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[Study on allelopathic effect of ginseng root exudates against its root callus]
Cai Shao1, Ying-ping Wang, Shi-quan Xu
1Institute of Special Wild Economic Animal and Plant Science, CAAS., Jilin 132109, China. shaocai2003@163.com
Summary
Ginseng root exudates harm ginseng root callus by damaging cell membranes and inhibiting growth. This allelopathic effect explains continuous cropping obstacles in ginseng cultivation.
Area of Science:
- Plant Physiology
- Allelopathy
- Cell Biology
Background:
- Continuous cropping of ginseng is hindered by obstacles.
- Root exudates are suspected to cause these obstacles.
Purpose of the Study:
- Investigate the allelopathic effects of ginseng root exudates on ginseng root callus.
- Provide a theoretical basis for understanding allelopathic mechanisms and continuous cropping issues.
Main Methods:
- Ginseng root callus was cultured in MS medium at varying concentrations (5-80 gDW/mL).
- Allelopathic effects on malondialdehyde (MDA) and DNA content were assessed.
- Cellular changes were observed using the paraffin slice method.
Main Results:
- MDA content initially increased significantly then decreased.
- DNA content progressively decreased over time.
- Nucleoli diminished, disaggregated, and disappeared, indicating cellular damage.
Conclusions:
- Ginseng root exudates exhibit allelopathy, disrupting callus cell membrane function.
- Exudates interfere with nucleolar quantity, inhibiting cell division and differentiation.
- This leads to suppressed growth of ginseng root callus, contributing to continuous cropping obstacles.
