Kan phalit phan yasup tanthan rok doi kan khatluak callus charoen chak protoplast sung mi khwam thonthan to toxin khong chua Pseudomonas lae Alternaria.
1985
Porntip Thanutong | Furuzawa I. | Yamamoto M.
Protoplast-derived calluses of tobacco (Nicotiana tabacum L. cv. Samsun) were selected for their resistance to toxins from Pseudomonas syringae pv. tabaci which caused wildfire disease, and from Alternaria alternata pathotype tobacco which caused brown spot on tobacco leaves. A number of plants were regenerated from each of the toxin-selected protoplast-derived calluses. A large percentage of the plants obtained from the second selection cycle calluses were resistant to infection by these pathogens. Resistance to wildfire disease, however, seems to be unrelated to resistance to brown spot disease. Variations in the morphological characteristics of the regenerated plants were found. Results of an assay of the R1 generation indicated that the resistance shown by Ro plants against both disease was heritable.
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