Beiträge zur Anatomie und Biologie der Wurzelknöllchen von Alnus glutinosa Gaertn.

Pommer, E. H.

doi:10.1016/s0367-1615(17)33137-3

Cited by 15 publications

(18 citation statements)

References 16 publications

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“…Root hair infection was clearly demonstrated (for Aln~is gllrtinosa) by Angulo Carmona (1974) (cf. also Angulo et al 1976) and had been reported earlier by Pommer (1956) and Becking (1968). In this study, root hair infection was proved for Comptonia and, in studies to be reported separately, has been shown conclusively also for Casuarina and Myrica.…”

Section: Discussionsupporting

confidence: 55%

“…Studies of the mode of infection and the process of initiation of the primary root nodule in actinomycetous nodules have been reported for Alnusglutinosa (Pommer 1956;Taubert 1956;Angulo Carmona 1974), Myrica gale (Fletcher 1955), and Casuarina cunninghamiana (McLuckie 1923;Torrey 1976). In Alnus, the infection was shown to occur via root hairs which became deformed after the application of the crushed nodule inoculum and then were invaded (Angulo Carmona 1974).…”

mentioning

confidence: 99%

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Prenodule formation and primary nodule development in roots of Comptonia (Myricaceae)

Callaham¹,

Torrey²

1977

Can. J. Bot.

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CALLAHAM, D., and J. G. TORREY. 1977. Prenodule formation and primary noduledevelopment in roots of Cot71ptot1in (Myricaceae). Can. J . Bot. 55: 2306-23 18. Seedlings of the sweet fern, Comptot~icr peregri71o (L.) Coult., grown aeroponically, were inoculated with a nodule suspension to allow infection by the actinomycete-like organism which causes nodule formation. Roots with early stages of infection and nodule initiation were fixed, embedded in resin, sectioned, and examined. Infection is infrequent in Comptot~icr with only a few n o d~~l e s per seedling root system. Infection via root hair invasion causes the retention of the curled and deformed root hair in an intensely cytoplasmic state with ~xmification of multiple filamento~ls strands of the endophyte. A limited cortical proliferation occurs in response to the infection forming the prenodule; endophyte filaments grow radially inward from the base of the infected epidermal root hair and invade a portion of the prenodular cells resulting in their hypertrophy. Distal and proximal to the prenodule site, a number of primary nodule primordia are initiated, varying from a few LIP to a dozen or more. These primordia appear to develop more o r less simultaneously under the s t i m u l~~s of the invading endophyte; they are like lateral roots in their site of origin. occurring largely opposite the protoxylem poles and involving pericyclic and endodermal cell proliferation, They differ in that the cortical cells external to each primordium are stimulated to undergo divisions and these cortical cell derivatives are incorporated into the developing primordium. The endophyte enters the cortical tissues of the lateral root on which the prenodule has formed and then invades proximal and distal to the infection site, progressing into the cortical tissues of each of the developing nodule primordia. A cork-like layer develops on the original lateral root in areas not occupied by primordia by initiation of subepidermal cell divisions and wall thickening. Normal lateral root primordium formation occurs in the pericycle opposite the protoxylem poles and involves cellular derivatives of the pericycle and endodermis but no cortical cells, which instead are crushed and displaced by the lateral root primordium as it develops. Nodule formation clearly involves complex chemical interactions, which remain for further study, between the host cells and the invading endophyte. C A L L A H A M , D., et J. G. TORREY. 1977. Prenodule formation and primary nodule development in roots of Co~nptot~icr (Myricaceae). Can. J. Bot. 55: 2306-23 18. Des plantules du Comprot~ia peregrina (L.) Coult. cultivtes en akroponique ont CtC inocultes avec une suspension nodulaire pour permettre I'infection par I'organisme (actinomycete?) qui cause la formation du nodule. Les racines porteuses des premiers stades d e I'infection e t des nodules au debut de leur formation ont CtC fixCes, enrobCes dans la resine, sectionnkes e t examinees. L'infection n'est pas abondante chez le Comptonia, seul quelques nodules...

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Section: Discussionsupporting

confidence: 55%

mentioning

confidence: 99%

Prenodule formation and primary nodule development in roots of Comptonia (Myricaceae)

Callaham¹,

Torrey²

1977

Can. J. Bot.

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“…A notable exception is represented by the particular interaction occurring on alder roots, consisting in the induction of the formation of myconodules confined at the outer cortical layer. A fungus inducing myconodules on Alnus incana was first identified as P. albidum [66]. Afterwards, isolates recovered from roots of Alnus glutinosa were ascribed to the closely related P. nigricans [67], currently treated as a synonym of P. janczewskii.…”

Section: Endophytism Of Penicillium Species In Woody Plantsmentioning

confidence: 99%

Endophytism of Penicillium Species in Woody Plants

Nicoletti¹,

Fiorentino²,

Scognamiglio³

2014

TOMYCJ

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Abstract:The genus Penicillium is ubiquitous and its species are commonly recovered from every kind of substrate and environmental conditions. Therefore, not surprisingly, Penicillium strains are commonly reported in investigations dealing with fungal endophytic assemblages of plants in both natural and anthropic contexts. As such they are implicated in more or less effective relationships with the host, and involved in applicative issues concerning plant protection and the production of bioactive compounds to be exploited as pharmaceuticals. The available data on occurrence, biocenotic role, production and bioactivities of secondary metabolites of Penicillium strains which have been isolated as endophytes from woody plants are reviewed in the present paper in the aim to introduce the state of the art to researchers involved in this particular field.

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“…Aus diesem Grunde werden audi die Versudisergebnisse von AFANASII-V (1937) und NOLL (1939, die trotz Verwendung nur auf histologisch-zytologischen Untersudiungen begriindete Ansidit iiber die Natur des Symbionten von Alnus glutinosa nidit bestatigt werden konnte. Zu dem gleichen Ergebnis konimen POMMER (1956), TAUBERT (1956) und QuisPEL (1954.…”

Section: Til Diskussion Der Versuchsergebnisseunclassified

Untersuchungen zur Ätiologie pflanzlicher Actinomykosen

Hoffmann¹

1959

Journal of Phytopathology

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Beiträge zur Anatomie und Biologie der Wurzelknöllchen von Alnus glutinosa Gaertn.

Cited by 15 publications

References 16 publications

Prenodule formation and primary nodule development in roots of Comptonia (Myricaceae)

Prenodule formation and primary nodule development in roots of Comptonia (Myricaceae)

Endophytism of Penicillium Species in Woody Plants

Untersuchungen zur Ätiologie pflanzlicher Actinomykosen

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