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Morphological and physiological properties of symbiotic cyanobacteria
Author(s) -
VAGNOLI L.,
MARGHERI M. C.,
And G. ALLOTTA,
MATERASSI R.
Publication year - 1992
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1992.tb05660.x
Subject(s) - phycobiliprotein , cyanobacteria , biology , nostoc , cycad , azolla , botany , phycoerythrin , symbiosis , gymnosperm , heterocyst , anabaena , bacteria , flow cytometry , genetics
SUMMARY The main morphological and physiological characters of several symbiotic cyanobacterial strains, isolated from different plant—cyanobacteria associations ( Anthoceros, Azolla , cycads and Gunnera ) were investigated. All the strains showed heterocystous immotile filaments and motile hormogonia, typical of the genus Nostoc. In accordance with their symbiotic origin, all were found capable of photoheterotrophic growth. On the basis of the morphological and physiological properties and the phycobiliprotein content, the isolates from Azolla appeared very close to each other and quite distinct from the other cyanobionts. The latter showed many characteristics in common, such as marked tendency to produce hormogonia, synthesis of C‐phycoerythrin and rather small dimensions of the akinetes. With regard to the cycad cyanobionts, there was no correlation between the properties of the isolates and the host plants.