Effects of Boron and Silicon on Control Efficacy of Potato Virus Y Disease and Antioxidant Defense Activities of Flue-cured Tobacco

doi:10.11924/j.issn.1000-6850.casb2024-0329

Abstract

Abstract:

In order to provide reference for rational fertilization and green disease prevention and control in flue-cured tobacco, the effects of boron and silicon nutrient elements on the diseases prevention and control and the physiological mechanism were discussed. The field experiment was conducted to study the effects of different boron and silicon application levels on the incidence of potato virus Y (PVY) disease and defense enzyme activity of flue-cured tobacco named ‘Yunyan 100’. The results showed that the application of boron and silicon reduced the incidence and disease index of PVY in flue-cured tobacco. Compared with the treatment of spraying water (CK), the incidence and disease index of PVY under 9.0 kg/hm²boron+ 6.0 kg/hm²silicon treatment decreased by 32.5% and 22%, respectively. Meanwhile, reasonable application of boron and silicon fertilizer significantly improved the defense enzymes activities of tobacco leaves, and the phenylalanine degradation enzyme activity and proline content were significantly increased by 121.4%-426.5% and 30.0%-74.3%, respectively. Correlation analysis showed that the incidence of PVY was significantly negatively correlated with proline content, while phenylalanine degradation enzyme activity was significantly positively correlated with proline content. The combined application of 9.0 kg/hm²boron+ 6.0 kg/hm²silicon could reduce the occurrence of diseases and induce the increase of defense enzyme activity.

Key words: boron, silicon, flue-cured tobacco, potato virus Y disease, antioxidant defense activities

CHEN Fen, LI Kai, ZHANG Xuemei, LI Yinglong, DUAN Kefan, CAO Hengmao, GAO Xin, ZHANG Jinghua, HUANG Min, DONG Yu. Effects of Boron and Silicon on Control Efficacy of Potato Virus Y Disease and Antioxidant Defense Activities of Flue-cured Tobacco[J]. Chinese Agricultural Science Bulletin, 2025, 41(4): 108-113.

Figures/Tables 4

References 33

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处理	硼用量（以纯硼计）	硅用量（以纯硅计）
CK	0.0	0.0
T1	4.5	0.0
T2	9.0	0.0
T3	0.0	3.0
T4	0.0	6.0
T5	4.5	3.0
T6	4.5	6.0
T7	9.0	3.0
T8	9.0	6.0

处理	硼用量（以纯硼计）	硅用量（以纯硅计）
CK	0.0	0.0
T1	4.5	0.0
T2	9.0	0.0
T3	0.0	3.0
T4	0.0	6.0
T5	4.5	3.0
T6	4.5	6.0
T7	9.0	3.0
T8	9.0	6.0