A Nongenic Factor in the Longevity of Rotifers

Lansing, Albert I.

doi:10.1111/j.1749-6632.1954.tb36418.x

Cited by 97 publications

(55 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…But, Lints and co-workers are not alone in such a finding. Lansing (1947;1954), O'Brian (1961), Callahan (1962, and Flemmings and Ludwig (1964) have all recorded somewhat similar outcomes. In every case, reproduction at a late age in life caused a rapid decline in longevity, resulting in some instances in extinction.…”

Section: Discussionmentioning

confidence: 75%

A density threshold for the expression of longevity in Drosophila melanogaster

Luckinbill

Clare

1986

Heredity

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 75%

A density threshold for the expression of longevity in Drosophila melanogaster

Luckinbill

Clare

1986

Heredity

View full text Add to dashboard Cite

“…That influence, however, must not be neglected. One must remember the experiments of Lansing [1954] on a rotifer Philodina citrina, another poikilotherm. By reproducing that or ganism at different ages, that author could demonstrate that the age o f the mother (Philodina citrina is parthenogenetic) conditions the longevity of the offspring.…”

Section: Lintsmentioning

confidence: 99%

“…The determinism, and more precisely the genetic or non-genetic origin, of that possible parental influence on the longevity of adult Drosophila remains however obscure. Indeed, no one of those authors tried, as Lansing [1954] did and succeeded in a similar work on rotifers, to reverse the trend by choosing the age of the parents in an opposite direction.…”

mentioning

confidence: 99%

Life Span in <i>Drosophil</i><i>a</i>

Lints¹

1971

Gerontology

View full text Add to dashboard Cite

Recent experimental evidence does not coincide with the predictions of the different theories of ageing in Drosophila. A review of the evidence and more specifically of the experimental methods in use shows that in experiments one or more variables have in general not been taken into account. These variables are of different types; their influence on imaginal life span may be direct or indirect; direct through the action of con-temporaneous environmental factors, indirect through the action of parental or of antecedent environmental factors. An alternative theory of ageing is proposed; it essentially relates imaginal life span in Drosophila to the preimaginal rate of growth.

show abstract

“…For instance, Jennings and Lynch (1928) found that fecundity and length of life in the rotifer, Proal~ s~dida, were dependent on the age of the parents. Lansing (1954) showed that the mean life span of the rotifer, Philodiru~ dtrina, in an adolescent line slowly but significantly increased over 7 generations, while those of middle aged and senile lines declined and the rotifers died out over 5 and 3 generations, respectively. Furthermore, Takahashi (1954) was able to correlate the sex ratio in human beings with parental age.…”

Section: Discussionmentioning

confidence: 99%

Relationship Between the Activity of the Succinoxidase System and the Rate of Oxygen Consumption During the Embryonic Development of the Mealworm, Tenebrio Molitor Linnaeus

Ludwig

Barsa

1955

The Journal of General Physiology

View full text Add to dashboard Cite

For many years cytochrome oxidase has been considered a rate-limiting enzyme involved in oxygen consumption. This relationship was postulated by Wolsky (1938) to explain the U-shaped changes in oxygen consumption which occur during the pupal stage of Drosophila melanogaster. It has received support from the work of Boell (1945) for the embryonic development of the salamander, Amblystoma punctalum. He found a straight line relationship between the activity of cytochrome oxidase and the rate of oxygen consumption and observed that approximately 97 per cent of the respiration was abolished by treatment with cyanide. Sacktor (1951) observed that during the pupal stage of the house fly, Musca domestic.a, both the activity of cytochrome oxidase and the rate of oxygen consumption follow the characteristic U-shaped curve. A similar relationship was shown to exist in the pupa of the Japanese beetle, Popilliajaponica, by Ludwig (1953). However, Wolsky (1941) suggested that the U-shaped respiratory curve in Drosophila pupae may be connected with variations in the activities of the dehydrogenase systems. Agrell (1949) found that in the bow fly, Calliphora erythrocephala, malic, citric, and glutamic dehydrogenases all follow a U-shaped activity curve. Sacktor (1951) found that, in the pupa of the house fly, other factors in addition to the cytochrome system may contribute to the total respiration. A part of the pupal respiration is cyanide-insensitive, and there is in addition to cytochrome oxidase, another cyanide-sensitive system, probably involving tyrosinase.The metabolism of the insect egg may be complicated by the presence of a diapause or resting stage. Bodine (1934) showed that the respiration of the pre-and postdiapause egg of the grasshopper, Melanoplus differentialis, is markedly inhibited by cyanide, whereas that of the diapause egg is cyanideinsensitive. Hence, respiration of the diapanse egg is believed to be mediated by some mechanism other than the cytochrome system, while a portion of the *

show abstract

A Nongenic Factor in the Longevity of Rotifers

Cited by 97 publications

References 4 publications

A density threshold for the expression of longevity in Drosophila melanogaster

A density threshold for the expression of longevity in Drosophila melanogaster

Life Span in <i>Drosophil</i><i>a</i>

Relationship Between the Activity of the Succinoxidase System and the Rate of Oxygen Consumption During the Embryonic Development of the Mealworm, Tenebrio Molitor Linnaeus

Contact Info

Product

Resources

About