scholarly journals The effect of light and heat on 4CH and 200CH potencies of gibberellic acid as a promoter of germination in barley seed (Hordeum vulgare), measured by a germination index

2002 ◽  
Author(s):  
◽  
Hayley Pieterse
Keyword(s):  
Hordeum Vulgare ◽  
Seed Germination ◽  
Gibberellic Acid ◽  
Germination Index ◽  
Barley Seed ◽  
Effect Of Light

The purpose of this investigation was to evaluate the effects of light and heat on homoeopathic dilutions of gibberellic acid (cHGA3) as measured on Hordeum vulgare (barley) seed germination.

scholarly journals The effect of camphor, naphthalene (moth balls), and electromagnetic radiation on 4cH and 200cH homoeopathic potencies of gibberellic acid and their subsequent ability to promote germination of barley seed (Hordeum Vulgare), as measured by a germination index

2002 ◽  
Author(s):  
◽  
Claire Stubbs
Keyword(s):  
South Africa ◽  
Hordeum Vulgare ◽  
Gibberellic Acid ◽  
Electromagnetic Radiation ◽  
Germination Index ◽  
Barley Seed ◽  
Cellular Phones ◽  
Western Cape

This study investigated the effect of camphor, naphthalene (mothballs), cellular phones and televisions on 4cH and 200cH homoeopathic dilutions of gibberellic acid (GA3).The ability of treated dilutions to promote germination of barley seed, (Hordeum vulgare cv. Stirling, ex Sensako, Western Cape, South Africa, 2000 harvest) was measured by a germination index.

scholarly journals The effect of light and heat on 4CH and 200CH potencies of gibberellic acid as a promoter of germination in barley seed (Hordeum vulgare), measured by a germination index

1999 ◽  
Author(s):  
◽  
Theodorus Hendrik Kruger
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Hordeum Vulgare ◽  
Gibberellic Acid ◽  
Chronic Low Back Pain ◽  
Spinal Manipulation ◽  
Cellular Responses ◽  
Germination Index ◽  
Low Back ◽  
Effect Of Light

A search of the literature failed to reveal previous studies performed to determine the effect of spinal manipulation in chronic low back pain sufferers, in terms of clinical and immune cellular responses. Previous studies have dealt with either clinical or immune cellular responses but not both in the same study

The effect of sodium hypochlorite, gibberellic acid, and light on seed dormancy and germination of wild buckwheat (Polygonum convolvulus) and cow cockle (Saponaria vaccaria)

1979 ◽  
Vol 57 (16) ◽  
pp. 1735-1739 ◽  
Author(s):  
A. I. Hsiao
Keyword(s):  
Seed Germination ◽  
Gibberellic Acid ◽  
Sodium Hypochlorite ◽  
Seed Coat ◽  
Inhibitory Effect ◽  
Promoting Effect ◽  
Wild Buckwheat ◽  
Polygonum Convolvulus ◽  
Effect Of Light ◽  
Main Factor

Seed germination of wild buckwheat (Polygonum convolvulus L.) and cow cockle (Saponaria vaccaria L.) increased with increasing time of immersion in 6% sodium hypochlorite (NaOCl). Maximum germination was obtained at 6 to 8 h for wild buckwheat and at 2 h for cow cockle. The effect of NaOCl treatment of wild buckwheat seeds mimics the effect of acid scarification. Wild buckwheat germination was not influenced by light and (or) gibberellic acid (GA3). To induce 50% germination (t½) of cow cockle NaOCl treatments of 0.5 and 1 h were required for seeds incubating in the dark and light, respectively. Once the seed coat was made more permeable by NaOCl, both the promoting effect of GA3 and the inhibitory effect of light were increased. When the optimum effect of NaOCl occurred, all the seeds germinated. However, prolonged NaOCl treatment resulted in either poor germination or seed disintegration.The hard coat seems to be the main factor in regulating wild buckwheat seed germination. Cow cockle, however, is regulated by at least two other factors, light and hormones, in addition to seed coat.

Effect of Alachlor, Propachlor, and Prynachlor on GA3-induced Production of Protease and α-Amylase

Weed Science ◽  
1976 ◽  
Vol 24 (6) ◽  
pp. 616-618 ◽  
Author(s):  
V. Sivaji Rao ◽  
William B. Duke
Keyword(s):  
Nucleic Acid ◽  
Hordeum Vulgare ◽  
Seed Germination ◽  
Gibberellic Acid ◽  
Actinomycin D ◽  
Acid Synthesis ◽  
Seedling Development ◽  
Amylase Production ◽  
Nucleic Acid Synthesis Inhibitors ◽  
Germination And Growth

Alachlor [2-chloro-2′,6′-diethyl-N(methoxymethyl)-acetanilide], propachlor (2-chloro-N-isopropylacetanilide) and prynachlor [2-chloro-N-(1-methyl-2-propynyl)acetanilide], inhibited gibberellic acid (GA3),-induced production of protease and α-amylase in deembryonated barley (Hordeum vulgareL, ‘Schuyler’) seed. Production of protease was more sensitive to these herbicides than α-amylase. The degree of inhibition of protease and α-amylase production caused by alachlor was equivalent to that caused by cycloheximide, puromycin and actinomycin-D, known protein and nucleic acid synthesis inhibitors. Higher GA3concentrations reversed the inhibition of protease and α-amylase synthesis caused by alachlor but did not reduce the effect of alachlor on barley seed germination and growth. It is concluded that the inhibition of protease and α-amylase production by alachlor is perhaps only one of several effects on early seed germination and seedling development.

scholarly journals The effect of ultra high dilutions of gibberellic acid on the synthesis of a-amylase in de-embryonated halves of barley seed (Hordeum vulgare stirling)

1999 ◽  
Author(s):  
◽  
Richard Steele
Keyword(s):  
South Africa ◽  
Hordeum Vulgare ◽  
Gibberellic Acid ◽  
Biological Effect ◽  
Theory And Practice ◽  
Barley Seed ◽  
Western Cape ◽  
High Dilutions

This study investigated the effect of ultra high dilutions of gibberellic acid (GA3) on the synthesis of the enzyme a-amylase in de-embryonated endosperm halves of barley seed (Hordeum vulgare cv. Stirling, ex Caledon, Western Cape, South Africa, 1998 harvest), in order to determine whether such dilutions are capable of producing a biological effect or not. Homoeopathic theory and practice proposes that such dilutions are capable of such effects (Gaier 1991 :445-447).

scholarly journals (404) Effect of Seed Source, Light during Germination, and Cold-moist Stratification on Seed Germination in Three Species of Echinacea

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1062E-1062
Author(s):  
Fredy R. Romero ◽  
Kathleen Delate ◽  
David J. Hannapel
Keyword(s):  
Seed Germination ◽  
Gibberellic Acid ◽  
Seed Dormancy ◽  
Organic Production ◽  
Seed Source ◽  
Seed Treatments ◽  
Medicinal Species ◽  
Effect Of Light

With the increase in popularity of echinacea as a botanical supplement, organic production of this herb continues to grow. Echinacea seeds typically show a high percentage of dormancy that can be broken by ethephon or gibberellic acid, but these methods are not accepted in organic production. We examined in three experiments the effects of varying seed source and germination conditions on echinacea growth. To determine the efficacy of nonchemical treatments, we evaluated the effect of light with and without cold-moist stratification on seed germination of the three most important medicinal species of echinacea, E. angustifolia, E. purpurea, and E. pallida. We used cold-moist stratification under 24 h light, 24 h dark, and 16/8 h (light/dark) to break seed dormancy. We found that germination was enhanced in seeds from a commercial organic seed source, compared to a public germoplasm source. When seeds were not cold-moist stratified, light increased germination in E. angustifolia only, suggesting differential dormancy among the three species. We found that when seeds were cold-moist stratified under 16–24 h of light for 4 weeks, the percentage and rate of germination increased 10% over the control, suggesting this method as an alternative to chemical seed treatments.

Germination in Photosensitive Seeds: Does Phytochrome Stimulate Metabolism of GA19 and GA20 to GA1?

1997 ◽  
Vol 24 (3) ◽  
pp. 389 ◽  
Author(s):  
Julie A. Plummer ◽  
Catherine J. McChesney ◽  
David T. Bell
Keyword(s):  
Seed Germination ◽  
Gibberellic Acid ◽  
White Light ◽  
Red Light ◽  
Biosynthesis Inhibitor ◽  
Reduced Light ◽  
Ga Biosynthesis ◽  
Effect Of Light

The effect of light on gibberellic acid (GA) metabolism was investigated in Asteraceae seeds. White light (80 mmol m-2 s-1 PAR) increased seed germination in Craspedia sp., Erymophyllum ramosum and Rhodanthe chlorocephala subsp. splendida compared with darkness. In these taxa, red light (R, 640 nm, 8 mmol m-2 s-1) stimulated and far red light (FR, 720 nm, 4 mmol m-2 s-1) inhibited germination, indicating the involvement of phytochrome. Paclobutrazol, a GA biosynthesis inhibitor, reduced light-stimulated germination and this was overcome by exogenous GA3. GA3 and GA1 promoted germination in the dark, but GA19 and GA20, which are precursors to GA1, generally did not. GAs were applied to paclobutrazol-treated seeds which were incubated under either R or FR. Very few paclobutrazol-treated seeds germinated without GAs under FR, and exposure to R only marginally improved germination. Application of GA19 or GA20 to paclobutrazol-treated seeds increased germination in Rhodanthe chlorocephala subsp. splendida under R, with no germination under FR. This trend was observed in Craspedia sp., but not in Erymophyllum ramosum or Rhodanthe floribunda. CGA 163′935, a 3b-hydroxylation inhibitor, and R and FR were used to investigate phytochrome-stimulated conversion of GA19 and GA20 to GA1. It could not be shown that R was required for 3b-hydroxylation in light stimulated germination of these species.

Homeopathically prepared gibberellic acid and barley seed germination

Homeopathy ◽  
2003 ◽  
Vol 92 (3) ◽  
pp. 140-144 ◽  
Author(s):  
B Hamman ◽  
G Koning ◽  
K Him Lok
Keyword(s):  
Seed Germination ◽  
Gibberellic Acid ◽  
Barley Seed
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