scholarly journals Chromosomal Disturbances during Mitotic Activity of Root Tip Cells in Allium by Certain Commonly Used Antibiotics

2018 ◽  
Vol 10 (2) ◽  
pp. 355-365 ◽  
Author(s):  
Sanjay Kumar
Keyword(s):  
Mitotic Activity ◽  
Root Tip ◽  
Tip Cells ◽  
Root Tip Cells

scholarly journals Effect of triazophos on mitotic activity and chromosomal behavior in root meristems of Allium cepa L.

2010 ◽  
Vol 6 ◽  
pp. 4-7 ◽  
Author(s):  
Archana Pandey ◽  
Shyam R Sakya
Keyword(s):  
Mitotic Activity ◽  
Allium Cepa ◽  
Root Meristem ◽  
Plant Science ◽  
Root Tip ◽  
Allium Cepa L ◽  
Meristematic Region ◽  
Cellular Abnormalities ◽  
Tip Cells ◽  
Root Tip Cells

Effect of triazophos (an organophosphorous insecticide) on mitotic activity and chromosomal behavior in the meristematic region of root tip cells of Allium cepa L. was assessed. The insecticide showed mitotic depression and positive chromo-toxic effects. Abnormalities, such as stickiness, plasmolysed cells, equatorial plate shifting, polar shifting, irregular chromosome arrangement, precocious arms formation, bridge formation, C-metaphase, fragmentation of chromosomes, unequal cytokinesis, diagonal cytokinesis, delayed cytokinesis and formation of binucleated cells, were recorded in the chemically pretreated root meristem. Key-words: chromosomal and cellular abnormalities; cytotoxic effect; mitotic index; phase indices.DOI: 10.3126/botor.v6i0.2903 Botanica Orientalis - Journal of Plant Science (2009) 6: 4-7

INATE AND PHOTO-CONTROLLED MITOTIC RHYTHMS IN ONION ROOT-TIP CELLS

1973 ◽  
Vol 15 (4) ◽  
pp. 667-670 ◽  
Author(s):  
Richard C. Bishop ◽  
Richard M. Klein
Keyword(s):  
Mitotic Activity ◽  
Diurnal Rhythm ◽  
Low Temperatures ◽  
Root Tip ◽  
Fluorescent Light ◽  
Onion Root ◽  
Seed Imbibition ◽  
Tip Cells ◽  
Root Tip Cells ◽  
Red Radiation

A four-peaked diurnal rhythm in mitotic activity of dark-grown onion root-tip cells is initiated upon seed imbibition, damps rapidly and is lost within 5 days. It is abolished by continuous white fluorescent light, by continuous blue, green or red radiation, by low temperatures, high osmotica or anoxia. Photoperiodic light controls the well-known two-peaked persistent rhythm. The nature of the zeitgeber for either the inate or the photoperiodically-controlled rhythms is unknown.

scholarly journals Influence of 3-metoxycarbonylmethylbenzothiazolium bromide on growth and mitotic activity of Vicia sativa L. roots

2014 ◽  
Vol 53 (1) ◽  
pp. 53-57
Author(s):  
Vladimir Sekerka
Keyword(s):  
Mitotic Activity ◽  
Root Tip ◽  
Vicia Sativa ◽  
Tip Cells ◽  
Root Tip Cells

3-Metoxycarbonylmethylbenzothiazolium bromide (MMB) influences the growth of the roots seedlings of Vicia sativa L. It stimulates growth within a broad concentration range of 10<sup>-13</sup>-10<sup>-7</sup> M, but inhibits growth at 10<sup>-3</sup> M and shows similar stimulating and inhibiting effects on the mitotic activity of root tip cells.

Sunlight decreased genotoxicity of azadirachtin on root tip cells of Allium cepa and Eucrosia bicolor

2010 ◽  
Vol 73 (5) ◽  
pp. 949-954 ◽  
Author(s):  
W. Kwankua ◽  
S. Sengsai ◽  
C. Kuleung ◽  
N. Euawong
Keyword(s):  
Allium Cepa ◽  
Root Tip ◽  
Tip Cells ◽  
Root Tip Cells

Salt Stress-induced Programmed Cell Death in Rice Root Tip Cells

2007 ◽  
Vol 49 (4) ◽  
pp. 481-486 ◽  
Author(s):  
Jian-You Li ◽  
Ai-Liang Jiang ◽  
Wei Zhang
Keyword(s):  
Cell Death ◽  
Salt Stress ◽  
Programmed Cell Death ◽  
Rice Root ◽  
Root Tip ◽  
Tip Cells ◽  
Root Tip Cells

Cytological evidence bearing on the origin of the B genome in polyploid wheats

Genome ◽  
1988 ◽  
Vol 30 (1) ◽  
pp. 36-43 ◽  
Author(s):  
K. Kerby ◽  
J. Kuspira
Keyword(s):  
Dna Hybridization ◽  
Triticum Turgidum ◽  
Root Tip ◽  
Cytological Evidence ◽  
B Genome ◽  
Genome Donor ◽  
The One ◽  
Genome Donors ◽  
Tip Cells ◽  
Root Tip Cells

To help elucidate the origin of the B genome in polyploid wheats, karyotypes of Triticum turgidum, Triticum monoccum, and all six purported B genome donors were compared. The analysis utilized a common cytological procedure that employed the most advanced equipment for the measurement of chromosome lengths at metaphase in root tip cells. A comparison of the karyotypes of T. turgidum and T. monococcum permitted the identification of B genome chromosomes of T. turgidum. These consist of two SAT pairs, one ST pair, three SM pairs, and one M pair of homologues. Comparisons of the chromosomes of the B genome of T. turgidum with the karyotypes of the six putative B genome donors showed that only the karyotype of Aegilops searsii was similar to the one deduced for the donor of the B genome in T. turgidum, suggesting that Ae. searsii is, therefore, the most likely donor of the B genome to the polyploid wheats. Support for this conclusion has been derived from geographic, DNA-hybridization, karyotype, morphological, and protein data reported since 1977. Reasons why the B genome donor has not been unequivocally identified are discussed.Key words: phylogeny, karyotypes, Triticum turgidum, Triticum monococcum, B genome, B genome donors.

scholarly journals Squash Preparations of Living Root-Tip Cells

Nature ◽  
1949 ◽  
Vol 164 (4178) ◽  
pp. 930-930 ◽  
Author(s):  
J. CHAYEN
Keyword(s):  
Root Tip ◽  
Living Root ◽  
Tip Cells ◽  
Root Tip Cells
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