Biosynthesis of very long-chain methyl-branched alcohols during pupal development in the cabbage looper, Trichoplusia ni

Renobales, Mertxe de; Nelson, Dennis R.; Zamboni, Anthony C.; Mackay, Marilyn E.; Dwyer, Lawrence A.; Theisen, M.; Blomquist, Gary J.

doi:10.1016/0020-1790(89)90093-0

Cited by 18 publications

(1 citation statement)

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“…In T. ni, during the fifth larval instar, FAS activity correlated with the synthesis of hydrocarbons and other lipid classes. However, throughout the pupal stage, negligible level of FAS activity was found in spite of the very high rate of hydrocarbon formation [23]. This suggested that the biosynthesis of long-chain methyl-branched hydrocarbons is by a different system than that of fatty acids in T. ni.…”

Section: Discussionmentioning

confidence: 98%

Identification, accumulation, and biosynthesis of the cuticular hydrocarbons of the southern armyworm, Spodoptera eridania (cramer) (lepidoptera: Noctuidae)

Guo¹,

Blomquist²

1991

Arch Insect Biochem Physiol

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The accumulation and biosynthesis of cuticular and internal hydrocarbons in the Southern armyworm, Spodoptera eridania, were examined at closely timed intervals during larval and pupal development. Gas chromatography-mass spectrometry (GC-MS) was used to identify n-alkanes, monomethylalkanes, and dimethylalkanes ranging in chain length from 23 to 35 carbons. The amount of cuticular hydrocarbon stayed relatively constant duringeach stadium, while the amount of internal hydrocarbon increased dramatically during the first half of each larval stadium, presumably to replace the cuticular hydrocarbon lost on the shed cast skin with each molt. The accumulation of internal hydrocarbon was mirrored by large increases in the rate of incorporation of labeled acetate into the hydrocarbon fraction. Hydrocarbon production fell to very low rates during the latter part of the fourth and fifth larval stadia. Relatively high rates of hydrocarbon production were observed during the first and last one-third of the pupal stage and essentially all of the hydrocarbons produced during this stage remained internal. These data document large changes in the rates of hydrocarbon production during development in S. eridania and suggest that most of the hydrocarbon produced during each stage was stored internally and then transported to the cuticle of the next stage.

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Section: Discussionmentioning

confidence: 98%