Chromosome numbers of Norfolk Island endemic plants

2003 ◽  
Vol 51 (2) ◽  
pp. 211 ◽  
Author(s):  
P. J. de Lange ◽  
B. G. Murray
Keyword(s):  
Chromosome Numbers ◽  
Vascular Plants ◽  
Oceanic Island ◽  
Base Number ◽  
Endemic Plants ◽  
Island Endemic ◽  
Cytological Feature ◽  
Norfolk Island ◽  
The Common ◽  
First Time

Documented chromosome numbers are reported for the first time for 11 (encompassing 11 genera and families) of the 49 endemic vascular plants from Norfolk Island. Confirmatory counts are provided for the endemic Achyranthes arborescens and Rhopalostylis baueri var. baueri. At least 11 of the taxa counted are probable polyploids, supporting the common cytological feature of oceanic island floras. In addition to these new counts, we also infer a base number of x = 5 for the recently reinstated monogeneric Pennantiaceae and query the generic placement of the two arborescent species of Achyranthes, A. arborescens and A. margaretarum.

Chromosome numbers and karyotypes in the Australian Gnaphalieae and Plucheeae (Asteraceae)

1999 ◽  
Vol 12 (6) ◽  
pp. 781 ◽  
Author(s):  
K. Watanabe ◽  
P. S. Short ◽  
T. Denda ◽  
N. Konishi ◽  
M. Ito ◽  
...  
Keyword(s):  
Chromosome Number ◽  
Chromosome Numbers ◽  
Base Number ◽  
Generic Delimitation ◽  
First Time

Chromosome number determinations from 152 collections representing 42 genera and 106 species of the Australian Gnaphalieae and Plucheeae are reported. The chromosome numbers of 75 of these species have not been previously counted or differ from those previously reported for species. Chromosome numbers have been documented for the first time for 14 genera: Argyroglottis (n = 12), Cephalosorus (2n = 24), Decazesia (n = 14), Dielitzia (2n = 26), Eriochlamys (n = 14), Erymophyllum (n = 11 and 14), Gilruthia (n = 13), Leucochrysum (n = 9), Myriocephalus s. str. (n = 14, 2n = 24), Polycalymma s. str. (n = 14), Pterocaulon (n = 10), Pterochaeta (n = 12), Quinetia (2n – 24) and Sondottia (2n = 6). Remaining counts augment and agree with previously reported determinations. Some problems with generic delimitation and interpretation of chromosome data are outlined. There is an array of karyotypes within the Australian Gnaphalieae and dysploidy is widespread. Polyploidy has also played an important role in the evolution of some taxa. Evidence suggests that the base number for Australian Gnaphalieae is x = 14. This may be the base number for the entire tribe.

scholarly journals Chromosome numbers of Polish vascular plants (Part 4)

2014 ◽  
Vol 52 (3-4) ◽  
pp. 205-214 ◽  
Author(s):  
Marta Mizianty ◽  
Zbigniew Mirek ◽  
Ludwik Frey
Keyword(s):  
Chromosome Number ◽  
Chromosome Numbers ◽  
Vascular Plants ◽  
First Time

The authors give results of karyological studies carried out on 20 species of vascular plants from Poland. Most of the results are reported for the first time for this country. The chromosome number of <em>Gnaphalium hoppeanum</em> 2n=28 was established for the first time.

CHROMOSOME NUMBERS OF THE FAMILY CRUCIFERAE. I

1964 ◽  
Vol 42 (11) ◽  
pp. 1509-1520 ◽  
Author(s):  
Gerald A. Mulligan
Keyword(s):  
North America ◽  
Chromosome Numbers ◽  
Base Number ◽  
Thellungiella Salsuginea ◽  
The Family ◽  
Cakile Edentula ◽  
First Time

Chromosome numbers are given for 69 collections of 24 species of Cruciferae in the genera Alyssum, Arabidopsis, Arabis, Barbarea, Cakile, Eutrema, Hali-molobos, Nasturtium, Rorippa, Thellungiella, and Turritis. The following chromosome numbers are reported for the first time: Alyssum desertorum, n = 16; Arabis canadensis, 2n = 14; A. divaricarpa, 2n = 13 + 2B, 14, 20 + 2B, 21, 28; A. drummondii, 2n = 20; A. holboellii, 2n = 13 + 2B, 20 + 2B; A. lemmonii, 2n = 14; A. lyallii, 2n = 21; A. lyrata, 2n = 32; A. pendulocarpa, 2n = 14; Barbarea orthoceras, 2n = 16; Cakile edentula, 2n = 18; Rorippa curvisiliqua, 2n = 16; Thellungiella salsuginea, 2n = 14. It is concluded that species of Arabis native to North America and western Greenland have the base number x = 7 and many of them are apomictic whereas Eurasiatic species of this genus have an x = 8 base number and are sexual.

Chromosome numbers and the taxonomy of North American Agalinis (Scrophulariaceae)

1984 ◽  
Vol 62 (3) ◽  
pp. 454-456 ◽  
Author(s):  
Judith M. Canne
Keyword(s):  
Chromosome Number ◽  
North American ◽  
Chromosome Numbers ◽  
Base Number ◽  
Chromosome Counts ◽  
Base Chromosome Number ◽  
First Time

Chromosome counts are provided for 25 populations representing 18 species of Agalinis Raf. Chromosome numbers are reported for the first time for A. pinetorum, A. laxa, A. acuta, A. gattingeri, and A. skinneriana. The base chromosome number for section Linifoliae, section Heterophyllae, section Purpureae subsections Purpureae and Setaceae, and section Tenuifoliae is established at x = 14. Section Erectae and section Purpureae subsection Pedunculares have a base number of x = 13.

Cytotaxonomy of Chrysopsis and Heterotheca (Compositae-Astereae): a new interpretation of phylogeny

1977 ◽  
Vol 55 (19) ◽  
pp. 2503-2513 ◽  
Author(s):  
John C. Semple
Keyword(s):  
Chromosome Numbers ◽  
Base Number ◽  
New Interpretation ◽  
First Time

The chromosome numbers for 137 populations of 24 species are reported. First reports of n = 5 are given for Chrysopsis decumbens, C. floridana, C. hyssopifolia, C. lanuginosa. C. latisquamea, and C. scabrella and 2n = 18 for C. cruiseana. The occurrence of the diploid 2n = 8 for C. mariana is also reported for the first time. The base number of Heterotheca is x = 9, while the base numbers of Chrysopsis are x = 4 and 5 and.x2 = 9. A realignment of sections included in the two distinct genera is proposed.

CHROMOSOME NUMBERS OF THE FAMILY CRUCIFERAE. II

1965 ◽  
Vol 43 (6) ◽  
pp. 657-668 ◽  
Author(s):  
Gerald A. Mulligan
Keyword(s):  
North American ◽  
Chromosome Numbers ◽  
North American Species ◽  
Base Number ◽  
The Family ◽  
First Time

Chromosome numbers and taxonomic discussions are given for North American material of species in the genera Braya and Cardamine. The following chromosome numbers are reported for the first time: Braya humilis s.l., n = 14 and 2n = 28; Cardamine angulata, n = 20, and 2n = 40; C. cordifolia, 2n = 24; C. microphylla, 2n = 32; C. occidentalis, n = 32 and 2n = 64; C. oligosperma, 2n = 16; C. pensylvanica, 2n = 64; C. umbellata, n = 24 and 2n = 48. It is concluded that the base number of Braya is x = 7 not x = 8 and that North American species of Cardamine have the base numbers x = 6, 8, and 10.

scholarly journals Chromosome numbers for some vascular plants from Mongolia. Post 2

Turczaninowia ◽  
2021 ◽  
Vol 24 (1) ◽  
pp. 145-153
Author(s):  
Elena A. Korolyuk ◽  
Tatyana V. An’kova ◽  
Andrey Yu. Korolyuk
Keyword(s):  
Plant Species ◽  
Chromosome Numbers ◽  
Vascular Plants ◽  
Cirsium Arvense ◽  
Published Data ◽  
Endemic Plant ◽  
Endemic Plant Species ◽  
Rare Endemic ◽  
First Time

Chromosome numbers (2n) for 13 rare, endemic plant species (19 populations) from the families: Asparagaceae, Asteraceae, Boraginaceae, Brassicaceae, Caryophillaceae, Euphorbiaceae, Plantaginaceae – are reported on the material from Mongolia. For Euphorbia potaninii Prokh. (2n = 20), Smelowskia altaica (Pobed.) Botsch. (2n = 14) chromosome complements were examined for the first time. Chromosome numbers of Askellia flexuosa (Ledeb.) W. A. Weber (2n = 42), Cirsium arvense var. vestitum Wimm. et Grab. (2n = 34), Crepis crocea (Lam.) Babc. (2n = 16), Eremogone meyerii (Fenzl) Ikonn. (2n = 44), Heterochroa desertorum Bunge (2n = 34), Plantago komarovii Pavl. (2n= 10, 12), Rhinactinidia eremophila (Bunge) Novopokr. ex Botsch. (2n = 36) were determined from Mongolia for the first time. New cytotypes for Anoplocaryum compressum (Turcz.) Ledeb. (2х) and Eremogone meyerii (4x) were studied. For the species of Plantago komarovii, the phenomenon of aneuploidy (2x = 10) was described for the first time. For each species the area and published data on karyology are given.

Peculiarities of the juvenile period of the native Chechen genotypes of willow leaf pear (Pyrus salicifolia Pall.)

2020 ◽  
Vol 62 ◽  
pp. 32-38
Author(s):  
E. A. Dolmatov ◽  
R. B. Borzayev ◽  
A. N. Shaipov
Keyword(s):  
Chestnut Soil ◽  
Crop Breeding ◽  
Juvenile Period ◽  
Period 2 ◽  
Russian Research Institute ◽  
The Common ◽  
One Year ◽  
First Time ◽  
Selection Of ◽  
Creative Cooperation

The results of the study of the duration of the juvenile period of indigenous Chechen willow leaf pear genotypes (Pyrus salicifolia Pall.) are given in connection with the acceleration of the breeding process and the use of selected forms in pear breeding for high precocity. The studies were carried out in 2016-2019 at OOO “Orchards of Chechnya” in accordance with the Agreement on creative cooperation with the Russian Research Institute of Fruit Crop Breeding. The work was carried out in accordance with generally accepted programs and methods. The objects of the study were one-year and two-year-old pear seedlings obtained from sowing seeds of selected dwarf and low-growing local Chechen forms of willow pear (P. salicifolia Pall.), laying fruit buds on annual growths and seedlings of Caucasian pear (P. caucasica Fed.), 20 500 pcs. of each specie. The aim of the research was to study the potential of precocity of willow pear seedlings and to reveal of selected forms with the greatest degree of this trait. Stratified seeds were sown in the sowing department of the OOO “Orchards of Chechnya” production nursery in April, 2017. The seedlings were grown according to the common technology in dryland conditions on the plot with chestnut soil. The first fl owering of plants was noted in the spring, 2019. As a result of the research, for the first time on a large number of the experimental material it was found that in the off spring of the indigenous Chechen willow leaf pear genotypes, the selection of a little more than 2% of seedlings with a very short juvenile period (2 years) was possible. They are of great interest in accelerating the breeding process and in the selection of new pear varieties with high precocity. 20 willow leaf pear genotypes were selected for the further use in breeding for high precocity and as sources of the trait of short juvenile period.

Mapping the Heart

2010 ◽  
Vol 18 (4) ◽  
pp. 6-8
Author(s):  
Stephen W. Carmichael
Keyword(s):  
Cyclic Adenosine Monophosphate ◽  
Adenosine Monophosphate ◽  
G Protein Coupled Receptors ◽  
Receptor Subtypes ◽  
Cardiac Muscle Cells ◽  
Guanine Nucleotide Binding Protein ◽  
The Common ◽  
Guanine Nucleotide Binding ◽  
First Time ◽  
G Protein Coupled

Some of the receptors on the surface of cardiac muscle cells (cardiomyocytes) mediate the response of these cells to catecholamines by causing the production of the common second messenger cyclic adenosine monophosphate (cAMP). An example of such receptors are the β1- and β2-adrenergic receptors (βARs) that are heterotrimeric guanine nucleotide-binding protein (G protein)-coupled receptors. Selective stimulation of these two receptor subtypes leads to distinct physiological and pathophysiological responses, but their precise location on the surface of cardiomyocytes has not been correlated with these responses. In an ingenious combination of techniques, Viacheslav Nikolaev, Alexey Moshkov, Alexander Lyon, Michele Miragoli, Pavel Novak, Helen Paur, Martin Lohse, Yuri Korchev, Sian Harding, and Julia Gorelik have mapped the function of these receptors for the first time.

scholarly journals Śaivism after the Śaiva Age: Continuities in the Scriptural Corpus of the Vīramāheśvaras

Religions ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 222
Author(s):  
Elaine M. Fisher
Keyword(s):  
Thirteenth Century ◽  
Common Assumption ◽  
Academic Practice ◽  
The Common ◽  
Popular Work ◽  
First Time

This article makes the case that Vīraśaivism emerged in direct textual continuity with the tantric traditions of the Śaiva Age. In academic practice up through the present day, the study of Śaivism, through Sanskrit sources, and bhakti Hinduism, through the vernacular, are generally treated as distinct disciplines and objects of study. As a result, Vīraśaivism has yet to be systematically approached through a philological analysis of its precursors from earlier Śaiva traditions. With this aim in mind, I begin by documenting for the first time that a thirteenth-century Sanskrit work of what I have called the Vīramāheśvara textual corpus, the Somanāthabhāṣya or Vīramāheśvarācārasāroddhārabhāṣya, was most likely authored by Pālkurikĕ Somanātha, best known for his vernacular Telugu Vīraśaiva literature. Second, I outline the indebtedness of the early Sanskrit and Telugu Vīramāheśvara corpus to a popular work of early lay Śaivism, the Śivadharmaśāstra, with particular attention to the concepts of the jaṅgama and the iṣṭaliṅga. That the Vīramāheśvaras borrowed many of their formative concepts and practices directly from the Śivadharmaśāstra and other works of the Śaiva Age, I argue, belies the common assumption that Vīraśaivism originated as a social and religious revolution.

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