The role of temperature in post-dispersal embryo growth and dormancy break in seeds of Aconitum lycoctonum L.

Vandelook, Filip; Lenaerts, Jelle; Jozef, A. Van Assche

doi:10.1016/j.flora.2008.11.003

Cited by 29 publications

(18 citation statements)

References 30 publications

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“…After completion of embryo elongation, seeds germinated quickly, within 30 days without any pre-treatment. Warm stratification actually reduced final germination percentage, as in other Ranunculaceae (Young et al, 1992;Vandelook et al, 2009). Therefore according to the classification of seed dormancy (Baskin and Baskin, 1998;2004) seeds of R. baudotii can be described as having morphological dormancy (MD).…”

Section: F O R M a T T E D P R O O F Discussionmentioning

confidence: 99%

Laboratory germination and seed bank storage of Ranunculus peltatus subsp. baudotii seeds from the Tuscan Archipelago

Carta

Bedini²,

Foggi³

et al. 2012

Seed Sci. Technol.

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Germination requirements and suitability for ex situ conservation were investigated for seeds from the only population of Ranunculus peltatus Schrank subsp. baudotii (Godron) Meikle ex C.D.K. Cook (Ranunculaceae) from the Tuscan Archipelago (Italy). A 2 × 2 × 3 factorial experiment investigated the interactive effects of light, alternating temperatures and mean temperature on the germination of seeds sown on agar. Logistic regression analysis showed significant effects of both temperature (P < 0.0001) and light (P < 0.05). Alternating temperatures improved germination but only at mean temperatures of 20 and 15°C. The results indicate that seeds of R. baudotii exhibit morphological dormancy and a phenological adaptation to seasonal ponds. Drying led to a significant reduction in germination in seeds collected in both 2009 and 2010 (P < 0.05); the reduction was larger for 2009. The better quality of the 2010 seed was probably due to a post-harvest treatment that enabled continued maturation of the seeds. Storage of seeds for one year under seed bank conditions (-20°C) did not reduce viability. Seeds of R. baudotii possess orthodox storage behaviour and are therefore suited to ex situ conservation in seed banks; however, further research is needed to confirm their long term storage prospects.

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Section: F O R M a T T E D P R O O F Discussionmentioning

confidence: 99%

Laboratory germination and seed bank storage of Ranunculus peltatus subsp. baudotii seeds from the Tuscan Archipelago

Carta

Bedini²,

Foggi³

et al. 2012

Seed Sci. Technol.

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“…Seeds were subjected to the following GA 3 treatments: a 25/15°C (120 days) fi 15/5°C+G A 3 (90 days) fi 15/5°C (150 days) (test substitution for winter temperature); b GA 3 + 15/5°C (90 days) fi 0°C (90 days) fi 15/5°C (180 days) (test substitution for summer temperature); c 25/ 15°C+G A 3 (120 days) fi 15/5°C (240 days) (test substitution for autumn and winter temperatures); d GA 3 +0°C (90 days) fi 15/5°C (270 days) (test substitution for summer and autumn temperatures). In a-d Control temperature sequence: 25/15°C (120 days) fi 15/5°C (90 days) fi 0°C (90 days) fi 15/5°C (60 days), embryo was fully elongated by 330 days after sowing (Vandelook and Van Assche 2009), Erythronium japonicum (Kondo et al 2002), Jeffersonia diphylla (Baskin and Baskin 1989)a n dGagea lutea (Kondo et al 2004). This shows that the overall seed dormancy and germination pattern in C. giganteum var.…”

Section: Ecological Implicationsmentioning

confidence: 99%

Seed dormancy and germination in the giant Himalayan lily (Cardiocrinum giganteum var. giganteum): an assessment of its potential for naturalization in northern Japan

Phartyal

Kondo

Baskin

et al. 2012

Ecological Research

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Understanding the potential for ornamental plant species to become naturalized in a nonnative habitat requires information on seed germination in order to help predict responses of the species to the natural environmental conditions of its new habitat. Cardiocrinum giganteum var. giganteum, which is native to the Himalayas, has been introduced as an ornamental plant in temperate regions of the world, and was categorized recently as invasive in New Zealand. Seed germination requirements of the species were determined under natural conditions in Hokkaido, Japan, to assess its potential to become naturalized in this region of Japan. Mature seeds were collected from its native range in the Indian Himalayas. At maturity in autumn, seeds had underdeveloped embryos, which grew in the second autumn and winter after exposure to summer temperatures. Radicles and cotyledons emerged in late winter and spring. Thus, an 18–19 month period was required from dispersal to seed germination. Under laboratory conditions, this period could be shortened to 10–11 months in a 25/15 °C (120 days) → 15/5 °C (90 days) → 0 °C (90 days) → 15/5 °C (60 days) temperature sequence. GA3 did not substitute for the above temperature requirements. These temperature requirements for seed germination of C. giganteum var. giganteum are very similar to those of its native Japanese congener C. cordatum var. glehnii. Seeds of both taxa have deep simple morphophysiological dormancy. The close similarity in the requirements for regeneration from seeds of the two taxa suggests that the seed stage of the life cycle is not an impediment to the naturalization of the giant Himalayan lily in northern Japan.

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“…Some examples of spring ephemerals native to South Korea are Adonis amurensis , Hepatica nobilis , Erythronium japonicum and Jeffersonia dubia (Kim et al ; Keddy ; Rhie et al ). The seeds of these ephemeral plants are known to be dispersed when the embryo is underdeveloped (Nomizu et al ; Vandelook et al, ) and are normally classified as morphophysiologically dormant (MPD) seeds (Baskin & Baskin , ).…”

Section: Introductionmentioning

confidence: 99%

Factors affecting the dormancy and germination of bleeding heart [Lamprocapnos spectabilis (L.) Fukuhara] seeds

et al. 2020

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Information on the optimal conditions to promote the germination of Lamprocapnos spectabilis (L.) Fukuhara seeds is limited; consequently, this study was conducted to establish the requirements to break seed dormancy and promote germination.• The selected seeds had morphophysiological dormancy and had not begun embryo development. To study the dormancy breaking and embryo development processes, seeds were subjected to constant or changing temperature treatments during moist stratification.• High temperature and humidity resulted in vigorous embryo growth, with the longest embryos occurring after 1 month of incubation at 20°C. At 4°C, the seeds required incubation period of at least 3 months to germinate. Embryo growth and germination were higher with changing high and low temperatures than under a constant temperature, and changing temperatures also considerably changed the endogenous hormone levels, embryo development and germination. Bioactive gibberellin (GA) content was higher in seeds incubated at 20°C for 1 month, then at 4°C for 2 months. The content of endogenous abscisic acid in seeds subjected to the same treatment decreased by 97.6% compared with that of the untreated seeds.• Embryo growth and seed germination require changing high and low temperatures; however, exogenous GA 3 could substitute for high temperatures, as it also causes accelerated germination. In this study, the seeds of L. spectabilis were identified as an intermediate simple type, a sub-level of morphophysiologically dormant seeds.Plant Biology 22 (2020) 514-521

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The role of temperature in post-dispersal embryo growth and dormancy break in seeds of Aconitum lycoctonum L.

Cited by 29 publications

References 30 publications

Laboratory germination and seed bank storage of Ranunculus peltatus subsp. baudotii seeds from the Tuscan Archipelago

Laboratory germination and seed bank storage of Ranunculus peltatus subsp. baudotii seeds from the Tuscan Archipelago

Seed dormancy and germination in the giant Himalayan lily (Cardiocrinum giganteum var. giganteum): an assessment of its potential for naturalization in northern Japan

Factors affecting the dormancy and germination of bleeding heart [Lamprocapnos spectabilis (L.) Fukuhara] seeds

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