Dating for mature adults associated content
Agrobacterium tumefaciens and Pseudomonas savastanoi are examples of gall-causing bacteria.Gall forming virus was found on rice plants in central Thailand in 1979 and named rice gall dwarf.
The Talmud, records using gallnuts as part of the tanning process as well as a dye-base for ink.Some galls act as "physiologic sinks", concentrating resources in the gall from the surrounding plant parts.Insect galls are usually induced by chemicals injected by the larvae or the adults of the insects into the plants, and possibly mechanical damage.In other plant species galls may be massive accumulations of fleshy tissue more than an inch in diameter.Some ectoparasitic nematodes (nematodes that live outside the plant in the soil), such as sting and stubby-root nematodes, may cause root tips to swell.Nodules are loosely attached to the root, while root-knot galls originate from infection at the center of the root, so they are an integral part of the root.
In addition, fresh Rhizobium nodules have a milky pink-to-brown liquid inside them, while root-knot galls have firmer tissues and contain female root-knot nematodes (creamy white beads less than 1/32 inch in diameter) inside the gall tissues. Galls are rich in resins and tannic acid and have been used in the manufacture of permanent inks (such as iron gall ink) and astringent ointments, in dyeing, and in tanning.
No serologic relationship was found between this virus and that of rice dwarf.
Nematodes are microscopic worms that live in the soil.
Insect galls are the highly distinctive plant structures formed by some herbivorous insects as their own microhabitats.
They are plant tissue which is controlled by the insect.
Some nematodes (Meloidogyne species or root-knot nematodes) cause galls on the roots of susceptible plants.