Biología reproductiva de Helianthemum apenninum (L.) Mill. y H. caput-felis Boiss. (Cistaceae) de Mallorca (Islas Baleares, España)

Tébar, Francisco Javier; Gil, Lorenzo; Llorens, Leonardo

doi:10.24310/abm.v22i0.8607

Cited by 15 publications

(13 citation statements)

References 23 publications

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“…Although Helianthemum forms a heterogeneous and highly diverse group with a large variation in life form, flower size, number of anthers and ovules and mating systems (Arrington & Kubitzki ; Guzmán & Vargas ), largest‐flowered species share a mating system that is mainly xenogamous with high pollen production (Tébar et al . ; Rodríguez‐Pérez ). However, solid conclusions associated with mating systems in Cistaceae should be taken with caution since we lack complete data for pollinator requirements and compatibility systems in the present study.…”

Section: Discussionmentioning

confidence: 99%

Phylogeny determines flower size‐dependent sex allocation at flowering in a hermaphroditic family

et al. 2017

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In animal-pollinated hermaphroditic plants, optimal floral allocation determines relative investment into sexes, which is ultimately dependent on flower size. Larger flowers disproportionally increase maleness whereas smaller and less rewarding flowers favour female function. Although floral traits are considered strongly conserved, phylogenetic relationships in the interspecific patterns of resource allocation to floral sex remain overlooked. We investigated these patterns in Cistaceae, a hermaphroditic family. We reconstructed phylogenetic relationships among Cistaceae species and quantified phylogenetic signal for flower size, dry mass and nutrient allocation to floral structures in 23 Mediterranean species using Blomberg's K-statistic. Lastly, phylogenetically-controlled correlational and regression analyses were applied to examine flower size-based allometry in resource allocation to floral structures. Sepals received the highest dry mass allocation, followed by petals, whereas sexual structures increased nutrient allocation. Flower size and resource allocation to floral structures, except for carpels, showed a strong phylogenetic signal. Larger-flowered species allometrically allocated more resources to maleness, by increasing allocation to corollas and stamens. Our results suggest a major role of phylogeny in determining interspecific changes in flower size and subsequent floral sex allocation. This implies that flower size balances the male-female function over the evolutionary history of Cistaceae. While allometric resource investment in maleness is inherited across species diversification, allocation to the female function seems a labile trait that varies among closely related species that have diversified into different ecological niches.

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Section: Discussionmentioning

confidence: 99%

Phylogeny determines flower size‐dependent sex allocation at flowering in a hermaphroditic family

et al. 2017

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“…Most species are self-incompatible outcrossers, with big, chasmogamous, showy flowers and high pollen production. They are mainly pollinated by hymenopterous, dipterous, and coleopterous insects (Herrera 1987a(Herrera , 1987b(Herrera , 1992; Brandt and Gottsberger 1988;Bosch 1992;Talavera et al 1993Talavera et al , 1997Blasco and Mateu 1995;Tébar et al 1997;Boscaiu and Gü emes 2001;Rodríguez-Pérez 2005). In most species, at the end of flower anthesis, the corolla falls and the sepals push the anthers onto the stigma, allowing the contact between them (Martín and Guinea 1949).…”

Section: Introductionmentioning

confidence: 99%

Evidence of Delayed Selfing inFumana juniperina(Cistaceae)

Carrió

Herreros

Bacchetta

et al. 2008

International Journal of Plant Sciences

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Several aspects of the reproductive biology of Fumana juniperina were analyzed to find out whether delayed selfing occurs within a representative natural population in southwest Sardinia. Similar fruit set was obtained after autonomous, within-flower, and between-flower self-pollination (0.35, 0.53, and 0.46, respectively), crosspollination (0.45), and control (0.39). Seed set and seed mass did not differ significantly between pollination treatments (P > 0:05). Autonomous self-pollination was favored at the end of floral anthesis, when the petals fell and the sepals closed and pushed the anthers onto the stigma, making contact. No pollinators were seen visiting the flowers during the 42-h observation period, and the stigmatic pollen load on open-pollinated flowers, collected after the petals had fallen and before anther and stigma contact had occurred, was not enough to fertilize all the ovules. Low levels of inbreeding depression were found for fruit set (d ¼ À0:167), seed set (d ¼ À0:086), seed mass (d ¼ 0:008), and seed germination (d ¼ À0:052). These results support the idea that F. juniperina is selfcompatible and capable of autonomous self-pollination through changes in the position of the stigma and anthers at the end of floral anthesis. This is a case of how delayed selfing can be an efficient mating strategy that ensures reproduction in this plant when pollinators are scarce. This is the first time that a mechanism of delayed selfing has been described within the family Cistaceae.

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“…), whereas flowers in the Mallorcan populations, which have a lower pollinator diversity, have lost the incompatibility system and are capable of self‐fertilising to adapt their reproductive system to changing and unstable conditions of pollinators (Tébar et al . ; Rodríguez‐Pérez ). An alternative efficient mating strategy that ensures plant reproduction when pollinators are scarce is the ‘delayed selfing’.…”

Section: Resultsmentioning

confidence: 99%

Plant reproductive ecology and evolution in the Mediterranean islands: state of the art

Traveset

Navarro

2017

Plant Biol J

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The ca. 12,000 islands and islets that encompass the Mediterranean Basin represent a biodiversity hotspot. They have been disconnected from each other and from the continent for hundreds of thousands to millions of years and encompass a high incidence of endemic plant species, with values that can exceed 20% of the local flora. Despite this, relatively few studies have been carried out to unravel ecological and evolutionary aspects of plant reproduction. We synthesise here the available information on the breeding systems, pollination and seed dispersal mode of the Mediterranean island flora. The main objective is to identify general patterns as well as to detect the main gaps in information on reproductive ecology in these particular and vulnerable systems in the face of global change. We also briefly review the information on impacts of invasive species on plant reproduction and dispersal, as these are some of the main threats to island biodiversity in general and Mediterranean island plant diversity in particular. The review has revealed that most available information is very geographically biased towards the western Mediterranean islands, especially the Balearic Islands, although a good fraction of studies have also been carried out on the eastern islands in the Aegean archipelago. Moreover, the majority of data come from species-focused studies, mainly endemic species of restricted range, whereas only a small fraction of studies have been performed at a community level. Relatively little work has involved genetic analyses, mainly focused on assessing the genetic differentiation and variability on narrow endemics. Contrary to our expectations, most island species do not rely on autonomous selfing, which might be related to the relatively high diversity of pollinators. The small, uninhabited, islands might be the last refuges of peculiar interactions that evolved in them in ancient times; they thus should be considered as sanctuaries of extraordinary biodiversity. Finally, we point out the main gaps of information and formulate a set of hypotheses that we believe are worth testing in future studies if we are to advance knowledge on the reproductive biology of Mediterranean island plants.

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Biología reproductiva de Helianthemum apenninum (L.) Mill. y H. caput-felis Boiss. (Cistaceae) de Mallorca (Islas Baleares, España)

Cited by 15 publications

References 23 publications

Phylogeny determines flower size‐dependent sex allocation at flowering in a hermaphroditic family

Phylogeny determines flower size‐dependent sex allocation at flowering in a hermaphroditic family

Evidence of Delayed Selfing inFumana juniperina(Cistaceae)

Plant reproductive ecology and evolution in the Mediterranean islands: state of the art

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