Effect of Some Physical and Chemical Factors on the Germination of Akinetes of Anabaena Cylindrica

Yamamoto, Yoko

doi:10.2323/jgam.22.311

Cited by 66 publications

(79 citation statements)

References 7 publications

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“…These two types of functionally specialized cells have thick envelopes consisting of the same unique polysaccharide (Cardemil & Wolk, 1976). Heterocysts are the site of N, fixation under aerobic conditions (Haselkorn, 1978), while spores are perennating bodies which can resume growth under favourable conditions (Rother & Fay, 1977;Yamamoto, 1975Yamamoto, , 1976. Although heterocyst differentiation has been investigated in many species, there have been few studies of the relationships between these alternative pathways of differentiation (Nichols & Carr, 1978;Sutherland et al, 1979).…”

Section: Introductionmentioning

confidence: 99%

Induction and Differentiation of Heterocysts in the Filamentous Cyanobacterium Cylindrospermum licheniforme

Water

Simon

1982

Microbiology

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The fragmentation of Cylindrospermum licheniforme filaments resulted in the induction of a synchronous round of heterocyst differentiation. Young heterocysts (proheterocysts) appeared 12 to 15 h after fragmentation, and 12 to 15% of the cells became heterocysts within 24 h. NH,Cl or NaNO, prevented the formation of new heterocysts, while differentiation was stimulated twofold by the absence of atmospheric N,. The sequence of appearance of heterocyst-specific characteristics was observed following filament fragmentation. Nitrogenase activity increased rapidly between 13 and 26 h, paralleling the increase in heterocyst frequency. Glycolipids unique to the heterocyst envelope were also synthesized between 13 and 26 h, and activities of 6-phosphogluconate dehydrogenase and glucose-6-phosphate dehydrogenase increased after 10 h and 90 h respectively. Aged medium induced sporulation in intact filaments within 1 d, but sporulation could occur no earlier than 2 d after filament fragmentation, indicating that the induction of sporulation requires the presence of mature (but not necessarily functional) heterocysts.

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Section: Introductionmentioning

confidence: 99%

Induction and Differentiation of Heterocysts in the Filamentous Cyanobacterium Cylindrospermum licheniforme

Water

Simon

1982

Microbiology

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“…Thus, while decreases in Nostoc akinete respiration were comparable to those reported here int rochoidea cysts , respiration rate in the akinetes of another cyanophyte, Anabaena cylindrica, were actually greater than those in vegetative cells (Fay 1969a, Yamamoto 1976.…”

Section: ------------------------------------------------------------mentioning

confidence: 64%

“…1982, but increased or comparable respiration has been reported in akinetes of other cyanophytes (Fay 1969a, Yamamoto 1976) and in those of ch1orophytes (O'Neal and Lembi 1983). Likewise, although reduced photosynthetic capacity is found in cyanophyte and ch1orophyte akinetes (Fay 1969a, Yamamoto 1976, Chauvat et a1. 1982, O'Neal and Lembi 1983, photosynthetic activity comparable to that in vegetative stages has been recorded in many diatom resting spores Hargraves 1980, Hollibaugh et a1.…”

Section: The Conditions Necessary For Germination In Dinoflagellate Cmentioning

confidence: 78%

“…Examples of reduced resting stage respiration (relative to the vegetative state) are found among cyanophytes and diatom resting spores , French and Hargraves 1980, Chauvat et a1. 1982, but increased or comparable respiration has been reported in akinetes of other cyanophytes (Fay 1969a, Yamamoto 1976) and in those of ch1orophytes (O'Neal and Lembi 1983). Likewise, although reduced photosynthetic capacity is found in cyanophyte and ch1orophyte akinetes (Fay 1969a, Yamamoto 1976, Chauvat et a1.…”

Section: The Conditions Necessary For Germination In Dinoflagellate Cmentioning

confidence: 99%

“…Among the algae generally, germination of cyanobacterial akinetes and diatom resting spores has been widely found to be light-dependent (Yamamoto 1976, Hollibaugh et a1. 1981, Chauvat et a1.…”

Section: ) Without Tris Was Employed Solutions Of Percollmentioning

confidence: 99%

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The physiology of dormancy and germination in cysts of the marine dinoflagellate Scrippsiella trochoidea

Binder¹

1986

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Identification of cyanobacteria overwintering cells and environmental conditions causing growth: Application for preventative management

Calomeni‐Eck,

McQueen,

Kinley‐Baird

et al. 2024

Ecol Sol and Evidence

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Harmful algal blooms (HABs) formed by freshwater cyanobacteria pose risks to human and ecological health globally. Some cyanobacteria form overwintering cells that remain in the sediment during non‐ideal growth conditions and provide an inoculum for HABs during the growing season, perpetuating the cyanobacterial life cycle. Preventative management targeted at decreasing the viability of overwintering cells is an attractive strategy for limiting HAB formation and decreasing risks. However, this approach is novel, and information is needed for sampling, identification and enumeration of overwintering cells in sediments as well as methods for determining if overwintering cells have the potential to contribute to HAB formation. Peer reviewed literature related to these topics are available; yet these data need to be synthesized and placed into the context of management. Therefore, a strategic review was conducted to inform methods and data needs for this preventative strategy. To sample overwintering cells, corers or dredges are used to collect surficial (0–2 cm) sediment layers containing overwintering cells. Identification and enumeration of overwintering cells via light microscopy are aided by dilution, sieving, or density separation of cells from sediment. Incubation studies which simulate environmental conditions triggering akinete germination and cell growth provide evidence of overwintering cell viability. Critical environmental conditions are light (≥0.5 μmol m−2 s−1) and temperature (20–30°C) for triggering akinete germination and growth of quiescent vegetative Microcystis sp. cells, respectively. Limited information was available on the roles of mixing and dissolved oxygen as environmental conditions for germination and growth. Synthesized information can be used to identify potential areas of concern in which overwintering cells are contributing to HABs. Additionally, this information can be used to design incubation studies in which field collected sediments containing overwintering cells are placed in ideal environmental conditions for germination and growth and cyanobacteria transferring to the water column are measured over time. These data inform investigations of areas that are candidates for preventative management and measurements of overwintering cell responses to management.

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Effect of Some Physical and Chemical Factors on the Germination of Akinetes of Anabaena Cylindrica

Cited by 66 publications

References 7 publications

Induction and Differentiation of Heterocysts in the Filamentous Cyanobacterium Cylindrospermum licheniforme

Induction and Differentiation of Heterocysts in the Filamentous Cyanobacterium Cylindrospermum licheniforme

The physiology of dormancy and germination in cysts of the marine dinoflagellate Scrippsiella trochoidea

Identification of cyanobacteria overwintering cells and environmental conditions causing growth: Application for preventative management

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