Frontiers of Agriculture in China

, Volume 5, Issue 1, pp 45–50

Effects of growth regulators on the respiration metabolism of pear buds during dormant period

Research Article
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Abstract

The effects of growth regulators on the respiration metabolism of pear buds during dormant period were studied in this experiment. The results showed that, during early dormant period, the respiration intensity of pear buds was infirm and increased slowly. As the weather became very cold, the respiration intensity rapidly declined, and after that it changed a little. In the later stage of dormant period, the respiration intensity rose rapidly. The maximum value appeared on January 4th, at 0.390 mo1 O2·g−1 FW·min−1, but thereafter declined to its original level. Under natural conditions, three respiratory pathways showed different changes. Pentose phosphate pathway might be the main reason for dormancy release in pear buds. The exogenous gibberellins were more efficient than salicylic acid in increasing the respiration rate. The exogenous SA appeared to play a more important role than exogenous GA3 in phosphopentose pathway. The effect of gibberellins would be more effective than SA in tricarboxylic acid cycle (TCA). The respiration rate of glycolysis was not affected by gibberellins and salicylic acid.

Keywords

pear dormancy respiration intensity growth regulators 

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References

  1. Abbott D L (1955). Temperature and the dormancy of apple seeds. Proc 14th Intern Hort Cong, 1: 746–753Google Scholar
  2. Bogatek K A (1997). Respiratory activity of apple seeds during dormancy removal and germination. Physiol Veg, 22(2): 181–191Google Scholar
  3. Boilek B M (1953). The respiration of acer buds in relation to the inception and termination of the winter rest. Plant Physiol, 6(1): 47–64CrossRefGoogle Scholar
  4. Donohue K, Dorn L, Griffith C, Kim E, Aguilera A, Polisetty C R, Schmitt J (2005). Niche construction through germination cueing: life-history responses to timing of germination in Arabidopsis thaliana. Evolution, 59(4): 771–785PubMedGoogle Scholar
  5. Finch-Savage W E, Leubner-Metzger G (2006). Seed dormancy and the control of germination. New Phytol, 171(3): 501–523PubMedCrossRefGoogle Scholar
  6. Garcia J L, Sponsel V M, Gaskin P (1987). Gibberellins in developing fruits of Pisuni sativum cv. Alaska: studies on their role in pod growth and seed development. Planta, 170(1): 130–137CrossRefGoogle Scholar
  7. Gubler F, Millar A A, Jacobsen J V (2005). Dormancy release, ABA and pre-harvest sprouting. Curr Opin Plant Biol, 8(2): 183–187PubMedCrossRefGoogle Scholar
  8. Hilhorst H W M (1995). A critical update on seed dormancy. I. Primary dormancy. Seed Sci Res, 5(2): 61–73CrossRefGoogle Scholar
  9. Li X L, Yuan Z Y, Gao D S (2001). Factors that influence bud dormancy in deciduous fruit trees. Shandong Univ (Nat Sci), 32(3): 386–392Google Scholar
  10. Myking T (1997). Effects of constant and fluctuating temperature on time to budburst in Butula pubescens and its relation to bud respiration. Trees (Berl), 12(2): 107–112Google Scholar
  11. Nir G, Shulman Y, Fanberstein L (1986). Changes in the activity of catalase (EC1.11.1.6) in relation to the dormancy of grapevine (vitis vinifera L.) buds. Plant Physiol, 81(4): 1140–1142PubMedCrossRefGoogle Scholar
  12. Ögren E (2000). Maintenance respiration correlates with sugar but not nitrogen concentration in dormant plants. Physiologia Plantarum, 108(3): 295–299CrossRefGoogle Scholar
  13. Shulman Y, Nir G, Fanberstein L, Lavee S (1983). The effect of cyanamide on the release from dormancy of grapevine buds. Scientia Hort, 19: 97–104CrossRefGoogle Scholar
  14. Sponsel V M (1983). The localization, metabolism and biological activity of gibberellins in maturing and germinating seeds of Pisum sativum cv. Progress No.9. Planta, 159(5): 454–468CrossRefGoogle Scholar
  15. Vegis A (1964). Dormancy in higher plants. Annu Rev Plant Physiol, 15(1): 185–224CrossRefGoogle Scholar
  16. Wang S Y, Jiao H J, Faust M (1999). Change in the activities of catalase, peroxidase, and polyphenol oxididase in apple buds during bud break induced by thidiazuron. Journal of Plant Growth Regulation, 10: 33–39CrossRefGoogle Scholar

Copyright information

© Higher Education Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.College of HorticultureAgricultural University of HebeiBaodingChina
  2. 2.Department of AgricultureFruit Development DirectorateKirtipur, KathmanduNepal

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