Developmental regulation of the expression of 1-aminocyclopropane-1-carboxylic acid (ACC) synthase and ACC oxidase genes in hypocotyls of etiolated mung bean seedlings

Song, Ju-Dong; Kim, Jin Hong; Lee, Dong-Hee; Rhew, Tae Hyong; Cho, Sung Ho; Lee, Choon-Hwan

doi:10.1016/j.plantsci.2004.11.015

Cited by 10 publications

(9 citation statements)

References 19 publications

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“…This has also been reported for mung bean cuttings (Geneve and Heuser 1982;Song et al 2005). We have measured ethylene levels in the head space of taped culture containers and found a strong increase of ethylene when NAA had been added to the medium (data not shown).…”

Section: Discussionsupporting

confidence: 83%

“…First, cuttings may themselves produce large amounts of ethylene in response to the auxin treatment (for mung bean cuttings: Geneve and Heuser 1982). In mung bean it has also been found that genes involved in ethylene synthesis, are upregulated by auxin (Song et al 2005). Second, in the portion of the stem from where the roots regenerate, ethylene may be trapped when this portion is immersed: because gases do not diffuse easily through water, ethylene may accumulate to high levels in immersed tissues (Jackson 1985).…”

Section: Introductionmentioning

confidence: 99%

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Ethylene and rooting of mung bean cuttings. The role of auxin induced ethylene synthesis and phase-dependent effects

Klerk

Hanecakova

2008

Plant Growth Regul

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We have re-examined the role of ethylene during rooting of mung bean cuttings. Cuttings were treated for 5 days with a low or a high concentration of NAA (naphthaleneacetic acid). During this 5 days period, we also applied STS (silverthiosulfate, an inhibitor of ethylene action) or ACC (1-aminocyclopropane-l-carboxylic acid, a direct precursor of ethylene). At high NAA concentration, STS promoted and ACC inhibited rooting, respectively. At low NAA concentration, the effects were opposite, STS being inhibitory and ACC promotive. AVG (aminoethoxyvinylglycine, an inhibitor of ethylene synthesis) gave similar results as STS. Together, these data suggest supraoptimal and suboptimal ethylene levels in the tissue at high and low NAA concentration, respectively. We also examined whether the effect of ethylene varied during the successive phases of the rooting process. Thus, we gave 24 h pulses with either STS or ACC during the rooting treatment. During the first two days (0-48 h), ACC-pulses were promotive and STS-pulses inhibitory. Later on (48-168 h), the ACC-pulses were inhibitory and the STS-pulses promotive. Whether this effect was observed or not was dependent on the NAA concentration. These data indicate that ethylene promotes or inhibits rooting depending on the stage in the rooting process. When ACC was added only during the initial period, rooting was increased at all NAA concentrations in a NAA dose-response curve and the optimal NAA concentration remained the same. This suggests that ethylene renders more cells responsive to NAA.

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Section: Discussionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Ethylene and rooting of mung bean cuttings. The role of auxin induced ethylene synthesis and phase-dependent effects

Klerk

Hanecakova

2008

Plant Growth Regul

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“…In turn, in etiolated hypocotyls of Vigna radiata, IAA increases the expression of VR-ACO2, while having no effect on the level of accumulation of the VR-ACO1 transcript (Yu et al 1998). Nevertheless, application of another concentration of IAA in further studies resulted in an increased transcriptional activity of both the genes studied (Song et al 2005).…”

Section: Discussionmentioning

confidence: 92%

“…However, changes in the gene's transcriptional activity did not correlate with the enzymatic activity of its product. In turn, a slight drop in the level of the VR-ACO2 transcript and the constant transcriptional activity of VR-ACO1 were observed in the hypocotyls of etiolated V. radiata seedlings after they were exposed to light (Song et al 2003).…”

Section: Discussionmentioning

confidence: 98%

“…ACC oxidase genes, whose expression is regulated by light, were also identified in the seedlings of Phaseolus vulgaris (Pidgeon et al 1997), Stellaria longipes (Kathiresan et al 1996), Sorghum bicolor (Finlayson et al 1999) and Vigna radiata (Song et al 2003). In S. longipes cultivated under the LD conditions, cyclic changes were found in the level of mRNA of the gene encoding for ACC oxidase, which were correlated with the enzymatic activity of the protein (Kathiresan et al 1996).…”

Section: Discussionmentioning

confidence: 99%

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The role of PnACO1 in light- and IAA-regulated flower inhibition in Pharbitis nil

et al. 2012

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In this study, the first ACC oxidase (PnACO1) cDNA from model short-day plant Pharbitis nil was isolated. The expression pattern of PnACO1 was studied under different conditions (photoperiod and auxin), an adequate balance of which determines P. nil flowering. It was shown that the gene was transcribed in all the examined organs of the 5-day-old seedling and was strongly activated by auxin. Our results also revealed that PnACO1 transcript accumulation in the cotyledons showed diurnal oscillations under both LD and SD conditions. On the basis of presented and previously obtained data, we suggest that flowering inhibition evoked by IAA in P. nil results from its stimulatory effect on both ACC synthase and oxidase gene expression and, consequently, enhances ethylene production.

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The Fate of ACC in Higher Plants

Dorling

McManus

2012

Annual Plant Reviews Volume 44

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Developmental regulation of the expression of 1-aminocyclopropane-1-carboxylic acid (ACC) synthase and ACC oxidase genes in hypocotyls of etiolated mung bean seedlings

Cited by 10 publications

References 19 publications

Ethylene and rooting of mung bean cuttings. The role of auxin induced ethylene synthesis and phase-dependent effects

Ethylene and rooting of mung bean cuttings. The role of auxin induced ethylene synthesis and phase-dependent effects

The role of PnACO1 in light- and IAA-regulated flower inhibition in Pharbitis nil

The Fate of ACC in Higher Plants

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