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Publikationen - Molekulare Signalverarbeitung

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Bücher und Buchkapitel

Flores, R.; Gago-Zachert, S.; Serra, P.; De la Peña, M.; Navarro, B.; Chrysanthemum Chlorotic Mottle Viroid (Hadidi, A., et al., eds.). 331-338, (2017) DOI: 10.1016/B978-0-12-801498-1.00031-0

Chrysanthemum chlorotic mottle viroid (CChMVd) (398–401 nt) belongs to genus Pelamoviroid, family Avsunviroidae and, like other members of this family, replicates in plastids through a rolling-circle mechanism involving hammerhead ribozymes. CChMVd RNA adopts a branched conformation stabilized by a kissing-loop interaction, resembling peach latent mosaic viroid in this respect. Chrysanthemum is the only natural and experimental host for CChMVd, which in the most sensitive varieties induces leaf mottling and chlorosis, delay in flowering, and dwarfing. The viroid has been found in major chrysanthemum growing areas including Europe and Asia. There are natural variants in which the change (UUUC→GAAA) mapping at a tetraloop in the CChMVd branched conformation is sufficient to change the symptomatic phenotype into a nonsymptomatic one without altering the viroid titer. Preinfection with nonsymptomatic variants prevents challenge inoculation with symptomatic ones. Moreover, experimental coinoculation with symptomatic and nonsymptomatic CChMVd variants results in symptomless phenotypes only when the latter is in vast excess, thus indicating its lower fitness.
Bücher und Buchkapitel

Dorka, R.; Miersch, O.; Hause, B.; Weik, P.; Wasternack, C.; Chronobiologische Phänomene und Jasmonatgehalt bei Viscum album L. 49-66, (2009)

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Bücher und Buchkapitel

Wasternack, C.; Hause, B.; Stenzel, I.; Goetz, S.; Feussner, I.; Miersch, O.; Jasmonate signaling in tomato – The input of tissue-specific occurrence of allene oxide cyclase and JA metabolites (Benning C., Ollrogge, J.). 107-111, (2007)

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Bücher und Buchkapitel

Flores, R.; Carbonell, A.; De la Peña, M.; Gago, S.; RNAs Autocatalíticos: Ribozimas de Cabeza de Martillo 407-425, (2007)

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Publikation

Vigliocco, A.; Bonamico, B.; Alemano, S.; Miersch, O.; Abdala, G.; Stimulation of jasmonic acid production in Zea Mays L. infected by the maize rough dwarf virus - Río Cuarto. Reversion of symptoms by salicylic acid Biocell 26, 369-374, (2002)

In the present paper we study the possible biological relevance of endogenous jasmonic acid (JA) and exogenous salicylic acid (SA) in a plant-microbial system maize-virus. The virus disease "Mal de Río Cuarto" is caused by the maize rough dwarf virus - Río Cuarto. The characteristic symptoms are the appearance of galls or "enations" in leaves, shortening of the stem internodes, poor radical system and general stunting. Changes in JA and protein pattern in maize control and infected plants of a virus-tolerant cultivar were investigated. Healthy and infected-leaf discs were collected for JA measurement at different post-infection times (20, 40, 60 and 68 days). JA was also measured in roots on day 60 after infection. For SDS-PAGE protein analysis, leaf discs were also harvested on day 60 after infection. Infected leaves showed higher levels of JA than healthy leaves, and the rise in endogenous JA coincided with the enation formation. The soluble protein amount did not show differences between infected and healthy leaves; moreover, no difference in the expression of soluble protein was revealed by SDS-PAGE. Our results show that the octadecanoid pathway was stimulated in leaves and roots of the tolerant maize cultivar when infected by this virus. This finding, together with fewer plants with the disease symptoms, suggest that higher foliar and roots JA content may be related to disease tolerance. SA exogenous treatment caused the reversion of the dwarfism symptom.
Bücher und Buchkapitel

Kramell, R.; Porzel, A.; Miersch, O.; Schneider, G.; Characterization of Isoleucine Conjugates of Cucurbic Acid Isomers by Reversed-Phase and Chiral High-Performance Liquid Chromatography 77-78, (1998)

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Bücher und Buchkapitel

Ziegler, J.; Hamberg, M.; Miersch, O.; Allene Oxide Cyclase from Corn: Partial Purification and Characterization 99-101, (1997) DOI: 10.1007/978-94-017-2662-7_32

In plants, the oxylipin pathway gives rise to several oxygenated fatty acid derivatives such as hydroxy- and keto fatty acids as well as volatile aldehydes and cyclic compounds, which are, in part, physiologically active [1]. Among these, jasmonic acid is discussed as signalling molecule during several stress responses, wounding, senescense and plant pathogen interactions [2].
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