Sand Priming Promotes Seed Germination, Respiratory Metabolism and Antioxidant Capacity of Pinus massoniana Lamb

Kaihui Zhai, Zhuangzhuang Ji, Diantian Jiang, Guangwu Zhao and Tailin Zhong
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Kaihui Zhai: The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Sciences, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
Zhuangzhuang Ji: The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Sciences, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
Diantian Jiang: The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Sciences, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
Guangwu Zhao: The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Sciences, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
Tailin Zhong: School of Urban Construction, Zhejiang Shuren University, Shaoxing 312028, China

Agriculture, 2022, vol. 12, issue 4, 1-10

Abstract: The validity to promote seed vigor of sand priming had been reported; however, its feasibility in pine seeds remained unknown. In this study, Masson pine ( Pinus massoniana Lamb.) seeds of three varieties were used to investigate the effect of sand priming on seed germination, respiratory metabolism and antioxidant capacity. Seeds treated with hydrated sand, about 5% moisture over 2 day, were employed as the priming group with non-primed seeds as the control. The germination test and field test showed that the germination rate, germination potential, vigor index and field emergence rate of sand-primed seeds were significantly enhanced by 8.3~12.3%, 3.9~11.5%, 40.4~72.3% and 5.8~8.9% compared to non-primed seeds. The oxygen-sensing test indicated that sand priming accelerated seed respiration. Besides these, antioxidant enzyme activities and endogenous GA 1 and IAA are also enhanced after sand-priming treatment. Furthermore, the variation tendency of gene expression of GID1 , POD and SDH was in line with the physiological parameters. Based on the results, the regulatory mechanism of germination promotion of the Masson pine by sand priming was clarified. Sand priming might promote respiratory metabolism, endogenous hormones and antioxidant capacity through influencing the related gene expression, which would have a conjoint promotion on the seed germination of Pinus massoniana .

Keywords: Pinus massoniana; sand priming; seed germination; respiratory metabolism; antioxidant capacity (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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