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271 results for “dormancy”
Figure 1 in A unique seasonal cycle in a leaf gall-inducing insect: the formation of stem galls for dormancy
Figure 1. Schematic representation of Pseudotectococcus rollinae annual life cycle on Rollinia laurifolia plants. Numbers from two to four represent nymphal instars.
Seed dormancy and germination traits of 27 species inhabiting the degraded karst mountain from central Yunnan-Guizhou Plateau: Seed mass and moisture content correlates with germination capacity
<p>Seed dormancy and germination play an important roles in regulating germination timing and plant fitness in harsh environment, especially for fragile karst region. Broadening the knowledge regarding seed ecology of native plant species can improve local restoration management due to the increased biodiversity and success of seedling establishment, yet few studies have addressed this. We examined the dormancy types and germination responses to temperature regimes as well as light conditions of totally 27 that were dominant or common species inhabiting a degraded karst mountain from central Yunnan-Guizhou Plateau and assessed the relationships between seed traits and germination index using a partial least squares regression (PLSR). Approximately 48% of the investigated species exhibited physiological dormancy, 37% exhibited nondormancy, 7% exhibited morphophysiological dormancy, 4% exhibited morphological dormancy and 4% exhibited physical dormancy. Germination behaviors occurred in 16 of 27 species. The seed germination of 13 species strongly responded to seasonal temperature regimes, whereas 12 species were substantially affected by light conditions. About 94% species germinated to the maximum percent in warm temperature regimes (20/13 and 25/18 °C), while the remaining was in cool temperature regime (10/4 °C). The PLSR analysis indicated a significant positive correlation between seed mass and T50 m (time to 50% final germination), and a negative correlation between seed moisture content and percent germination, showing that small seeds, particularly those with a low moisture content, were more likely to have a greater germination capacity (including relative less germination time and higher germination percent) than large seeds in harsh karst environments. In general, these results strengthen the understanding of seed dormancy classification of dormant species and germination requirements of nondormant ones that representative of pioneer species of early stage of positive succession in seriously degraded sites and provide suggestion for species selection in local seed-based vegetation restoration.</p>
Seed dormancy varies widely among Arabidopsis thaliana populations both between and within Fennoscandia and Italy
<p>The timing of germination is a key life-history trait in plants, which is strongly affected by the strength of seed dormancy. Continental-wide genetic variation in seed dormancy has been related to differences in climate and the timing of conditions suitable for seedling establishment. However, for predictions of adaptive potential and consequences of climatic change, information is needed regarding the extent to which seed dormancy varies within climatic regions and the factors driving such variation. We quantified dormancy of seeds produced by 17 Italian and 28 Fennoscandian populations of <em>Arabidopsis thaliana</em> when grown in the greenhouse and at two field sites in Italy and Sweden. To identify possible drivers of among-population variation in seed dormancy, we examined the relationship between seed dormancy and climate at the site of population origin, and between seed dormancy and flowering time. Seed dormancy was on average stronger in the Italian compared to the Fennoscandian populations, but also varied widely within both regions. Estimates of seed dormancy in the three maternal environments were positively correlated. Among Fennoscandian populations, seed dormancy tended to increase with increasing summer temperature and decreasing precipitation at the site of population origin. In the smaller sample of Italian populations, no significant association was detected between mean seed dormancy and climate at the site of origin. The correlation between population mean seed dormancy and flowering time was weak and not statistically significant within regions. The correlation between seed dormancy and climatic factors in Fennoscandia suggests that at least some of the among-population variation is adaptive and that climate change will affect selection on this trait. The weak correlation between population mean seed dormancy and flowering time indicates that the two traits can evolve independently.</p>
Seed dormancy varies widely among Arabidopsis thaliana populations both between and within Fennoscandia and Italy
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Data from: Ex situ cultivation entails high risk of seed dormancy loss on short-lived wild plant species
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Data from: Genetic basis of adaptation in Arabidopsis thaliana: local adaptation at the seed dormancy QTL DOG1
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Effects of temperature on seed dormancy and germination of the coastal dune plant Viola grayi: Germination phenology and responses to winter warming
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Seed dormancy and germination traits of 27 species inhabiting the degraded karst mountain from central Yunnan-Guizhou Plateau: Seed mass and moisture content correlates with germination capacity
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Data from: Persistence of a Wolbachia infection frequency cline in Drosophila melanogaster and the possible role of reproductive dormancy
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Data from: Pre-dispersal seed predators and fungi differ in their effect on Luehea seemannii capsule development, seed germination and dormancy across two Panamanian forests
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Data from: Polymorphism in the couch potato gene clines in eastern Australia but is not associated with ovarian dormancy in Drosophila melanogaster
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Data from: Drivers of vegetative dormancy across herbaceous perennial plant species
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Data from: The bear circadian clock doesn't 'sleep' during winter dormancy
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Data from: Are dormant plants hedging their bets? Demographic consequences of prolonged dormancy in variable environments
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Data from: Seed dormancy explains plant response to mass mortality events
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Data from: Changing climate cues differentially alter zooplankton dormancy dynamics across latitudes
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SNP alleles for pooled DNA samples of Vicia villosa targeting QTL for pod dehiscence and seed dormancy
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Induction and potential role of summer dormancy to enhance persistence of perennial grasses under warmer climates
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Seed size and capitulum position drive germination and dormancy responses to projected warming for the threatened dune endemic Cirsium pitcheri (Asteraceae)
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Canalization of seasonal phenology in the presence of developmental variation: seed dormancy cycling in an annual weed
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