caa a22 4500 469061073 CHVBK 20180323132857.0 cr unu---uuuuu 170328e19920701xx s 000 0 eng 10.1007/BF01193967 doi (NATIONALLICENCE)springer-10.1007/BF01193967 Observations on the proventricular glands (‘organes racémiformes') of the oribatid mite Chamobates borealis (Acari, Oribatida): an organ of interest for studies on adaptation of animals to acid soils [Elektronische Daten] [Mario Ludwig, Markus Kratzmann, Gerd Alberti] The proventricular glands of the oribatid miteChamobates borealis (Trägårdh, 1902) were investigated by electron microscopy and histochemistry, and their function was tested in a laboratory experiment. Specimens of the same species collected during a field study also were investigated. The cells of the proventricular glands are characterized by great amounts of mineral spherites and seem to be sensitive to alterations of environmental pH and concentration of CaCO3. It was demonstrated that a reduction of pH leads to a decrease of the spherites, whereas at a high pH the number of spherites increases. The proventricular glands with their spherites seem to play an important role in regulation of mineral budget, pH and detoxification of heavy metals. Elsevier Science Publishers B.V., 1992 Ludwig Mario Zoological Institute I, University of Heidelberg, Im Neuenheimer Feld 230, 6900, Heidelberg, Germany aut Kratzmann Markus Zoological Institute I, University of Heidelberg, Im Neuenheimer Feld 230, 6900, Heidelberg, Germany aut Alberti Gerd Zoological Institute I, University of Heidelberg, Im Neuenheimer Feld 230, 6900, Heidelberg, Germany aut Experimental & Applied Acarology Kluwer Academic Publishers 15/1(1992-07-01), 49-57 0168-8162 15:1<49 1992 15 10493 https://doi.org/10.1007/BF01193967 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01193967 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ludwig Mario Zoological Institute I, University of Heidelberg, Im Neuenheimer Feld 230, 6900, Heidelberg, Germany aut NATIONALLICENCE 700 1- Kratzmann Markus Zoological Institute I, University of Heidelberg, Im Neuenheimer Feld 230, 6900, Heidelberg, Germany aut NATIONALLICENCE 700 1- Alberti Gerd Zoological Institute I, University of Heidelberg, Im Neuenheimer Feld 230, 6900, Heidelberg, Germany aut NATIONALLICENCE 773 0- Experimental & Applied Acarology Kluwer Academic Publishers 15/1(1992-07-01), 49-57 0168-8162 15:1<49 1992 15 10493 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer