A non-ACC pathway for ethylene biosynthesis in Botrytis cinerea

Qadir, Altaf; Hewett, E.W.; Long, Philip M.; Dilley, David R.

doi:10.1016/j.postharvbio.2011.06.003

Cited by 9 publications

(3 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fruit hormones play a role throughout necrotrophic growth. Thus, Botrytis cinerea infection induced ethylene‐dependent pathways (Chague et al ., ; Qadir et al ., ) as well as ABA, jasmonic acid (JA), and salicylic acid (SA) in a complicated manner in both ripe and unripe tomato fruit (Blanco‐Ulate et al ., ). By contrast, tomato fruits responded to Colletotrichum necrotrophic colonization by an SA‐dependent response that induced programmed cell death, which lead to enhanced necrotrophic colonization (Alkan et al ., , ).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous transcriptome analysis of Colletotrichum gloeosporioides and tomato fruit pathosystem reveals novel fungal pathogenicity and fruit defense strategies

et al. 2014

View full text Add to dashboard Cite

The fungus Colletotrichum gloeosporioides breaches the fruit cuticle but remains quiescent until fruit ripening signals a switch to necrotrophy, culminating in devastating anthracnose disease. There is a need to understand the distinct fungal arms strategy and the simultaneous fruit response. Transcriptome analysis of fungal-fruit interactions was carried out concurrently in the appressoria, quiescent and necrotrophic stages. Conidia germinating on unripe fruit cuticle showed stage-specific transcription that was accompanied by massive fruit defense responses. The subsequent quiescent stage showed the development of dendritic-like structures and swollen hyphae within the fruit epidermis. The quiescent fungal transcriptome was characterized by activation of chromatin remodeling genes and unsuspected environmental alkalization. Fruit response was portrayed by continued highly integrated massive up-regulation of defense genes. During cuticle infection of green or ripe fruit, fungi recapitulate the same developmental stages but with differing quiescent time spans. The necrotrophic stage showed a dramatic shift in fungal metabolism and up-regulation of pathogenicity factors. Fruit response to necrotrophy showed activation of the salicylic acid pathway, climaxing in cell death. Transcriptome analysis of C. gloeosporioides infection of fruit reveals its distinct stage-specific lifestyle and the concurrent changing fruit response, deepening our perception of the unfolding fungal-fruit arms and defenses race.

show abstract

Section: Introductionmentioning

confidence: 99%

Simultaneous transcriptome analysis of Colletotrichum gloeosporioides and tomato fruit pathosystem reveals novel fungal pathogenicity and fruit defense strategies

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Graham & Lindermannn (1980) did not detect ethylene in fungal cultures without methionine supplementation, but they found correlations between ethylene synthesis and the concentration of methionine added to the medium in a range from 2.5 to 10 mM. In most studies (Graham & Linderman 1980;Akhtar et al 2005), methionine was used at concentrations of 5-10 mM, but sometimes higher concentrations were also used (e.g., 35 mM in the culture of Colletotrichum musae) (Qadir et al 1997(Qadir et al , 2011Daundasekera et al 2003). None of the F. culmorum strains tested was capable of producing ethylene without the addition of methionine (data not shown), and its optimal concentration for ethylene synthesis by these strains was 6.6 mM.…”

Section: Discussionmentioning

confidence: 99%

Efficiency of indoleacetic acid, gibberellic acid and ethylene synthesized in vitro by Fusarium culmorum strains with different effects on cereal growth

2014

View full text Add to dashboard Cite

Three different Fusarium culmorum strains having a pathogenic, a deleterious (deleterious rhizosphere microorganism), or a promoting (plant growth promoting fungus) effect on plant growth were studied for their ability to synthesize in vitro the phytohormones indoleacetic acid (IAA), gibberellic acid (GA), and ethylene. All the phytohormones tested were synthesized in cultures supplemented with wide concentration ranges of glucose and tryptophan or methionine (precursors of phytohormone synthesis). The amounts of these secondary metabolites synthesized by the particular strains were found to be significantly different. The non-pathogenic PGPF strain (DEMFc2) synthesized the highest amounts of IAA and GA, a fact that could be responsible for the growth-promoting properties of this strain. A pathogenic strain synthesized the highest amount of ethylene, which could be responsible for the negative effect of this strain on plant growth. F. culmorum isolates with a high capacity for IAA synthesis also have a high capacity for GA synthesis and irrespective of the growth conditions, a high positive correlation (R > 0.9) between the concentrations of synthesized IAA and GA in F. culmorum cultures was found. It is worth mentioning that the optimal conditions for the growth of F. culmorum isolates and the synthesis of the individual phytohormones differed from one another. The optimal growth conditions were 1.0% of glucose and 9.9 mM of methionine or 6.0 mM of tryptophan. The optimal conditions for ethylene synthesis were 0.5% of glucose and 6.6 mM of methionine, whereas 1.0% of glucose and 9.0 mM of tryptophan were optimal for IAA and GA synthesis.

show abstract

“…Besides, and by using some specific inhibitors, these authors demonstrated that B. cinerea does not produce ET by the ACC pathway but mainly through KMBA. This hypothesis was further reinforced by Qadir et al (2011) who demonstrated that this fungus does not require ACC as a precursor but rather utilises an enzyme similar to ACO from plants.…”

Section: Pathogens Have Also the Ability To Produce Ethylenementioning

confidence: 91%

Untangling the role of ethylene beyond fruit development and ripening: A physiological and molecular perspective focused on the Monilinia-peach interaction

Vall‐llaura¹,

Torres²,

Teixidó³

et al. 2022

Scientia Horticulturae

View full text Add to dashboard Cite

A non-ACC pathway for ethylene biosynthesis in Botrytis cinerea

Cited by 9 publications

References 26 publications

Simultaneous transcriptome analysis of Colletotrichum gloeosporioides and tomato fruit pathosystem reveals novel fungal pathogenicity and fruit defense strategies

Simultaneous transcriptome analysis of Colletotrichum gloeosporioides and tomato fruit pathosystem reveals novel fungal pathogenicity and fruit defense strategies

Efficiency of indoleacetic acid, gibberellic acid and ethylene synthesized in vitro by Fusarium culmorum strains with different effects on cereal growth

Untangling the role of ethylene beyond fruit development and ripening: A physiological and molecular perspective focused on the Monilinia-peach interaction

Contact Info

Product

Resources

About