Jazz, good for wheat, wine, and weed.
“The results showed that use of 100 μM methyl jasmonate increase growth period and a number of days until plant physiological maturity. Under drought stress conditions, the number of grains per spike, weight of one thousand seed, grain yield, and harvest index are decreased in every two years of experiment. Also, using 100 μM methyl jasmonate lead to increase these traits by 22.2, 14.4, 8.5, and 11.4%, respectively in Pishtaz cultivar, and 10.3, 10.7, 8.5, and 11.2%, respectively in the Sirvan cultivar compared to the control group. The highest water productivity at each of the three levels of irrigation was related to the concentration of 100 μM methyl jasmonate. According to the results, although drought stress reduced yield and its components, methyl jasmonate was able to compensate somewhat (10%) for the reduced yield due to drought stress. The irrigation cut off at the grain milking stage can be beneficial with increasing water productivity in managing this valuable resource. Also, the use of 100 μM jasmonate in these conditions is recommended as a practical way to increase tolerance to drought stress conditions and improve the growth and yield of wheat.”
“Over the last few years, considerable attention has been paid to the application of elicitors to vineyard. However, research about the effect of elicitors on grape amino acid content is scarce. Therefore, the aim of this study was to evaluate the influence of foliar application of methyl jasmonate on must amino acid content. Results revealed that total amino acid content was not modified by the application of methyl jasmonate. However, the individual content of certain amino acids was increased as consequence of methyl jasmonate foliar application, i.e., histidine, serine, tryptophan, phenylalanine, tyrosine, asparagine, methionine, and lysine. Among them, phenylalanine content was considerably increased; this amino acid is precursor of phenolic and aromatic compounds. In conclusion, foliar application of methyl jasmonate improved must nitrogen composition. This finding suggests that
methyl jasmonate treatment might be conducive to obtain wines of higher quality since must amino acid composition could affect the wine volatile composition and the fermentation kinetics.”
Since these early days of JA research, there has been arapid increase in publications dealing with JA-related aspects (see re-view in[1]), preferentially in aspects of biosynthesis, accumulation andbiotechnological application of secondary compounds.
Nearly all bio-synthetic pathways leading to secondary metabolites, such as antho-cyanins, nicotine, terpenoid indole alkaloids (TIA), glucosinolates (GS),benzophenanthridine alkaloids orflavonoids, were found to be inducedby applied JA or processes triggering an endogenous increase in JA.Pathway analysis was carried out by cloning involved genes, includinganalysis of the corresponding promoters, and studying regulatory as-pects, involved transcription factors (TFs), as well as cell and tissue-specificity . This research has been extensively reviewed, e.g.,[4–7]including aspects of jasmonates[8–11] or synthetic biology[12].In the following text, we briefly review the formation of a fewsecondary metabolites, such as anthocyanin, nicotine, TIA, artemisininand GS, with an emphasis on the role of JA, describe the TFs involvedand discuss some applied aspects using artemisinin as an example.Secondary metabolites are formed using primary metabolites asbuilding blocks. Thus, the role of JA is discussed in terms of (i) JAperception and the core signaling complex, (ii) its role in reprogram-ming primary metabolism, and (iii)
its role in the synthesis of secondarymetabolites. Usually, these signaling cascades occur in a tissue- andcell-specific manner because some secondary metabolites are formedexclusively in specialized cells, such as trichomes, or under specificconditions of growth in cell suspension cultures. The following reviewwill be a brief overview for some JA-inducible secondary compounds.Owing to space limitations, only key references are included in thisbrief
