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SPECIFICITY IN THE GUNNERA‐NOSTOC ENDOSYMBIOSIS
Author(s) -
BONNETT HOWARD T.,
SILVESTER WARWICK B.
Publication year - 1981
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.1469-8137.1981.tb04754.x
Subject(s) - endosymbiosis , botany , nostoc , biology , cyanobacteria , plastid , bacteria , biochemistry , genetics , chloroplast , gene
S ummary The cyanobacterium, Nostoc , and the angiosperm, Gunnera , form a symbiotic association in which glandular cells host an intracellular population of heterocystous Nostoc cells. Symbiotic and free‐living isolates of Nostoc and Anabaena were assayed for their ability to infect, fix nitrogen and supply nitrogen to Gunnera. The range of cyanobacteria acceptable to Gunnera was found to be circumscribed by the genus, Nostoc , but included six different isolates within that genus. The effectiveness of the various Nostoc isolates was compared in terms of their activities at both the inter and intracellular levels of symbiotic association.