total angiosperms (3,719) occurring in Poland, including 1,205 native species (53% of native species) and 194 anthropophytes (56% of anthropophytes). The chromosome numbers are known for...
Chapter
Phleum is a complex genus involving diploid, tetraploid, hexaploid and octoploid forms. The domesticated forms of Phleum pratense, known as Timothy, are usually hexaploid. There is now considerable potential to introgress and to resynthesize new forms using wild relatives from other ploidy levels of the section Phleum using the knowledge gained abo...
Article
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Chromosome numbers are given for the following species of Taraxacum sect. Palustria from Poland: T. paucilobum Hudziok (2n = 24, 25), T. belorussicum Val. N. Tikhom. (2n = 24), T. subdolum Kirschner & S ̌těpánek (2n = 24), T. udum Jordan (2n = 24), T. trilobifolium Hudziok (2n = 24), T. bavaricum Soest (2n = 24), T. portentosum Kirschner & S ̌těpán...
Chapter
The relationship among members of the subgenus Phleum was determined using nuclear ribosomal ITS and chloroplast trnL intron DNA sequences. This subgenus is derived from a progenitor of the diploid Phleum alpinum subsp. rhaeticum. The relationships provide evidence of migration, hybridization, polyploidy and speciation associated with historical gl...
Article
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The subgenus Ceratochloa of the genus Bromus includes a number of closely related allopolyploid forms or species that present a difficult taxonomic problem. The present work combines data concerning chromosome length, heterochromatin distribution and nuclear genome size of different 6x, 8x and 12x accessions in this subgenus. Special attention is p...
Article
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Page 67. September 9–11, 2009, Poznań, Poland POSTERS Rumex acetosa L. isone of the few dioecious species that have sex chromosomes (2n= XX+ 12 in females,2n= XY1Y2+ 12 in males). In vitro culture of R. acetosa cv. ...
Article
CMA/DA/DAPI technique revealed the presence of GC-rich regions in mitotic/meiotic chromosomes and within meiotic collective chromocenters of permanent heterozygote Rhoeo spathacea (2n=12). CMA-bands were detected within some NOR-related chromosome ends and within all twelve pericentromeric regions. It can not be excluded that GC-rich segments assoc...
Article
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— CMA/DA/DAPI technique revealed the presence of GC-rich regions in mitotic/meiotic chromosomes and within meiotic collective chromocenters of permanent heterozygote Rhoeo spathacea (2n = 12). CMA-bands were detected within some NOR-related chromosome ends and within all twelve pericentromeric regions. It can not be excluded that GC-rich segments a...
Article
Full-text available
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 in this species is conditioned not only postzygotically (sex-differential sporophytic mortality) but also prezygotically, because the sex ratio of seeds i...
Article
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Structural alterations in nuclei and chromosomes of cells derived from callus culture of Allium fistulosum have been studied with fluorescent in situ hybridization (FISH) using 5S ribosomal DNA (rDNA), 45S rDNA, and 375-bp repeat probes. A high frequency of chromosome abnormalities was found to be caused by the loss of telomere-located 375-bp repea...
Article
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The chromosomal and molecular PCR-ISSR+RAPD pattern of high-mountain Aconitum sect. Aconitum in the Sudetes and Carpathians were analyzed to test whether the taxon has common markers in these two mountain systems. In the Sudetes the taxon forms an autopolyploid chromosome complex (2n = 32), and allopolyploid in the neighboring Western Carpathians....
Article
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We analysed chromosome lengths, karyotype structure, and nuclear DNA content (flow cytometry) in diploid (2n=20) and triploid (2n=30) European H. lupulus var. lupulus, American H. lupulus var. neomexicanus (2n=20) and Japanese ornamental hop, H. japonicus (F/2n=16; M/2n=17). Diploid female representatives of H. lupulus var. lupulus and H. l. var. n...
Article
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The morphology, karyotype structure and nuclear DNA amount of European and American representatives of alpine cat's-tail Phleum commutatum Gaud. were analysed. The evolutionary relationships within this group of taxa are discussed. It was shown that the American and European tetraploids are both morphologically and karyologically similar to each ot...
Article
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Fluorescence in situ hybridization (FISH) using 25S rDNA, 5S rDNA, and telomere sequences as probes was carried out in the complex permanent heterozygote Rhoeo spathacea. Telomere sites were exclusively terminal. All 10 25S rDNA loci were located distally and appeared transcriptionally active after silver staining. Six distal and 2 interstitial 5S...
Article
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Condensed Y chromosomes in Rumex acetosa L. root-tip nuclei were studied using 5-azaC treatment and immunohistochemical detection of methylated histones. Although Y chromosomes were decondensed within root meristem in vivo, they became condensed and heteropycnotic in roots cultured in vitro. 5-azacytidine (5-azaC) treatment of cultured roots caused...
Conference Paper
Allohexaploid wild oat (Avena fatua L., Poaceae: 2n = 6x = 42) is one of the world's worst weeds. In contrast to other Avena hexaploids its genomic structure has not been well documented. The C-banded karyotype of A. fatua described here in this study is different from those reported in previous studies. It was not possible to recognise C-genome or...
Article
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The morphology of cell nuclei in callus obtained from root-tip meristems of Allium fistulosum L. (Monocotyledoneae, Alliaceae) was analysed. The most interesting phenomena observed in long-term callus culture were the different mechanisms of cell polyploidization, enlargement of telomeric segments of heterochromatin, and extensive chromatin elimina...
Article
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Nucleolar organizer regions were localized by silver staining in Rhoeo spathacea (Swartz) Stearn. Our results strongly suggest that interstitially located lightly stained chromosome segments observed in conventional preparations and interpreted by previous authors as secondary constrictions are depleted of active nucleolus organizing regions. There...
Article
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Mitotic metaphase chromosomes of Silene latifolia (white campion) and Silene dioica (red campion) were studied and no substantial differences between the conventional karyotypes of these two species were detected. The classification of chromosomes into three distinct groups proposed for S. latifolia by Ciupercescu and colleagues was considered and...
Article
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Conventional and C-banding chromosome studies and nuclear DNA estimations were performed on six Bromus species (B. arvensis, 2n = 2x = 14; B. hordeaceus, 2n = 4x = 28; B. carinatus, 2n = 8x = 56; B. willdenowii, 2n = 6x = 42; B. erectus, 2n = 8x = 56; and B. inermis, 2n = 8x = 56) belonging to three subgenera: subg. Bromus, subg. Ceratochloa and su...