The Avena geo-curvature test

Planta ◽  
1968 ◽  
Vol 84 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Harald Kaldewey ◽  
Jawahar Lal Wakhloo ◽  
Alfred Weis ◽  
Helga Jung
Keyword(s):  
Curvature Test

Growth-regulating properties of picloram, 4-amino-3,5,6-trichloropicolinic acid

1971 ◽  
Vol 49 (6) ◽  
pp. 889-897 ◽  
Author(s):  
W. R. Eisinger ◽  
D. J. Morré
Keyword(s):  
Root Growth ◽  
Growth Regulator ◽  
Root Growth Inhibition ◽  
Dichlorophenoxyacetic Acid ◽  
Cell Wall Loosening ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
Stem Curvature ◽  
Wall Loosening ◽  
Indole 3 Acetic Acid ◽  
Curvature Test

Picloram, 2,4-D (2,4-dichlorophenoxyacetic acid) and IAA (indole-3-acetic acid) cause similar stimulations of polarized cell elongation in stem and coleoptile sections floated on solutions containing the growth regulator. Picloram, like 2,4-D and IAA, supports growth of tissue explants in culture, inhibits root growth, induces cell wall loosening, produces stem curvature and other formative effects, promotes loss of chlorophyll, and regulates abscission and rooting responses. A kinetic analysis of root growth inhibition indicates a common mode of action for picloram and 2,4-D. Picloram meets the minimal structural requirements for auxin activity. The greater herbicidal effectiveness of picloram is attributed to increased mobility and resistance to breakdown within the plant. The ability of picloram to increase markedly the growth of intact shoot cuttings is not shared by either 2,4-D or IAA and neither picloram nor 2,4-D are readily transported in a polar manner in the Avena curvature test. We conclude that picloram functions as a growth regulator of the auxin type with a herbicidal action similar to that of 2,4-D.

scholarly journals A Simplified Avena Curvature Test Using Cut Coleoptiles

1964 ◽  
Vol 77 (912) ◽  
pp. 199-205 ◽  
Author(s):  
Susumu KURAISHI ◽  
Toshio YAMAKI
Keyword(s):  
Curvature Test

scholarly journals The Inactivity of 1-Docosanol in Some Plant Growth Tests in Relation to the Auxin of Maryland Mammoth tobacco

1962 ◽  
Vol 15 (2) ◽  
pp. 304 ◽  
Author(s):  
NP Kefford
Keyword(s):  
Nicotiana Tabacum ◽  
Plant Growth ◽  
Cell Extension ◽  
Avena Coleoptile ◽  
Indolylacetic Acid ◽  
Curvature Test

In extracts of shoots of Nicotiana tabacum cv. Maryland Mammoth, an auxin was detected with the same chromatographic properties as 3- indolylacetic acid (IAA). This auxin promoted cell extension in Avena coleoptile and first internode sections and was active in the Avena curvature test.

JWST center of curvature test method and results

2017 ◽  
Author(s):  
David M. Chaney ◽  
Babak N. Saif ◽  
Perry E. Greenfield ◽  
Kyle Van Gorkom ◽  
Keira J. Brooks ◽  
...  
Keyword(s):  
Test Method ◽  
Curvature Test

scholarly journals Response of Plant Hormone bioassay to Paclobutrazol

2019 ◽  
pp. 150-162
Author(s):  
Ashok Kumar ◽  
Singh CP ◽  
Sant Ram
Keyword(s):  
Plant Hormone ◽  
Quantitative Estimation ◽  
Living Organism ◽  
Biologically Active ◽  
Independent Effect ◽  
Low Concentration ◽  
Corn Roots ◽  
Radish Cotyledon ◽  
Gibberellin Activity ◽  
Curvature Test

Quantitative estimation of a known or suspected biologically active substance (such as a hormone or drug) by measuring its effect on a living organism in standard conditions is known as bioassay. The interaction of gibberellic acid (GA3) and paclobutrazol (PBZ) in lettuce hypocotyl bioassay and 6-benzyl aminopurine (BAP) and paclobutrazol in radish cotyledon enlargement test that paclobutrazol counteracts gibberellin activity when applied exogenously. The radish cotyledon enlargement at low concentration without counteracting BAP action. The reduction of growth to be counteracting of gibberellin activity by paclobutrazol as well as its cytokinin well activity at lower concentration which indicate concentration of gibberellins activity as evidence by their respective bioassay in the present investigation. Paclobutrazol slightly increased radish cotyledon growth at low concentration (up to 0.01 ppm) and could not counteract the growth caused by 1.0 ppm BAP at its 0.001 to 1.0 ppm concentrations suggesting independent effect of paclobutrazol to that of BAP. Furthermore, the activity of paclobutrazol was tested in corn root curvature test and it was found that PBZ concentrations from 0.001 to 10.0 ppm linearly increased the percentage of corn roots showing more than 90° curvature. Therefore, suggession that PBZ conutracted GA3, induced growih and also as IAA and cytokinin at lower concentration0.001 to 100ppm.

scholarly journals Millimeter-wave center of curvature test for a fast paraboloid

2012 ◽  
Vol 51 (3) ◽  
pp. 316
Author(s):  
Samuel Goldberg ◽  
Stephen Padin
Keyword(s):  
Millimeter Wave ◽  
Curvature Test

scholarly journals JWST optical telescope element center of curvature test

2018 ◽  
Author(s):  
Ritva Keski-Kuha ◽  
Babak N. Saif ◽  
David Chaney ◽  
Kyle Van Gorkom ◽  
Keira Brooks ◽  
...  
Keyword(s):  
Optical Telescope ◽  
Curvature Test

scholarly journals Effect of Abscisic Acid in the Avena Curvature Test

1969 ◽  
Vol 82 (974-975) ◽  
pp. 327-328 ◽  
Author(s):  
Tohru HASHIMOTO ◽  
Saburo TAMURA
Keyword(s):  
Abscisic Acid ◽  
Curvature Test
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