Of the over 600 oxylipins present in all plants, the phytohormone jasmonic acid (JA) remains the best understood in terms of its biosynthesis, function and signaling. Much like their eicosanoid analogues in mammalian system, evidence is growing for the role of the other oxylipins in diverse physiological processes. JA serves as the model plant oxylipin species and regulates defense and developm...

Antagonism between the defense hormones salicylic acid (SA) and jasmonic acid (JA) plays a central role in the modulation of the plant immune signaling network, but the molecular mechanisms underlying this phenomenon are largely unknown. Here, we demonstrate that suppression of the JA pathway by SA functions downstream of the E3 ubiquitin-ligase Skip-Cullin-F-box complex SCF(COI1), which target...

We investigated the role of polyamines (PAs) in lima bean (Phaseolus lunatus) leaves on the production of herbivorous mite (Tetranychus urticae)-induced plant volatiles that attract carnivorous natural enemies of the herbivores. To do this, we focused on the effects of the exogenous PAs [cadaverine, putrescine, spermidine and spermine (Spm)] on the production of volatiles, H(2)O(2) and jasmonic...

Antud kokkuvõte on koostatud peamiselt artiklite Gionis et al. [2007] ja Hanhijärvi et al. [2009] põhjal ja käsitleb andmekaeve tulemuste huvitavuse või olulisuse hindamist. Andmekaeve ülesanne on otsida suurtest andmemassiividest kasulikku informatsiooni ja seoseid, mis võimaldaks uuritavatest andmetest paremini aru saada ja teha nende põhjal intelligentsemaid otsuseid. Üks võimalus taolist in...

This research was carried out to determine the effect of Jerusalem artichoke (JA) with or without 5, 10% vetch (V) supplementation on performance, egg quality characteristics and egg cholesterol content. In the study, seventy-five 25 weeks-old commercial white laying hens were randomly divided into one control and 4 treatment groups each containing 15 hens. Control group was fed basal diet with...

Induced plant defenses against herbivores are modulated by jasmonic acid-, salicylic acid-, and ethylene-signaling pathways. Although there is evidence that some pathogens suppress plant defenses by interfering with the crosstalk between different signaling pathways, such evidence is scarce for herbivores. Here, we demonstrate that the mealybug Phenacoccus solenopsis suppresses the induced defe...

Oxylipins of the jasmonate family are active as signals in plant responses to biotic and abiotic stresses as well as in development. Jasmonic acid (JA), its precursor cis-12-oxo-phytodienoic acid (OPDA) and the isoleucine conjugate of JA (JA-Ile) are the most prominent members. OPDA and JA-Ile have individual signalling properties in several processes and differ in their pattern of gene express...

Tekniikan kiivas kehitys eri toimialoilla johdattanut tilanteeseen, jossa yritysten ydinosaamisalueet ovat erikoistuneet voimakkaasti. Globalisaation seurauksena kilpailu yritysten kesken on voimistunut logististen rajoitusten hävittyä. Verkostoitumiskyky sekä yritysten muodostamien liiketoimintaverkostojen hallinta nousevat tärkeäksi osaksi yritysten liiketoimintastrategiaa ja kilpailukykyä. S...

Green leaf volatiles (GLV) prime plants against insect herbivore attack resulting in stronger and faster signaling by jasmonic acid (JA). In maize this response is specifically linked to insect elicitor (IE)-induced signaling processes, which cause JA accumulation not only around the damage site, but also in distant tissues, presumably through the activation of electrical signals. Here, we pres...

The T early a (TEA) promoter in the murine Tcra locus generates noncoding transcripts that extend across the 65kb Ja array. Here, we have analyzed the significance of TEA transcription for Tcra locus regulation through the targeted introduction of a transcription terminator downstream of the TEA promoter. We demonstrate that noncoding transcription driven by this single promoter can instruct bo...