Dormancy-breaking and germination requirements of Thalictrum squarrosum Stephan ex Willd. seeds with underdeveloped embryos

Zhang, Keliang; Ji, Yusong; Fu, Guixian; Yao, Linjun; Liu, Huina; Tao, Jun

doi:10.1016/j.jarmap.2021.100311

Cited by 7 publications

(9 citation statements)

References 30 publications

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“…Water availability highly affected the germination percentage, seedling growth rate, and the accumulated dry matter: the more severe the hydro stress, the more significant the reduction in these traits' values. There are hydro limitations and potential ranges for each state of germination and seedling growth, as presented in other studies [67].…”

Section: Water Amount Experimentsmentioning

confidence: 95%

Impact of Temperature and Water on Seed Germination and Seedling Growth of Maize (Zea mays L.)

et al. 2022

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Germination and seedling development are essential stages in a plant’s life cycle, greatly influenced by temperature and moisture conditions. The aim of this study was to determine maize (Zea mays L.) seeds’ germination and seedling development under various abiotic stresses. Eight different temperature levels, 5, 10, 15, 20, 25, 30, 35, and 40 °C, were used. Drought and waterlogging stresses were tested using 30 water levels based on one-milliliter intervals and as percentages of thousand kernel weight (TKW) at 20 and 25 °C. Seedling density and the use of antifungals were also examined. Temperature significantly affected germination duration and seedling growth, and 20 °C was found to be ideal with an optimal range of less than 30 °C. Germination occurred at 25% of the TKW. The optimal water range for seedling growth was higher and broader than the range for germination. Seed size assisted in defining germination water requirements and providing an accurate basis. The present research established an optimum water supply range of 150–325% of the TKW for maize seedling development. A total of 6 seeds per 9 cm Petri dish may be preferable over greater densities. The technique of priming seeds with an antifungal solution before planting was observed to have a better effect than applying it in the growth media.

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Section: Water Amount Experimentsmentioning

confidence: 95%

Impact of Temperature and Water on Seed Germination and Seedling Growth of Maize (Zea mays L.)

et al. 2022

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“…This process accelerates radicle emergence by breaking down the endosperm barriers. Numerous studies have documented that endogenous phytohormones, particularly GAs and ABA, play a regulatory role in seed dormancy and germination [ 22 , 46 , 47 , 48 ]. Furthermore, the combination of fluridone, a different class of phytohormone from the GAs used in the current study, with ER exhibited positive effects on germination characteristics, as evidenced by improvements in the MGT, TI, and GPI compared to the nontreated seeds (with endocarp) ( Figure 4 ).…”

Section: Discussionmentioning

confidence: 99%

Methods for Improving the Germination of Rhodotypos scandens (Thunb.) Makino Seeds through Endocarp Removal

Kim,

Lee

et al. 2024

Plants

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Rhodotypos scandens (Thunb.) Makino is known to have a seed dispersal that is thick and stony (endocarp + seeds) and has potential as a landscaping tree seed. In several Rosaceae species, seeds are covered with a hard endocarp, making the internal seeds water-impermeable and germination difficult. Here, we analyzed the morphoanatomical traits and germination properties of R. scandens seeds. To identify ideal seed propagation conditions, we immersed R. scandens seeds in sulfuric acid for varying durations and subjected them to phytohormone (gibberellic acid A3 and fluridone) and a cold stratification (CS) (5 °C) treatment after endocarp removal (ER). The R. scandens stony seeds did not increase in mass by ≥25.0%. Following ER, the seed mass increased by ≥50.0% with water absorption when compared to the initial dry mass. Seed surfaces showed damage and cracks through scarification after 1 h of immersion in sulfuric acid, failing to germinate. A combination of ER, phytohormone treatment, and CS improved seed germination compared to ER alone (26.0 ± 5.3%). Overall, R. scandens seeds showed a dispersal with a hard endocarp from the parent plant, and a pre-treatment with ER, phytohormones, and CS was required for effective seed propagation.

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“…There are nine levels of MPD that have been established, which are further divided into two types: simple and complex, based on temperatures required for embryo development. In simple MPD, embryo development can be observed under warm stratification (≥ 15 °C), while in complex MPD, embryo development can be observed under cold stratification (about 0 to 10 °C) [ 7 , 12 , 28 ]. In our study, we observed embryo growth of A. barbatum occurred at cold temperature (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…At 0, 1, 3, 6, 9, 12, 24, and 48 h of water absorption, the seeds in the Petri plates were removed, dried, weighed, and replaced into each dish. Percent increase of fresh mass was determined below: % W r = [( W f – W i )/ Wi ]×100, where W r , W i , and W f are percent increase in mass, original seed mass as well as mass following a specific period, respectively [ 12 ].…”

Section: Methodsmentioning

confidence: 99%

“…Many temperate species with MD have another physiological mechanism that induces seed dormancy, also referred to as morphophysiologically dormant (MPD) [ 9 – 11 ]. Nine MPD levels are determined based on the following factors: (1) temperature needed for breaking seed dormancy; (2) temperature necessary for embryo development, as well as (3) ability to replace cold/warm stratification by GA 3 to break dormancy [ 7 , 12 ].…”

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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Dormancy-breaking and germination requirements of Thalictrum squarrosum Stephan ex Willd. seeds with underdeveloped embryos

Cited by 7 publications

References 30 publications

Impact of Temperature and Water on Seed Germination and Seedling Growth of Maize (Zea mays L.)

Impact of Temperature and Water on Seed Germination and Seedling Growth of Maize (Zea mays L.)

Methods for Improving the Germination of Rhodotypos scandens (Thunb.) Makino Seeds through Endocarp Removal

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

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