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

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.

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

Oxygen supply/uptake mismatch during incremental stimulation of the human tibialis anterior

2012 ◽  
Vol 7 (2-3) ◽  
pp. 65-70 ◽  
Author(s):  
Paolo Gaffurini ◽  
Caterina Neviani ◽  
Claudio Orizio ◽  
Massimiliano Gobbo
Keyword(s):  
Tibialis Anterior ◽  
Oxygen Supply ◽  
Stimulation Of

Protein kinase C-dependent stimulation of Na(+)-K(+)-ATP epsilon in rat proximal convoluted tubules

1995 ◽  
Vol 268 (5) ◽  
pp. C1277-C1283 ◽  
Author(s):  
E. Feraille ◽  
M. L. Carranza ◽  
B. Buffin-Meyer ◽  
M. Rousselot ◽  
A. Doucet ◽  
...  
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
Oxygen Supply ◽  
Hydrolytic Activity ◽  
Hypoxic Conditions ◽  
Kinase C ◽  
Paradoxical Finding ◽  
Pkc Inhibitors ◽  
Convoluted Tubules ◽  
Stimulation Of

In rat proximal convoluted tubule (PCT), activation of protein kinase C (PKC) by phorbol 12,13-dibutyrate (PDBu) was previously reported to inhibit Na(+)-K(+)-ATPase, a paradoxical finding in view of the known stimulatory effect of PKC on Na+ reabsorption. Because this inhibition occurs via phospholipase A2 activation, a pathway stimulated by hypoxia, we evaluated the influence of oxygen supply on PKC action on Na(+)-K(+)-ATPase. Results confirmed that PDBu inhibited PCT Na(+)-K(+)-ATPase activity under usual conditions. In contrast, when oxygen supply was increased, PDBu had no effect on Na(+)-K(+)-ATPase hydrolytic activity, but it dose-dependently stimulated ouabain-sensitive 86Rb+ uptake. This latter effect, which was abolished by PKC inhibitors, resulted from an increment of the Na+ sensitivity of Na(+)-K(+)-ATPase. Thus, in oxygenated rat PCTs, activation of PKC primarily stimulated Na(+)-K(+)-ATPase. This likely contributes to increase solute reabsorption. Inhibition of Na(+)-K(+)-ATPase was observed only under hypoxic conditions. It may represent an adaptation to protect PCTs against deleterious effects of hypoxia.

Relations between coronary flow and work of the heart

1961 ◽  
Vol 200 (2) ◽  
pp. 243-246 ◽  
Author(s):  
A. Rosenblueth ◽  
J. Alanís ◽  
R. Rubio ◽  
G. Pilar
Keyword(s):  
Working Conditions ◽  
Coronary Flow ◽  
Oxygen Supply ◽  
Aortic Pressure ◽  
Wide Margin ◽  
Margin Of Safety ◽  
The Mean ◽  
Frequency Of Stimulation ◽  
Recipient Heart ◽  
Stimulation Of

The mean total coronary flow of dog hearts, perfused via the aorta by a donor dog, was recorded. The amount of work performed by the recipient heart was varied within wide ranges. Its aortic pressure was also varied, thus determining changes in the coronary flow. When the frequency of stimulation of the heart and the aortic pressure are maintained constant, changes of the work performed do not result in changes of the coronary flow. When the working conditions of the heart are maintained constant, changes of the coronary flow do not cause any variations of the amount of work performed. The work performed does not affect the pressure-flow relationships. It is concluded that with adequate circulation there is a wide margin of safety in the oxygen supply to the ventricle. The heart can increase its work importantly without producing or requiring an increase of its coronary flow.

scholarly journals Extension-Growth Activities of Some Cyclo Propane Derivatives, a New Class Of Antauxin.

1959 ◽  
Vol 12 (3) ◽  
pp. 257 ◽  
Author(s):  
NP Kefford
Keyword(s):  
Extension Growth ◽  
Avena Coleoptile ◽  
Coleoptile Growth ◽  
New Class ◽  
Cis And Trans

2,3-Dihydrobenzofur-2,3-yleneacetic acid, 1,2-dihydro-l,2-naphthyleneacetic acid, and cis- and trans-2,3-dihydrothionaphthen-2,3-yleneacetic acid have been shown to competitively inhibit auxin-induced growth of Avena coleoptile sections, and thus are antiauxins. trans-2-Phenylcyclopropanecarboxylic acid, 2,3dihydrothionaphthen-2,3-yleneacetic acid dioxide, and 1,2-3,4-tetrahydronaphth1,2-3,4-di(yleneacetic acid) were inactive towards coleoptile growth.

Stimulation of Synthesis of Ribonucleic Acid in Sub-apical Sections of Avena Coleoptile by Indolyl-3-acetic Acid

Nature ◽  
1965 ◽  
Vol 208 (5016) ◽  
pp. 1180-1183 ◽  
Author(s):  
T. H. HAMILTON ◽  
R. J. MOORE ◽  
A. F. RUMSEY ◽  
A. R. MEANS ◽  
A. R. SCHRANK
Keyword(s):  
Acetic Acid ◽  
Ribonucleic Acid ◽  
Avena Coleoptile ◽  
Stimulation Of

scholarly journals The Lack of Effect of Cyclic Adenosine 3′:5′-Monophosphate on Avena Coleoptile Growth

1975 ◽  
Vol 55 (4) ◽  
pp. 695-698 ◽  
Author(s):  
Mira Edgerton ◽  
Morris G. Cline ◽  
Marilyn M. Rehm
Keyword(s):  
Avena Coleoptile ◽  
Coleoptile Growth
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