Chronological Sequence, Synchronization and Induction of the Development of Fruit Bodies in Cladonia furcata var. furcata (Huds.) Schrad.

Jahns, H. M.; Herold, K.; Beltman, H. A.

doi:10.1127/nova.hedwigia/30/1979/469

Cited by 21 publications

(18 citation statements)

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“…In addition the insertion of the primordia onto short lateral branchlets and the complex thallus morphology, mainly the system of lateral slits in the main axis and lateral branchlets, seem to play a role in conidium dispersal. As stated by Jahns et al (1978), pycnidia may be found throughout the year, but it seems that the conidiogenous cells are active only for a rather short period and then pass into a state of senescence and degradation (Honegger 1984). A great number of pycnidia investigated in the present study on Cladonia furcata were ' weeping', i.e.…”

Section: Discussionsupporting

confidence: 46%

“…Three different periods within developmental stage 4 of Jahns et al (1978) were seen in the SEM preparations of ascomatal primordia of Cladonia furcata (Fig. 2).…”

Section: Resultsmentioning

confidence: 99%

“…Six developmental stages of ascoma formation were distinguished (Jahns et al 1978), starting with pale branch tips (stage 1), through enlarged, pigmented branch tips (stage 3) to mature fruit bodies (stage 6). The SEM micrographs presented here are concerned with stage 4 of Jahns et al (1978) in which ascomatal primordia are visible under a dissecting microscope as swollen, pigmented structures with a fine, pruina-like surface layer formed by protruding terminal cells of the trichogynes. Jahns (1970Jahns ( , 1973 pointed out that the delicate trichogynes are short-lived structures which only develop, as demonstrated in Cladonia furcata var.…”

Section: Introductionmentioning

confidence: 99%

“…Jahns (1970Jahns ( , 1973 pointed out that the delicate trichogynes are short-lived structures which only develop, as demonstrated in Cladonia furcata var. furcata (Jahns et al, 1978), under particular climatic conditions during a short period of the year.…”

Section: Introductionmentioning

confidence: 99%

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Scanning Electron Microscopy of the Contact Site of Conidia and Trichogynes in Cladonia Furcata

Honegger

1984

The Lichenologist

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Abstract:The contact sites of pycnidia and the terminal cells of trichogynes in Cladonia furcata were investigated using either freshly fixed material, or ascomatal primordia and pycnidia from which the gelatinous material either on the primordial surface, or in the pycnidial cavity, had been removed. The sickle-shaped conidia fused, tip first, with the cell wall of trichogynes. Circular holes of about the diameter of the conidia found in the cell walls of trichogynes arise from enzymatic degradation of the wall material by fusing conidia. As the conidia appear to stick on any gelatinous surface material of the thallus the adhesion process is presumed to be unspecific.

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Section: Discussionsupporting

confidence: 46%

“…Three different periods within developmental stage 4 of Jahns et al (1978) were seen in the SEM preparations of ascomatal primordia of Cladonia furcata (Fig. 2).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Scanning Electron Microscopy of the Contact Site of Conidia and Trichogynes in Cladonia Furcata

Honegger

1984

The Lichenologist

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“…7 3 (Suppl. I), 1995 primordia of ascocarps are generally short lived (Jahns et al 1978) and only are formed under very favourable external conditions, a continuous and sufficient supply of spermatia is necessary to ensure fertilization. As conidia probably serve as spermatia in lichens (Honegger 1984) the early differentiation of pycnidia is an indispensable requirement for sexual reproduction.…”

Section: Discussionmentioning

confidence: 99%

Development, regeneration, and parasitic interactions between the lichens Fulgensia bracteata and Toninia caeruleonigricans

Ott¹,

Meier²,

Jahns³

1995

Can. J. Bot.

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A possible source of Trebouia algae for lichens are the thalli of lichens that are attacked by another mycobiont that captures the algae for its own symbiotic use. Such a process is described for Fulgensia bracteata living in parasitic association with Toninia caeruleonigricans. The development of the thalli of Toninia and the parasitic attack of Fulgensia are analysed in detail. The infection of Toninia is achieved by ascosporcs and can be demonstrated by the presence of secondary lichen substances typical for Fulgensia, which occur in infected thalli of Toninia. Fulgensia also overgrows other lichens, but these thalli are not invaded. The special abilities of Toninia and various methods for distribution and regeneration compensate for the parasitism and the association remains stable. The ecology of the small developmental stages of Toninia and Fulgensia shows important differences.R6um6 : Chez les lichens, une source possible d'algue Trebouia pour la formation du lichen reside dans les thalles de lichens qui sont attaquCs par un autre mycobionte, lequel s'approprie des algues de I'h8te pour ses propres fins symbiotiques. Les auteurs decrivent ce procCdC chcz le Fulgensia bracteata vivant en parasite avec le Tonnia caeruleonigricans. 11s analysent en d6tails le d6veloppement du thalle du Toninia et l'attaque parasitaire du Fulgensia. L'infection du Toninia est rkaliste par des ascospores et peut &re dCmontrCe par la presence de mktabolites lichkniques secondaires typiques du Fulgensia, lesquels se retrouvent dans les thalles infect& du Toninia. Le Fulgensia peut Cgalement attaquer d'autres lichens mais sans en envahir les thalles. Les capacitCs speciales du Toninia ainsi que diffkrentes mtthodes de distribution et de reginbration compensent pour le parasitisme et l'association demeure stable. L'Ccologie des premiers stades de dtveloppement du Toninia et du Fulgensia montrent des diffirences importantes.

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The Effect of Agrochemicals on the Growth of Cladonia Furcata

1994

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Chronological Sequence, Synchronization and Induction of the Development of Fruit Bodies in Cladonia furcata var. furcata (Huds.) Schrad.

Cited by 21 publications

References 0 publications

Scanning Electron Microscopy of the Contact Site of Conidia and Trichogynes in Cladonia Furcata

Scanning Electron Microscopy of the Contact Site of Conidia and Trichogynes in Cladonia Furcata

Development, regeneration, and parasitic interactions between the lichens Fulgensia bracteata and Toninia caeruleonigricans

The Effect of Agrochemicals on the Growth of Cladonia Furcata

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