268 Effect of Temperature on Micropropagated Apple Plants as a Way to Overcome Plant Growth Cessation During Acclimatization

in HortScience
View More View Less
  • 1FAEM/UFPel, P.O. Box 354, 96001-970, Pelotas-RS, Brazil; 2Embrapa Temperate Climate, P.O. Box 403, 96001-970, Pelotas-RS, Brazil

The present work aimed to evaluate the plant growth of the apple rootstock Marubakaido during the acclimatization process, after receiving different treatments of temperatures. Apple shoots were rooted in vitro and transplanted to greenhouse, where they remained for 2 weeks. After this period, the plants were treated under temperature of 4 ± 1 °C and 10 ± 1 °C, 16-h photoperiod at 5μmol·m-2·s-1 radiation for 0; 360, 720, 1080, and 1440 h. The plants were transferred to the greenhouse where their growth internode length and bud number were evaluated during 2 months. It was verified that there was an increase up to 697% in the height of the plants when they were treated for 1440 h, independently of the temperature. The internode length was also larger when the plants were treated for greater periods. The temperature of 10 ± 1 °C led to a decrease in the bud number, while at 4 ± 1 °C, significant differences were not observed. These results suggest that the use of higher temperatures (10 ± 1 °C), can also recover the plant growth during the acclimatization process.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 35 7 0
PDF Downloads 66 31 2