Dormancy cycles in Aquilegia oxysepala Trautv. et Mey. (Ranunculaceae), a species with non-deep simple morphophysiological dormancy

Zhang, Keliang; Ji, Yusong; Fu, Guixian; Yao, Linjun; Liu, Huina; Tao, Jun; Walck, Jeffrey L.

doi:10.1007/s11104-021-04951-8

Cited by 7 publications

(6 citation statements)

References 41 publications

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“…1 ). Indeed, either combinational or physical dormancy had not been reported in seeds of Aconitum and those of other Ranunculaceae species [ 7 , 21 ]. In addition, the E/S ratio of fresh seeds was determined to be 0.33 ± 0.01, however, after cold stratification for a 10-week period (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Because the ripe embryo of the Ranunculaceae is typically tiny, this family may be in morphological or morphophysiological dormancy. For instance, seeds of Pulsatilla slavica have been suggested with MD [ 18 ]; seeds of Adonis vernalis [ 19 ], Anemone coronariab [ 20 ], Aquilegia oxysepala [ 21 ] show nondeep simple MPD; Seeds of Aconitella decipiens [ 19 ] were reported to have intermediate simple morphophysiological dormancy; seeds of Aconitum altaicum [ 19 ] show deep simple MPD; seeds of Actaea pachypoda [ 7 ], and A. racemosa [ 22 , 23 ] were reported to show deep simple epicotyl MPD, while seeds of Anemone ranunculoides [ 24 ] were reported to show nondeep simple epicotyl morphophysiological dormancy.…”

Section: Introductionmentioning

confidence: 99%

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Intermediate complex morphophysiological dormancy in seeds of Aconitum barbatum (Ranunculaceae)

Zhang

Liu

et al. 2023

BMC Plant Biol

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Background Seed dormancy and germination are key components of plant regeneration strategies. Aconitum barbatum is a plant commonly found in northeast China. Although it has potential for use in gardening and landscaping, its seed dormancy and regeneration strategy, which adapt to its natural habitat, are not well understood. Our aim was to identify conditions for breaking A. barbatum seed dormancy and determine its dormancy type. Embryo growth and germination were determined by collecting seeds over time in the field. Laboratory experiments that control light, temperature, and stratification period were conducted to assess dormancy breaking and germination, and GA3 was used to identify dormancy type. Results Seeds of A. barbatum have undeveloped embryos with physiological dormancy at maturity in autumn. The embryo-to-seed length ratio increases from 0.33 to 0.78 before the emergence of the radical. Under natural environmental conditions, embryo development begins in early winter. Laboratory experiments have shown that long-term incubation under 4 °C (cold stratification) promotes embryo development and seed dormancy break. With an extension of cold stratification, an increase in germination percentages was observed when seeds were transferred from 4 °C to warmer temperatures. Seeds exposed to light during incubation show a higher germination percentage than those kept in the dark. Seed germination can also be enhanced by a 100 mg/L GA3 concentration. Conclusions Seeds of A. barbatum display intermediate complex morphophysiological dormancy at maturity. In addition to the underdeveloped embryo, there are also physiological barriers that prevent the embryo from germinating. Dormancy breaking of A. barbatum seeds can be achieved by natural winter cold stratification, allowing seeds to germinate and sprout seedlings at the beginning of the following growing season. Our findings provide valuable insights into the seed dormancy and regeneration strategy of A. barbatum, which could facilitate its effective utilization in gardening and landscaping.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Intermediate complex morphophysiological dormancy in seeds of Aconitum barbatum (Ranunculaceae)

Zhang

Liu

et al. 2023

BMC Plant Biol

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“…Seeds were removed from the Petri dishes at 0, 0.5, 1, 2, 4, 6, and 8 h, then blotted dry, weighed, and replaced in each dish. The percentage increases in fresh mass (% Wr) were calculated by using the following formula: % Wr = [(Wf − Wi)/Wi] × 100, where Wi represents the initial weight of the seed and Wf refers to the weight of the seed after being dried for a specified period [11].…”

Section: Imbibition Testsmentioning

confidence: 99%

“…Seed dormancy is assumed to be a bet-hedging mechanism in plants allowing them to prevent sibling competition [8,9]. Seeds that are buried within a seed bank can sense several environmental conditions (such as light and temperature), which also adjusts the internal dormancy depth on a continuous basis to synchronize germination and seedling emergence at the appropriate time and space [10][11][12]. Five categories of dormancy have been identified in line with the classification strategy of seed dormancy: physical (PY), physiological (PD), combinational (PY + PD), morphological (MD), and morphophysiological (MD + PD; MPD) dormancy [13].…”

Section: Introductionmentioning

confidence: 99%

Seed Dormancy and Germination Requirements of Torilis scabra (Apiaceae)

Zhang

Liu

et al. 2023

Agronomy

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The timing of seed germination significantly affects the fitness and life cycle of plants. Torilis scabra is a perennial medicinal herb occurring in mixed forests but the increasing use and modification of forestlands in recent decades has led to the degeneration of its natural habitat. Nonetheless, the requirements for germination in T. scabra remain unclear. The present study focused on identifying conditions necessary to break T. scabra seed dormancy and describing its seed dormancy type. By periodically collecting seeds that were sown in the field, germination phenology was studied. The impact of light, temperature, and warm/cold stratification on breaking seed dormancy and promoting germination was also determined through incubating seeds in laboratory conditions. Additionally, the effect of GA3 was explored to more accurately identify the type of dormancy present. The results demonstrated that the seeds of T. scabra possessed small, undeveloped embryos with physiological dormancy at the time of maturity. In the field, embryo growth initiated in early spring and the embryo–seed length ratio increased by ~300% before the radical emerged. In the laboratory, the embryo–seed length ratio increased from 0.24 to 0.82 when seeds were subjected to cold stratification at 4 °C and then transferred to 15/25 °C. Germination was observed across a broad temperature range after cold stratification. GA3 also helped to break dormancy but after-ripening did not. Taken together, the results suggest that seeds of T. scabra have non-deep simple morphophysiological dormancy.

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“…In the soil seed bank, seeds can sense a range of environmental signals and continually adjust their dormancy status [72]. In the soil, seeds may undergo long-term cycles of dormancy release and induction without completing their germination [57,73,74]. Plant hormones and dormancy proteins can control the release and induction of dormancy, which are influenced by environmental factors during seed maturation and storage [7].…”

Section: The Seed Bank: a Rewarding Investmentmentioning

confidence: 99%

Environmental Regulation of Weed Seed Dormancy and Germination

Qaderi

2023

Seeds

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Many weeds produce dormant seeds that are unable to complete germination under favourable conditions. There are two types of seed dormancy: primary dormancy (innate dormancy), in which seeds are in a dormant state upon release from the parent plant, and secondary dormancy (induced dormancy), in which dormancy develops in seeds through some experience after release from the parent plant. Mechanisms of seed dormancy are categorized as embryo dormancy and coat-imposed dormancy. In embryo dormancy, the control of dormancy resides within the embryo itself, and in coat-imposed dormancy, it is maintained by the structures enclosing the embryo. Many factors can influence seed dormancy during development and after dispersal; they can be abiotic, biotic, or a combination of both. Most weeds deposit a large number of seeds in the seed bank, which can be one of two types—transient or persistent. In the transient type, all viable seeds in the soil germinate or die within one year, and there is no carry-over until a new crop is deposited. In the persistent type, at least some seeds survive in the soil for more than one year and there is always some carry-over until a new crop is deposited. Some dormant seeds require after-ripening—changes in dry seeds that cause or improve germination. Nondormant, viable seeds can germinate if they encounter appropriate conditions. In the face of climate change, including global warming, some weeds produce a large proportion of nondormant seeds, which germinate shortly after dispersal, and a smaller, more transient seed bank. Further studies are required to explore this phenomenon.

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Dormancy cycles in Aquilegia oxysepala Trautv. et Mey. (Ranunculaceae), a species with non-deep simple morphophysiological dormancy

Cited by 7 publications

References 41 publications

Intermediate complex morphophysiological dormancy in seeds of Aconitum barbatum (Ranunculaceae)

Intermediate complex morphophysiological dormancy in seeds of Aconitum barbatum (Ranunculaceae)

Seed Dormancy and Germination Requirements of Torilis scabra (Apiaceae)

Environmental Regulation of Weed Seed Dormancy and Germination

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