The Effect of Gibberellic Acid on Shoot Growth of Pea Seedlings

Brian, P. W.; Hemming, H. G.

doi:10.1111/j.1399-3054.1955.tb07760.x

Cited by 227 publications

(62 citation statements)

References 7 publications

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“…Gibberellic acid treatment will prevent inhibition of pea stem growth by radiation (in both dwarf and tall varieties) and it will also reverse the dwarf character in peas as well as other species (1,4,8 2 a), but the promotions of growth are equal fractions of maximum growth promotion.…”

Section: Resultsmentioning

confidence: 99%

“…Whether growth inhibition as a result of continuous low intensity irradiations is due exclusively to the red: far-red pigment system is not established. However, it is known that gibberellic acid may prevent stem growtlh inhibition as a result of 1)oth low and high initensity continuous irradiation in this species (1,4).…”

Section: Discussionmentioning

confidence: 99%

“…All experiments reported were repeated 2 or more times with substantially the same results. 1 Received December 11, 1958. 2 Report of work supported in part by the Herman Frasch Foundation.…”

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confidence: 99%

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Studies on the Mechanism of Stem Growth Inhibition by Visible Radiation.

Lockhart¹

1959

Plant Physiol.

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Applied gibberellic acid specifically reverses the light inhibition of etiolated stem growth in certain species (4,5). It ExPERIMENTAL RESULTSTo determine the time-course of growth following a single irradiation, 6-day-old dwarf pea seedlings wvere exposed to re(d ra(liation (2,000 ergs cinv-2-sec-1) for various lengths of time and the height of the plants was measured daily. The results of a typical experiment are illustrated in figure 1. It may be seen that even 10-minutes of irradiation results in a marked inhibition of growth. It is noteworthy that the growth inhibition by light continues for a period of several days. After 4 to 5 days the growth rate of the irradiated plants returns to the dark-grown rate, but the growth rate never exceeds that of the dark-grown plants.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Studies on the Mechanism of Stem Growth Inhibition by Visible Radiation.

Lockhart¹

1959

Plant Physiol.

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“…Both gibberellic acid and gibberellin A markedly stimulate stem and leaf elongation in a number of higher plants." 4 Of particular interest to geneticists is the report of Brian and Hemming4 that slow-growing varieties of peas (Pisum) will respond more than fastgrowing varieties to applications of gibberellic acid. They also reported a similar differential growth response to applications of gibberellic acid between tall and dwarf varieties of broad bean (Vicia) and French bean (Phaseolus), concluding that the causes for dwarfism in these plants are probably the same as those acting in peas.…”

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confidence: 99%

Growth Response of Single-Gene Dwarf Mutants in Maize to Gibberellic Acid

Phinney

1956

Proc. Natl. Acad. Sci. U.S.A.

248

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GENETICS: B. 0. PHINNEY required to reduce the methylene blue. It is clear that the long lag phase observed when methylene blue was present before all the oxygen was removed is due to an inhibition by methylene blue of the systems of the cell which consume oxygen.Summary. Hemming4 that slow-growing varieties of peas (Pisum) will respond more than fastgrowing varieties to applications of gibberellic acid. They also reported a similar differential growth response to applications of gibberellic acid between tall and dwarf varieties of broad bean (Vicia) and French bean (Phaseolus), concluding that VOL. 42, 1956 185

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“…Particular attention was paid to gibberellins; their activity was tested on dwarf peas, lettuce hypocotyls and tomato seedling roots. The first two bioassays are specific for the gibberellins and there is a linear relationship between log dose and log plant response (Brian & Hemming, 1955 ;Frankland & Wareing, 1960). Indolyl-3-acetic acid had no effect in any of these bioassays.…”

Section: E B R O W N a N D S K B U R L I N G H A Mmentioning

confidence: 99%

Production of Plant Growth Substances by Azotobacter chroococcum

Brown

Burlingham

1968

Journal of General Microbiology

106

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S U M M A R YCultures of Azotobacter chroococcum strain A6 were grown for 14 days in a nitrogen-deficient mineral medium, the supernatant fluid and bacteria extracted and examined by paper partition chromatography with two solvent systems which separate authentic gibberellin (GA 3) and indolyl-3-acetic acid (IAA). Gibberellin-like substances were not detected on the chromatograms examined under ultraviolet (u.v.) radiation, but were detected when chromatograms were cut into ten equal strips representing a sequence of RF values and the eluates tested in dwarf pea and lettuce hypocotyl bioassays. Certain eluates applied to the roots of tomato seedlings also altered the later growth of stems, leaves and flowers. The Azotobacter cultures contained three gibberellin-like substances, of which probably the dominant was one with an RF value similar to that of GA 3 ; the other two were not identified. The average concentration of gibberellin/ml. culture was 0.03 pg. GA 3 equivalent. The gibberellins in Azotobacter cultures probably cause the reported effects on plant development and yield when seeds or roots are inoculated with Azotobacter. Plant growth may also be affected by synthesis of further gibberellins in the root zone when the Azotobacter inoculum colonizes developing roots.

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The Effect of Gibberellic Acid on Shoot Growth of Pea Seedlings

Cited by 227 publications

References 7 publications

Studies on the Mechanism of Stem Growth Inhibition by Visible Radiation.

Studies on the Mechanism of Stem Growth Inhibition by Visible Radiation.

Growth Response of Single-Gene Dwarf Mutants in Maize to Gibberellic Acid

Production of Plant Growth Substances by Azotobacter chroococcum

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