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Early stages of nodulation in roots of Oxytropis arctobia (Leguminosae) induced by the arctic rhizobial strain N31
Author(s) -
Prévost Danielle,
Bal Arya K.
Publication year - 1994
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/j.1756-1051.1994.tb00616.x
Subject(s) - biology , botany , arctic vegetation , bacteria , rhizobium , root nodule , nitrogen fixation , microbiology and biotechnology , arctic , ecology , genetics , tundra
Early stages of nodulation of roots of the arctic legume Oxytropis arctobia by the arctic rhizobial strain N31 was characterized under controlled conditions. Root hair deformation occurred as a result of inoculation of seedlings. Infection threads were seen invading target cells in the root cortex of the newly formed nodule tissue. In emergent nodules, bacteria remained surrounded by a moderately electron‐dense matrix, within the intercellular space. The target cells were rich in lipid bodies, proplastids, mitochondria and polyribosomes. Fibrillar material, microfilaments and small vesicles were present at the point of bacterial release, where the infection thread was devoid of its wall. Bacteria were found to be encircled by plasmalemma invaginations forming “symbiosomes”. Lipid bodies were present near the membrane of the infection thread, close to the site of bacterial release, and in close association with plasmalemma.