. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 514 MAOKUNITAKEDA TABLE I Bioassay of the active fractions on the diapausing prepupae of Monema flavescens seven days after onset of treatment. Prothoracic glands Active fractions Post-diapaus- ing prepupae (unaffected) Prepupal- pupal inter- mediates Pupae ob- tained Post-diapausing stage 41 (/3-ecdysone) 51 (a-ecdysone) 0 0 7 13 8 2 Diapausing stage 41 (/3-ecdysone) 51 (a-ecdysone) 6 6 0 0 0 0 Controls ethanol 10 0 0 of cholesterol is elaborated to a-ecdysone just before secretion. As a-ecdysone is known to convert into /?
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 514 MAOKUNITAKEDA TABLE I Bioassay of the active fractions on the diapausing prepupae of Monema flavescens seven days after onset of treatment. Prothoracic glands Active fractions Post-diapaus- ing prepupae (unaffected) Prepupal- pupal inter- mediates Pupae ob- tained Post-diapausing stage 41 (/3-ecdysone) 51 (a-ecdysone) 0 0 7 13 8 2 Diapausing stage 41 (/3-ecdysone) 51 (a-ecdysone) 6 6 0 0 0 0 Controls ethanol 10 0 0 of cholesterol is elaborated to a-ecdysone just before secretion. As a-ecdysone is known to convert into /?-ecdysone, yS-ecdysone found in the medium seems to originate from a-ecdysone. In the crab, Hemigrapsus nudus, however, "labelled /?- oo O Q_ 0. 30 Fraction Number FIGURE 22. Ecdysone biosynthesis in the ligatured post diapausing prepupae. Open circles indicate prior part with prothoracic glands; closed circles, posterior part without pro- thoracic glands. Fractions 41 and 51 correspond to )3- and a-ecdysones, respectively. Even in the posterior part without prothoracic glands, a- and /3-ecdysones were biosynthesized in Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
Size: 1840px × 1357px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
