Streptomyces scabiei and its toxin thaxtomin A induce scopoletin biosynthesis in tobacco and Arabidopsis thaliana

Lerat, Sylvain; Babana, Amadou Hamadoun; Oirdi, Mohamed El; Hadrami, Abdelbasset El; Daayf, Fouad; Beaudoin, Nathalie; Bouarab, Kamal; Beaulieu, Carole

doi:10.1007/s00299-009-0792-1

Cited by 38 publications

(37 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Susceptible cultivars produce non-uniform deposits of suberin making them less performing against pathogens (Finetti Sialer 1990;Ray and Hammerschmidt 1998). The anti-microbial agents produced by potatoes can be glycoalkaloids (α-chaconin and α-solanine), phenolic compounds and phytoalexins, antimicrobial compounds produced by the plant after pathogen attacks (Okopnyi et al 1983;Lyon 1989;Ray and Hammerschmidt 1998;Zagoskina et al 2006;Baker et al 2008;Lerat et al 2009). Plants also produce inhibitors of virulence factors (Kim et al 2006).…”

Section: Bazan De Segura and Carpio (1974)mentioning

confidence: 97%

Potato soil-borne diseases. A review

Fiers¹,

Edel-Hermann²,

Chatot³

et al. 2011

Agron. Sustain. Dev.

137

View full text Add to dashboard Cite

Potato crop is the fourth main food crop in the world and it will certainly feed a big part of the global population in the next years. The economical outlets for this crop are great; however, numerous diseases either soil-or airborne can cause huge losses in the production. Worldwide, about 40 soil-borne diseases affect potato and cause severe damages especially on tubers, the economically most important part of the plant. The occurrence and development of soilborne diseases depend on very diverse factors affecting either the pathogen or the plant. Favorable conditions for potato diseases development are frequently the same as the conditions needed for potato growth: temperature between 10°C and 25°C, high humidity, medium pH, etc. Adapted cultural practices such as a rotation longer than 4 years, appropriate fertilization and water management, an adapted delay between haulm killing and harvest, and dry and cool conditions for tuber storage are good ways to control potato diseases. In most cases, potato pathogens develop specific survival forms, dissemination ways and host penetration methods. The genetic variability of the pathogens implies the use of adapted diagnostic and control methods. Decision support systems developed to predict yield losses allow choosing good control methods such as the use of healthy seeds, adapted pesticides, cultural practices, and biological control agents for each potato disease. The complexity of the interactions between a pathogen and its host, influenced by biotic and abiotic factors of the environment, make the control of the diseases often very difficult. However, deep knowledge of pathosystems allows setting up integrated pest management systems allowing the production of healthy and good quality potatoes.

show abstract

Section: Bazan De Segura and Carpio (1974)mentioning

confidence: 97%

Potato soil-borne diseases. A review

Fiers¹,

Edel-Hermann²,

Chatot³

et al. 2011

Agron. Sustain. Dev.

137

View full text Add to dashboard Cite

show abstract

“…S. ipomoeae also produces members of the thaxtomin family, the predominant of which is thaxtomin C (King et al 1994), and it appears that these compounds are also important for pathogenicity in this organism (G. Pettis, unpublished data). Thaxtomin induces a variety of phenotypic changes in the plant host including cell hypertrophy, root and shoot stunting, tissue necrosis, inhibition of cellulose (Duval et al 2005;Errakhi et al 2008;Fry and Loria 2002;Leiner et al 1996;Lerat et al 2009;Meimoun et al 2009;Scheible et al 2003;Tegg et al 2005). Recently, it was demonstrated that thaxtomin A reduces crystalline cellulose in the plant cell wall, it affects the expression of genes associated with cell wall synthesis, and it depletes cellulose synthase complexes from Arabidopsis seedling plasma membranes (Bischoff et al 2009).…”

Section: Introductionmentioning

confidence: 97%

What does it take to be a plant pathogen: genomic insights from Streptomyces species

Bignell

Huguet‐Tapia

Joshi

et al. 2010

Antonie van Leeuwenhoek

View full text Add to dashboard Cite

Plant pathogenicity is rare in the genus Streptomyces, with only a dozen or so species possessing this trait out of the more than 900 species described. Nevertheless, such species have had a significant impact on agricultural economies throughout the world due to their ability to cause important crop diseases such as potato common scab, which is characterized by lesions that form on the potato tuber surface. All pathogenic species that cause common scab produce a family of phytotoxins called the thaxtomins, which function as cellulose synthesis inhibitors. In addition, the nec1 and tomA genes are conserved in several pathogenic streptomycetes, the former of which is predicted to function in the suppression of plant defense responses. Streptomyces scabies is the oldest plant pathogen described and has a world-wide distribution, whereas species such as S. turgidiscabies and S. acidiscabies are believed to be newly emergent pathogens found in more limited geographical locations. The genome sequence of S. scabies 87-22 was recently completed, and comparative genomic analyses with other sequenced microbial pathogens have revealed the presence of additional genes that may play a role in plant pathogenicity, an idea that is supported by functional analysis of one such putative virulence locus. In addition, the availability of multiple genome sequences for both pathogenic and nonpathogenic streptomycetes has provided an opportunity for comparative genomic analyses to identify the Streptomyces pathogenome. Such genomic analyses will contribute to the fundamental understanding of the mechanisms and evolution of plant pathogenicity and plant-microbe biology within this genus.

show abstract

“…Scopoletin displays well‐recognized antimicrobial activities against various plant pathogens (Chong et al. 2002; Lerat et al. 2009), and we found that scopoletin, known to be efficient against Gram‐negative bacteria (Cespedes et al.…”

Section: Discussionmentioning

confidence: 93%

Calcium- and ROS-mediated defence responses in BY2 tobacco cells by nonpathogenic Streptomyces sp

Baz

Tran

Kettani-Halabi

et al. 2012

Journal of Applied Microbiology

View full text Add to dashboard Cite

Aims: The early molecular events underlying the elicitation of plant defence reactions by Gram‐positive bacteria are relatively unknown. In plants, calcium and reactive oxygen species are commonly involved as cellular messengers of a wide range of biotic stimuli from pathogenic to symbiotic bacteria. In the present work, we checked whether nonpathogenic Streptomyces sp. strains could induce early signalling events leading to defence responses in BY2 tobacco cell suspensions. Methods and Results: We have demonstrated that nonpathogenic Streptomyces sp. OE7 strain induced a cytosolic Ca2+ increase and a biphasic oxidative burst in the upstream signalling events, leading to defence responses in BY2 tobacco cell suspensions. Streptomyces sp. OE7 also elicited delayed intracellular free scopoletin production and programmed cell death. In agreement with scopoletin production, OE7 induced accumulation of PAL transcripts and increased accumulation of transcripts of EREBP1 and AOX genes that are known to be regulated by the jasmonate/ethylene pathway. Transcript levels of PR1b and NIMIN2α, both salicylic acid pathway–linked genes, were not modified. Moreover, Streptomyces sp. OE7 culture filtrates could reduce Pectobacterium carotovorum‐ and Pectobacterium atrosepticum‐induced death of BY2 cells and soft rot on potato slices. Conclusions: New insights are thus provided into the interaction mechanisms between Streptomyces sp. and plants; Streptomyces sp. could be sensed by plant cells, and through cytosolic Ca2+ changes and the generation of reactive oxygen species, defence responses were induced. Significance and Impact of the Study: These induced defence responses appeared to participate in attenuating Pectobacterium‐induced diseases in plants. Thus, Streptomyces sp. OE7 could be a biocontrol agent against Pectobacterium sp.

show abstract

Streptomyces scabiei and its toxin thaxtomin A induce scopoletin biosynthesis in tobacco and Arabidopsis thaliana

Cited by 38 publications

References 39 publications

Potato soil-borne diseases. A review

Potato soil-borne diseases. A review

What does it take to be a plant pathogen: genomic insights from Streptomyces species

Calcium- and ROS-mediated defence responses in BY2 tobacco cells by nonpathogenic Streptomyces sp

Contact Info

Product

Resources

About