Viability of dried vegetative trichomes, formation of akinetes and heterocysts and akinete germination in some blue-green algae under water stress

被引:19
作者
Agrawal, SC [1 ]
Singh, V [1 ]
机构
[1] Univ Allahabad, Dept Bot, Allahabad 211002, Uttar Pradesh, India
关键词
D O I
10.1007/BF02903715
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Almost all dried vegetative trichomes of Anabaena iyengarii, Westiellopsis prolifica and Nostochopsis lobatus died within 1 h, while those of Oscillatoria acuminata retained viability to some extent for 1 d under similar storage conditions. The viability of dried vegetative trichomes of O. acuminata decreased about equally on storage at 20 degrees C in the light or in the dark, but dropped rapidly at 12 and 0 degrees C in the dark. Vegetative trichomes of A. iyengarii, N. lobatus and W. prolifica were more sensitive to frost than those of O. acuminata, and this correlated with their low resistance to desiccation because both types of exposure involved osmotic stress. Both dried and wet akinetes of A. iyengarii, W. prolifica and N. lobatus were about equally viable when stored at 20 degrees C in the light or the dark or at 12 and 0 degrees C in the dark, but their germination ability decreased on storage at 0 degrees C. The water stress imposed on growing vegetative trichomes either in high-agar media or in NaCl-supplemented liquid media reduced the survival of O. acuminata trichomes, decreased or totally suppressed akinete and heterocyst formation and akinete germination in A. iyengarii, W. prolifica and N. lobatus. The sensitivity decreased in the sequence A. iyengarii < W. prolifica approximate to N. lobatus. The akinete germination in all three blue-green algae was more sensitive to physiological water stress than their formation. In all of them, akinetes formed under water stress were equally viable as those formed under normal conditions. Trichomes of O. acuminata became broader when grown in 0.5-0.8 mol/L NaCl-supplemented media, probably due to polyol accumulation, and they also developed a thin sheath-like structure.
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页码:411 / 418
页数:8
相关论文
共 17 条
[1]   Viability of dried vegetative cells and the formation and germination of reproductive structures in Pithophora oedogonia, Cladophora glomerata and Rhizoclonium hieroglyphicum under water stress [J].
Agrawal, SC ;
Singh, V .
FOLIA MICROBIOLOGICA, 1999, 44 (01) :63-70
[2]   CONTRIBUTION OF BENTHIC BLUE-GREEN-ALGAL RECRUITMENT TO LAKE POPULATIONS AND PHOSPHORUS TRANSLOCATION [J].
BARBIERO, RP ;
WELCH, EB .
FRESHWATER BIOLOGY, 1992, 27 (02) :249-260
[3]   Effect of desiccation on envelopes of the cyanobacterium Chroococcidiopsis sp (Chroococcales) [J].
Caiola, MG ;
Billi, D ;
Friedmann, EI .
EUROPEAN JOURNAL OF PHYCOLOGY, 1996, 31 (01) :97-105
[4]  
CAMERON RE, 1966, 32971 JET PROP LAB, P1
[5]  
ERDMANN N, 1984, Archiv fuer Hydrobiologie Supplement, V67, P431
[7]  
HAWES I, 1992, POLAR BIOL, V12, P587
[8]  
HOF T., 1933, REC TRAV BOT NEERLAND, V30, P140
[9]  
LEVITT J, 1958, PROTOPLASMATOLOGIA, V8, P1, DOI DOI 10.1007/978-3-7091-5463-2
[10]   ECOLOGICAL OBSERVATIONS ON PLANKTONIC CYANOPHYTE GLEOTRICHIA-ECHINULATA [J].
ROELOFS, TD ;
OGLESBY, RT .
LIMNOLOGY AND OCEANOGRAPHY, 1970, 15 (02) :224-&