The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Robert Winkler - One of the best experts on this subject based on the ideXlab platform.
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modulation of steroidal glycoalkaloid biosynthesis in tomato solanum lycopersicum by Jasmonic Acid
Plant Science, 2018Co-Authors: Josaphat Miguel Monterovargas, Kena Casarrubiascastillo, Norma A Martinezgallardo, Jose Juan Ordazortiz, John Paul Delanofrier, Robert WinklerAbstract:Abstract Jasmonic Acid (JA) is a phytohormone involved in plant development and defense. A major role of JA is the enhancement of secondary metabolite production, such as response to herbivory. Systemin is a bioactive plant peptide of 18 amino Acids that contributes to the induction of local and systemic defense responses in tomato (Solanum lycopersicum) through JA biosynthesis. The overexpression of systemin (PS-OE) results in constitutive JA accumulation and enhances pest resistance in plants. Conversely, mutant plants affected in linolenic Acid synthesis (spr2) are negatively compromised in the production of JA which favors damage and oviposition by insect herbivores. With undirected mass fingerprinting analyses, we found global metabolic differences between genotypes with modified Jasmonic Acid production. The spr2 mutants were enriched in di-unsaturated fatty Acids and generally showed more changes. The PS-OE genotype produced an unidentified compound with a mass-to-charge ratio of 695 (MZ695). Most strikingly, the steroidal glycoalkaloid biosynthesis was negatively affected in the spr2 genotype. Complementation with Jasmonic Acid could restore the tomatine pathway, which strongly suggests the control of steroidal glycoalkaloid biosynthesis by Jasmonic Acid. spr2 plants were more susceptible to fungal infection with Fusarium oxysporum f.sp. ciceris, but not to bacterial infection with Clavibacter michiganensis subsp. michiganensis which supports the involvement of steroidal glycoalkaloids in the plant response against fungi.
A. May - One of the best experts on this subject based on the ideXlab platform.
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Jasmonic Acid and K-Phosphite Enhance Productivity and Technological Quality of Sugarcane Crop
Journal of Agricultural Science, 2019Co-Authors: Bruno Rafael De Almeida Moreira, Ronaldo Da Silva Viana, Lucas Aparecido Manzani Lisboa, P. R. M. Lopes, Paulo Alexandre Monteiro De Figueiredo, Sérgio Bispo Ramos, C. S. B. Bonini, Vanessa Dias Rezende Trindade, M. G. O. Andrade, A. MayAbstract:Plant resistance inducers are cost-effective and environmentally pleasing strategies of plant protection to mitigate biotic and abiotic agents threatening food safety and energy security. We, accordingly, present Jasmonic Acid and k-phosphite as low-cost strategies to enhance productive yield and technological quality of sugarcane crop. Exogenously treatment of the sugarcane variety ‘SP81-3250’ consisted of carrying out foliar application of Jasmonic Acid at 1, 1.5 and 2 ml L-1 and K-phosphite at 2, 4 and 6 ml L-1 before crop flowering. Interestingly, both systemic phytorregulator and foliar fertilizer at the lowest doses significantly improved contents of total soluble solids and sucrose, as well as productive yield of fermentable sugars. Jasmonic Acid could promote growth and development by triggering either non-enzymatic or enzymatic mechanisms in the host self-defense system to support of external stresses, including herbivory by sugarcane-borer. K-phosphite could improve crop performance by not only releasing water-soluble inorganic ions like phosphorus and potash, but also by signaling synthesis of phytoalexins. Purity of cane juice and productivity of stalks sharply decreased, as the doses of the plant-resistance inducers increased. Jasmonic Acid and k-phosphite at unbalanced endogenous levels could inhibit physiological ripening and specific enzymatical activity of alkaline invertases and sucrose-phosphate synthase, thereby influencing bioavailability of sucrose. The lower the sucrose content, the poorer the technological quality of sugarcane crop. The conclusion is, therefore, Jasmonic Acid and K-phosphite at lower doses prove to be effective induced resistance techniques to produce richer feedstock, with potential to produce ethanol fuel and refined sugar in sugar-energy plants.
May A. - One of the best experts on this subject based on the ideXlab platform.
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Jasmonic Acid and K-phosphite enhance productivity and technological quality of sugarcane crop.
Journal of Agricultural Science v. 11 n. 14 p. 254-264 2019., 2019Co-Authors: Moreira B. R. De A., Viana R. Da S., Lisboa L. A. M., Lopes P. R. M., Figueiredo P. A. M., Ramos S. B., Bonini C. S. B., Trindade V. D. R., Andrade M. G. De O., May A.Abstract:Abstract: Plant resistance inducers are cost-effective and environmentally pleasing strategies of plant protection to mitigate biotic and abiotic agents threatening food safety and energy security. We, accordingly, present Jasmonic Acid and k-phosphite as low-cost strategies to enhance productive yield and technological quality of sugarcane crop. Exogenously treatment of the sugarcane variety SP81-3250 consisted of carrying out foliar application of Jasmonic Acid at 1, 1.5 and 2 ml L-1 and K-phosphite at 2, 4 and 6 ml L-1 before crop flowering. Interestingly, both systemic phytorregulator and foliar fertilizer at the lowest doses significantly improved contents of total soluble solids and sucrose, as well as productive yield of fermentable sugars. Jasmonic Acid could promote growth and development by triggering either non-enzymatic or enzymatic mechanisms in the host self-defense system to support of external stresses, including herbivory by sugarcane-borer. K-phosphite could improve crop performance by not only releasing water-soluble inorganic ions like phosphorus and potash, but also by signaling synthesis of phytoalexins. Purity of cane juice and productivity of stalks sharply decreased, as the doses of the plant-resistance inducers increased. Jasmonic Acid and k-phosphite at unbalanced endogenous levels could inhibit physiological ripening and specific enzymatical activity of alkaline invertases and sucrose-phosphate synthase, thereby influencing bioavailability of sucrose. The lower the sucrose content, the poorer the technological quality of sugarcane crop. The conclusion is, therefore, Jasmonic Acid and K-phosphite at lower doses prove to be effective induced resistance techniques to produce richer feedstock, with potential to produce ethanol fuel and refined sugar in sugar-energy plants.bitstream/item/206347/1/May-Jasmonic-Acid-2019.pd
Josaphat Miguel Monterovargas - One of the best experts on this subject based on the ideXlab platform.
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modulation of steroidal glycoalkaloid biosynthesis in tomato solanum lycopersicum by Jasmonic Acid
Plant Science, 2018Co-Authors: Josaphat Miguel Monterovargas, Kena Casarrubiascastillo, Norma A Martinezgallardo, Jose Juan Ordazortiz, John Paul Delanofrier, Robert WinklerAbstract:Abstract Jasmonic Acid (JA) is a phytohormone involved in plant development and defense. A major role of JA is the enhancement of secondary metabolite production, such as response to herbivory. Systemin is a bioactive plant peptide of 18 amino Acids that contributes to the induction of local and systemic defense responses in tomato (Solanum lycopersicum) through JA biosynthesis. The overexpression of systemin (PS-OE) results in constitutive JA accumulation and enhances pest resistance in plants. Conversely, mutant plants affected in linolenic Acid synthesis (spr2) are negatively compromised in the production of JA which favors damage and oviposition by insect herbivores. With undirected mass fingerprinting analyses, we found global metabolic differences between genotypes with modified Jasmonic Acid production. The spr2 mutants were enriched in di-unsaturated fatty Acids and generally showed more changes. The PS-OE genotype produced an unidentified compound with a mass-to-charge ratio of 695 (MZ695). Most strikingly, the steroidal glycoalkaloid biosynthesis was negatively affected in the spr2 genotype. Complementation with Jasmonic Acid could restore the tomatine pathway, which strongly suggests the control of steroidal glycoalkaloid biosynthesis by Jasmonic Acid. spr2 plants were more susceptible to fungal infection with Fusarium oxysporum f.sp. ciceris, but not to bacterial infection with Clavibacter michiganensis subsp. michiganensis which supports the involvement of steroidal glycoalkaloids in the plant response against fungi.
Lam-son Phan Tran - One of the best experts on this subject based on the ideXlab platform.
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Jasmonic Acid at the Crossroads of Plant Immunity and Pseudomonas syringae Virulence.
International journal of molecular sciences, 2020Co-Authors: Aarti Gupta, Mamta Bhardwaj, Lam-son Phan TranAbstract:Sensing of pathogen infection by plants elicits early signals that are transduced to affect defense mechanisms, such as effective blockage of pathogen entry by regulation of stomatal closure, cuticle, or callose deposition, change in water potential, and resource acquisition among many others. Pathogens, on the other hand, interfere with plant physiology and protein functioning to counteract plant defense responses. In plants, hormonal homeostasis and signaling are tightly regulated; thus, the phytohormones are qualified as a major group of signaling molecules controlling the most widely tinkered regulatory networks of defense and counter-defense strategies. Notably, the phytohormone Jasmonic Acid mediates plant defense responses to a wide array of pathogens. In this review, we present the synopsis on the Jasmonic Acid metabolism and signaling, and the regulatory roles of this hormone in plant defense against the hemibiotrophic bacterial pathogen Pseudomonas syringae. We also elaborate on how this pathogen releases virulence factors and effectors to gain control over plant Jasmonic Acid signaling to effectively cause disease. The findings discussed in this review may lead to ideas for the development of crop cultivars with enhanced disease resistance by genetic manipulation.