Abstract
The four Helianthus annuus (sunflower) inbred lines examined showed different abilities to convert 1-aminocyclopropane-1-carboxylic acid (ACC) to ethylene and different morphological responses to exogenous ACC, however, ACC had no effect on precocious flowering. The greatest effect of ACC was seen with inbred SS405B where it suppressed shoot growth and induced hypocotyl enlargement and callus induction. The greatest response did not correlate with the highest ethylene production. Although each inbred responded differently, callus induction and hypocotyl enlargement observed in hypocotyl segments treated with naphthalene acetic acid and benzyladenine could be partially explained as ethylene-mediated effects of the two hormones. It is suggested that inbred differences could be due to different endogenous hormone levels and/or different sensitivities to them.
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Abbreviations
- ACC:
-
1-aminocyclopropane-1-carboxylic acid
- AVG:
-
aminoethoxyvinylglycine
- BA:
-
benzyladenine
- NAA:
-
naphthalene acetic acid
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Communicated by P. Maliga
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Robinson, K.E.P., Adams, D.O. & Lee, R.y. Differential physiological and morphological responses of inbred lines to the ethylene precursor 1-aminocyclopropane-1-carboxylic acid by cultured Helianthus annuus (sunflower) shoot tips. Plant Cell Reports 6, 405–409 (1987). https://doi.org/10.1007/BF00272769
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DOI: https://doi.org/10.1007/BF00272769