A Study of Meiosis and the Effects of Certain Antibiotics Upon Meiosis in Gymnosporangium

Berliner, Martha D.

doi:10.1002/j.1537-2197.1954.tb14309.x

American J of Botany

1954

DOI: 10.1002/j.1537-2197.1954.tb14309.x

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A Study of Meiosis and the Effects of Certain Antibiotics Upon Meiosis in Gymnosporangium

Martha D. Berliner

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1960

1973

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Cited by 12 publications

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“…Berkson and Britton (1969) observed what appeared to be a two-fibered spindle in the epibasidium of P. lobata. Berliner (1954) reported this condition in G. clavipes. Clearly, the chromosomes of C. dicentrae travel along more than two paths to the poles of the spindle (Fig.…”

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confidence: 93%

Cytological Studies of the Telial Stage of Cerotelium Dicentrae

Berkson

1970

American J of Botany

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The cytology of telial germination and basidial meiosis is followed. A filament extends from the chromosomes to the nuclear membrane during zygotene, and various types of metaphase figures, nucleolus‐organizing chromosomes, and distinct centrioles occur. Clamp connections are not associated with the dikaryotic mycelium of this fungus, and it is suggested that the centriole is involved in nuclear motility.

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Cytological Studies of the Telial Stage of Cerotelium Dicentrae

Berkson

1970

American J of Botany

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Morphology and cytology of Ravenelia emblicae Sydow

Singh

1973

J of Basic Microbiology

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The morphology of spore-forms in Ravenelia emblicae SYDOW is described in detail. Only pycnial, uredial, and telial stages occur in its life cycle. Observations on nuclear behaviour in teliospore, basidium, and basidiospore are presented here. The haploid chromosome complement a t the metaphase of meiotic nuclear division indicated 5 morphologically distinct chromosomes ( n = 5 ) .The rust species Ravenelia emblicae S YDOW parasitizes the leaflets of Phyllanthus emblica L. in the vicinity of Varanasi. It is also reported to occur in few other places such as Dehradun (U. P.), Nagpur (Maharashtra), and Tanjore (Madras) (BUTLER and BISBY 1960). The species was originally described by H. and P. SYDOW and BUTLER (1906) who reported the occcurrence of uredia and telia only. A recollection of the pathogen on this host indicated the presence of pycnia also (PAVGI and SINGH 1969), while no aecial stage was observed. Observations on morphology of spore-forms and nuclear behaviour in teliospore, basidium, and basidiospore are presented here. Material and methodsPinnules bearing the rust infection in different stages were collected and preserved in FAA (50% ethyl alcohol 90 ml; glacial acetic acid 5 ml; formalin 5 ml). A portion of the material was processed further for microton. b y the paraffin embedding method. Microtomed sections (10-12 p thick) were cut for morphological study. Teliospores from stored material were germinated by the method described by THIRUMALACHAR et al. (1950, 1953) and further stained with acetocarmine for nuclear behaviour (SINQH and PAVGI 1966). Results and discussionThe fungus incites the rust disease on leaflets of the susceptible host plant.No infection on other parts is observed. The infection becomes visible only after the uredial development at which stage it initiates premature defoliation becoming Severe with telial development. This reduced host vigor and fruit development.

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Morphology and cytology ofRavenelia emblicae Sydow

Singh

1973

Z Allg Mikrobiol

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A Study of Meiosis and the Effects of Certain Antibiotics Upon Meiosis in Gymnosporangium

Cited by 12 publications

References 18 publications

Cytological Studies of the Telial Stage of Cerotelium Dicentrae

Cytological Studies of the Telial Stage of Cerotelium Dicentrae

Morphology and cytology of Ravenelia emblicae Sydow

Morphology and cytology ofRavenelia emblicae Sydow

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