Abstract:
BACKGROUND AND AIMS:Archipelagos are unique systems for studying evolutionary processes promoting diversification and speciation. The islands of the Mediterranean basin are major areas of plant richness, including a high proportion of narrow endemics. Many endemic plants are currently found in rocky habitats, showing varying patterns of habitat occupancy at different spatial scales throughout their range. The aim of the present study was to understand the impact of varying patterns of population distribution on genetic diversity and structure to shed light on demographic and evolutionary processes leading to population diversification in Crepis triasii, an endemic plant from the eastern Balearic Islands. METHODS:Using allozyme and chloroplast markers, we related patterns of genetic structure and diversity to those of habitat occupancy at a regional (between islands and among populations within islands) and landscape (population size and connectivity) scale. KEY RESULTS:Genetic diversity was highly structured both at the regional and at the landscape level, and was positively correlated with population connectivity in the landscape. Populations located in small isolated mountains and coastal areas, with restricted patterns of regional occupancy, were genetically less diverse and much more differentiated. In addition, more isolated populations had stronger fine-scale genetic structure than well-connected ones. Changes in habitat availability and quality arising from marine transgressions during the Quaternary, as well as progressive fragmentation associated with the aridification of the climate since the last glaciation, are the most plausible factors leading to the observed patterns of genetic diversity and structure. CONCLUSIONS:Our results emphasize the importance of gene flow in preventing genetic erosion and maintaining the evolutionary potential of populations. They also agree with recent studies highlighting the importance of restricted gene flow and genetic drift as drivers of plant evolution in Mediterranean continental islands.
journal_name
Ann Botjournal_title
Annals of botanyauthors
Mayol M,Palau C,Rosselló JA,González-Martínez SC,Molins A,Riba Mdoi
10.1093/aob/mcr298subject
Has Abstractpub_date
2012-02-01 00:00:00pages
429-41issue
2eissn
0305-7364issn
1095-8290pii
mcr298journal_volume
109pub_type
杂志文章相关文献
ANNALS OF BOTANY文献大全abstract:BACKGROUND:Photosystem II (PSII) is the light-driven water:plastoquinone oxidoreductase of oxygenic photosynthesis and is found in the thylakoid membrane of chloroplasts and cyanobacteria. Considerable attention is focused on how PSII is assembled in vivo and how it is repaired following irreversible damage by visible ...
journal_title:Annals of botany
pub_type: 杂志文章,评审
doi:10.1093/aob/mcq059
更新日期:2010-07-01 00:00:00
abstract:BACKGROUND AND AIMS:Although numerous angraecoid orchids in Madagascar display typical sphingophilous syndrome (i.e. white, nectariferous, long-spurred flowers, producing a strong scent at the crepuscule that is attractive to moths), three species of Angraecum in Reunion, belonging to the endemic section Hadrangis, hav...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcl056
更新日期:2006-06-01 00:00:00
abstract:BACKGROUND:Many plant species can modify their root architecture to enable them to forage for heterogeneously distributed nutrients in the soil. The foraging response normally involves increased proliferation of lateral roots within nutrient-rich soil patches, but much remains to be understood about the signalling mech...
journal_title:Annals of botany
pub_type: 杂志文章,评审
doi:10.1093/aob/mcj601
更新日期:2006-05-01 00:00:00
abstract:BACKGROUND AND AIMS:Bromus tectorum (cheatgrass or downy brome) is an exotic annual grass that is dominant over large areas of former shrubland in western North America. To flower in time for seed production in early summer, B. tectorum plants generally require vernalization at winter temperatures, either as imbibed se...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mch088
更新日期:2004-06-01 00:00:00
abstract:BACKGROUND AND AIMS:Serpentine soils are characterized by the presence of heavy metals (Ni and Cr) and excess Mg; these elements often suppress plant growth. Picea glehnii is nevertheless distributed widely on serpentine soils in northern Japan. Growth characteristics were compared among P. glehnii, Picea jezoensis (di...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mci063
更新日期:2005-03-01 00:00:00
abstract:BACKGROUND AND AIMS:The mode of reproduction (sexual vs. asexual) is likely to have important effects on genetic variation and its spatial distribution within plant populations. An investigation was undertaken of fine-scale clonal structure and diversity within patches of Ilex leucoclada (a clone-forming dioecious shru...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mci025
更新日期:2005-01-01 00:00:00
abstract:BACKGROUND AND AIMS:Seagrasses are marine, flowering plants with a hydrophilous pollination strategy. In these plants, successful mating requires dispersal of filamentous pollen grains through the water column to receptive stigmas. Approximately 40 % of seagrass species are monoecious, and therefore little pollen movem...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcu048
更新日期:2014-06-01 00:00:00
abstract:BACKGROUND AND AIMS:The pericarp weight comprises <17 % of wheat grain weight at harvest. The pericarp supports the hydration and nutrition of both the embryo and endosperm during early grain filling. However, studies of the pericarp and its association with final grain weight have been scarce. This research studied th...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcaa131
更新日期:2020-10-30 00:00:00
abstract:BACKGROUND AND AIMS:Hymenaea stigonocarpa (Fabaceae: Caesalpinioideae) is an endemic tree from the Brazilian cerrado (savanna vegetation), a biome classified as a hotspot for conservation priority. This study investigates the phylogeographic structure of H. stigonocarpa, in order to understand the processes that have l...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcm221
更新日期:2007-12-01 00:00:00
abstract:BACKGROUND AND AIMS:The thermoregulatory flower of the Asian sacred lotus (Nelumbo nucifera) can maintain a relatively stable temperature despite great variations in ambient temperature during anthesis. The thermoregulation has been hypothesized to offer a direct energy reward for pollinators in lotus flowers. This stu...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcp051
更新日期:2009-05-01 00:00:00
abstract:BACKGROUND AND AIMS:Leaf area of cotton seedlings (Gossypium hirsutum) can be reduced by as much as 50 % by early season thrips infestations, but it is well documented that plants can regain the difference in leaf area once infestation ceases. The processes involved in the recovery have not been identified. Hypotheses ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mch125
更新日期:2004-07-01 00:00:00
abstract:BACKGROUND AND AIMS:Several biogeographic models have been proposed to explain the colonization and diversification patterns of Macaronesian lineages. In this study, we calculated the diversification rates and explored what model better explains the current distribution of the 15 endemic species to the Canary Islands b...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcaa090
更新日期:2020-05-09 00:00:00
abstract:BACKGROUND AND AIMS:Apomictic plants maintain functional pollen, and via pollination the genetic factors controlling apomixis can be potentially transferred to congeneric sexual populations. In contrast, the sexual individuals do not fertilize apomictic plants which produce seeds without fertilization of the egg cells....
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcp093
更新日期:2009-07-01 00:00:00
abstract:BACKGROUND AND AIMS:Although high light (HL) and high temperature (HT) stresses have been extensively investigated, a global analysis of their combined effects on the transcriptome of any plant species has not yet been described. Sunflower is an agronomically important oil crop frequently subjected to these stress fact...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcn071
更新日期:2008-07-01 00:00:00
abstract:BACKGROUND AND AIMS:Recent studies of reproductive biology in ancient angiosperm lineages are beginning to shed light on the early evolution of flowering plants, but comparative studies are restricted by fragmented and meagre species representation in these angiosperm clades. In the present study, the progamic phase, f...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcp276
更新日期:2010-02-01 00:00:00
abstract:Background and Aims:Predicting both plant water status and leaf gas exchange under various environmental conditions is essential for anticipating the effects of climate change on plant growth and productivity. This study developed a functional-structural grapevine model which combines a mechanistic understanding of sto...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcx141
更新日期:2018-04-18 00:00:00
abstract::Columella cells of seedlings of Zea mays L. cv. Bear Hybrid grown in the microgravity of orbital flight allocate significantly larger relative-volumes to hyaloplasm and lipid bodies, and significantly smaller relative-volumes to dictyosomes, plastids, and starch than do columella cells of seedlings grown at 1 g. The...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/oxfordjournals.aob.a087926
更新日期:1990-01-01 00:00:00
abstract::To investigate crown development patterns, branch architecture, branch-level light interception, and leaf and branch dynamics were studied in saplings of a plagiotropically branching tree species, Polyalthia jenkinsii Hk. f. & Thoms. (Annonaceae) in a Malaysian rain forest. Lengths of branches and parts of the branche...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcg008
更新日期:2003-01-01 00:00:00
abstract:BACKGROUND AND AIMS:Many previous studies conclude that pre-zygotic barriers such as mechanical isolation account for most reproductive isolation between pairs of taxa. However, the inheritance and persistence of barriers such as these after the first generation of hybridization is rarely quantified, even though it is ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcw115
更新日期:2016-09-01 00:00:00
abstract:BACKGROUND AND AIMS:Reconstructions have identified the 20th century as being uniquely warm in the last 1000 years. Changes in the phenology of primary meristems converged toward increases in length of the growing season. Has the phenology of secondary meristem changed during the last century, and to what extent? METH...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcs175
更新日期:2012-11-01 00:00:00
abstract:Background and Aims:How functional traits vary with environmental conditions is of fundamental importance in trait-based community ecology. However, how intraspecific variability in functional traits is connected to species distribution is not well understood. This study investigated inter- and intraspecific variation ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcx222
更新日期:2018-05-11 00:00:00
abstract:BACKGROUND AND AIMS:The tam (tardy asynchronous meiosis) mutant of Arabidopsis thaliana, which exhibits a modified cytokinesis with a switch from simultaneous to successive cytokinesis, was used to perform a direct test of the implication of cytokinesis in aperture-pattern ontogeny of angiosperm pollen grains. The aper...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcr074
更新日期:2011-06-01 00:00:00
abstract:BACKGROUND AND AIMS:Tea (Camellia sinensis) is considered to be acid tolerant and prefers ammonium nutrition, but the interaction between root zone acidity and N form is not properly understood. The present study was performed to characterize their interaction with respect to growth and mineral nutrition. METHODS:Tea ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcl258
更新日期:2007-02-01 00:00:00
abstract:BACKGROUND AND AIMS:The evolution of interspecific reproductive barriers is crucial to understanding species evolution. This study examines the contribution of transitions between self-compatibility (SC) and self-incompatibility (SI) and genetic divergence in the evolution of reproductive barriers in Dendrobium, one of...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcv057
更新日期:2015-09-01 00:00:00
abstract::The 'Oxalis tuberosa alliance' is a group of Andean Oxalis species allied to the Andean tuber crop O. tuberosa Molina (Oxalidaceae), commonly known as 'oca'. As part of a larger project studying the origins of polyploidy and domestication of cultivated oca, flow cytometry was used to survey DNA ploidy levels among Bol...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcf135
更新日期:2002-06-01 00:00:00
abstract:BACKGROUND AND AIMS:The leaf rosettes of the carnivorous Pinguicula moranensis follow a spiral phyllotaxis approaching a Fibonacci pattern while the stalked flowers arise from extra-axillary sites between the leaves. The organization of this rosette has been discussed by various authors, with various results. The aim o...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcm184
更新日期:2007-10-01 00:00:00
abstract:BACKGROUND AND AIMS:The broomrapes, Orobanche sensu lato (Orobanchaceae), are common root parasites found across Eurasia, Africa and the Americas. All species native to the western hemisphere, recognized as Orobanche sections Gymnocaulis and Nothaphyllon, form a clade that has a centre of diversity in western North Ame...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcw158
更新日期:2016-11-01 00:00:00
abstract:BACKGROUND AND AIMS:Although it was generally assumed that Maxillaria spp. do not produce nectar, in recent years, nectar has been reported for a number of these orchids. Nevertheless, our current understanding of nectary structure and nectar secretion in Maxillaria is based solely on M. coccinea (Jacq.) L.O. Williams ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mci182
更新日期:2005-08-01 00:00:00
abstract:BACKGROUND AND AIMS:Pollinator-limited seed-set in some terrestrial orchids is compensated for by the presence of long-lived flowers. This study tests the hypothesis that pollen from these insect-pollinated orchids should be desiccation tolerant and relatively long lived using four closely related UK terrestrial specie...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcu139
更新日期:2014-09-01 00:00:00
abstract:BACKGROUND AND AIMS:High temperatures over 32-36 degrees C at anthesis induce spikelet sterility in rice. The use of a germplasm with an early-morning flowering (EMF) trait has been hypothesized as a way of avoiding this problem. In this study, the effect of the EMF trait on avoiding high temperature-induced sterility ...
journal_title:Annals of botany
pub_type: 杂志文章
doi:10.1093/aob/mcq124
更新日期:2010-09-01 00:00:00