Bacteroid Notes: Definitions & Explanations PDF | Download eBooks
Study Bacteroid lecture notes PDF with biology definitions and explanation to study “What is Bacteroid?”. Study bacteroid explanation with biology terms to review biology course for online degree programs.
Bacteroid Definition:
Inside each nodule, Rhizobium bacteria assume a form called bacteroids, which are contained within vesicles formed in the root cells.
Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson
Bacteroid Notes:
The outer host-cell derived symbiosome membrane encloses a space called the symbisome space or the peribacteroid space that surrounds the endosymbiont. In order for the symbiosome to be established as a nitrogen-fixing unit the enclosed bacterium has to be terminally differentiated into a morphologically changed bacteroid. The bacterium in the soil is free-living and motile. In the symbiosome it has to change its gene expression to adapt to a non-motile, non-reproductive form as the bacteroid. This change is noted by an increase in the size of the bacterium and its elongation. The bacterial membrane is also made permeable.
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