Indeterminate vs. Determinate nodules

Determiante nodule	Indeterminate nodules
1. Individual symbiosomes may fuse and/or bacteroids divide within the symbiosome leading to the formation of these nodules.	1. Symbiosomes further divide together within the bacteroid leading to a symbiosome containing a single- Bacteroide and hence form the indeterminate nodule.
2. They have a meristem at the periphery and this is only active at early stages of development.	2. They have persistent meristem at the apex.
3. They are spherical in shape.	3. They are generally cylindrical in shape.
4. In determinate nodules mature tissues completely surround the nodule and the vascular bundle.	4. They have meristem at the apex and this meristem add cells in proximal direction to the different nodules tissues, due to which mature tissue are absent at the nodule apex.
5. Determinate nodules are found on certain tribes of tropical legumes such as soybean, common bean and some temperate legumes such as lotus.	5. They are found in papilionid legumes such as pea, alfalfa and all mimosoid legumes.
6. infection thread origin is narrow, subtropical and tropical region.	6. infection thread origin is broad, temperate region.