2009
DOI: 10.1534/genetics.109.107102
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A Combinatorial Interplay Among the 1-Aminocyclopropane-1-Carboxylate Isoforms Regulates Ethylene Biosynthesis inArabidopsis thaliana

Abstract: Ethylene (C 2 H 4 ) is a unique plant-signaling molecule that regulates numerous developmental processes. The key enzyme in the two-step biosynthetic pathway of ethylene is 1-aminocyclopropane-1-carboxylate synthase (ACS), which catalyzes the conversion of S-adenosylmethionine (AdoMet) to ACC, the precursor of ethylene. To understand the function of this important enzyme, we analyzed the entire family of nine ACS isoforms (ACS1, ACS2, ACS4-9, and ACS11) encoded in the Arabidopsis genome. Our analysis reveals t… Show more

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Cited by 280 publications
(327 citation statements)
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“…Eventually, ethylene-insensitive mutants 233 age and show senescence, suggesting that ethylene controls both the rate and timing of leaf 234 senescence (Grbic & Bleecker, 1995). Delayed senescence and concomitant decline in chlorophyll 235 content and photosynthesis has also been observed in antisense plants for ACO of tomato (Picton et 236 al., 1993;John et al, 1995;Jensen & Veierskov, 1998) and acs6 mutants of the C4 plant maize 237 (Young et al, 2004), but not for acs mutants of Arabidopsis (Tsuchisaka et al, 2009 (Lanahan et al, 1994). In general, we conclude that a temporal 243 exposure to ethylene stimulates leaf senescence in mature leaves, while continuous exposure 244 instead causes altered leaf development.…”
mentioning
confidence: 50%
“…Eventually, ethylene-insensitive mutants 233 age and show senescence, suggesting that ethylene controls both the rate and timing of leaf 234 senescence (Grbic & Bleecker, 1995). Delayed senescence and concomitant decline in chlorophyll 235 content and photosynthesis has also been observed in antisense plants for ACO of tomato (Picton et 236 al., 1993;John et al, 1995;Jensen & Veierskov, 1998) and acs6 mutants of the C4 plant maize 237 (Young et al, 2004), but not for acs mutants of Arabidopsis (Tsuchisaka et al, 2009 (Lanahan et al, 1994). In general, we conclude that a temporal 243 exposure to ethylene stimulates leaf senescence in mature leaves, while continuous exposure 244 instead causes altered leaf development.…”
mentioning
confidence: 50%
“…Otherwise, plants growing at higher latitudes might have adapted to cooler climates and therefore show a lower activation point for heat-induced petiole elongation (Koini et al, 2009;van Zanten et al, 2009). It is worthwhile to note here that mutations in the ACS gene family also affect FLC expression and FT (Tsuchisaka et al, 2009). Some mutations tend to induce flowering while others, concomitant with a decrease in ethylene production, seem to delay flowering.…”
Section: Discussion Phenotypic and Geographic Variationmentioning
confidence: 93%
“…The low significance might be due to redundancy and/or the Col-0 genetic background. Indeed, the PL and the PL/LL in an acs octuple mutant and in an ethylene insensitive mutant, ein2-1 (Alonso et al, 1999;Tsuchisaka et al, 2009), were significantly reduced, although concomitant with a reduction in LL (Fig. 3I).…”
Section: Validation Of Acs11 Regulating Leaf Morphologymentioning
confidence: 94%
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“…6). Paralogues of ACC synthase in seed plants are differentially regulated in response to varying developmental or environmental stimuli 19 . Thus, it is plausible that the expansion of the ACC synthase family was coupled with the origin of ACC oxidase in seed plants to create a regulated ethylene biosynthetic pathway.…”
Section: Resultsmentioning
confidence: 99%