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

1985 ◽  
Vol 65 (2) ◽  
pp. 369-377 ◽  
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

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

1986 ◽  
Vol 41 (1-2) ◽  
pp. 141-147 ◽  
Author(s):  
Bernd Schneider ◽  
Horst-Robert Schütte ◽  
Alfred Preiss
Keyword(s):  
Nmr Spectroscopy ◽  
Hordeum Vulgare ◽  
Plant Growth ◽  
Growth Regulator ◽  
Nutrient Medium ◽  
Plant Growth Regulator ◽  
Time Course ◽  
Enoic Acid ◽  
H Nmr ◽  
Time Periods

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.

scholarly journals Nitrogen supply associated with the application of trinexapac-ethyl in upland rice irrigated by sprinkler

2019 ◽  
Vol 40 (5Supl1) ◽  
pp. 2137
Author(s):  
Igor Balbi Guirão Peron ◽  
José Roberto Portugal ◽  
Orivaldo Arf ◽  
Ricardo Antônio Ferreira Rodrigues ◽  
Douglas de Castilho Gitti
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Foliar Application ◽  
Upland Rice ◽  
Sprinkler System ◽  
Nitrogen Supply ◽  
Differentiation Stage ◽  
Milling Yield

The lodging of rice plants significantly increases the losses of this crop. Lodging is caused by the inadequate management of water and fertilizers, particularly nitrogenous fertilizers. The use of growth regulators causes a reduction in plant height and consequently lodging, and may reduce harvest losses. The objective of this study was to evaluate nitrogen (N) doses with and without application of plant growth regulator in upland rice irrigated by a sprinkler system. The experimental design consisted of randomized blocks arranged in a 4 × 2 factorial design with four replicates. The treatments consisted of four N doses (0, 40, 80, and 120 kg ha-1) combined with the presence or absence of foliar application of a plant growth regulator. The application of 150 g ha-1 of trinexapac-ethyl at the flower differentiation stage reduced plant height and lodging. In addition, this treatment promoted increased 100-grain mass. The use of N doses in topdressing increased plant heights and grain yield. The plant growth regulator did not interfere with the milling yield of upland rice. Nitrogen fertilization in the topdressing did not interfere with the milling yield of upland rice irrigated by a sprinkler system.

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

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.

scholarly journals Saline-water irrigation and plant growth regulator application on zucchini fruit yield and quality

2020 ◽  
Vol 24 (10) ◽  
pp. 679-684
Author(s):  
Maria W. de L. Souza ◽  
Salvador B. Torres ◽  
Francisco de A. de Oliveira ◽  
Isabelly C. da S. Marques ◽  
Kleane T. O. Pereira ◽  
...  
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Foliar Application ◽  
Saline Water ◽  
Block Design ◽  
Biomass Accumulation ◽  
Fruit Yield ◽  
Flowering Stage ◽  
Yield And Quality

ABSTRACT The objective of this study was to evaluate the effect of a plant growth regulator (PGR; Stimulate®) on the yield and quality of zucchini fruits from plants of the cultivar Caserta-Italiana grown under different salinity levels of the irrigation water (SLIW). A randomized block design was used, in a 2 × 6 factorial arrangement consisted of two SLIW (0.5 and 5.0 dS m-1) and six PGR application modes: imbibition of seeds for 8 h in distilled water (PGR-T1; Control); imbibition of seeds for 8 h in PGR at 10 mL L-1 (PGR-T2); imbibition of seeds for 8 h in PGR at 10 mL L-1 plus foliar application at 10 mL L-1 at the flowering stage (PGR-T3); imbibition of seeds for 8 h in PGR at 10 mL L-1 plus two foliar applications at the flowering stage and at 20 and 30 days after sowing (PGR-T4); foliar application at 10 mL L-1 at the flowering stage (PGR-T5); and two foliar applications at 10 mL L-1 at 20 and 30 days after sowing (PGR-T6). The SLIW affected differently the variables of the zucchini crops evaluated. The PGR application to plants under no salt stress (0.5 dS m-1) increased the solid soluble concentration and biomass accumulation of zucchini fruits. The PGR application as seed treatment and foliar application at the flowering stage increased the fruit yield of zucchini plants irrigated with saline water.

scholarly journals Effect of Indoleacetic Acid and Zinc Sulphate Application on Growth and Some Physiological Parameters of Cowpea (Vigna sinensis Savi) Plants

2019 ◽  
Vol 4 (1) ◽  
pp. 15-19
Author(s):  
Ikbal Muhammed Gharib Tahir ◽  
Sargul Ahmad Khudur ◽  
Arol Mohsen Anwar
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Dry Matter ◽  
Zinc Sulphate ◽  
Indoleacetic Acid ◽  
Foliar Application ◽  
Vigna Sinensis ◽  
Total Carotenoids ◽  
Stomata Number

This study was conducted in Koya city, Iraq on cowpea (Vigna sinensis Savi) plants California black eye variety by factorial experiment including the effects of foliar spraying of Zinc Sulphate ZnSO4.7H2O (ZS) or the plant growth regulator Indoleacetic Acid C10H9NO2 (IAA). Analysis of data revealed that ZS and IAA application affects significantly on the studied traits. 100 ppm of IAA increased significantly the leaves content of each of chlorophylls a, b, and total, although it decreased the content of total carotenoids. The results showed that the leaf area significantly increased by increasing the amount of ZS to 2.0 g/L compare with other treatments except 1.0 g/L ZS application. Foliar application of IAA increased significantly the dry matter percent of shoots and roots as well as the number of nodules per plant. It has been found that leaves content of zinc is related to the concentration of ZS applied significantly compared to the control and IAA treatments, however, the application of IAA caused to decrease K and Zn contents in leaf of the plants compared to other treatments. Finally, based on the results the best ratio of IAA for increased stomata number on the abaxial and adaxial leaves surfaces was 75 ppm.

Influence of plant growth regulator and rhizobial inoculation on nodulation and soybean nitrogen contant

2007 ◽  
Vol 35 (2) ◽  
pp. 993-996 ◽  
Author(s):  
Sulejman Redžepović ◽  
Sanja Sikora ◽  
Josip Čolo ◽  
Mihaela Blažinkov ◽  
Marija Pecina
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Rhizobial Inoculation
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