Physiological dormancy and dormancy release of Sassafras tzumu, a colored-leaf tree species with high landscape and economic value

Chen, H; Jiang, J; Liu, J; Tan, Zengdong; Li, Y

doi:10.3832/ifor4031-015

Cited by 2 publications

(1 citation statement)

References 41 publications

(46 reference statements)

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“…The seeds have the characteristics of deep dormancy, which can partially germinate after 2-3 years in the natural state (Qiang et al, 2007). After the dormancy-breaking treatment, the dormancy can be broken after 2-8 months of low temperature stratification (Wu et al, 2021;Chen et al, 2022;Peng et al, 2023). P. subhirtella and P. sibirica belong to the genus Prunus of the Rosaceae, have relatively shallow dormancy characteristics and still require H 2 SO 4 corrosion, gibberellin (GA) immersion and stratification to break the dormancy (Wang et al, 2008;Khudonogova et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic trends in TZ staining analysis of six deep dormancy seeds

Peng,

Wu,

Huang

et al. 2024

Seed Sci. Res.

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The assessment of seed quality and physiological potential is essential in seed production and crop breeding. In the process of rapid detection of seed viability using tetrazolium (TZ) staining, it is necessary to spend a lot of labour and material resources to explore the pretreatment and staining methods of hard and solid seeds with physical barriers. This study explores the TZ staining methods of six hard seeds (Tilia miqueliana, Tilia henryana, Sassafras tzumu, Prunus subhirtella, Prunus sibirica, and Juglans mandshurica) and summarizes the TZ staining conditions required for hard seeds by combining the difference in fat content between seeds and the kinship between species, thus providing a rapid viability test method for the protection of germplasm resources of endangered plants and the optimization of seed bank construction. The TZ staining of six species of hard seeds requires a staining temperature above 35 °C and a TZ solution concentration higher than 1%. Endospermic seeds require shorter staining times than exalbuminous seeds. The higher the fat content of the seeds, the lower the required incubation temperature and TZ concentration for staining, and the longer the staining time. And the closer the relationship between the two species, the more similar their staining conditions become. The TZ staining method of similar species can be predicted according to the genetic distance between the phylogenetic trees, and the viability of new species can be detected quickly.

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Section: Introductionmentioning

confidence: 99%

Phylogenetic trends in TZ staining analysis of six deep dormancy seeds

Peng,

Wu,

Huang

et al. 2024

Seed Sci. Res.

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Study on Desiccation Tolerance and Biochemical Changes of Sassafras tzumu (Hemsl.) Hemsl. Seeds

Peng,

Wang,

et al. 2023

Forests

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The deciduous tree species Sassafras tzumu (Hemsl.) Hemsl., unique to China, holds significant economic and ecological value. However, its seeds exhibit poor storage tolerance and rapid decline in seed vigor. This study primarily investigates the desiccation tolerance of S. tzumu seeds. The results show that S. tzumu seeds have recalcitrant seed characteristics, with a semi-inactivation water content (at which point half of the seeds lose viability) of 20.7%. As desiccation progresses, seed viability decreases significantly; at a reduced water content of 11.93%, only 18.3% of the seeds remain viable, while most lose their viability completely. Relative electrolytic leakage (REC) and H2O2 content gradually increase during this process, while MDA content initially decreases before increasing again, exhibiting distinct trends compared to antioxidant enzyme activities such as superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT). SOD and POD activities exhibit an initial increase followed by a rapid decrease, whereas CAT activity shows a decline followed by a rapid increase. Dehydration to 15% water content in seeds is a key turning point in the process of seed desiccation in S. tzumu, and CAT is an enzyme key to maintaining seed viability. Both the accumulation of toxins and the decline in the activity of the antioxidant system contribute to the susceptibility of S. tzumu seeds to drought stress, a characteristic common to all recalcitrant seeds. To maintain high seed viability above 70% during storage, it is crucial to ensure water content above 23.58%.

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Physiological dormancy and dormancy release of Sassafras tzumu, a colored-leaf tree species with high landscape and economic value

Cited by 2 publications

References 41 publications

Phylogenetic trends in TZ staining analysis of six deep dormancy seeds

Phylogenetic trends in TZ staining analysis of six deep dormancy seeds

Study on Desiccation Tolerance and Biochemical Changes of Sassafras tzumu (Hemsl.) Hemsl. Seeds

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