Non-deep physiological dormancy in seeds of Euphorbia jolkinii Boiss. native to Korea

Oh, Hyo-Jung; Shin, Un Seop; Lee, Seung Youn; Kim, Sang Yong; Jeong, Mi Jin

doi:10.1186/s41610-021-00194-x

Cited by 3 publications

(5 citation statements)

References 23 publications

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“…The shape of its seeds varies, the average size of seeds was 1.15 × 0.81 mm (length × width), and the structure of the embryo was assumed to be a fully developed miniature axile shape. Generally, seeds with MD or MPD have small and underdeveloped embryos [16,27,28] and the ratio of E:S is 0.5 or less [29]. We confirmed that the E:S ratio in L. coreana seeds was 0.84 ± 0.04.…”

Section: Discussionsupporting

confidence: 72%

“…Whereas those that underwent WS at 25/15 • C did not germinate or had very low germination rates under most incubation condition (Table 1, S1). Therefore, dormancy type of L. coreana seeds are closer to non-deep PD than intermediate PD (require CS treatment with 2-3 months) [29]. The CS of seeds naturally occurred when they are exposed to consistent temperatures of 0-1 • C in snow-covered soil over the winter.…”

Section: Discussionmentioning

confidence: 99%

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Non-Deep Physiological Dormancy in Seed and Germination Requirements of Lysimachia coreana Nakai

Baek

Kwak

et al. 2021

Horticulturae

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This study aimed to determine the type of seed dormancy and to identify a suitable method of dormancy-breaking for an efficient seed viability test of Lysimachia coreana Nakai. To confirm the effect of gibberellic acid (GA3) on seed germination at different temperatures, germination tests were conducted at 5, 15, 20, 25, 20/10, and 25/15 °C (12/12 h, light/dark), using 1% agar with 100, 250, and 500 mg·L−1 GA3. Seeds were also stratified at 5 and 25/15 °C for 6 and 9 weeks, respectively, and then germinated at the same temperature. Seeds treated with GA3 demonstrated an increased germination rate (GR) at all temperatures except 5 °C. The highest GR was 82.0% at 25/15 °C and 250 mg·L−1 GA3 (4.8 times higher than the control (14.0%)). Additionally, GR increased after cold stratification, whereas seeds did not germinate after warm stratification at all temperatures. After cold stratification, the highest GR was 56.0% at 25/15 °C, which was lower than the GR observed after GA3 treatment. We hypothesized that L. coreana seeds have a non-deep physiological dormancy and concluded that 250 mg·L−1 GA3 treatment is more effective than cold stratification (9 weeks) for L. coreana seed-dormancy-breaking.

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Section: Discussionsupporting

confidence: 72%

Section: Discussionmentioning

confidence: 99%

Non-Deep Physiological Dormancy in Seed and Germination Requirements of Lysimachia coreana Nakai

Baek

Kwak

et al. 2021

Horticulturae

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“…In the seed dormancy classification system of Baskin and Baskin (2021), the response of seed germination to dry storage treatment is also one of the indicators of the level of PD, that is, dry storage treatment can promote germination of some seeds with non-deep PD and shorten the time of cold moist stratification treatment of seeds with intermediate PD but has no effect on seeds with deep PD (Baskin and Baskin, 2014;Oh et al, 2021). In this study, the dry storage treatment for 8 months at 20 °C significantly promoted the germination of T. hassleriana seeds at 5-15 °C but extended the time of the subsequent cold moist stratification treatment (Figure 3, Table 1).…”

Section: Discussionmentioning

confidence: 99%

“…Alternating temperatures generally promote seed germination more than constant temperatures (Baskin and Baskin, 2004;Forti et al, 2020). An alternating temperature treatment can increase the level of germination-promoting phytohormones and decrease the level of germination-inhibiting phytohormones (Huarte et al, 2014;Özden et al, 2021). Compared to the initial germination of freshly harvested T. hassleriana seeds at constant temperature , the 20 °C/30 °C alternating temperature treatment could effectively release seed dormancy and promote germination, regardless of alternating light or darkness, whereas the germination rate in alternating light was significantly higher than that in darkness (P < 0.05), being more than 90%, while the 15°C/25°C alternating temperature treatment did not show a significant effect on seed germination (Figure 2).…”

Section: Discussionmentioning

confidence: 99%

Dormancy and germination characteristics of Tarenaya hassleriana (Cleomaceae) seeds

Ren-Fei,

Xue-Yang,

Zi-Han

et al. 2023

J. Seed Sci.

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Elucidating the physiological and ecological mechanisms of seed dormancy and germination is of great significance for species conservation and the application of plant resources. Based on Baskin and Baskin’s classification system for seed dormancy, the cause of dormancy in Tarenaya hassleriana (Cleomaceae) seeds was studied using alternating temperature, cold moist stratification, dry storage, and GA3 soaking treatment. The results indicated that fresh mature T. hassleriana seeds had a combinational dormancy, including a physical dormancy and a type 2 non-deep physiological dormancy, and were photoblastic, with an optimal germination temperature of 35°C. In addition, fresh mature T. hassleriana seeds may be efficiently released from dormancy and promoted to germinate by an alternating temperature of 20 °C/30 °C, cold moist stratification, and cold moist stratification following dry storage. Furthermore, GA3 soaking treatment could also promote dormancy release and subsequent germination at 35 °C, and dry storage treatment could promote dormancy release and subsequent germination at 5-15 °C. These results also suggested that there were complex cross-talks among phytohormone, osmotic potential, and the temperature signaling regulatory pathways during dormancy release and germination of T. hassleriana seeds, which deserve further study.

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“…Phytohormones are widely used during dormancy-break and germination of seeds. Among them, exogenous GAs such as GA 3 , GA 4 , GA 7 , and GA 4+7 , have been used to overcome PD or MPD, enhance germination, promote embryo growth, and stimulate radicle emergence in many plant species [20][21][22][23][24][25][26]. However, GAs does not enhance germination in all plant species, and seed germination may be inhibited depending on the method, immersion time, and/or concentration of GA solution used.…”

Section: Introductionmentioning

confidence: 99%

Dormancy-release and germination improvement of Korean bellflower (Campanula takesimana Nakai), a rare and endemic plant native to the Korean peninsula

Kim,

Lee

et al. 2023

PLoS ONE

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Korean bellflower (Campanula takesimana Nakai) is a rare and perennial herb with medicinal and ornamental values, is endemic to the Ulleung Island of Korea. In this study, we investigated the dormancy-release and germination characteristics of C. takesimana (Campanulaceae) seeds by subjecting them to varying temperatures (5, 10, 15, 20, and 25°C and diurnal/nocturnal temperatures of 15/6, 20/10, and 25/15°C), cold stratification periods (0, 4, 8, or 12 weeks at 5°C), and gibberellic acid (GA3) concentrations (0, 10, 100, or 1,000 mg·L-1 at 15/6°C and 25/15°C) to identify the ideal seed propagation conditions. The seeds were stimulated to germinate (at 25°C, 12-h photoperiod with fluorescent lamps at 40 ± 10 μmol∙m-2∙s-1) after cold stratification. To examine the germination characteristics, the seeds were tested for water imbibition and found to readily absorb water. The seeds exhibited underdeveloped embryos during dispersal, showed final germination of 37.00% ± 4.43 at 25°C and were not influenced by temperature. The seeds subjected to 0, 4, 8, or 12 weeks of cold stratification germinated at a success rate of 22.00% ± 4.76, 87.00% ± 6.80, 79.00% ± 2.52, and 77.00% ± 1.91, respectively. Additionally, the germination characteristics, which were based on final germination, mean germination time, and germination velocity (Timson index), were significantly greater in the seeds pretreated with 1,000 mg·L-1 GA3 at 25/15°C than in seeds pretreated with 0 mg·L-1 GA3. Overall, the seeds broke dormancy with GA3 and short-term cold stratification. Therefore, we concluded that C. takesimana seeds have non-deep, simple, morphophysiological dormancy, and pretreatment with cold stratification and GA3 is required for effective seed propagation.

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Non-deep physiological dormancy in seeds of Euphorbia jolkinii Boiss. native to Korea

Cited by 3 publications

References 23 publications

Non-Deep Physiological Dormancy in Seed and Germination Requirements of Lysimachia coreana Nakai

Non-Deep Physiological Dormancy in Seed and Germination Requirements of Lysimachia coreana Nakai

Dormancy and germination characteristics of Tarenaya hassleriana (Cleomaceae) seeds

Dormancy-release and germination improvement of Korean bellflower (Campanula takesimana Nakai), a rare and endemic plant native to the Korean peninsula

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