Seed mass and population characteristics interact to determine performance of Scorzonera hispanica under common garden conditions

Münzbergová, Zuzana; Plačková, Ivana

doi:10.1016/j.flora.2010.04.001

Cited by 32 publications

(17 citation statements)

References 59 publications

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“…In the first 2 years, the germination capacity of the SS material was, in general, higher than that of the OST material. This is in contrast to the findings of Eriksson (), Münzbergová and Plačková () and Lönnberg and Eriksson () who report that larger‐seeded species have a better germination capacity than smaller‐seeded species. Our results may be explained by the fact that the seed‐stripping technique favours the harvesting of small‐sized mature grass seeds with high germination capacity.…”

Section: Discussioncontrasting

confidence: 99%

Influence of different storage conditions on quality characteristics of seed material from semi‐natural grassland

Haslgrübler

Krautzer

Blaschka

et al. 2014

Grass and Forage Science

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Neither methodology nor guidelines are available for defining quality characteristics and storage conditions of seed material harvested from semi-natural grassland. Seeds from an Arrhenatherion meadow were harvested via on-site threshing and seed stripping. After determination of purity, thousand seed weight and pre-tests in a phytotron, germination-capacity trials were carried out in a greenhouse. The harvested seed material was stored for up to 3 years under different conditions: (i) room temperature 18-23°C, (ii) cooling chamber (2-5°C with 40-50% humidity) and (iii) freezer (À18°C). There was a significant impact of the tested harvesting methods on seed separation, thousand seed weight and purity, but not on the germination capacity. Different storage conditions and storage length significantly influenced the germination capacity. There were also generally higher germination values for the seed-stripping material than the on-site threshing material (ca. 70 and 60%, respectively, in the first year). Germination capacity decreased significantly with time and was <15% after 3 years. We conclude that harvested seed material from semi-natural grassland should preferably be stored under cool conditions and used within 2 years.

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Section: Discussioncontrasting

confidence: 99%

Influence of different storage conditions on quality characteristics of seed material from semi‐natural grassland

Haslgrübler

Krautzer

Blaschka

et al. 2014

Grass and Forage Science

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show abstract

“…This result excludes the influence of weather conditions on mother plants and, consequently, on seed germination and seedling size. A similar population effect on correlations between seed quality and germination success was also found in Scorzonera hispanica by Münzbergová and Plačková (2010).…”

Section: Discussionsupporting

confidence: 73%

Effect of mother plant age on germination and size of seeds and seedlings in the perennial sedge Carex secalina (Cyperaceae)

Lembicz

Olejniczak

Zukowski

et al. 2011

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…While many species of the Asteraceae may be autogamous or even apomictic, previous experiments with the studied species indicate no developed seeds arise without pollen transfer. The plant can thus be classified as self‐compatible but not capable of spontaneous selfing, so a pollinator is needed in all cases (Banga ; Munzbergova & Plackova ).…”

Section: Methodsmentioning

confidence: 99%

“…Scorzonera hispanica in our study area of fragmented dry grasslands typically has a high proportion of aborted seeds. Previous studies in the system demonstrated that the populations are highly genetically variable and that the high proportion of aborted seeds is thus probably not a consequence of inbreeding (Munzbergova & Plackova ). These facts raise the question of whether undeveloped seeds within flowerheads are caused through pollen limitation or a lack of resources.…”

Section: Introductionmentioning

confidence: 99%

Pollen limitation and pollinator preferences in Scorzonera hispanica

Červenková

Münzbergová

2014

Plant Biol J

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The plant life cycle is often affected by animal-plant interactions. In insect-pollinated plants, interaction with pollinators is very important. When pollen transfer due to a lower abundance of pollinators limits seed production, selection pressures on plant traits related to plant attraction to pollinators might occur, e.g. on flowering phenology, height or number of flowerheads. Landscape changes (e.g. habitat fragmentation or changed habitat conditions) may cause plant-pollinator systems to lose balance and consequently affect population dynamics of many plant species. We studied the relationship between measured plant traits, environmental variables and pollinator preferences in Scorzonera hispanica (Asteraceae), a rare perennial, allogamous herb of open grasslands. We estimated the pollen limitation by comparing seed set of supplemental-pollinated plants with that of open-pollinated ones. Pollinators selected plants based on position within the locality (isolated plants close to trees) rather than on their traits. In spite of a high proportion of undeveloped seeds on the plants, we demonstrated that they are not pollen limited. Instead, seed set and weight of seeds was correlated with plant size traits (height and flowerhead number), with larger plants producing more and larger seeds. This suggests that the studied plants are likely resource limited. Overall, the results suggest that pollinators are not a selection factor in this system, in contrast to studies on various plant species, including self-compatible species of the Asteraceae. The lack of any effect of pollinators in the system may be caused by a strong negative effect of ungulate herbivores, which could play a decisive role in functioning of the system.

show abstract

Seed mass and population characteristics interact to determine performance of Scorzonera hispanica under common garden conditions

Cited by 32 publications

References 59 publications

Influence of different storage conditions on quality characteristics of seed material from semi‐natural grassland

Influence of different storage conditions on quality characteristics of seed material from semi‐natural grassland

Effect of mother plant age on germination and size of seeds and seedlings in the perennial sedge Carex secalina (Cyperaceae)

Pollen limitation and pollinator preferences in Scorzonera hispanica

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