Abstract
Callus formation from stems, leaf stipules and leaf veins of gall wasp-susceptible and-resistant chestnut trees was studied to clarify the difference in gall growth induced by wasps in both varieties.
Comparing with the susceptible variety “Çne-17”, the resistant variety “Ginyose” showed equal or greater callus formation when their tissues were cultured on media containing auxins or Cytokinin. Further, there were no differences between several susceptible and resistant varieties with regard to callus formation from young stems on the same media as above or on a medum containing the larval extract. A similar result was obtained from the growth of sub-cultured callus derived from stems of these varieties.
In conclusion, it can be said that callus formation from young tissues of chestnut varieties in response to plant hormones has no relationship to their susceptibility or resistance to gall wasps.
