Anhydrobiosis without trehalose in bdelloid rotifers

被引:122
作者
Lapinski, J [1 ]
Tunnacliffe, A [1 ]
机构
[1] Univ Cambridge, Inst Biotechnol, Cambridge CB2 1QT, England
关键词
anhydrobiosis; trehalose; desiccation tolerance; bdelloid rotifer;
D O I
10.1016/S0014-5793(03)01062-7
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Eukaryotes able to withstand desiccation enter a state of suspended animation known as anhydrobiosis, which is thought to require accumulation of the non-reducing disaccharides trehalose (animals, fungi) and sucrose (plants), acting as water replacement molecules and vitrifying agents. We now show that clonal populations of bdelloid rotifers Philodina roseola and Adineta vaga exhibit excellent desiccation tolerance, but that trehalose and other disaccharides are absent from carbohydrate extracts of dried animals. Furthermore, trehalose synthase genes (tps) were not found in rotifer genomes. This first observation of animal anhydrobiosis without trehalose challenges our current understanding of the phenomenon and calls for a re-evaluation of existing models. (C) 2003 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:387 / 390
页数:4
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