%A Lei BI, Yuxing ZHANG, Bharat Kumar POUDYAL, Xiaolei WU, Jie LIU %T Effects of regulators on the respiratory enzyme of pear branches during dormant period %0 Journal Article %D 2011 %J Front. Agric. China %J Frontiers of Agriculture in China %@ 1673-7334 %R 10.1007/s11703-011-1127-x %P 538-542 %V 5 %N 4 %U {https://journal.hep.com.cn/fag/EN/10.1007/s11703-011-1127-x %8 2011-12-05 %X

The effects of regulators on the respiratory enzymes of Qiyuesu’s pear branches during dormant period were studied. The results showed that enzyme activities of SDH, G-6-PDH and 6-PGDH were increased by 0.02 mmol/L SA and 120 mg/L GA3. The enzyme activities of phosphohexoisomerase were reduced by 0.02 mmol/L SA and 120 mg/L GA3. Compared with the control, the PGI activity was reduced by 20.5% and 13.6% using 0.02 mmol/L SA and 120 mg/L GA3. Similarly, the SDH activity was increased by 6.1% and 29.2%, respectively. Likewise, the activity of G-6-PDH and 6-PGDH was increased by 93.9% and 24.8%. Changes of respiratory enzymes were consistent with respiratory pathway of regulators, which indicated that SA and GA3 were helpful to break the dormancy by enhancing activities of SDH, G-6-PDH and 6-PGDH.