Reference health
Organization of the nif genes in cyanobacteria in symbiotic association with Azolla and Anthoceros
20/20 checkable references clean · checked 2026-07-23
Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a retraction, withdrawal, or removal notice.
5 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.
The 20 checked references that resolve
resolves10.1007/BF00397709
Pure culture and reconstitution of the Anthoceros-Nostoc symbiotic association
resolves10.1016/0168-9452(85)90103-7
The structural nif genes of four symbiotic Anabaena azollae show a highly conserved physical arrangement
resolves10.1007/BF00422316
Antigenic differences between Anabaena azollae fresh from the Azolla fern leaf cavity and free-living cyanobacteria
resolves10.1038/314419a0
Rearrangement of nitrogen fixation genes during heterocyst differentiation in the cyanobacterium Anabaena
resolves10.1128/AEM.52.5.1123-1127.1986
<i>Azolla filiculoides</i>
Nitrogenase Activity Decrease Induced by Inoculation with
<i>Chlamydomonas</i>
sp
resolves10.1146/annurev.mi.40.100186.002521
Organization of the Genes for Nitrogen Fixation in Photosynthetic Bacteria and Cyanobacteria
resolves10.1016/S0021-9258(19)57464-6
Genetic mapping of the chromosome of the cyanobacterium, Anabaena variabilis. Proximity of the structural genes for nitrogenase and ribulose-bisphosphate carboxylase.
resolves10.1128/jb.169.6.2471-2475.1987
Regulation of expression of glutamine synthetase in a symbiotic Nostoc strain associated with Anthoceros punctatus
resolves10.1007/BF00020630
Different organization of nif genes in nonheterocystous and heterocystous cyanobacteria
resolves10.1016/0006-291X(82)91993-3
Antigenic similarity among Anabaena azollae separated from different species of Azolla
resolves10.1016/0092-8674(86)90013-9
Identification and sequence of a gene required for a developmentally regulated DNA excision in anabaena
resolves10.1007/BF00402954
Fixation of [13N]N2 and transfer of fixed nitrogen in the Anthoceros-Nostoc symbiotic association
resolves10.1007/BF00693395
Assimilation of exogenous and dinitrogen-derived13NH 4 + byAnabaena azollae separated fromAzolla caroliniana Willd
resolves10.1002/j.1460-2075.1986.tb04173.x
Differences in mRNA levels in Anabaena living freely or in symbiotic association with Azolla.
resolves10.1016/S0021-9258(18)33636-6
Isolation and physical mapping of nitrogen fixation genes from the cyanobacterium Anabaena 7120.
The 5 references without a DOI — listed, not checked
no DOI — not checkedFranche C, Cohen-Bazire G (1987) Evolutionary divergence in the nifK,D,H gene region among nine symbiotic Anabaena azollae and between Anabaena azollae and some free-living heterocystous cyanobacteria. Symbiosis 3:159?178
no DOI — not checkedManiatis Y, Fritsch EF, Sambrook J (1982) Molecular cloning: A laboratory manual. Cold Spring Harbor Laboratory, Cold Spring Harbor, New York
no DOI — not checkedPeters GA, Calvert HE (1983) The Azolla-Anabaena symbiosis. In: Goff LJ (ed) Algal symbiosis. University Press Cambridge, pp 109?145
no DOI — not checkedPeters GA, Ray TB, Mayne BC, Toia RE Jr (1980) Azolla-Anabaena association: morphological and physiological studies. In: Newton WE, Orme-Johnson WH (eds) Nitrogen fixation, vol II. University Park Press, Baltimore, pp 293?309
no DOI — not checkedTel-Or E, Sandovsky T (1982) The response of the nitrogen-fixing cyanobacterium Anabaena azollae to combined nitrogen compounds and sugar. Isr J Bot 31:329?336
What this badge says. CiteStamped means the CHECKABLE references of this
work were clean at the dated check: each resolved to a known work in a public registry, and none
carried a retraction notice at that time. It says nothing about the quality, findings,
or importance of the work itself, and nothing about references deposited without a DOI.
checked 2026-07-23 — re-checked daily as this page is visited; titles and statuses come from Crossref and DataCite and are not part of the signed record
Embed this badge
Both snippets point at the live badge image and link back to this page. The badge re-renders from the daily check, so an embed never goes stale by more than a day of visits.
<a href="https://citestamp.com/citestamped/10.1007/bf00409719"><img src="https://citestamp.com/citestamped/10.1007/bf00409719/badge.svg" alt="CiteStamped reference-health badge" width="460" height="64"></a>
[](https://citestamp.com/citestamped/10.1007/bf00409719)