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Influence of different temperatures on bud break and 1-aminocyclopropane-1-carboxylic acid content of young peach trees

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El-Shereif A. R., Mizutani F., Onguso J. M., Hossain A. B. M. S.

Acta Physiologiae Plantarum

2006

tom 28

nr 5

Effects of different temperatures on bud break and 1-aminocyclopropane-1-carboxylic acid (ACC) content were determined by using potted two-year-old ‘Akatsuki’ peach trees. One group of trees were subjected to 1°C for four weeks and then transferred to a growth chamber at 24 °C, while the other was kept at 24 °C throughout the experiment. After four-week temperature treatments floral and vegetative bud break were evaluated weekly and bud break percentage was calculated. Bud break was greater under 1 °C than 24 °C in both November and December. The time required to release buds from dormancy was shorter in December than November. In November ACC content in peach buds increased after one and two weeks, then decreased in the forth week under both treatments. However, in December ACC content after two and four weeks showed a similar trend under 1 °C and a reverse trend under 24 °C. It was higher under low temperature treatment. These data indicate that chilling requirements for bud break of peach seems to be associated with the promotion of ethylene biosynthesis caused by low temperature stress.

Ograniczanie wyników

1 Acta Physiologiae Plantarum

1 El-Shereif A. R.

1 Hossain A. B. M. S.

1 Mizutani F.

1 Onguso J. M.

1 2006

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Influence of different temperatures on bud break and 1-aminocyclopropane-1-carboxylic acid content of young peach trees