Abnormal cell divisions in leaf primordia caused by the expression of the rice homeobox geneOSH1 lead to altered morphology of leaves in transgenic tobacco

1996 ◽  
Vol 251 (1) ◽  
pp. 13-22
Author(s):  
Y. Sato ◽  
M. Tamaoki ◽  
M. Matsuoka ◽  
T. Murakami ◽  
N. Yamamoto ◽  
...  
Keyword(s):  
Transgenic Tobacco ◽  
Leaf Primordia ◽  
Abnormal Cell ◽  
Cell Divisions

Abnormal cell divisions in leaf primordia caused by the expression of the rice homeobox gene

1996 ◽  
Vol 251 (1) ◽  
pp. 13 ◽  
Author(s):  
Yutaka Sato ◽  
Masanori Tamaoki ◽  
Taka Murakami ◽  
Naoki Yamamoto ◽  
Yuriko Kano-Murakami ◽  
...  
Keyword(s):  
Homeobox Gene ◽  
Leaf Primordia ◽  
Abnormal Cell ◽  
Cell Divisions

The initial protrusion of a leaf primordium can form without concurrent periclinal cell divisions

1971 ◽  
Vol 49 (9) ◽  
pp. 1601-1603 ◽  
Author(s):  
Donald E. Foard
Keyword(s):  
Gamma Rays ◽  
Shoot Apex ◽  
Cell Layer ◽  
Fold Increase ◽  
Leaf Primordia ◽  
Leaf Primordium ◽  
Initial Number ◽  
Wheat Grains ◽  
Cell Divisions ◽  
Number Of Cells

The view that periclinal cell divisions cause the initial protrusion of a leaf primordium may be tested by using ionizing radiation to prevent cell divisions without preventing growth. After receiving 800 krad of gamma rays, wheat grains containing embryos with three leaf primordia produce seedlings in which a fourth protrusion of the shoot apex forms unaccompanied by cell divisions. This protrusion without periclinal divisions occurs in the same phyllotactic position as that of the fourth leaf primordium in which periclinal divisions occur. In addition to proper phyllotactic position, the protrusion without cell divisions is formed by the outermost cell layer, as is the initial protrusion of a typical leaf primordium of wheat; moreover, the initial number of cells involved is the same in both kinds of protrusions. Therefore the fourth protrusion in seedlings from irradiated grain is interpreted as the initial protrusion of a leaf primordium that formed without periclinal cell divisions. Measured along the axis of greatest extension, the protrusions without cell divisions represent about a four- to eight-fold increase over the anticlinal dimension of the surface-cell layer in the embryo. These protrusions do not develop further. The absence of cell divisions limits the extent of primordial growth, but does not prevent its inception. Periclinal cell divisions do not cause the initial protrusion of a leaf primordium.

Centrosome-centriole abnormalities are markers for abnormal cell divisions and cancer in the transgenic adenocarcinoma mouse prostate (TRAMP) model

2000 ◽  
Vol 92 (5) ◽  
pp. 331-340 ◽  
Author(s):  
Heide Schatten ◽  
Allison Wiedemeier ◽  
Meghan Taylor ◽  
Dennis B. Lubahn ◽  
Norman M. Greenberg ◽  
...  
Keyword(s):  
Abnormal Cell ◽  
Cell Divisions ◽  
Mouse Prostate

scholarly journals The sequence of cell divisions in the I tunic layer of Actinidia arguta Planch in light of the development of twin cell complexes

2014 ◽  
Vol 55 (2) ◽  
pp. 171-179 ◽  
Author(s):  
Zofia Puławska
Keyword(s):  
Leaf Primordia ◽  
Cell Complexes ◽  
Actinidia Arguta ◽  
Cell Divisions ◽  
Meristematic Activity ◽  
Mother Cells

In <em>Actinidia arguta</em>, the I tunc layer is formed by four cell complexes which descend from single initials. These initials are positioned in a corner of their complex, around the meristem axis. The meristematic activity of the I tunic layer depends on the formative divisions of the initials; the entire I tunic layer above the youngest leaf primordia is formed during the time the initials undergo only 4-8 divisions. In light of the development of the twin cell complexes. it is impossible for cells to be displaced from the I tunic layer into the meristem. The supposition is set forth that the impermanent. mericlinal sectors on variegated perinclinal chimeras develop due to periclinal cleavages within the subcomplexes which derive from tissue mother cells. Whereas. the cell initials do not undergo periclinal divisions and are not displaced.

Live birth potential of good morphology and vitrified blastocysts presenting abnormal cell divisions

2017 ◽  
Vol 17 (2) ◽  
pp. 144-150 ◽  
Author(s):  
Antonino Azzarello ◽  
Thomas Hoest ◽  
Anders Hay-Schmidt ◽  
Anne Lis Mikkelsen
Keyword(s):  
Live Birth ◽  
Abnormal Cell ◽  
Cell Divisions

scholarly journals Glucose and cholesterol induce abnormal cell divisions via DAF-12 and MPK-1 in C. elegans

Aging ◽  
2020 ◽  
Vol 12 (16) ◽  
pp. 16255-16269
Author(s):  
Zhi Qu ◽  
Shaoping Ji ◽  
Shanqing Zheng
Keyword(s):  
Abnormal Cell ◽  
C Elegans ◽  
Cell Divisions

Stimulated Virus Production in Vinblastine and Cytochalasin-Induced Multinucleate Cells

1970 ◽  
Vol 28 ◽  
pp. 186-187
Author(s):  
Krishan Awtar
Keyword(s):  
Cell Division ◽  
Normal Cell ◽  
Virus Production ◽  
Multinucleate Cells ◽  
Daughter Cells ◽  
Cell Divisions ◽  
Nuclear Membranes ◽  
Division 2 ◽  
Vinblastine Sulfate

Exposure of cells to low sublethal but mitosis-arresting doses of vinblastine sulfate (Velban) results in the initial arrest of cells in mitosis followed by their subsequent return to an “interphase“-like stage. A large number of these cells reform their nuclear membranes and form large multimicronucleated cells, some containing as many as 25 or more micronuclei (1). Formation of large multinucleate cells is also caused by cytochalasin, by causing the fusion of daughter cells at the end of an otherwise .normal cell division (2). By the repetition of this process through subsequent cell divisions, large cells with 6 or more nuclei are formed.

Co-expression of AGPS and AGPL genes encoded for AGPase from cassava to enhance starch accumulation in transgenic tobacco

2016 ◽  
Vol 14 (2) ◽  
pp. 287-293
Author(s):  
Nguyễn Văn Đoài ◽  
Nguyễn Minh Hồng ◽  
Lê Thu Ngọc ◽  
Nguyễn Thị Thơm ◽  
Nguyễn Đình Trọng ◽  
...  
Keyword(s):  
Transgenic Tobacco ◽  
Higher Plants ◽  
Starch Content ◽  
Genetically Modified Crops ◽  
Starch Accumulation ◽  
35S Promoter ◽  
Effective Strategies ◽  
Plant Expression Vector ◽  
Transgenic Lines ◽  
Cassava Varieties

The AGPase (ADP-Glucose pyrophosphorylase) is one of the ubiquitous enzymes catalyzing the first step in starch biosynthesis. It plays an important role in regulation and adjusts the speed of the entire cycle of glycogen biosynthesis in bacteria and starch in plants. In higher plants, it is a heterotetramer and tetrameric enzyme consisting two large subunits (AGPL) and two small subunits (AGPS) and encoded by two genes. In this paper, both AGPS and AGPL genes were sucessfully isolated from cassava varieties KM140 and deposited in Genbank with accession numbers KU243124 (AGPS) and KU243122 (AGPL), these two genes were fused with P2a and inserted into plant expression vector pBI121 under the control of 35S promoter. The efficient of this construct was tested in transgenic N. tabacum. The presence and expression of AGPS and AGPL in transgenic plants were confirmed by PCR and Western hybridization. The starch content was quantified by the Anthrone method. Transgenic plant analysis indicated that that two targeted genes were expressed simultaneously in several transgenic tobacco lines under the control of CaMV 35S promoter.  The starch contents in 4 analyzed tobacco transgenic lines displays the increase 13-116%  compared to WT plants. These results indicated that the co-expression of AGPS and AGPL is one of effective strategies for enhanced starch production in plant. These results can provide a foundation for developing other genetically modified crops to increase starch accumulation capacity.

Sign in / Sign up

Export Citation Format

Share Document