CHARACTERISTICS OF AN ABORTIVELY DISPORIC VARIANT OF
            <i>BACILLUS CEREUS</i>

Young, I. Elizabeth

doi:10.1128/jb.88.1.242-254.1964

Cited by 29 publications

(19 citation statements)

References 9 publications

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“…Many cells also form such septa at both cell ends. Such a double septation (with thick septa containing cell wall material) has been regularly observed in some sporulation mutants biochemically not identified (14,(16)(17)(18). It may represent the realization of a beginning septation that can occasionally be seen in normal sporulating cells on the cell end on which no spore develops (4,13).…”

Section: Discussionmentioning

confidence: 93%

Abnormal Septation and Inhibition of Sporulation by Accumulation of l -α-Glycerophosphate in Bacillus subtilis Mutants

Freese

1973

J Bacteriol

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Accumulation of L-a-glycerophosphate, in cells of Bacillus subtilis mutants lacking the nicotinamide adenine dinucleotide-independent glycerophosphate dehydrogenase activity, suppresses both growth and sporulation. After growth has stopped, the cells slowly develop one and later more asymmetric septa that are thicker than normal prespore septa and apparently contain too much cell wall material to allow further membrane development into forespores or spores. L-Malate prevents accumulation of glycerophosphate and restores sporulation of the mutant. Glucose or gluconate cannot restore sporulation, because they still effect glycerophosphate accumulation via de novo synthesis. If that accumulation is blocked in a double mutant, which is unable to make glycerophosphate from or to metabolize it into Embden-Meyerhof compounds, then nonsuppressing amounts of glucose or gluconate can restore sporulation. transformed into the phosphoglycerate kinase 1034 on August 4, 2020 by guest

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Section: Discussionmentioning

confidence: 93%

Abnormal Septation and Inhibition of Sporulation by Accumulation of l -α-Glycerophosphate in Bacillus subtilis Mutants

Freese

1973

J Bacteriol

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“…In the abnormal mutants, the morphogenetic process visibly goes astray, leading to cellular architectures found only exceptionally in a sporulating, wild-type population. Such are the strains presenting multiple disordered septations, which carve unequal, often nonnucleated cytoplasmic chunks out of the cell (155,167); or the strains of the so-called SPIIBtype, which make two normally located spore septa, one close to each pole, but are unable to proceed further with any of them (167,169,239). Not all these "monsters", depicted in Fig.…”

Section: Cytological Classification Of the Mutantsmentioning

confidence: 99%

“…Finally, in B. cereus var. alesti, crystalless mutants remain sp+ (239). If the crystal-forming protein is not synthesized in these strains, it is clearly not required for the sporulation of this organism.…”

Section: Cytological Classification Of the Mutantsmentioning

confidence: 99%

“…This is because a few per cent of the cells fail to sporulate, escape commitment, and continue to grow in the enriched medium. Also, up to stage II inclusively, the sporangium of a committed cell is still able to resume its multiplication (61,239). If enough glucose is added, however, these newly formed cells will not contribute to the yield of spores at t7.…”

mentioning

confidence: 99%

“…If enough glucose is added, however, these newly formed cells will not contribute to the yield of spores at t7. Incidently, resumption of growth from the nonsporal part of a sporangium shows that its nucleus, too, contains at least one complete genome (239).…”

mentioning

confidence: 99%

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