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Promotion of flowering in apple malus domestica cultivar golden delicious trees with gibberellin a 4 and c 3 epi gibberellin a 4



Promotion of flowering in apple malus domestica cultivar golden delicious trees with gibberellin a 4 and c 3 epi gibberellin a 4



Planta (Heidelberg) 165(2): 292-294



The proportion of spurs folowering on apple trees (Malus domestica Borkh. cv. Golden Delicious) displaying a high degree of alternate-year flowering was increased in the "off" year by gibberellin A4 (GA4) and C-3 epi-GA4 appplied in the previous year. When applied 4.5 weeks after anthesis amounts of GA4 ranging from 3 to 300 .mu.g per spur and 25 or 50 .mu.g of C-3 epi-GA4 per spur were effective. Treatments with GA4 made seven weeks after anthesis were less effective. A combination of 30 .mu.g GA4 and 30 .mu.g zeatin (6-(4-hydroxy-3-methylbut-trans-2-enylamino)purine) promoted flowering at both treatment times, and tended to be more effective than GA4 alone.

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Accession: 006200845

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