The selective increase or decrease of organellar DNA in generative cells just after pollen mitosis one controls cytoplasmic inheritance

Planta ◽  
1999 ◽  
Vol 209 (1) ◽  
pp. 53-65 ◽  
Author(s):  
Noriko Nagata ◽  
Chieko Saito ◽  
Atsushi Sakai ◽  
Haruko Kuroiwa ◽  
Tsuneyoshi Kuroiwa
Keyword(s):  
Cytoplasmic Inheritance ◽  
Pollen Mitosis ◽  
Organellar Dna ◽  
Selective Increase ◽  
Generative Cells

Selective increase ofin vivofiring frequencies in DA SN neurons after proteasome inhibition in the ventral midbrain

2014 ◽  
Vol 40 (6) ◽  
pp. 2898-2909 ◽  
Author(s):  
Mahalakshmi Subramaniam ◽  
Beatrice Kern ◽  
Simone Vogel ◽  
Verena Klose ◽  
Gaby Schneider ◽  
...  
Keyword(s):  
Proteasome Inhibition ◽  
Ventral Midbrain ◽  
Selective Increase

Structural features of isolated generative cells and their protoplasts from pollen of some liliaceous plants

1989 ◽  
Vol 24 (4) ◽  
pp. 361-374 ◽  
Author(s):  
Ichiro Tanaka ◽  
Sumio Nakamura ◽  
Hisako Miki-Hirosige
Keyword(s):  
Structural Features ◽  
Generative Cells

scholarly journals Organelle Division and Cytoplasmic Inheritance

BioScience ◽  
1996 ◽  
Vol 46 (11) ◽  
pp. 827-835 ◽  
Author(s):  
Tsuneyoshi Kuroiwa ◽  
Hidenobu Uchida
Keyword(s):  
Cytoplasmic Inheritance ◽  
Organelle Division

scholarly journals Formation of Conidial Pseudochains by Tomato Powdery Mildew Oidium neolycopersici

Plant Disease ◽  
2006 ◽  
Vol 90 (7) ◽  
pp. 915-919 ◽  
Author(s):  
W. Oichi ◽  
Y. Matsuda ◽  
T. Nonomura ◽  
H. Toyoda ◽  
L. Xu ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Powdery Mildew ◽  
Critical Level ◽  
Oidium Neolycopersici ◽  
Ambient Relative Humidity ◽  
Digital Microscope ◽  
Tomato Powdery Mildew ◽  
A Chain ◽  
Weak Wind ◽  
Generative Cells

The formation of conidial pseudochains by the tomato powdery mildew Oidium neolycopersici on tomato leaves was monitored using a high-fidelity digital microscope. Individual living conidiophores that formed mature conidial cells at their apex were selected for observation. The conidial cells were produced during repeated division and elongation by the generative cells of the conidiophores. Under weak wind conditions (0.1 m/s), these conidial cells did not separate from each other to produce a chain of conidial cells (pseudochain). The pseudochains dropped from the conidiophores once four conidial cells were connected. The conidiophores resumed conidium production, followed by another cycle of pseudochain formation. The formation of pseudochains by tomato powdery mildew was not influenced by the ambient relative humidity. On the other hand, the conidial cells produced were easily wind dispersed without forming pseudochains when conidiophores were exposed to stronger winds (1.0 m/s). The present study successfully demonstrated that the pathogen required wind to disperse progeny conidia from the conidiophores and produced conidial pseudochains when the wind was below a critical level, independent of high relative humidity as reported previously.

scholarly journals LYSOSOMAL PHOSPHOLIPASES A1 AND A2 OF NORMAL AND BACILLUS CALMETTE GUERIN-INDUCED ALVEOLAR MACROPHAGES

1973 ◽  
Vol 56 (3) ◽  
pp. 621-627 ◽  
Author(s):  
Richard C. Franson ◽  
Moseley Waite
Keyword(s):  
Acid Phosphatase ◽  
Alveolar Macrophages ◽  
Sucrose Gradient ◽  
Gradient Centrifugation ◽  
Marker Enzymes ◽  
Sucrose Gradient Centrifugation ◽  
Control Distribution ◽  
Specific Activities ◽  
Selective Increase ◽  
Phospholipases A

A single intravenous injection of 0.1 mg of heat-killed Bacillus Calmette Guérin (BCG) in 0.1 ml of Bayol F produced an accumulation of activated alveolar macrophages (BCG induced). Cells were collected 3.5–4.0 wk after injection. Phospholipases A and three lysosomal marker enzymes (acid phosphatase, ß-glucuronidase, and lysozyme) were measured in homogenates, and the distribution of the phospholipases A and lysosomal, mitochondrial, and microsomal marker enzymes were examined after sucrose gradient centrifugation of a postnuclear (1,000 g) supernatant. Homogenates of normal and BCG-induced macrophages contained phospholipases A1 and A2 which had optimal activity at pH 4.0 in the presence of 2.0 mM ethylenediaminetetraacetate (EDTA). These activities were inhibited 50–70% by 2.0 mM CaCl2. Homogenates of BCG-induced macrophages had specific activities of ß-glucuronidase, acid phosphatase, and lysozyme, which were increased 1.5- to 3.0-fold over the controls, whether expressed as activity per mg protein or activity per 107 cells. The specific activities of the phospholipases A, on the other hand, were consistently lower than those of the control. Distribution of the phospholipases A and the lysosomal marker enzymes after sucrose gradient centrifugation suggested that the phospholipases A active at pH 4.0 in the presence of EDTA are of lysosomal origin since: (a) BCG treatment caused a selective increase in the density of particles which contained both the phospholipases A and three lysosomal marker enzymes; and (b) since the density of mitochondria and microsomes were not affected by BCG treatment. The increase in the density of lysosomes seen here may be related to previously described morphologic changes of BCG-induced alveolar macrophages.

scholarly journals Control of murine Ly6Chigh monocyte traffic and immunosuppressive activities by atypical chemokine receptor D6

Blood ◽  
2012 ◽  
Vol 119 (22) ◽  
pp. 5250-5260 ◽  
Author(s):  
Benedetta Savino ◽  
Marina G. Castor ◽  
Nicoletta Caronni ◽  
Adelaida Sarukhan ◽  
Achille Anselmo ◽  
...  
Keyword(s):  
Chemokine Receptor ◽  
Scavenger Receptor ◽  
Lymphoid Tissues ◽  
Dependent Manner ◽  
Inflammatory Reactions ◽  
Adaptive Immune ◽  
Inflammatory Conditions ◽  
Cc Chemokines ◽  
Secondary Lymphoid Organs ◽  
Selective Increase

Abstract The atypical chemokine receptor D6 is a decoy and scavenger receptor for most inflammatory CC chemokines and prevents the development of exacerbated inflammatory reactions. Here we report that mice lacking D6 expression in the nonhematopoietic compartment have a selective increase in the number of Ly6Chigh monocytes in the circulation and in secondary lymphoid tissues. Under inflammatory conditions, Ly6Chigh monocytes accumulate in increased number in secondary lymphoid organs of D6−/− mice in a CCR2-dependent manner. Ly6Chigh monocytes derived from D6−/− mice have enhanced immunosuppressive activity, inhibit the development of adaptive immune responses, and partially protect mice from the development of GVHD. Thus, control of CCR2 ligands by D6 regulates the traffic of Ly6Chigh monocytes and controls their immunosuppressive potential.

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