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| Effects of gibberellin and brassinolide on photosynthetic characteristic and tea fruit yield of tea plants |
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| KeyWord:gibberellin brassinolides tea plants photosynthetic characteristic oil content yield of single plant |
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| Abstract: |
| The effects of different mass concentrations of gibberellin (GA) and brassinolide (BR) and their interaction on photosynthetic characteristic and tea fruit yield of seed and leaf dual-use tea plants were explored. With five-year-old Jincha 1 as the test subject, a GA spray in mass concentrations of 0, 0.8, 1.0, 1.2 ,1.5 mg/L, BR spray in mass concentrations of 0, 0.3, 0.5, 0.8, 1.0 mg/L, and interaction of GA with BR in mass concentrations of 0 mg/L+0 mg/L,1.0 mg/L+0.5 mg/L,1.0 mg/L+0.8 mg/L,1.2 mg/L+0.5 mg/L, 1.2 mg/L+0.8 mg/L, were applied to tea plants during the oil transformation period of tea fruit,the fruit water content and seed oil content, leaf nitrogen content, chlorophyll content and photosynthetic characteristic,and biological characteristics and matured fruit yield of single plant during mature period were measured. The results showed that as the fruits matured, the water content of tea fruit gradually decreased, and the oil content of tea seed first increased and then decreased(except for the control), and the water content of tea fruit sprayed with GA, BR and their interaction treatments in same period was lower than that without exogenous hormone spraying, and the oil content of tea seed was higher than that without exogenous hormone spraying.When the plants were treated by GA(1.2 mg/L), BR(0.8 mg/L), or both(GA 1.0 mg/L+BR 0.8 mg/L)in mature period, the water contents of tea fruit were the lowest (21.17%, 25.75%, 20.13%), the oil contents of tea seed were the highest (35.97%, 33.52%, 36.17%), the yields of single plant were the highest (1.91,1.91, 1.95 kg). The chlorophyll content, nitrogen content and photosynthetic characteristic increased and then decreased as the fruit maturing. The mature tea fruit yield of single plant was significantly positive correlation with net photosynthetic rate, chlorophyll content, and mass of one seed, double seeds, triple seeds（p<0.01）. Therefore, spraying exogenous hormones to tea plants during the growth period can promote photosynthetic characteristic, increase the yield and oil content of tea fruit. |
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