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

doi:10.1007/s11703-010-1051-5

Front Agric Chin

2011, Vol. 5

Issue (1) : 45-50 https://doi.org/10.1007/s11703-010-1051-5

RESEARCH ARTICLE

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

Lei BI¹, Yuxing ZHANG¹(

), Bharat Kumar POUDYAL²

1. College of Horticulture, Agricultural University of Hebei, Baoding 071001, China; 2. Department of Agriculture, Fruit Development Directorate, Kirtipur, Kathmandu, Nepal

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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

Corresponding Author(s): ZHANG Yuxing,Email:jonsonzhyx@yahoo.com.cn

Issue Date: 05 March 2011

Cite this article:

Yuxing ZHANG,Bharat Kumar POUDYAL,Lei BI. Effects of growth regulators on the respiration metabolism of pear buds during dormant period[J]. Front Agric Chin, 2011, 5(1): 45-50.

URL:

https://academic.hep.com.cn/fag/EN/10.1007/s11703-010-1051-5
https://academic.hep.com.cn/fag/EN/Y2011/V5/I1/45

Fig.1 Changes in the intensity of respiration of dormancy buds

Fig.2 Changes of respiratory pathway of dormancy buds

Fig.3 Effects of regulators on respiratory intensity of dormancy buds

Tab.1 Effects of integration treatment on respiratory intensity of dormancy buds

Fig.4 Effects of regulators on phosphopentose pathway of dormancy buds

Tab.2 Effects of integration treatment on phosphopentose pathway of dormancy buds

Fig.5 Effects of regulators on tricarboxylic acid cycle of dormancy buds

Tab.3 Effects of integration treatment on tricarboxylic acid cycle of dormancy buds

Fig.6 Effects of regulators on glycolytic pathway of dormancy buds

Tab.4 The effect of integration treatment on glycolytic pathway of dormancy buds

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