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1980•Journal of the American Society for Horticultural ScienceOpen access

The Effect of GA3 Application on Flowering and Seed Production in Onion1

Fakhri Naamni, Haim D. Rabinowitch, Nachum Kedar

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Abstract

Abstract Mother bulbs of onion ( Allium cepa cv. Grano) were treated with gibberellic acid (GA 3 ) at 0, 50, 150 and 450 ppm upon emergence of first flower stems. A single application at 50 ppm shortened by one-half the time required for emergence of 80% of floral stems and increased the uniformity in height of the flower stalks. GA 3 -treated plants produced larger and more productive umbels, resulting in an increase in seed yield by about 30%. There was no difference in seed viability between treatments.

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Abstract Mother bulbs of onion ( Allium cepa cv. Grano) were treated with gibberellic acid (GA 3 ) at 0, 50, 150 and 450 ppm upon emergence of first flower stems. A single application at 50 ppm shortened by one-half the time required for emergence of 80% of floral stems and increased the uniformity in height of the flower stalks. GA 3 -treated plants produced larger and more productive umbels, resulting in an increase in seed yield by about 30%. There was no difference in seed viability between treatments.

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Available abstract

Abstract Mother bulbs of onion ( Allium cepa cv. Grano) were treated with gibberellic acid (GA 3 ) at 0, 50, 150 and 450 ppm upon emergence of first flower stems. A single application at 50 ppm shortened by one-half the time required for emergence of 80% of floral stems and increased the uniformity in height of the flower stalks. GA 3 -treated plants produced larger and more productive umbels, resulting in an increase in seed yield by about 30%. There was no difference in seed viability between treatments.

Key concepts: Umbel, Gibberellic acid, Allium, Biology, Horticulture, Yield (engineering), Botany, Gibberellin

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