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. 1982 Jul;151(1):411–419. doi: 10.1128/jb.151.1.411-419.1982

Structural studies of alfalfa roots infected with nodulation mutants of Rhizobium meliloti.

A M Hirsch, S R Long, M Bang, N Haskins, F M Ausubel
PMCID: PMC220253  PMID: 7085566

Abstract

Alfalfa roots infected with four nodulation defective (Nod-) mutants of Rhizobium meliloti which were generated by transposon Tn5 mutagenesis were examined by light and electron microscopy. In one class of Nod- mutants, which we can nonreactive, the bacteria did not induce root hair curling or penetrate host cells. In a second class of Nod- mutants, which we call reactive, the bacteria induced some root hair curling and entered root epidermal cells, although no infection threads were formed. In addition, reactive Nod- mutants induced extensive root hair proliferation and hypertrophied roots. This study presents the details of the phenotype of the association between each mutant strain and alfalfa roots.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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