Crops ›› 2021, Vol. 37 ›› Issue (3): 173-177.doi: 10.16035/j.issn.1001-7283.2021.03.026

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Effects of Different Plant Growth Regulators on the Growth and Development of Flue-Cured Tobacco

Wang Huifang1(), Zhang Xi1, Feng Xiaohu2, Li Yifan3, Zhang Hong1, Zhao Songchao1, Zhao Mingqin1()   

  1. 1College of Tobacco, Henan Agricultural University, Zhengzhou 450002, Henan, China
    2Fuzhou Branch of Jiangxi Provincial Tobacco Company, Fuzhou 344000, Jiangxi, China
    3Danzhou Company of Hainan Tobacco Company, Danzhou 571700, Hainan, China
  • Received:2020-09-03 Revised:2021-04-15 Online:2021-06-15 Published:2021-06-22
  • Contact: Zhao Mingqin E-mail:1293948854@qq.com;zhaomingqin@henau.edu.cn

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Abstract:

To understand the effects of plant growth regulators on the growth and development of flue-cured tobacco, Yunyan 87 was used as the plant material. The field experiment was conducted to study the effects of microbial inoculants, rooting powder, and epibrassinolide on the agronomic characteristics, antioxidant enzymes, polyphenol oxidase(PPO), root vatality, and chemical composition contents of flue-cured tobacco leaves. The results showed that plant growth regulators had effects on tobacco plant agronomic characteristics, root vatality, enzymes related to peroxidation indicators, and chemical compositions. With the growth of tobacco plants in each treatment, the activity of peroxidase(POD) gradually increased, and the activity of PPO showed a down-up-down trend. Compared with the treatments of CK and epibrassinolide, root irrigation with microbial inoculants and root soaking with rooting powder increased the plant height, stem circumference, maximum leaf length, maximum leaf width, and the leaf number of effective leaves. After 45 days of transplanting, the activities of POD and PPO were improved, root vitalities were enhanced, and the chemical compositions of flue-cured tobacco leaves were more coordinated. Taken together, the application of microbial inoculants for root irrigation and rooting powder soaking can improve the growth and development of flue-cured tobacco and improve the quality of tobacco leaves.

Key words: Growth regulator, Flue-cured tobacco, Agronomic characteristic, Enzyme activity, Root vitality, Chemical composition

Table 1

The measures of each treatment"

处理Treatment 措施Measure
AC 常规育苗管理措施
A1 常规育苗管理措施+微生物菌剂灌根
A2 常规育苗管理措施+生根粉浸根
A3 常规育苗管理措施+表油菜素内酯喷施

Table 2

Statistics of agronomic traits of flue-cured tobacco grown under different treatments"

项目
Item		 处理
Treatment		 移栽后天数Days after transplanting(d)
45 60 75
株高Plant height (cm) AC 9.90±1.56b 48.00±6.67b 90.60±1.82b
A1 11.80±0.84a 56.60±4.67ab 93.10±2.84a
A2 12.60±1.34a 57.80±4.97a 96.80±8.26a
A3 10.70±0.84ab 55.20±4.66ab 91.80±3.42a
有效叶片数Number of effective blades AC 10.60±0.89b 12.60±1.14b 15.20±1.48a
A1 11.20±0.84a 15.00±0.71a 17.30±0.58a
A2 11.80±0.45a 15.00±0.71a 17.00±1.87a
A3 10.80±0.45b 13.20±1.30b 16.00±1.58a
茎围Stem circumference (cm) AC 5.60±4.20b 8.50±0.61b 9.80±0.57b
A1 5.60±0.42b 9.00±0.50a 10.60±0.55b
A2 6.70±2.14a 9.40±0.96a 11.10±1.88a
A3 5.60±0.42b 8.50±0.50a 10.00±0.50b
最大叶长Maximum leaf length (cm) AC 41.80±1.25b 62.30±5.45b 75.30±4.41b
A1 45.00±2.55a 67.10±1.56a 76.00±1.53b
A2 43.00±3.59a 66.90±6.11a 80.60±7.33a
A3 43.00±2.12b 66.40±3.45a 75.30±4.41b
最大叶宽Maximum leaf width (cm) AC 17.20±3.17a 28.90±2.43a 31.70±1.15a
A1 18.00±2.15a 31.20±1.60a 33.00±2.62a
A2 17.80±0.91a 29.70±3.23a 33.60±1.99a
A3 18.50±0.87a 29.00±2.74a 32.30±1.79a

Fig.1

Peroxidase activity of flue-cured tobacco of different treatments in different periods Different lowercase letters indicate significant differences between treatments (P < 0.05), the same below"

Fig.2

Polyphenol oxidase activity of flue-cured tobacco of different treatments in different periods"

Fig.3

Vitality of flue-cured tobacco roots of different treatments in different periods"

Table 4

Routine chemical contents of leaves after different treatments %"

等级Grade 处理Treatment 总糖Total sugar 还原糖Reducing- sugar 烟碱Nicotine 氯Chlorine 钾Potassium
C3F AC 28.45±0.73b 23.26±0.63b 2.11±0.10a 0.39±0.05a 2.06±0.07b
A1 32.97±1.05a 25.89±0.12a 1.74±0.05b 0.19±0.04c 2.44±0.04a
A2 33.22±1.23a 23.68±0.43b 1.82±0.08b 0.30±0.08b 2.38±0.12a
A3 32.61±1.18a 23.25±0.33b 2.18±0.10a 0.32±0.04b 2.12±0.14b
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