The N-substituted phthalimide AC 94377 (1-(3-chlorophthalimido)-cyclohexanecarboxamide) was equally effective as a mixture of the gibberellins A4 and A7 (GA4/7) in breaking dormancy and stimulating germination of celery seeds when either was used in combination with ethephon or daminozide as a seed soak. Whereas seedlings emerging from GA4/7-treated seeds became etiolated in comparison with those from untreated seeds, those from AC 94377-treated seeds showed normal development. Preharvest sprays of gibberellic acid (GA3) increased the height of mature plants in comparison with untreated controls by about 16 per cent whereas AC 94377 was ineffective. The yield from GA3-treated plots was about 10 per cent greater than that from AC 94377-treated plots.
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Gott, K.A., Thomas, T.H. Comparative effects of gibberellins and an N-substituted phthalimide on seed germination and extension growth of celery (Apium graveolens L.). Plant Growth Regul 4, 273–279 (1986). https://doi.org/10.1007/BF00028170
- Apium graveolens L.
- Cladosporium spp.
- extension growth
- seed germination