Chitosan Soaking Improves Seed Germination of Platycodon Grandiflorus and Enhances Its Growth, Photosynthesis, Resistance, Yield, and Quality

Platycodon grandiflorus is a medical, ornamental, and edible traditional Chinese medicine whose seed germination and plant growth are frequently restricted by dormancy and stresses. In this study, we investigated how chitosan soaking affected seed germination, growth, photosynthesis, resistance, yie...

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Bibliographic Details
Published in:Horticulturae 2022-10, Vol.8 (10), p.943
Main Authors: Liu, Hai, Zheng, Zhihong, Han, Xue, Zhang, Cheng, Li, Haitao, Wu, Mingkai
Format: Article
Language:English
Subjects:
Adaptability
Agricultural production
Agriculture
Cell division
Chitosan
Chlorophyll
Dormancy
Drought
Enzymatic activity
Enzyme activity
Germination
growth
Herbal medicine
Leaves
Medical research
Medicinal plants
Ornamental plants
Photosynthesis
Plant growth
Platycodon grandiflorus
resistance
Seed germination
Seeds
Soaking
Traditional Chinese medicine
Transpiration
Variance analysis
Water use
Water use efficiency
yield
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Summary:Platycodon grandiflorus is a medical, ornamental, and edible traditional Chinese medicine whose seed germination and plant growth are frequently restricted by dormancy and stresses. In this study, we investigated how chitosan soaking affected seed germination, growth, photosynthesis, resistance, yield, and quality of P. grandiflorus. The results indicated that chitosan soaking had a preferable enhancing effect on seed germination of P. grandiflorus, which significantly (p < 0.05) promoted its germination rate, energy, and index, as well as cotyl and radicle length. Furthermore, 0.15–0.20% chitosan soaking effectively enhanced the leaf growth, height, stem diameter, and overground part dry weight of P. grandiflorus and reliably improved their leaves’ chlorophyll, photosynthetic rate, transpiration rate, and water use efficiency. Moreover, 0.15–0.20% chitosan soaking effectively enhanced the stress resistance and adaptability of P. grandiflorus via increasing its resistance substances and triggering its defense enzyme activity. Meanwhile, 0.15–0.20% chitosan soaking effectively improved the underground part growth and medical quality of P. grandiflorus. This study highlights that chitosan can be used as a favorable, efficient, and economical candidate or promoter for enhancing seed germination of P. grandiflorus and improving its growth, photosynthesis, resistance, yield, and quality; it also highlights that 0.15–0.20% chitosan is a suitable concentration.
ISSN:2311-7524
2311-7524
DOI:10.3390/horticulturae8100943