24 research outputs found
The effect of nature conservation on flowering of Paeonia mascula in Israel
No full textNe'eman Gidi. The effect of nature conservation on flowering of Paeonia mascula in Israel. In: Ecologia mediterranea, tome 28 n°2, 2002. p. 104
Pregermination heat shock and seedling growth of fire-following Fabaceae from four Mediterranean-climate regions
No full textThe role of heat-shock in stimulating the germination of soil-stored seeds from fire-following plant species is well known. However, the effects of high pre-germination temperatures on subsequent seedling growth are less well understood. In this study, we examined the effect of pre-germination heat shock at five temperatures (60°, 75°, 90°, 105° and 120°C, each applied for 5 min) on the seedling growth of four, fire-following Fabaceae species from four Mediterranean-type ecosystems; Hippocrepis multisiliquosa (Israel), Gastrolobium villosum (Western Australia), Cyclopia pubescens (South Africa) and Lupinus succulentus (California). Following heat treatment and subsequent germination, seedlings were grown in controlled conditions before being harvested at either 10, 20- or 40 d old. A significant increase in mean dry weight biomass was found at 10 days for Hippocrepis seedlings germinated from seeds pre-heated to 90°C. However, subsequent comparison of mean dry weight biomass for seedlings of this species at 20 and 40 d old showed no significant response to heat shock pre-treatment. Similarly, an initial increase in growth of Gastrolobium seedlings germinated from seeds heated to 90° and 105°C disappeared as the plants matured. Seedling growth of Lupinus and Cyclopia was unaffected by the pre-germination heat treatment of their seeds. Since seedling competition is influenced by the size and growth rates of neighbouring plants, any changes in seedling growth rates as a consequence of the temperature environment experienced by their seeds, may therefore influence patterns of post-fire plant community recovery
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Pollen Morphology and Its Relationship to the Taxonomy of the Genus Sarracenia (Sarraceniaceae)
No full textDespite nearly a century of research, the systematic relationships among North American pitcher plants in the genus Sarracenia (Sarraceniaceae) remain unresolved. In this study we analyzed pollen morphology of the 11 currently recognized species of Sarracenia and examined how variations in key pollen characteristics relate to our current understanding of the taxonomy of this genus. We used principal components analysis to explore variations in pollen grain size (equatorial diameter and length) and shape (number of colpi) among Sarracenia species, and used cluster analysis to compare systematic groupings of Sarracenia based on floral, vegetative, and pollen characters. We compared these results with a previously published phylogeny based on molecular data. Groupings based on pollen characteristics alone did not align completely with those based on molecular or all morphological data. In clusters based on pollen alone and those using all morphological characters, S. purpurea and S. rosea formed a single group, and S. flava, S. alata, and S. leucophylla grouped together consistently. The pollen morphology of S. jonesii and S. alabamensis differed substantially from that of S. rubra, supporting the current systematic treatment of the genus that recognizes these three taxa as distinct species.Other Research UnitAccepted Manuscrip
Gershberg et al., - all data for Dryad
No full textMicrosatellites results
Colum A – individual ID (seedling ‘group’ on left, then individual number within the group)
Colum B – The number of the burned tree (the seedling ‘group’)
Colum C+D the length (in bp) of the alleles of microsatellite A5A12
Colum E+F the length (in bp) of the alleles of microsatellite B4F08
Colum G+H the length (in bp) of the alleles of microsatellite PtTx3107
Colum I+J the length (in bp) of the alleles of microsatellite Pest2669
Colum K+L the length (in bp) of the alleles of microsatellite PtTx3116
Colum M+N the length (in bp) of the alleles of microsatellite pEST1489
Colum O+P the length (in bp) of the alleles of microsatellite PHAF2
Colum Q+R the length (in bp) of the alleles of microsatellite ITPH4516
Colum S+T the length (in bp) of the alleles of microsatellite PHAF01. -1=missing dat
