Die Anfangsphasen des durch Steringlucoside und Indol-3-essigsäure stimulierten Wachstums bei Avenakoleoptilen / Initial Phases of Growth Induced by Sterylglucosides and Indole-3-acetic Acid in Avena Coleoptiles

1981 ◽  
Vol 36 (9-10) ◽  
pp. 900-901 ◽  
Author(s):  
Amo Tietz
Keyword(s):  
Growth Rate ◽  
Acetic Acid ◽  
Sharp Increase ◽  
Growth Response ◽  
Avena Coleoptile ◽  
Recording Technique ◽  
First Response ◽  
Indole 3 Acetic Acid ◽  
Primary Action ◽  
Membrane Level

AbstractThe initial phases of growth induced by sterylglucosides were investigated by means of a high resolution recording technique. Avena coleoptile segments were preincubated with 10-6 M IAA in buffered solution, then the β-vglucosides of sitosterol, stigmasterol, campesterol, and cholesterol respectively were added in the concentration range from 10-7 –10-6 m . It could be demonstrated that the first response to the applied sterylglucosides is a reduction of the growth rate lasting about 15 min, followed by a sharp increase of the growth rate. As the growth response of the coleoptiles after treatment with sterylglucosides is very similar to that observed after application o f IAA alone, it is concluded from the results that sterylglucosides or sterols may also exhibit their primary action at the membrane level, perhaps by influencing microviscosity of the membrane and/or H +-secretion.

scholarly journals Response of pine hypocotyl sections to growth regulators and related substances

2015 ◽  
Vol 44 (1) ◽  
pp. 123-132
Author(s):  
J. Zakrzewski
Keyword(s):  
Acetic Acid ◽  
Growth Regulators ◽  
Growth Response ◽  
Extended Period ◽  
Dichlorophenoxyacetic Acid ◽  
Pinus Silvestris ◽  
Related Substances ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
Indole 3 Acetic Acid ◽  
Synthetic Growth

Growth response of <i>Pinus silvestris</i> hypocotyl sections to some synthetic growth regulators and related substances was studied. Elongation of hypocotyl sections was stimulated by naphtaleneacetic acid, indole-3-acetic acid, in-dole-3-propionic acid, indole-3-butyric acid, 2,4-dichlorophenoxyacetic acid, indoleaoetic amide, indoleacetic nitrile and coumarin. Indole-3-acetic acid and naphtaleneacetic acid extended period of growth up to 16 and 24 hours, respectively. Growth was inhibited by kinetin, trans-cinnamic acid and 2,3,5-tri-iodobenzoic acid. No effect of gibberellic acid, tryptophan and biotin was observed.

scholarly journals Primary Action of Indole-3-acetic Acid in Crown Gall Tumors

1984 ◽  
Vol 75 (2) ◽  
pp. 354-358 ◽  
Author(s):  
Thomas Rausch ◽  
Günter Kahl ◽  
Willy Hilgenberg
Keyword(s):  
Acetic Acid ◽  
Crown Gall ◽  
Crown Gall Tumors ◽  
Indole 3 Acetic Acid ◽  
Primary Action

The effect of auxin (indole-3-acetic acid) on the growth rate and tropism of the sporangiophore of Phycomyces blakesleeanus and identification of auxin-related genes

PROTOPLASMA ◽  
2018 ◽  
Vol 255 (5) ◽  
pp. 1331-1347 ◽  
Author(s):  
Branka D. Živanović ◽  
Kristian K. Ullrich ◽  
Bianka Steffens ◽  
Sladjana Z. Spasić ◽  
Paul Galland
Keyword(s):  
Growth Rate ◽  
Acetic Acid ◽  
Phycomyces Blakesleeanus ◽  
Indole 3 Acetic Acid

scholarly journals THE EFFECT OF AUXINS ON PROTOPLASMIC STREAMING. II

1938 ◽  
Vol 21 (4) ◽  
pp. 439-461 ◽  
Author(s):  
Beatrice Marcy Sweeney ◽  
Kenneth V. Thimann
Keyword(s):  
Acetic Acid ◽  
Oxygen Deficiency ◽  
Pure Water ◽  
Time Of Day ◽  
Protoplasmic Streaming ◽  
Avena Coleoptile ◽  
Transient Nature ◽  
The Mean ◽  
Time Of Year ◽  
Indole 3 Acetic Acid

1. A further study has been made of the effect of indole-3-acetic acid (auxin) on protoplasmic streaming in the epidermal cells of the Avena coleoptile. 2. The transient nature of the effect of auxin, both in accelerating and retarding streaming, is due to the temporary exhaustion of carbohydrate from the tissues. In presence of 1 per cent fructose or some other sugars the acceleration or retardation of streaming by auxin is not transient, but is maintained for at least 2 hours. 3. The retardation of streaming brought about by concentrations of auxin above 0.5 mg. per liter is due to oxygen deficiency This has been confirmed in several ways. 4. It follows that the effect of auxin is to increase the respiration of the coleoptile tissue. 5. Younger coleoptiles, 3 cm. long, are sensitive to lower concentrations of auxin than those 5 cm. long, and more readily exhibit oxygen deficiency as a result of the action of auxin. However, after decapitation their response to auxin more closely resembles that of 5 cm. coleoptiles. 6. The retardation of streaming in such coleoptiles, resulting from oxygen deficiency, is delayed by very dilute solutions of histidine. On this basis an explanation is suggested for the results of Fitting on streaming in Vallisneria leaves. 7. The mean rate of streaming in control untreated coleoptiles in pure water varies with the time of year, but not with the time of day. 8. The results support the view that auxin accelerates an oxygen-consuming process which controls the rate of protoplasmic streaming, and that the latter controls growth. The substrate for this process is probably sugar. 9. It is suggested that auxin also accelerates another oxygen-consuming process, which may withdraw oxygen from the process which controls streaming rate and hence cause retardation of the latter.

The Growth Response of Lophocolea heterophylla Setae Segments to Exogenous Indole-3-Acetic Acid

1970 ◽  
Vol 73 (4) ◽  
pp. 713 ◽  
Author(s):  
R. J. Thomas ◽  
Jane Taylor ◽  
M. J. Montague
Keyword(s):  
Acetic Acid ◽  
Growth Response ◽  
Indole 3 Acetic Acid

scholarly journals Poinsettia ‘Prestige™ Red’ (Euphorbia pulcherrima) In Vitro Propagation

HortScience ◽  
2010 ◽  
Vol 45 (7) ◽  
pp. 1126-1128
Author(s):  
Dinum Perera ◽  
Brian W. Trader
Keyword(s):  
Growth Rate ◽  
Acetic Acid ◽  
In Vitro Propagation ◽  
Basal Medium ◽  
Euphorbia Pulcherrima ◽  
In Vitro Proliferation ◽  
Slow Growth Rate ◽  
Half Strength ◽  
Indole 3 Acetic Acid

Slow growth rate of plantlets, few micro-shoots per explant, and slow root growth rate are restrictions of in vitro propagation of poinsettia (Euphorbia pulcherrima Willd. ex Koltz). The purpose of this research was to develop an efficient in vitro proliferation technique for poinsettia ‘Prestige™ Red’. Explants (apical buds and axillary buds) placed on Murashige and Skoog (MS) basal medium containing only 6-benzylaminopurine (BA) and combinations of BA and indole-3-acetic acid (IAA) mostly produced red callus, which is productive and some white and gray–green calluses at the base of plantlets after 1 month, whereas explants in a medium without plant growth regulators (PGRs) produced no callus. Addition of IAA into the rooting medium increased rooting efficiency; plantlets grown in half-strength MS salts and vitamins with 28.5 μM IAA initiated rooting 11 days earlier than the plantlets grown with no PGRs. Optimization of PGR concentrations during poinsettia micropropagation helped resolve previous restrictions of in vitro poinsettia proliferation. Chemical names used: 6-benzylaminopurine (BA); indole-3-acetic acid (IAA)

scholarly journals Uptake of Indole-3-acetic Acid and Indole-3-acetonitrile by Avena Coleoptile Sections

1964 ◽  
Vol 39 (1) ◽  
pp. 98-103 ◽  
Author(s):  
Ronald J. Poole ◽  
Kenneth V. Thimann
Keyword(s):  
Acetic Acid ◽  
Avena Coleoptile ◽  
Indole 3 Acetic Acid

scholarly journals RESPON PERTUMBUHAN TUNAS SANINTEN (Castanopsis argentea (Blume) A.DC.) TERHADAP PEMBERIAN ZAT PENGATUR TUMBUH BAP DAN IAA SECARA IN VITRO The growth response of Saninten (Castanopsis argentea (Blume) A.DC.) In Vitro by Adding Plant Growth Regulator BAP

2018 ◽  
Vol 8 (3) ◽  
pp. 208-214
Author(s):  
Arum Sekar Wulandari ◽  
Erina Sulistiani ◽  
Esthi Liani Agustiani
Keyword(s):  
Acetic Acid ◽  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Growth Response ◽  
Woody Plant ◽  
Shoot Height ◽  
Woody Plant Medium ◽  
Indole 3 Acetic Acid

Saninten (Castanopsis argentea (Blume) A.DC.) is one of the member Fagaceae family which can produce wood and non-wood product. Micropropagation of saninten by in vitro has never been reported. This research aims to identify the growth response of saninten shoot by adding Plant Growth Regulator (PGR), they are 6-benzylaminopurine (BAP) and indole-3-acetic-acid (IAA) with different concentrations in propagation in vitro on woody plant medium (WPM). The research conducted a completely randomized design (CRD) factorial. They are PGR type and PGR concentration. The PGR type consist of two levels namely BAP and IAA. PGR concentration consist of three levels namely 0 mg/L BAP and IAA, 0.5 mg/L BAP or 0.1 mg/L IAA, and 1.0 mg/L BAP or 0.1 mg/L IAA. Parameters observed is the amount of shoot, shoot height, and callus growth. The combination of BAP (0, 0.5, 1 mg/L) and IAA (0, 0.1, 0.1 mg/L) haven’t produce optimal growth of shoot. WPM medium with 0.5 mg/L BAP was able to produce the best of percentage of shoot, the number of shoots, and shoot height growth. WPM medium with IAA concentration of 0.1 and 0.2 mg/L produce explant with callus.Key words: 6-benzylaminopurine (BAP), Castanopsis argentea, indole-3-acetic-acid (IAA), woody plant medium (WPM)

scholarly journals Promotion of in Vitro Leaf Growth of Inner Scales Excised from Dormant Onion Bulbs

HortScience ◽  
1990 ◽  
Vol 25 (2) ◽  
pp. 228-229
Author(s):  
Kil Sun Yoo ◽  
Leonard M. Pike ◽  
B. Greg Cobb
Keyword(s):  
Growth Rate ◽  
Acetic Acid ◽  
Abscisic Acid ◽  
Gibberellic Acid ◽  
Allium Cepa ◽  
Leaf Growth ◽  
Inhibitory Effects ◽  
Short Day ◽  
Indole 3 Acetic Acid

Inner scales excised from dormant bulbs of the short-day `Texas Grano 1015Y' onion (Allium cepa L.) were cultured in vitro and leaf growth was examined. Light promoted leaf growth, but no differences in leaf growth were observed for media pH between 4 and 7. Leaf growth rate in darkness was highest at 24C, reduced at 15C, and greatly reduced at SC. Kinetin promoted leaf growth at 1, 10, and 100 μm. IAA was effective at 1 and 10 μM, but not at 0.1 and 100 μm. GA3 promoted growth at 0.1 μM. No inhibitory effects of ABA on leaf growth could be detected. Chemical names used: 1-H-indole-3-acetic acid (IAA), abscisic acid (ABA), gibberellic acid (GA3), 6-furfurylaminopurine (Kinetin).

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