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Mechanism allowing an insect to survive complete dehydration and extreme temperatures

M. Watanabe, T. Kikawada, N. Minagawa^*, F. Yukuhiro and T. Okuda

National Institute of Agrobiological Sciences, Ohwashi 1-2, Tsukuba, Ibaraki 305-8634, Japan
^* Present address: Department of Biological Sciences, State University of New York, Buffalo, NY 14260, USA

View larger version (71K): [in a new window]   Fig. 1. P. vanderplanki during recovery from cryptobiosis. (A) Larva recovering from cryptobiosis at 0, 8, 16, 32 and 44 min after rehydration. (B) Decapitated cryptobiotic larva. (C) Decapitated larva on the second day after rehydration.

View larger version (19K): [in a new window]   Fig. 2. Change of trehalose level in P. vanderplanki larvae during desiccation. Intact, dry: intact larvae (filled circles); -H, dry: decapitated larvae (open triangles); -HT, dry: larvae from which the head and thoraces were removed (open circles); -H, wet: decapitated larvae in water (open squares). There were significant differences in trehalose content 12 h after desiccation in intact larvae, at 48 h and 72 h after desiccation in -H larvae, and at 48 h after dessication in -HT larvae (Mann—Whitney U test, P<0.05). Values are means ± S.D., N=3-9.