Stimulation of rice coleoptile growth by ethylene

Planta ◽  
1970 ◽  
Vol 90 (4) ◽  
pp. 333-339 ◽  
Author(s):  
Han San Ku ◽  
Hiroshi Suge ◽  
Lawrence Rappaport ◽  
Harlan K. Pratt
Keyword(s):  
Coleoptile Growth ◽  
Rice Coleoptile ◽  
Stimulation Of

COLEORHIZA, ROOT AND COLEOPTILE EMERGENCE AND GROWTH: EFFECTS OF DIFFERENT WATER VOLUMES

1979 ◽  
Vol 59 (1) ◽  
pp. 61-67 ◽  
Author(s):  
D. DAVIDSON
Keyword(s):  
Hordeum Vulgare ◽  
Ambient Water ◽  
Coleoptile Growth ◽  
Growth Effects ◽  
Water Conditions ◽  
Water Volumes ◽  
Petri Plate ◽  
C 30 ◽  
Filter Papers ◽  
Stimulation Of

The percentage of barley seeds (Hordeum vulgare) with coleorhiza or roots emerged at various times after germination in different volumes of water was determined. Germination was followed in barley seeds sown on filter papers moistened with 6–25 ml of water for up to 24 h at 25 °C; 30 seeds were sown on each 15-cm diameter petri plate. The most rapid germination, judged on coleorhiza emergence, occurred on 20 and 25 ml of water at 6 h, but root emergence was better on 9 than on 20 ml of water. Conditions appropriate for coleorhiza emergence retard root emergence. Similarly, at 45 h, coleoptile growth was better on 9 and 12 ml than on 20 ml of water. The initial stimulation of germination by 20 ml of water, succeeded by an inhibition of root and coleoptile growth, suggests that the various organs of a barley embryo respond differentially to different volumes of ambient water.

Suppression of (1→3),(1→4)-β-d-Glucan Turnover during Light-Induced Inhibition of Rice Coleoptile Growth

1999 ◽  
Vol 112 (1) ◽  
pp. 7-13 ◽  
Author(s):  
Lei Chen ◽  
Seiichiro Kamisaka ◽  
Takayuki Hoson
Keyword(s):  
Coleoptile Growth ◽  
Rice Coleoptile

scholarly journals Rice Coleoptile Growth under Water and in Air - Possible Effect of Buoyancy on Growth and Cell Walls

1993 ◽  
Vol 7 (2) ◽  
pp. 120-123 ◽  
Author(s):  
S. Kamisaka ◽  
K.-S. Tan ◽  
T. Hoson ◽  
Y. Masuda
Keyword(s):  
Cell Walls ◽  
Coleoptile Growth ◽  
Rice Coleoptile

Stimulation of Avena coleoptile growth by reduction of oxygen supply

Planta ◽  
1974 ◽  
Vol 115 (4) ◽  
pp. 345-354 ◽  
Author(s):  
Tadashi Fujii ◽  
Masami Shimokoriyama ◽  
Hiroshi Ichimura
Keyword(s):  
Oxygen Supply ◽  
Avena Coleoptile ◽  
Coleoptile Growth ◽  
Stimulation Of

Effects of 5-5'-Diphenyl-2-thiohydantoin (DPTH) and Thyroxine on the Ultrastructure and Chemical Composition of Rat Liver

1971 ◽  
Vol 29 ◽  
pp. 570-571
Author(s):  
E. A. Elfont ◽  
R. B. Tobin ◽  
D. G. Colton ◽  
M. A. Mehlman
Keyword(s):  
Chemical Composition ◽  
Rat Liver ◽  
Future Study ◽  
Mode Of Action ◽  
Liver Mitochondria ◽  
Rat Liver Mitochondria ◽  
Effective Inhibitor ◽  
Biochemical Effects ◽  
Glycerophosphate Dehydrogenase ◽  
Stimulation Of

Summary5,-5'-diphenyl-2-thiohydantoin (DPTH) is an effective inhibitor of thyroxine (T4) stimulation of α-glycerophosphate dehydrogenase in rat liver mitochondria. Because this finding indicated a possible tool for future study of the mode of action of thyroxine, the ultrastructural and biochemical effects of DPTH and/or thyroxine on rat liver mere investigated.Rats were fed either standard or DPTH (0.06%) diet for 30 days before T4 (250 ug/kg/day) was injected. Injection of T4 occurred daily for 10 days prior to sacrifice. After removal of the liver and kidneys, part of the tissue was frozen at -50°C for later biocheailcal analyses, while the rest was prefixed in buffered 3.5X glutaraldehyde (390 mOs) and post-fixed in buffered 1Z OsO4 (376 mOs). Tissues were embedded in Araldlte 502 and the sections examined in a Zeiss EM 9S.Hepatocytes from hyperthyroid rats (Fig. 2) demonstrated enlarged and more numerous mitochondria than those of controls (Fig. 1). Glycogen was almost totally absent from the cytoplasm of the T4-treated rats.

Gap junctions in the prothoracic glands of the tobacco hornworm, Manduca sexta

1992 ◽  
Vol 50 (1) ◽  
pp. 706-707
Author(s):  
Ji-da Dai ◽  
M. Joseph Costello ◽  
Lawrence I. Gilbert
Keyword(s):  
Gap Junctions ◽  
Small Molecules ◽  
Manduca Sexta ◽  
Freeze Fracture ◽  
Cell Communication ◽  
Cellular Level ◽  
Thin Sections ◽  
Prothoracic Glands ◽  
Polyhydroxylated Steroids ◽  
Stimulation Of

Insect molting and metamorphosis are elicited by a class of polyhydroxylated steroids, ecdysteroids, that originate in the prothoracic glands (PGs). Prothoracicotropic hormone stimulation of steroidogenesis by the PGs at the cellular level involves both calcium and cAMP. Cell-to-cell communication mediated by gap junctions may play a key role in regulating signal transduction by controlling the transmission of small molecules and ions between adjacent cells. This is the first report of gap junctions in the PGs, the evidence obtained by means of SEM, thin sections and freeze-fracture replicas.

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