A comparison of chromosome characters in three species of Thymus (Lamiaceae) collected in Russia and Mongolian Altai

Funamoto, Tsuneo; Kondo, Katsuhiko; Smirnov, Sergey V.; Tatarenko, Irina; Motohashi, Tsuyoshi; Damdinsuren, Oyunchimeg

doi:10.3199/iscb.3.1

Cited by 7 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2A, C , E and G). This resting chromosome type is the same type as the other genera in Lamiaceae (eg; Funamoto et al 2008Funamoto et al , 2009Funamoto et al , 2011. The mitotic metaphase chromosomes in four species had commonly small sized chromosomes and monomodal gradations in chromosome length from the longest to the shortest chromosomes, thus formed similar karyotypes to each other except of chromosome numbers and chromosome complements for centromeric positions.…”

Section: Resultsmentioning

confidence: 55%

A comparative study of chromosome characters in four species of Elsholtzia Will. (Lamiaceae) in Japan and China

et al. 2012

Self Cite

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 55%

A comparative study of chromosome characters in four species of Elsholtzia Will. (Lamiaceae) in Japan and China

et al. 2012

Self Cite

View full text Add to dashboard Cite

“…These resting chromosomes type and the mitotic prophase chromosomes type are the same types as the other genera in Lamiaceae (e.g. ;Funamoto 2007;Funamoto and Smirnov 2011;Funamoto et al 2000Funamoto et al , 2008Funamoto et al , 2009. The chromosome numbers of 2n=14 was counted in all samples in the mitotic metaphase cells (Fig.…”

Section: Resultsmentioning

confidence: 69%

Karyomorphology of Perillula reptans Maxim., Lamiaceae, endemic species in Japan

Funamoto

Ogawa

2014

Chromosome Botany

Self Cite

View full text Add to dashboard Cite

Perillula reptans was karyomorphologically studied. This species had the resting chromosomes of the complex chromocenter type, the mitotic prophase chromosomes of the proximal type, and had 2n=14 chromosomes in the mitotic metaphase with basic chromosome number of x=7. The chromosome numbers of this species was reported here for the first time. The chromosome complement showed a gradual (monomodal) gradation in length from the longest (2.8 µm) to the shortest (1.7 µm) chromosomes, and consisted of six submedian-centromeric and eight subterminal-centromeric chromosomes.

show abstract

“…2A, D , F, H and J). This resting nucleus type is the same type as the other genera in Lamiaceae (eg; Funamoto 2007;Funamoto et al 2008Funamoto et al , 2009Funamoto et al , 2011Funamoto et al and 2012. The mitotic metaphase chromosomes in these five taxa had commonly small sized chromosomes and monomodal (gradual) degraded in the chromosome length from the longest to the shortest chromosomes, and thus, formed Mosla japonica (Benth ex Oliv.)…”

Section: Methodsmentioning

confidence: 63%

Comparative karyomorohplogical studies in four species and one variety of Mosla Buch.-Ham. ex Maxim. (Lamiaceae) in Japan

Funamoto

Ogawa

Kariyama³

2014

Chromosome Botany

Self Cite

View full text Add to dashboard Cite

ABSTRACT. Karyomorphology of four species and one variety of Japanese Mosla were observed. They had commonly chromosomal characters at resting nuclei of the complex chromocenter type, and the mitotic metaphase cells showed 2n=36 for M. japonica, 2n=18 for M. chinenis, M. scabra, M. dianthera and M. dianthera var. nana. The chromosome numbers of 2n=18 and 36 were considered diploid and tetraploid, respectively if the basic number x=9 was accepted. The chromosome number of 2n=18 for M. dianthera var. nana was reported here for the first time, and that of the other four species were verified with the previous reports. The karyotypes of five taxa had commonly similar karyomorphology to each other except for chromosome numbers; small sized chromosomes (2.2 to 1.1 µm long), mono-modal (gradual) decrease in chromosome length from the longest to the shortest chromosomes, and consists of median-and submedian-centromeric chromosomes. The genus Mosla Buch.-Ham. ex Maxim. is one of the three genera in the subtribe Perillinae Briq., the family Lamiaceae (Labiatae), consists of about 22 species (Wu and Li 1977b;Li and Hedge 1994), that are commonly annual herbs and aromatic plants, and grow in grassy slopes, forest margins, hills thickets, open hills and stream-sides in temperate regions of India, Southeast Asia and East Asia. Among the species of this genus, 12 species are found in China (Li and Hedge 1994) and four species and one variety grow in Japan (Murata and Yamazaki 1993). KEYWORDS:Seven species (including a synonym) of Mosla have been cytologically studied previously and documented their chromosome numbers as n=9, 2n=18 and 2n=36 (e.g., Sugiura 1931;Suzuka 1953;Mehra and Gill 1968;Gill 1971Gill , 1984Probatova and Sokolovskaya 1986;Sokolovskaya et al. 1986;Zhang and Xu 1988;Hsieh and Huang 1999), and these studies are only chromosome numbers reports. This paper reports detailed karyomorpholoies (the resting nucleus and the mitotic metaphase chromosomes) in the Japanese species of Mosla. MATERIALS AND METHODSSixty-nine plants of four species and one variety of Mosla were collected in 14 localities in Japan ( Fig. 1; Table 1), and cultivated in unglazed plant-pots in shade place in the experimental garden of Showa Pharmaceutical University. Chromosome observations were made in meristematic cells of fresh root tips. They were cut off 5-10 mm long and pretreated in 2 mM 8-hydroxyquinoline at ca 20ºC for 4 h and then fixed in 45% acetic acid at ca 2ºC for 10 min. They were macerated in a mixture of 45% acetic acid and 1N hydrochloric acid (1:1) at ca 60ºC for 20-23 sec and were then stained with 2% aceto-orcein at room temperature in moist chamber with 45% acetic acid for ca 30 min and were prepared by the conventional squash method. The slides were faintly heated under an alcohol frame for 1-2 sec before observation. Measurements of chromosome length were made in each average length in several good metaphase cells.Morphological type of the resting nuclei was classified for Tanaka (1971, 1977), and classifications of mit...

show abstract

A comparison of chromosome characters in three species of Thymus (Lamiaceae) collected in Russia and Mongolian Altai

Cited by 7 publications

References 8 publications

A comparative study of chromosome characters in four species of Elsholtzia Will. (Lamiaceae) in Japan and China

A comparative study of chromosome characters in four species of Elsholtzia Will. (Lamiaceae) in Japan and China

Karyomorphology of Perillula reptans Maxim., Lamiaceae, endemic species in Japan

Comparative karyomorohplogical studies in four species and one variety of Mosla Buch.-Ham. ex Maxim. (Lamiaceae) in Japan

Contact Info

Product

Resources

About