Local climate controls among-population variation in germination patterns in two<i>Erica</i>species across western Iberia

Chamorro, Daniel; Luna, Belén; Moreno, José Manuel

doi:10.1017/s0960258518000041

Cited by 20 publications

(15 citation statements)

References 58 publications

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“…may also influence seed traits and germination progress, which needs further studies. But several studies have demonstrated that temperature and precipitation are the major factors affecting seed traits, plant performance, and distribution (Chamorro et al, 2018;Ramírez-Valiente et al, 2020;Zhou et al, 2020), as reported in the present study. Furthermore, the SEM analysis in this study indicated that the seed traits affected by MAT was stronger than MAP, which in line with previous study based on a worldwide meta-analysis (Moles et al, 2014).…”

Section: Discussionsupporting

confidence: 73%

“…For example, relative to populations in low latitudes, the germination time of populations of Erica spp. in high latitudes was delayed ( Chamorro et al, 2018 ), indicating the effects of the local climate along latitudes. Such variation in germination timing could immediately and substantially affect the seedling stage, the most vulnerable period in the life cycle ( Leiblein-Wild et al, 2014 ; Ortmans et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

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Latitudinal and Longitudinal Trends of Seed Traits Indicate Adaptive Strategies of an Invasive Plant

Zhou

Yang

et al. 2021

Front. Plant Sci.

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Invasive plants may change their seed traits to adapt to the environment and facilitate their performance. Studies on variation in seed traits among populations of an invader along latitudes/longitudes may assist in revealing how invasive plants cope with variable climates. In this study, we collected seeds of 26 populations of the global invasive plant Ambrosia artemisiifolia along ranges spanning 23° latitudes and 20° longitudes that are highly correlated in its invasive range in China. We measured over 20 seed traits, including seed morphology, phytohormone, nutrients, and germination, and investigated how the climate along the latitudes affects those traits. We found that germination time was significantly delayed with increasing latitude and longitude, while the reversed patterns were true for the germination rate. From low to high latitude, seed size, abscisic acid, and fatty acid were increased, likely affecting seed germination. Our analysis further demonstrated that temperature is the dominant driver of the variability in seed traits and germination. Germination rates of larger seeds in cold ranges were lower, while smaller seeds from warm ranges germinated faster, likely indicating adaptive strategies of the invasive plant in seed trait functional ecology. Together, our findings provide new insights into understanding the seed adaptation strategies during the invasion process and the underlying physiological and biochemical mechanisms involved.

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Section: Discussionsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Latitudinal and Longitudinal Trends of Seed Traits Indicate Adaptive Strategies of an Invasive Plant

Zhou

Yang

et al. 2021

Front. Plant Sci.

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“…Avoiding germinating in frost conditions through the development of deeper dormancy mechanisms is one strategy to avoid frost (Spindelböck et al, 2013). Additionally, the germination of PD species has been shown to alter due to differences in climate between latitudinal gradients, where seeds from warmer environments are less dormant than seeds from cold environments within the same species, possibly through phenotypic plasticity (Chamorro et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

Investigation of 18 physiologically dormant Australian native species: germination response, environmental correlations and the implications for conservation

Collette

Ooi

2020

Seed Sci. Res.

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For physiologically dormant (PD) species in fire-prone environments, dormancy can be both complex due to the interaction between fire and seasonal cues, and extremely deep due to long intervals between recruitment events. Due to this complexity, there are knowledge gaps particularly surrounding the dormancy depth and cues of long-lived perennial PD species. This can be problematic for both in situ and ex situ species management. We used germination experiments that tested seasonal temperature, smoke, dark and heat for 18 PD shrub species distributed across temperate fire-prone Australia and assessed how germination was correlated with environmental factors associated with their home environments. We found extremely high levels of dormancy, with only eight species germinating above 10% and three species producing no germination at all. Seven of these eight species had quite specific seasonal temperature requirements and/or very strong responses to smoke cues. The maximum germination for each species was positively correlated with the mean temperature of the source population but negatively correlated with rainfall seasonality and driest months. The strong dependence on a smoke cue for some of the study species, along with examples from other studies, provides evidence that an obligate smoke response could be a fire-adapted germination cue. Germination response correlated with rainfall season of the source populations is a pattern which has often been assumed but little comparative data across sites with different rainfall seasonality exists. Further investigation of a broader range of species from different rainfall season environments would help to elucidate this knowledge gap.

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“…However, other works show the opposite pattern or the lack of a clear relationship between latitude and germination temperature [ 55 ]. Germination of western Iberia Erica australis and E. umbellata seeds showed that rising temperatures will affect these species, particularly at their northern ranges, where many seeds will remain dormant during warmer winters [ 69 ]. This study proved that models aiming at assessing climate change impacts in the species need to include the variability across latitudes.…”

Section: Adaptations Of Seed Germination To the Changing Environmementioning

confidence: 99%

Regulation of Seed Dormancy and Germination Mechanisms in a Changing Environment

Klupczyńska

Pawłowski

2021

IJMS

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Environmental conditions are the basis of plant reproduction and are the critical factors controlling seed dormancy and germination. Global climate change is currently affecting environmental conditions and changing the reproduction of plants from seeds. Disturbances in germination will cause disturbances in the diversity of plant communities. Models developed for climate change scenarios show that some species will face a significant decrease in suitable habitat area. Dormancy is an adaptive mechanism that affects the probability of survival of a species. The ability of seeds of many plant species to survive until dormancy recedes and meet the requirements for germination is an adaptive strategy that can act as a buffer against the negative effects of environmental heterogeneity. The influence of temperature and humidity on seed dormancy status underlines the need to understand how changing environmental conditions will affect seed germination patterns. Knowledge of these processes is important for understanding plant evolution and adaptation to changes in the habitat. The network of genes controlling seed dormancy under the influence of environmental conditions is not fully characterized. Integrating research techniques from different disciplines of biology could aid understanding of the mechanisms of the processes controlling seed germination. Transcriptomics, proteomics, epigenetics, and other fields provide researchers with new opportunities to understand the many processes of plant life. This paper focuses on presenting the adaptation mechanism of seed dormancy and germination to the various environments, with emphasis on their prospective roles in adaptation to the changing climate.

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Local climate controls among-population variation in germination patterns in twoEricaspecies across western Iberia

Cited by 20 publications

References 58 publications

Latitudinal and Longitudinal Trends of Seed Traits Indicate Adaptive Strategies of an Invasive Plant

Latitudinal and Longitudinal Trends of Seed Traits Indicate Adaptive Strategies of an Invasive Plant

Investigation of 18 physiologically dormant Australian native species: germination response, environmental correlations and the implications for conservation

Regulation of Seed Dormancy and Germination Mechanisms in a Changing Environment

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