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Development of auxin autotrophy in Nicotiana tabacum callus cultures
Author(s) -
Szabó M.,
Köves E.,
Somogyi I.
Publication year - 1994
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1994.tb00398.x
Subject(s) - auxin , nicotiana tabacum , callus , biology , ethylene , botany , habituation , metabolism , biochemistry , neuroscience , gene , catalysis
Changes of auxin and ethylene metabolism of Nicotiana tabacum var. Xanthi callus were investigated in relation to auxin‐independent growth. During the habituation process, changes occur progressively in hormone metabolism in auxin‐heterotrophic tissues: the potential for the destruction of indoleacetic acid (IAA) increases, the IAA level in the cultures rises slightly, and the auxin sensitivity of the callus becomes modified. Preceding the onset of habituation, ethylene production is enhanced although the tissues retain their ability to undergo regeneration. Gradual changes in auxin metabolism and ethylene production confirm the epigenetic character of the habituation process.