| Different responses of endogenous hormones and germinating and sprouting to bud\|notching of different ways in apple branches |
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| DOI：10.7606/j.issn.1000-7601.2020.02.21 |
| Key Words: apple bud\|notching endogenous hormones content germination rate sprouting rate |
| Author Name | Affiliation | | WANG Haifen | College of Horticulture Science and Technology, Hebei Normal University of Science & Technology, Chang Li, Hebei 066600, China | | YUAN junwei | China Changli Research Institute of Pomology，Hebei Academy of Agriculture and Forestry Sciences，Changli, Hebei 066600，China | | ZHANG haie | China Changli Research Institute of Pomology，Hebei Academy of Agriculture and Forestry Sciences，Changli, Hebei 066600，China | | ZHANG Jingzheng | College of Horticulture Science and Technology, Hebei Normal University of Science & Technology, Chang Li, Hebei 066600, China | | CAO Fei | College of Horticulture Science and Technology, Hebei Normal University of Science & Technology, Chang Li, Hebei 066600, China | | GUO Chunlei | College of Horticulture Science and Technology, Hebei Normal University of Science & Technology, Chang Li, Hebei 066600, China | | ZHANG Lili | College of Horticulture Science and Technology, Hebei Normal University of Science & Technology, Chang Li, Hebei 066600, China | | QI Yongshun | College of Horticulture Science and Technology, Hebei Normal University of Science & Technology, Chang Li, Hebei 066600, China |
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| Abstract: |
| In order to reveal the different response of endogenous hormones and germinating and sprouting to bud notching of different ways and the mechanism that endogenous hormones regulate the bud germinating in apple branches, juvenile branches of 3-year-old trees of Malus pumila ‘Middle-Autumn King’ were treated with different ways including bud\|notching all (T1), bud\|notching in base (T2), middle (T3), upper (T4) parts of a branch, and no bud\|notching as control to study the relationship between dynamics of endogenous hormones and sprouting in branches. The results showed that the germination rate and sprouting rate were significantly increased by 9.3% and 171.7%, respectively (P<0.05). There was a significant positive correlation (P<0.01) between the germination rate and sprouting rate with a correlation coefficient of 0.643. There was a significant positive correlation and a negative correlation (P<0.05) between the germination rate and long shoot rate and short shoot rate with a correlation coefficients of 0.594 and -0.613, respectively. After buds cutting, the highest IAA and GA3 contents in the cut part of shoots increased by 26.5% and 40.3%, respectively, while the highest ABA content decreased by 66.1%. The ZT/IAA ratio after 7 days of bud\|cutting and the ZR/GA3 ratio after 14 days of bud\|cutting had the best correlation with the bud germination rate with a correlation coefficients of -0.731 and -0.719, respectively, which indicated that these two indexes had the greatest regulation effect on bud germination. |
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