caa a22 4500 469081821 CHVBK 20180323132952.0 cr unu---uuuuu 170328e19920401xx s 000 0 eng 10.1007/BF00338060 doi (NATIONALLICENCE)springer-10.1007/BF00338060 Ageing adipokinetic cells in Locusta migratoria [Elektronische Daten] an ultrastructural morphometric study [J. Diederen, M. Peppelenbosch, H. Vullings] Summary: A morphometric study was made of the ultrastructure of adipokinetic cells in resting adults of Locusta migratoria at 3, 23, and 43 days after imaginal ecdysis. The nucleus, rough endoplasmic reticulum, and Golgi apparatus enlarge with age, which indicates that the synthesis and packaging of secretory substances increases during ageing. The size of the storage compartment, consisting of secretory and ergastoplasmic granules, does not increase earlier than 23-43 days after imaginal ecdysis. The lysosomal compartment markedly enlarges between 3 and 23 days; later on, the growth of this compartment, especially of autophagosomes, is less prominent. This suggests that lysosomal destruction initially compensates for the production of new secretory granules, assuming that exocytosis of secretory granules by adipokinetic cells is insignificant in resting locusts. Afterwards, lysosomal destruction may no longer be sufficient to prevent over-production of secretory granules, as is suggested by the increase in the number of these granules between 23 and 43 days. This coincides with the appearance of a considerable number of large ergastoplasmic granules, which represent a spatially more efficient form of storage of secretory material than the much smaller secretory granules. The increase with age in the amount of secretory products indicates that the biosynthetic activity of the adipokinetic cells is not (finely) tuned to their releasing activity. Springer-Verlag, 1992 Corpus cardiacum nationallicence Adipokinetic cells nationallicence Ageing nationallicence Secretory process nationallicence Secretory granules nationallicence Lysosomes nationallicence Autophagy nationallicence Locusta migratoria (Insecta) nationallicence Diederen J. Department of Experimental Zoology, University of Utrecht, Padualaan 8, NL-3584 CH, Utrecht, The Netherlands aut Peppelenbosch M. Department of Experimental Zoology, University of Utrecht, Padualaan 8, NL-3584 CH, Utrecht, The Netherlands aut Vullings H. Department of Experimental Zoology, University of Utrecht, Padualaan 8, NL-3584 CH, Utrecht, The Netherlands aut Cell and Tissue Research Springer-Verlag 268/1(1992-04-01), 117-121 0302-766X 268:1<117 1992 268 441 https://doi.org/10.1007/BF00338060 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00338060 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Diederen J. Department of Experimental Zoology, University of Utrecht, Padualaan 8, NL-3584 CH, Utrecht, The Netherlands aut NATIONALLICENCE 700 1- Peppelenbosch M. Department of Experimental Zoology, University of Utrecht, Padualaan 8, NL-3584 CH, Utrecht, The Netherlands aut NATIONALLICENCE 700 1- Vullings H. Department of Experimental Zoology, University of Utrecht, Padualaan 8, NL-3584 CH, Utrecht, The Netherlands aut NATIONALLICENCE 773 0- Cell and Tissue Research Springer-Verlag 268/1(1992-04-01), 117-121 0302-766X 268:1<117 1992 268 441 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer