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Research Journal of Seed Science
  Year: 2021 | Volume: 14 | Issue: 1 | Page No.: 27-38
DOI: 10.3923/rjss.2021.27.38
 
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Determination of Optimum Germination Temperature and Dormancy Breaking Method for Seeds of Wild Herb

Yuting Nie, Fengxue Sun, Kailun Cui, Tingzheng Jiang, Juan Sun and Huifang Yan

Abstract:
Background and Objective: Low germination and high dormancy are common phenomena in many wild herbs of great value, however, the optimum germination temperatures and dormancy breaking methods have not yet been studied. Suaeda salsa, Suaeda crassifolia, Chenopodium glaucum, Descurainia sophia, Amaranthus retroflexus and Alopecurus myosuroides are common wild herbs in China, which are traditionally used in edible, forage, herbal medicine and chemical industry. Therefore, this study was carried out to determine the optimum germination conditions of the above six wild herb seeds. Materials and Methods: Two tests were conducted in this study, the first determining the optimum germination temperature for seeds and the second exploring the dormancy breaking method for dormant species. The effects of four constant temperatures (20, 25, 30 and 35°C), five alternating temperatures (5<=>15, 10<=>20, 15<=>25, 20<=>30 and 25<=>35°C) and four dormancy breaking methods of 0.2% potassium nitrate (KNO3), 7-days pre-chilling (PC7), 0.2% KNO3+PC7 and 0.8% sodium hydroxide (NaOH) were studied. Results: The results showed that the seeds of S. salsa, S. crassifolia and A. retroflexus had no dormancy and the optimum germination temperatures were 20, 35 and 35°C, respectively. However, the seeds of C. glaucum, D. sophia and A. myosuroides had different levels of dormancy and the optimum germination conditions were all 0.2% KNO3+PC7 and alternating temperature of 15<=>25°C. In addition, the first and final count time of germination of these six wild seeds was also determined. Conclusion: For non-dormant seeds of S. salsa, S. crassifolia and A. retroflexus, the optimum germination temperatures were 20, 35 and 35°C but for dormant seeds of C. glaucum, D. sophia and A. myosuroides, the combination of 0.2% KNO3+PC7 and 15<=>25°C was the optimum germination condition.
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How to cite this article:

Yuting Nie, Fengxue Sun, Kailun Cui, Tingzheng Jiang, Juan Sun and Huifang Yan, 2021. Determination of Optimum Germination Temperature and Dormancy Breaking Method for Seeds of Wild Herb. Research Journal of Seed Science, 14: 27-38.

DOI: 10.3923/rjss.2021.27.38

URL: https://scialert.net/abstract/?doi=rjss.2021.27.38

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