Characteristics and methods to release seed dormancy of two ground cherry (Physalis) species

Farooq, Shahid; Önen, Hüseyin; Özaslan, Cumali; El-Shehawi, Ahmed M.; Elseehy, Mona M.

doi:10.1016/j.jarmap.2021.100337

Cited by 8 publications

(8 citation statements)

References 48 publications

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“…While this treatment does not clearly address any mechanism of dormancy break in the field, it did result in differentiation among the three seed populations. This means that a laboratory or field experiment with a single seed population is not generalizable across the species, which is consistent with findings from other species (Farooq et al, 2021 ; Meyer et al, 1995 ). Whether these differences are the result of selection on genetic variation or are maternal effects due to differences in seed ripening conditions is not known.…”

Section: Discussionsupporting

confidence: 81%

Long‐term seed bank persistence in a stochastic desert environment

Queiroz

Meyer

2023

Ecology and Evolution

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Seed banks, the collection of viable seeds in the soil, are particularly important determinants of population survival in highly variable environments. Predictions of increased stochasticity in the amount and timing of precipitation in desert environments raise the question of how seed banks of desert species will respond to climate change, and ultimately, whether these species will persist. Here, we present data from our long-term studies of germination requirements and seed bank dynamics in a rare desert gypsophile perennial, Arctomecon californica (Las Vegas bearpoppy). Arctomecon californica is a relatively short-lived plant that recruits from seed in sequences of unusually favorable years. We used germination experiments, an in situ seed bank study, and a 15-year field seed retrieval study to examine factors affecting seed bank persistence. In the germination study, a majority of seeds remained dormant, despite a wide variety of treatments, suggesting that a large proportion of the seed dispersed each year has cue-nonresponsive dormancy. Our in situ seed bank study showed that seed density varied widely between sites, among transects, and among samples within a transect. The patchiness of seeds in the soil highlights the importance of protecting large areas where A. californica populations are known to have existed in the past. The seed retrieval study provided strong evidence that this species has a long-lived seed bank in which only a small fraction of seeds (roughly 5%) become nondormant each year, allowing seed banks of this species to last up to 20 years without a seed production event. Whether this impressive life-history strategy can maintain the species in the face of climate change depends on the future frequency of the well-timed precipitation that allows for the establishment of new cohorts of adult plants.

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Section: Discussionsupporting

confidence: 81%

Long‐term seed bank persistence in a stochastic desert environment

Queiroz

Meyer

2023

Ecology and Evolution

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“…As an adaptive trait, deep seed dormancy appears to promote plant survival in high‐elevation habitats (Baskin & Baskin, 2014 ). Consistently, S. longifolia populations contain higher proportions of dormant seeds at high elevations (Cotado et al, 2020 ), Physalis species show an increase in dormant seeds with increasing elevation (Farooq et al, 2021 ), and C. halicacabum seeds show more complex seed dormancy at high elevations than at low elevations (Thusithana et al, 2021 ). These results suggest that natural selection pressure should favor plants that produce more dormant mature seeds at higher elevations.…”

Section: Discussionmentioning

confidence: 91%

“…sylvestris ) are threatened by climate warming due to compromised seed dormancy release (Orrù et al, 2012 ). Furthermore, a positive relationship exists between the number of dormant seeds and elevation in Physalis (Solanaceae) species (Farooq et al, 2021 ). While previous studies have reported on variation in SDS with elevation at the intra‐ or interspecific level, climatic factors, such as temperature and precipitation, are also likely to play important roles in modulating SDS variation with elevation.…”

Section: Introductionmentioning

confidence: 99%

Elevation and phylogeny shape herbaceous seed dormancy in a biodiversity hotspot of southwest China

Chen

Huang

et al. 2023

Ecology and Evolution

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Seed dormancy contributes greatly to successful establishment and community stability and shows large variation over a continuous status scale in mountain ecosystems. Although empirical studies have shown that seed dormancy status (SDS) is shaped by elevation and phylogenetic history in mountain ecosystems, few studies have quantified their combined effects on SDS. Here, we collected mature seeds from 51 populations of 11 Impatiens species (Balsaminaceae) along an elevational gradient in the Gaoligong Mountains of southwest China and estimated SDS using mean dormancy percentage of fresh seeds germinated at three constant temperatures (15, 20, and 25°C). We downloaded 19 bioclimatic variables from WorldClim v.2.1 for each Impatiens population and used internal transcribed spacer (ITS), atpB‐rbcL, and trnL‐F molecular sequences from the GenBank nucleotide database to construct a phylogenetic tree of the 11 species of Impatiens. Logistic regression model analysis was performed to quantify the effects of phylogeny and environment on SDS. Results identified a significant phylogenetic SDS signal in the Impatiens species. Furthermore, elevation and phylogeny accounted for 63.629% of the total variation in SDS among the Impatiens populations. The best logistic model indicated that temperature was the main factor influencing variation in SDS among the Impatiens species, and model residuals were significantly correlated with phylogeny, but not with elevation. Our results indicated that seed dormancy is phylogenetically conserved, and climate drives elevational patterns of SDS variation in mountain ecosystems. This study provides new insights into the response of seed plant diversity to climate change.

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“…The maximum germination values were obtained near an osmotic potential of 0 MPa. Farook et al [22] observed that Physalis species exhibit physiological dormancy, which can be released by soaking the seeds in water. This phenomenon may have contributed to the findings of the present study.…”

Section: Experiments Ii: Germination and Vigor Of Seeds Under Differe...mentioning

confidence: 99%

“…The authors also observed that dormancy was interrupted by temperature variations, explaining the high rate of germinated seeds in the field in their study. Farook et al [22] evaluated several Physalis species and found that they exhibit physiological dormancy (PD), which can be released by keeping the seeds in the presence of water. Additionally, gibberellic acid (GA3) can also be used to stimulate the germination of Physalis species seeds.…”

Section: Introductionmentioning

confidence: 99%

Germination Performance of Physalis peruviana L. Seeds under Thermal and Water Stress Conditions

de Freitas,

Gomes,

da Silva

et al. 2024

Agronomy

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Physalis peruviana holds significant economic value, making it crucial to determine optimal cultivation conditions, particularly concerning seed germination under varying water and temperature conditions. Therefore, this study aimed to assess the impacts of heat and water stress on the germination and vigor of P. peruviana seeds. The study was divided into two trials: the first examined the effect of constant temperatures of 10, 15, 20, 25, 30, 35, and 40 °C and alternating temperatures of 20 °C during the dark period and 30 °C during the light period (control) on seed germination and vigor. The second trial investigated germination and vigor under different water and thermal conditions using various osmotic potentials (0; −0.3; −0.6; and −0.9 MPa) and two temperatures (constant 30 °C and alternating 20 °C during the dark period and 30 °C during the light period). Both trials used a 16 h photoperiod. The germination tests revealed optimal (30 °C), moderate (20/30 °C), minimal (20 °C), and inhibited (40 °C) temperatures for the species’ germination. It was found that the first germination count could be conducted on the seventh day after sowing. Low water availability had negative effects on seed germination and vigor, especially at osmotic potentials below −0.45 and −0.61 MPa, combined with temperatures of 30 and 20/30 °C, respectively. Severe water stress, with osmotic potentials equal to or below −0.9 MPa, completely inhibited seed germination and vigor. Reduction in water potential and increased temperature resulted in a significant decrease in the percentage, speed, and quality of P. peruviana germination. These findings indicate that the species does not tolerate extreme temperatures, whether low (less than 15 °C) or high (greater than 35 °C), nor water stress with osmotic potentials lower than −0.45 MPa, much less the combination of these factors.

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Characteristics and methods to release seed dormancy of two ground cherry (Physalis) species

Cited by 8 publications

References 48 publications

Long‐term seed bank persistence in a stochastic desert environment

Long‐term seed bank persistence in a stochastic desert environment

Elevation and phylogeny shape herbaceous seed dormancy in a biodiversity hotspot of southwest China

Germination Performance of Physalis peruviana L. Seeds under Thermal and Water Stress Conditions

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