Molecular and physiological characterization of rhizosphere bacteria and Frankia in forest soils devoid of actinorhizal plants
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منابع مشابه
Use of Frankia and Actinorhizal Plants for Degraded Lands Reclamation
Degraded lands are defined by soils that have lost primary productivity due to abiotic or biotic stresses. Among the abiotic stresses, drought, salinity, and heavy metals are the main threats in tropical areas. These stresses affect plant growth and reduce their productivity. Nitrogen-fixing plants such as actinorhizal species that are able to grow in poor and disturbed soils are widely planted...
متن کاملHost Plant Compatibility Shapes the Proteogenome of Frankia coriariae
Molecular signaling networks in the actinorhizal rhizosphere select host-compatible Frankia strains, trigger the infection process and eventually the genesis of nitrogen-fixing nodules. The molecular triggers involved remain difficult to ascertain. Root exudates (RE) are highly dynamic substrates that play key roles in establishing the rhizosphere microbiome. RE are known to induce the secretio...
متن کاملSymbiosis between Frankia and actinorhizal plants: root nodules of non-legumes.
In actinorhizal symbioses, filamentous nitrogen-fixing soil bacteria of the genus Frankia induce the formation of nodules on the roots of a diverse group of dicotyledonous plants representing trees or woody shrubs, with one exception, Datisca glomerata. In the nodules, Frankia fixes nitrogen and exports the products to the plant cytoplasm, while being supplied with carbon sources by the host. P...
متن کاملNew insights in the molecular events underlying actinorhizal nodulation in the tropical tree Casuarina glauca
Background Actinorhizal root nodules result from the interaction between a nitrogen-fixing actinomycete called Frankia and roots of dicotyledonous trees and shrubs belonging to 8 plant families and 25 genera. Most actinorhizal plants are capable of high rates of nitrogen fixation comparable to those found in legumes. As a consequence, these trees are able to grow in poor and disturbed soils and...
متن کاملInfection-related activation of the cg12 promoter is conserved between actinorhizal and legume-rhizobia root nodule symbiosis.
Two nitrogen-fixing root nodule symbioses between soil bacteria and higher plants have been described: the symbiosis between legume and rhizobia and actinorhizal symbioses between plants belonging to eight angiosperm families and the actinomycete Frankia. We have recently shown that the subtilisin-like Ser protease gene cg12 (isolated from the actinorhizal plant Casuarina glauca) is specificall...
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تاریخ انتشار 2001