Frankia: New Light on an Actinomycete Symbiont

Baker, Dwight

doi:10.1016/b978-0-12-528620-6.50046-x

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…2) or in fractured nodule ceiis photographed with scanning electron microscopy (Fig. 3;Baker and Seling 1984). Sporangia and spores are most clearly visualized at the uitrastructural level with the transmission electron microscope ( Fig.…”

Section: Sporangium Formation In Culture Aud Within Root Nodulesmentioning

confidence: 97%

Endophyte sporulation in root nodules of actinorhizal plants

Torrey

1987

Physiologia Plantarum

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All strains of isolated Frankia possess the genetic capacity to form sporangia since, when grown in vitro, they usually sporulate freely, depending on the physical and chemical environment in which they are cultured. Endophytic sporulation involving Frankia differentiation of sporangia within root nodules has been described in only 16 host species in 9 genera within six families of actinorhizal plants. From studies published to date, endophytic sporulation cannot be correlated with specific environmental conditions surrounding the host plants. Based on the literature and on previously unpublished observations from field and greenhouse studies, an account is given of the occurrence of sporulation in actinorhizal plants with emphasis on Alnus, Casuarina, Comptonia, Elaeagnus and Myrica. The possible role of the host plant in controlling Frankia sporulation as contrasted to the control exerted by the genetic constitution of the microbial symbiont is explored.

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Section: Sporangium Formation In Culture Aud Within Root Nodulesmentioning

confidence: 97%

Endophyte sporulation in root nodules of actinorhizal plants

Torrey

1987

Physiologia Plantarum

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“…first plants to colonize ecologically disturbed or nitrogen-poor sites (Baker & Selig, 1984 ;Tjepkema et al, 1986). The annual nitrogen fixation rates for actinorhizal plants range from 2 to 362 kg nitrogen per hectare (Stowers, 1987) and they contribute significant amounts of reduced nitrogen to the ecosystems which they occupy.…”

Section: Abbreviation : Tsp Transcription Start Pointmentioning

confidence: 99%

“…They are capable of fixing atmospheric dinitrogen either in the free-living state or in symbiosis with host plants representing over 194 species distributed among 24 genera (Nazaret et al, 1991). Actinorhizal host plants are trees and woody shrubs that are distributed worldwide, but are predominantly found in temperate areas (Baker & Selig, 1984) and at higher elevations of the tropics (Tjepkema et al, 1986). They are generally pioneer species, meaning that they are the …”

Section: Introductionmentioning

confidence: 99%