The seed germination spectrum of 486 plant species: A global meta-regression and phylogenetic pattern in relation to temperature and water potential

Maleki, Keyvan; Soltani, Elias; Seal, Charlotte E.; Colville, Louise; Pritchard, Hugh W.; Lamichhane, Jay Ram

doi:10.1016/j.agrformet.2023.109865

Cited by 8 publications

(4 citation statements)

References 78 publications

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“…These results agree with those of other wild and ornamental species from arid zones, proving that temperature is not a limiting factor for germination but rather water availability [39][40][41]. The ability to germinate in a wide range of temperatures is important for plants with potential ornamental use because it allows germination and seedling establishment at any time of the year, as long as water is available [42] and helps them succeed in environments with fluctuating temperatures [43]. The capacity to germinate at low temperatures was also demonstrated in Hypericum ericoides, a wild plant with ornamental potential growing in Mediterranean areas.…”

Section: Discussionsupporting

confidence: 85%

“…The species with the lowest Tb, P. purpurea, is the most sensitive to an increase in temperature due to global warming. As evidenced for other species, an inverse correlation between Tb and thermal time means that adaptation to a higher Tb corresponds to lower thermal time and more efficient germination [43]. As these authors highlighted when comparing different groups of species, the lowest thermal times were recorded for ornamental and other species living in harsh habitats.…”

Section: Discussionmentioning

confidence: 74%

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Comparison of the Climate Change Tolerance of Native and Non-Native Species Used or Potentially Used as Ornamentals in Mediterranean Areas

Soriano,

Mora,

Estrelles

et al. 2024

Horticulturae

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As a consequence of climate change, temperature and rainfall regimes are being modified, threatening the survival of the current gardening concept in many areas of the world. This situation highlights the need to investigate the potential of other species, especially in more sensitive areas such as the Mediterranean Basin. The aim of this research is to study the resilience of adapted species to promote sustainable gardening. To achieve this, seven species belonging to three families (Amaranthaceae, Lamiaceae and Asteraceae) used or potentially used as ornamentals were selected to compare their tolerance at the germinative stage to different levels of temperature (10 °C to 35 °C) and water stress created by PEG 6000 (−0.10 MPa to −2.5 MPa). Germination percentage, mean germination time, base temperature, thermal time, base water potential and hydrotime were calculated. The results showed a good response to high temperature and low osmotic potential in most of the species, and germination even increased under certain stress levels. Salsola oppositifolia presented by far the best results in terms of germination under high-water-stress conditions and the second best at high temperatures. The extraordinary response of Celosia argentea, an alien species, highlighted the risk of it becoming an invasive species.

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Section: Discussionsupporting

confidence: 85%

Section: Discussionmentioning

confidence: 74%

Comparison of the Climate Change Tolerance of Native and Non-Native Species Used or Potentially Used as Ornamentals in Mediterranean Areas

Soriano,

Mora,

Estrelles

et al. 2024

Horticulturae

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“…Seed germination is a crucial step in the life cycle of plants. Much attention has been given to studies examining various species that are different in germination strategies in response to environmental filters (Gremer et al, 2020a,b; Maleki et al, 2024). Our results suggest that germination and post-germination traits are affected by the seed mass gradient, but also that this relationship is complex and highly dependent on growth form.…”

Section: Discussionmentioning

confidence: 99%

“…Climate-related uncertainty has been a motivating factor for ecologists to focus on the understanding of functional traits and their interaction with life history transitions, which are important determinants of plant persistence in varying environments (Buckley & Kingsolver, 2012; De Frenne et al, 2013; Gremer et al, 2020a; Maleki et al, 2024). Seed dormancy is a strategy ensuring plant survival in an unpredictable environment, by delaying germination until conditions are suitable for seedling establishment and survival or by spreading germination in time (Pausas et al, 2022; Zhang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Global patterns in the evolutionary relations between seed mass and germination traits

Maleki,

Vandelook,

Saatkamp

et al. 2024

Preprint

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During stressful climatic periods, plant populations face significant challenges, especially during germination and seedling establishment. Theoretical studies present conflicting findings regarding the relationship between seed size and germination rate. Some analyses suggest that species with larger seeds should exhibit rapid germination, while others point to faster germination in smaller seeds. This discrepancy can, for example, be attributed to the higher vulnerability of larger seeds to post-dispersal seed predation. To assess the correlation between seed mass and seed germination characteristics at a global scale, we performed a rigorous meta-analysis of published data sources, covering a wide range of germination traits across 1877 species with diverse dormancy types and global distribution. Additionally, we investigated the potential relationship between seed mass and dormancy level. Our findings revealed contrasting responses of germination traits to seed mass, suggesting complex eco-evolutionary correlations among these traits. Trade-offs and corelated evolution likely played an important role in the evolutionary history of seed mass, with seed mass displaying notable trait conservation across the phylogeny. Interestingly, our study demonstrated that seed dormancy exhibited trade-offs with post-germination traits and seed mass. The meta-analysis demonstrated that any changes in the relationship between seed mass and dormancy is dependent on dormancy types with physiological dormancy showing lower seed mass while other dormancy types were has a higher seed mass. These results underscore the critical role of seed mass in shaping plant performance and provide valuable insights into plant trait evolution. Our findings clearly indicate that the hypothesis of larger seeds conferring advantages in both pre- and post-germination traits might not be empirically true in all cases as theoretical studies suggest and that this relationship is complex and varies among species and growth forms. We interpret these results within the context of germination strategies and correlated evolution between seed dormancy and seed mass. Considering these traits in future analyses of plant germination strategies and species distributions is crucial. Factors such as lifespan, seed mass, and germination-related traits should be carefully considered to gain a comprehensive understanding of plant adaptation to challenging environmental conditions.

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Does shifting from normal to early or late sowing dates provide yield benefits? A global meta-analysis

Dadrasi,

Soltani,

Makowski

et al. 2024

Field Crops Research

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The seed germination spectrum of 486 plant species: A global meta-regression and phylogenetic pattern in relation to temperature and water potential

Cited by 8 publications

References 78 publications

Comparison of the Climate Change Tolerance of Native and Non-Native Species Used or Potentially Used as Ornamentals in Mediterranean Areas

Comparison of the Climate Change Tolerance of Native and Non-Native Species Used or Potentially Used as Ornamentals in Mediterranean Areas

Global patterns in the evolutionary relations between seed mass and germination traits

Does shifting from normal to early or late sowing dates provide yield benefits? A global meta-analysis

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