Imbibition phases and germination response of Mimosa bimucronata (Fabaceae: Mimosoideae) to water submersion

Kestring, Débora; Klein, Jeferson; Menezes, Luciana C. C. R.; Rossi, Marcelo

doi:10.1016/j.aquabot.2009.03.004

Cited by 18 publications

(12 citation statements)

References 30 publications

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“…The imbibition test revealed scarification was necessary for water uptake by seeds, thus confirming dormancy class of M. calodendron as physical. Although previous studies on other species of Mimosa were not concerned with a formal determination of dormancy class (sensu Baskin and Baskin 2004), it seems that impermeable seed coat is a widespread trait in the genus irrespective of its geographic distribution or ecological context (Kestring et al 2009;van Klinken and Goulier 2013). Altogether, these studies indicate that phylogenetic, rather than ecological, forces play a major role in determining dormancy class in Mimosa species.…”

Section: Discussionmentioning

confidence: 57%

Environmental control of seed dormancy and germination of Mimosa calodendron (Fabaceae): implications for ecological restoration of a highly threatened environment

et al. 2015

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Rupestrian grasslands over ironstone outcrop, locally named canga, are montane ecosystems with restricted distribution known to harbor an unusually a large number of endemic plant species. These communities are highly threatened due to their high sensitivity to habitat conversions and extreme low resilience derived from anthropogenic pressure. Ecological restoration attempts on degraded rupestrian grassland areas have not yet been successful. Mimosa calodendron is an endemic canga shrub thought to play a facilitator role and, therefore, may enhance seedling recruitment in degraded areas. Since dormancy and slow germination are key factors of the biology of seeds and may hamper their use in ecological restoration, this study aimed to investigate the environmental control of seed dormancy and germination of M. calodendron seeds. We tested the effect of mechanical scarification, light and different incubation temperatures on seed germination. The effect of scarification on water uptake by seeds was also measured. M. calodendron seeds have physical dormancy and scarification was an effective treatment to promote high and rapid germination. Heat treatment also increased germination percentage of nonscarified seeds, but was less efficient than scarification. Once water uptake occurred, germination took place under a broad thermal gradient, regardless of light condition. Therefore, the germination profile of M. calodendron seems to be suitable for uncomplicated use in restoration projects, requiring only a pretreatment for dormancy release.

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Section: Discussionmentioning

confidence: 57%

Environmental control of seed dormancy and germination of Mimosa calodendron (Fabaceae): implications for ecological restoration of a highly threatened environment

et al. 2015

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“…Short-term flooding stimulates seed germination of most species in soil seed banks, while prolonged flooding can cause the soil to form an anaerobic environment, as well as affect the vitality of plant seeds in the soil seed bank (Dixon 2003;H€ olzel and Otte 2004).There are considerable differences in the manner and ability of riparian plant seeds adapting to flooding (Wang et al 2009;Wagner and Oplinger 2017). Previous researches suggested that seeds with dormancy characteristics benefited from after-ripening caused by flooding during autumn and winter, during which the viability did not be significantly affected (Baskin et al 2013;Kestring et al 2009). Moderate flooding would not influence seed viability as it speeds up the seed dormancy (Baskin et al 2002).…”

Section: Discussionmentioning

confidence: 99%

“…The adaptive ability and mechanism of different plant seeds to submersion is relatively variable (Pierce and King 2007). It is thought that the viability of plant seeds with dormancy characteristics will not be significantly affected by flooding (Baskin et al 2002;Kestring et al 2009). The nutrient contents in seeds are related with the endurance and viability of seeds.…”

Section: Introductionmentioning

confidence: 99%

Effects of flooding on seed viability and nutrient composition in three riparian shrubs and implications for restoration

Chen

et al. 2018

Journal of Freshwater Ecology

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2018) Effects of flooding on seed viability and nutrient composition in three riparian shrubs and implications for restoration, Journal of Freshwater Ecology, 33:1, 449-460, ABSTRACTConstructions of large reservoirs (all over the world) have resulted in the degradation of riparian vegetation. The coverage and species biodiversity of riparian communities in the Three Gorges Reservoir area have dramatically decreased since the completion of the Three Gorges Project. The responses of three shrub seeds to flooding time were examined to investigate the potential use of soil seed banks for the ecological restoration of the drawdown zone in the Three Gorges Reservoir Area. The effects of flooding time on seed viability and seed nutrient composition for the riparian shrubs Buxus ichangensis, Cornus paucinervis and Distylium chinense were tested by simulating 0, 5, 6, 7, 8 and 9 month flooding periods under a controlled experiment. Results showed that seed viability decreased with the length of flooding treatment. Seeds of all three shrubs displayed relatively high viability and remained viable after six months of flooding. However, seed viability significantly decreased after seven months of flooding. After nine months of flooding, the seed viability of B. ichangensis, C. paucinervis and D. chinense decreased by 86.14%, 24.03% and 43.43%, respectively, compared with a non-flooded control. The protein, starch and soluble sugar content of seeds from the three shrubs decreased with flooding time. The seed bank samples of D. chinense and B. ichangensis showed the highest tolerance against short-term flooding, while the seeds of C. paucinervis exhibited the strongest tolerance against long-term flooding. ARTICLE HISTORY

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“…However, long‐term submersion can cause changes in soil oxygen content, water content, and temperature, which in turn affect seed germination in soil seed banks (Vidal, Andrade, Andrade, & Mielke, ; Wang, Jiang, Lu, & Wang, ). Plant seeds maintain their own physiological activities under submerged conditions through anaerobic respiration, often consuming a large amount of nutrients, which is relatively inefficient relative to aerobic respiration (Gomes & Garcia, ; Kestring, Klein, & Rossi, ). The vitality of plant seeds decrease and their germination capability is gradually lost after prolonged submersion (Dixon, ; Vidal, et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…Plant seeds maintain their own physiological activities under submerged conditions through anaerobic respiration, often consuming a large amount of nutrients, which is relatively inefficient relative to aerobic respiration (Gomes & Garcia, 2013;Kestring, Klein, & Rossi, 2009). The vitality of plant seeds decrease and their germination capability is gradually lost after prolonged submersion (Dixon, 2003;Vidal, et al, 2014).…”

Section: Effects Of Reversal Seasonal Submersion On the Germinationmentioning

confidence: 99%

Effects of reverse seasonal submersion on the germination and persistence of soil seed banks in hydro‐fluctuation belts

Chen

et al. 2018

Ecohydrology

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The construction of the Three Gorges Dam has resulted in the occurrence of reverse seasonal water‐level fluctuations. The species composition and quantity of riparian soil seed banks collected from four hydro‐fluctuation belts were assessed by simulating different submersion cycles to determine the effects of reverse seasonal water‐level fluctuations on the germination and persistence of soil seed banks in the Three Gorges Reservoir Region. Results showed the number of species that germinated from the soil seed bank decreased with submersion. The number of germinated seeds in soil seed banks after submersion for 7 months in Xingshan, Zigui, Wanzhou, and Zhongxian decreased by 60%, 53%, 57%, and 57%, respectively, relative to the control. The species diversity index and seed density of germinated seeds in soil seed banks also significantly decreased with prolongation of submersion time. Seed density decreased by 93%, 83%, 76%, and 72%, respectively, after 7 months of submersion. Species composition and dominance within the soil seed bank changed over time due to submersion. In general, reverse seasonal submersion negatively impacts the germination and persistence of soil seed banks. The response of soil seed bank germination and persistence to reverse seasonal submersion became the key factor determining the heterogeneity in the spatial distribution of the soil seed bank in hydro‐fluctuation belts due to the large differences in submersion time between areas at various elevations.

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Imbibition phases and germination response of Mimosa bimucronata (Fabaceae: Mimosoideae) to water submersion

Cited by 18 publications

References 30 publications

Environmental control of seed dormancy and germination of Mimosa calodendron (Fabaceae): implications for ecological restoration of a highly threatened environment

Environmental control of seed dormancy and germination of Mimosa calodendron (Fabaceae): implications for ecological restoration of a highly threatened environment

Effects of flooding on seed viability and nutrient composition in three riparian shrubs and implications for restoration

Effects of reverse seasonal submersion on the germination and persistence of soil seed banks in hydro‐fluctuation belts

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