Prokaryotic plant parasites
Article Abstract:
Parasitism as applied to prokaryote - plant interactions occurs when a parasite lives with a host and exploits its resources at source level. The study of prokaryotes owes its current disciplinary drive to bacterial molecular genetics, and reveals genetic clues to widely used prokaryotic pathogenesis components and commonly used plant resistance mechanisms. Prokaryotic parasites differ from ordinary parasites in that the former shares the task of procuring food with the host. Some prokaryotic parasites even convert molecular nitrogen into ammonia in exchange for the carbohydrates they consume.
Publication Name: Cell
Subject: Biological sciences
ISSN: 0092-8674
Year: 1993
User Contributions:
Comment about this article or add new information about this topic:
Calcium spiking in plant root hairs responding to Rhizobium nodulation signals
Article Abstract:
Calcium (Ca) spiking in alfalfa root hair responding to Rhizobium lipochitooligosaccharide nodulation signal molecules are localized and periodic in nature. The application of the signal molecules in these root hair is followed by a lag period before spike formation. The signal molecules' structural features necessary for nodulation responses are also essential for Ca spike formation in alfalfa. Most of the Ca accumulates in the cytoplasm near the nucleus. Ca acts as a secondary messenger in the nodulation signal transduction.
Publication Name: Cell
Subject: Biological sciences
ISSN: 0092-8674
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
Rhizobium meliloti genes involved in sulfate activation: the two copies of nodPQ and a new locus, saa
Article Abstract:
A study was conducted to examine the mapping and cloning of nodulation genes in Rhizobium meliloti and its location on the pSym-b megaplasmid. Rhizobium meliloti, a nitrogen-fixing symbiont, fixes nodules on leguminous host plants. The process involves nodulation genes clustered on the symbiont's pSym-a megaplasmid. Mutation and deletion of these genes indicate another locus, sulfur amino acid, in R meliloti.
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1992
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Microsatellite variation in an introduced mouflon population. Chromosome evolution of the Blue Sheep/Bharal
- Abstracts: Allometric scaling of strength in an independently living population age 55-86 years. Abnormal allometric size of vital body organs among sudden infant death syndrome victims
- Abstracts: Hormonal changes during puberty and their relationship to fat distribution. Functions of corticotropin-releasing hormone in anthropoid primates: From brain to placenta
- Abstracts: Enzymatic recovery of elemental palladium by using sulfate-reducing bacteria. Presence of nitrate-accumulating sulfur bacteria and their influence on nitrogen cycling in a shallow coastal marine sediment
- Abstracts: Regulatory mechanisms for ras proteins. Molecular mechanisms involved in Ras inactivation: The annexin A6-p120GAP complex