Metabolism of the Plant Growth Regulator (E)-[3H]2-Ethylhex-2-enoic Acid in Hordeum vulgare

The metabolism of (E)-[3H]2-ethylhex-2-enoic acid (EHA) was studied in excised seedlings of barley (Hordeum vulgare). It was rapidly taken up from the nutrient medium. The metabolites, isolated by extraction with methanol, separated and purified by TLC and HPLC, were identified by enzymatic, chemical, and spectrometric methods, especially 1H-NMR spectroscopy. The time course of metabolism during 6 , 12, 24, 48, and 72 h is presented, indicating interconversation reactions. A rapid conjugation with glucose was observed, decreasing in concentration again after longer time periods in favour of disaccharide esters, higher conjugates, and a hydroxylation product which was present in free and conjugated form.

Download Full-text

A MODEL SYSTEM FOR THE STUDY OF 2,4-D TRANSLOCATION IN LEAFY SPURGE

Canadian Journal of Plant Science ◽

10.4141/cjps85-052 ◽

1985 ◽

Vol 65 (2) ◽

pp. 369-377 ◽

Cited By ~ 9

Author(s):

SARAH E. LINGLE ◽

JEFFREY C. SUTTLE

Keyword(s):

Plant Growth ◽

Growth Regulator ◽

Nutrient Medium ◽

Plant Growth Regulator ◽

Root Zone ◽

Foliar Application ◽

Leafy Spurge ◽

Model System ◽

Euphorbia Esula ◽

Axillary Shoots

A model system was devised to study the translocation of 2,4-D in leafy spurge (Euphorbia esula L.). The effects of rate of 2,4-D application, decapitation, and rate and pretreatment with ethephon on 14C-2,4-D translocation were studied. Rooted cuttings were obtained by rooting newly-developed axillary shoots in moist vermiculite for 4 wk. These cuttings were then placed in liquid nutrient medium for translocation experiments. Seven days after application, 50–60% of the 14C translocated from 14C-2,4-D treated leaves was found in the stem. The percentage of 14C that accumulated in the stem increased with increasing rate of 2,4-D application to 1 kg/ha. Up to 85% of 14C translocated to the root was released into the nutrient medium. Shoot decapitation 5 mm below the apex up to 4 days before 2,4-D application decreased 14C percentage in leaf tissue and increased 14C in stem and root. Foliar application of ethephon at 1 kg/ha resulted in a transient increase in the rate of ethylene evolution from shoot and root tissues, decreased the amount of 14C translocated to the root zone and increased the 14C in the leaves. Ethephon treatment of larger, vermiculite-grown plants also decreased 14C accumulation in the roots. These results indicate that the use of root cuttings is a convenient and reliable method for the study of herbicide translocation and plant growth regulator/herbicide interactions in leafy spurge.Key words: Translocation, 2,4-D, leafy spurge, Euphorbia esula L., plant growth regulator, ethephon

Download Full-text

THE EFFECT OF A SEAWEED EXTRACT CONTAINING CYTOKININ ON THE GROWTH AND YIELD OF BARLEY

Canadian Journal of Plant Science ◽

10.4141/cjps90-140 ◽

1990 ◽

Vol 70 (4) ◽

pp. 1163-1167 ◽

Cited By ~ 4

Author(s):

J. S. TAYLOR ◽

K. N. HARKER ◽

J. M. ROBERTSON ◽

K. R. FOSTER

Keyword(s):

Hordeum Vulgare ◽

Plant Growth ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Field Conditions ◽

Seaweed Extract ◽

Growth And Yield ◽

Hordeum Vulgare L ◽

Beneficial Effects ◽

Seaweed Extracts

A cytokinin-containing seaweed extract, Nitrozyme™ (Nitrozyme1), was tested under field conditions over 4 yr for its effects on the growth and yield of barley (Hordeum vulgare L.). In 1986 and 1987, Nitrozyme did not increase yield and had no beneficial effects on growth of Harrington and Bonanza barley. In 1988 and 1989, the effects of Nitrozyme on barley (cv. Leduc) were compared against those of kinetin, a synthetic cytokinin. Neither Nitrozyme nor kinetin had an effect on growth or yield.Key words: Nitrozyme, seaweed extracts, cytokinins, kinetin, plant growth regulator, Hordeum vulgare L.

Download Full-text

Cucurbic Acid Related Metabolites of the Plant Growth Regulator Dihydrojasmonic Acid in Barley (Hordeum vulgare)1

Biochemie und Physiologie der Pflanzen ◽

10.1016/s0015-3796(11)80047-8 ◽

1991 ◽

Vol 187 (6) ◽

pp. 401-408 ◽

Cited By ~ 3

Author(s):

Angelika Meyer ◽

Dieter Gross ◽

Jürgen Schmidt ◽

Einar Jensen ◽

Sabine Vorkefeld ◽

...

Keyword(s):

Hordeum Vulgare ◽

Plant Growth ◽

Growth Regulator ◽

Plant Growth Regulator

Download Full-text

Amino acid conjugates as metabolites of the plant growth regulator dihydrojasmonic acid in barley (Hordeum vulgare)

Journal of Plant Growth Regulation ◽

10.1007/bf02279306 ◽

1991 ◽

Vol 10 (1-4) ◽

pp. 17-25 ◽

Cited By ~ 21

Author(s):

A. Meyer ◽

J. Schmidt ◽

D. Gross ◽

E. Jensen ◽

A. Rudolph ◽

...

Keyword(s):

Amino Acid ◽

Hordeum Vulgare ◽

Plant Growth ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Amino Acid Conjugates

Download Full-text

THE INFLUENCE OF PLANT GROWTH REGULATOR BIOLAN ON THE PHYTOHORMONAL ACTIVITY OF ENTEROBACTER NIMIPRESSURALIS 32-3

Agriciltural microbiology ◽

10.35868/1997-3004.10.41-49 ◽

2010 ◽

Vol 10 ◽

pp. 41-49

Author(s):

L.A. Chaikovska ◽

M.I. Baranska

Keyword(s):

Acetic Acid ◽

Plant Growth ◽

Growth Regulator ◽

Nutrient Medium ◽

Plant Growth Regulator ◽

Indole Acetic Acid

The influence of plant growth regulator Biolan on the ability of bacterium Enterobacter nimipressuralis 32-3 to synthesize phytohormones was investigated. It was revealed, that addition of Biolan in a nutrient medium had increased the quantity of indole-acetic acid (IAA) and citokinins (by 13,6 and 18 % correspondingly), and had reduced on 15 % the content of gibberellin-like substances.

Download Full-text