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The unicellular flagellate Euglena gracilis shows positive phototaxis at low-light intensities (<10 W/m2) and a negative one at higher irradiances (>10 W/m2). Phototaxis is based on blue light-activated adenylyl cyclases, which produce cAMP upon irradiation. In the absence of light the cells swim upward in the water column (negative gravitaxis). The results of sounding rocket campaigns and of...
The Rpv3 locus determines the ability to operate an isolate-specific hypersensitive response (HR) against Plasmopara viticola in grapevines that carry a resistant Rpv3+ haplotype. Artificial infection was performed on leaf discs of Rpv3+ and Rpv3− grapevines with two distinct isolates of the pathogen (avrRpv3+ and avrRpv3−). The plant response, including the establishment of HR and changes in...
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