Phylogenetic relationships in Disa based on non-coding trnL-trnF chloroplast sequences: evidence of numerous repeat regions.

abstract：PREMISE OF THE STUDY:Uplift of the tropical Andes had a significant impact on the diversification of South American flora and fauna. Recent biogeographic inquiries have established patterns of Andean divergence, but investigations on ferns are scant. The fern genus Polystichum Roth (Dryopteridaceae) combines widespread...

journal_title：American journal of botany

authors： McHenry MA,Barrington DS

更新日期：2014-02-01 00:00:00

abstract：:Ontogenetic changes in architecture, carbohydrate reserves, and resource allocation can constrain the ability of plants to compensate for herbivore damage. To evaluate ontogenetic changes in compensation, saplings and reproductive individuals of the tropical tree Casearia nitida were subjected to three levels of defol...

journal_title：American journal of botany

authors： Boege K

更新日期：2005-10-01 00:00:00

abstract：:Seeds are useful in distinguishing among extant genera of Vitaceae and provide a good basis for interpretation of fossil remains in reconstructing the evolutionary and phytogeographic history of this putatively basal Rosid family. Seeds of Ampelocissus s.l. including Pterisanthes and Nothocissus are distinguished from...

journal_title：American journal of botany

authors： Chen I,Manchester SR

更新日期：2007-09-01 00:00:00

abstract：:Many plant species contain populations with more than one polyploid cytotype, but little is known of the mechanisms maintaining several cytotypes in a population. Andropogon gerardii cytotypes were compared to evaluate different models of autopolyploid cytotype coexistence. The enneaploid (90 chromosome, 9x) cytotype ...

journal_title：American journal of botany

authors： Keeler KH,Davis GA

更新日期：1999-07-01 00:00:00

abstract：UNLABELLED: PREMISE OF THE STUDY:Microsatellite markers were isolated and characterized in Mimulus ringens (Phrymaceae), a herbaceous wetland perennial, to facilitate studies of mating patterns and population genetic structure. • METHODS AND RESULTS:A total of 42 polymorphic loci were identified from a sample of 24 i...

journal_title：American journal of botany

authors： Nunziata SO,Karron JD,Mitchell RJ,Lance SL,Jones KL,Trapnell DW

更新日期：2012-12-01 00:00:00

abstract：:Prior field studies have shown that populations of forest herbs on relatively nutrient poor soils have higher vesicular-arbuscular mycorrhizal (VAM) infection intensity than plants on rich soils. However, the growth responses and ability to take up P against the soil nutrient gradient are often not linearly related to...

journal_title：American journal of botany

authors： Boerner REJ

更新日期：1990-04-01 00:00:00

abstract：:The genus Caltha (Ranunculaceae) consists of 10 species of low-growing, perennial herbs distributed throughout the moist temperate and cold regions of both the Northern and Southern Hemispheres. Traditionally, the species have been divided into two sections: section Psychrophila in the Southern Hemisphere with diploph...

journal_title：American journal of botany

authors： Schuettpelz E,Hoot SB

更新日期：2004-02-01 00:00:00

abstract：UNLABELLED: PREMISE OF THE STUDY:Phenolic compounds exuded by roots have been implicated in allelopathic interactions among plants. Root enzymes that destroy phenolics may protect plants against allelopathic inhibition and thus may aid in invasiveness. Phenolic-degrading enzymes are chiefly found in aboveground plant ...

journal_title：American journal of botany

authors： Holzapfel C,Shahrokh P,Kafkewitz D

更新日期：2010-07-01 00:00:00

abstract：PREMISE OF THE STUDY:We developed microsatellite loci for the biomass crop Miscanthus sinensis to investigate genetic diversity and population structure of M. sinensis and its closely related species. METHODS AND RESULTS:Fourteen microsatellite loci were identified from an enriched genomic library of M. sinensis and t...

journal_title：American journal of botany

authors： Zhou HF,Li SS,Ge S

更新日期：2011-07-01 00:00:00

abstract：UNLABELLED: PREMISE OF THE STUDY:A mixture of outcrossing and selfing is often observed in plant populations. Although mixed mating is ubiquitous, it has several potential evolutionary explanations. Mixed mating may be actively maintained by selection, passively determined by the pollination environment, or a transiti...

journal_title：American journal of botany

authors： Busch JW,Herlihy CR,Gunn L,Werner WJ

更新日期：2010-06-01 00:00:00

abstract：:Phylogenetic analyses of Meliaceae, including representatives of all four currently recognized subfamilies and all but two tribes (32 genera and 35 species, respectively), were carried out using DNA sequence data from three regions: plastid genes rbcL, matK (partial), and nuclear 26S rDNA (partial). Individual and com...

journal_title：American journal of botany

authors： Muellner AN,Samuel R,Johnson SA,Cheek M,Pennington TD,Chase MW

更新日期：2003-03-01 00:00:00

abstract：PREMISE OF THE STUDY:The evolutionary shift from radial to bilateral symmetry in flowers is generally associated with the evolution of low flower-size variation. This phenomenon supports the hypothesis that the lower size variation in bilateral flowers can be attributed to low pollinator diversity. In this study, we pr...

journal_title：American journal of botany

authors： Nikkeshi A,Kurimoto D,Ushimaru A

更新日期：2015-12-01 00:00:00

abstract：:Primarily known only by the edible fruits of Citrus, Rutaceae comprise a large (c. 160 genera and 1900 species), morphologically diverse, cosmopolitan family. Of its extraordinary array of secondary chemical compounds, many have medicinal, antimicrobial, insecticidal, or herbicidal properties. To assist with the much-...

journal_title：American journal of botany

authors： Groppo M,Pirani JR,Salatino ML,Blanco SR,Kallunki JA

更新日期：2008-08-01 00:00:00

abstract：PREMISE OF THE STUDY:Little is known about the effect of environmental conditions on seed dormancy break at the community level or how it could be affected by climate change. This study tested the effects of storage conditions on germination of 489 species from high-elevation natural grasslands on the Tibet Plateau. M...

journal_title：American journal of botany

authors： Liu K,Baskin JM,Baskin CC,Bu H,Liu M,Liu W,Du G

更新日期：2011-01-01 00:00:00

abstract：PREMISE OF THE STUDY:Giant cacti species possess long cylindrical stems that store massive amounts of water and other resources to draw on for photosynthesis, growth, and reproduction during hot and dry conditions. Across all giant cacti taxa, stem photosynthetic surface area to volume ratio (S:V) varies by several fol...

journal_title：American journal of botany

authors： Huber J,Dettman DL,Williams DG,Hultine KR

更新日期：2018-10-01 00:00:00

abstract：PREMISE:Despite the efforts to understand the processes that shape neotropical biodiversity, the complexity of certain biomes, such as the Atlantic Forest (AF), prevents the generalization of patterns. Initially, ecological niche modeling (ENM), with phylogeographic studies, identified past stable areas in the central ...

journal_title：American journal of botany

authors： Aguiar-Melo C,Zanella CM,Goetze M,Palma-Silva C,Hirsch LD,Neves B,da Costa AF,Bered F

更新日期：2019-07-01 00:00:00

abstract：UNLABELLED: PREMISE OF THE STUDY:The role of hybridization in plant evolution remains a source of intense debate. Potential consequences range from genetic dead-ends to species fusion or hybrid speciation. While much has been learned from model systems such as Populus, Iris, and Helianthus, many questions remain. Cons...

journal_title：American journal of botany

authors： Furches MS,Small RL,Furches A

更新日期：2013-10-01 00:00:00

abstract：PREMISE OF THE STUDY:Variation in demographic parameters reflects the life-history strategies of plants in response to specific environments. We aimed to investigate the intraspecific variation in life-history traits of a clonal alpine herb, Gentiana nipponica, in various snowmelt conditions. METHODS:Individual ramets...

journal_title：American journal of botany

authors： Kawai Y,Kudo G

更新日期：2018-11-01 00:00:00

abstract：:Genetic diversity at variable-number-tandem-repeat (VNTR) loci was examined in the common cattail, Typha latifolia (Typhaceae), using three synthetic DNA probes composed of tandemly repeated "core" sequences (GACA, GATA, and GCAC). The principal objectives of this investigation were to determine whether: (1) the previ...

journal_title：American journal of botany

authors： Keane B,Pelikan S,Toth GP,Smith MK,Rogstad SH

更新日期：1999-09-01 00:00:00

abstract：:In an age of rapid global change, it is imperative that we continue to improve our understanding of factors that govern genetic differentiation in plants to inform biologically reasonable predictions for the future and enlighten conservation and restoration practices. In this special issue, we have assembled a set of ...

journal_title：American journal of botany

authors： Etterson JR,Schneider HE,Gorden NL,Weber JJ

更新日期：2016-01-01 00:00:00

abstract：:The specific shape of the relationship between plant diversity and productivity and the causal mechanism(s) behind the observed pattern(s) are still highly debated. Recent advances suggest that the relationship depends on several environmental variables and may change with the observational scale. In this study, a mul...

journal_title：American journal of botany

authors： de Lafontaine G,Houle G

更新日期：2007-01-01 00:00:00

abstract：:The genus Rosa has a complex evolutionary history caused by several factors, often in conjunction: extensive hybridization, recent radiation, incomplete lineage sorting, and multiple events of polyploidy. We examined the applicability of AFLP markers for reconstructing (species) relationships in Rosa, using UPGMA clus...

journal_title：American journal of botany

authors： Koopman WJ,Wissemann V,De Cock K,Van Huylenbroeck J,De Riek J,Sabatino GJ,Visser D,Vosman B,Ritz CM,Maes B,Werlemark G,Nybom H,Debener T,Linde M,Smulders MJ

更新日期：2008-03-01 00:00:00

abstract：:Breakdown of genetically enforced self-incompatibility (SI), an extremely common and important evolutionary transition in plants, has conventionally been conceived as a qualitative rather than a quantitative change. We evaluated qualitative and quantitative variation in SI for four populations of Witheringia solanacea...

journal_title：American journal of botany

authors： Stone JL,Sasuclark MA,Blomberg CP

更新日期：2006-04-01 00:00:00

abstract：PREMISE OF THE STUDY:Sex lability (i.e., gender diphasy) in plants is classically linked to the larger resource needs associated with the female sexual function (i.e., seed production) compared to the male function (i.e., pollen production). Sex lability in response to the environment is extensively documented in dioec...

journal_title：American journal of botany

authors： Varga S,Kytöviita MM

更新日期：2016-11-01 00:00:00

abstract：UNLABELLED: PREMISE OF THE STUDY:Verbenaceae consist of trees, shrubs, lianas, and herbs distributed primarily in Latin America, where they occur in a wide array of ecosystems. A second center of diversity exists in Africa. Competing morphology-based classifications that rely on different traits conflict in significan...

journal_title：American journal of botany

authors： Marx HE,O'Leary N,Yuan YW,Lu-Irving P,Tank DC,Múlgura ME,Olmstead RG

更新日期：2010-10-01 00:00:00

abstract：:In plants, polyploidy has been a significant evolutionary force on both recent and ancient time scales. In 1950, Ownbey reported two newly formed Tragopogon allopolyploids in the northwestern United States. We have made the first synthetic lines of T. mirus and T. miscellus using T. dubius, T. porrifolius, and T. prat...

journal_title：American journal of botany

authors： Tate JA,Symonds VV,Doust AN,Buggs RJ,Mavrodiev E,Majure LC,Soltis PS,Soltis DE

更新日期：2009-05-01 00:00:00

abstract：PREMISE:Polyploidy may serve to contribute to range size if autopolyploid cytotypes are adapted to differing ecological conditions. This study aims to establish the geographic distribution of cytotypes within the giant goldenrod (Solidago gigantea), and to assess whether cytotypes exhibit differing ecological tolerance...

journal_title：American journal of botany

authors： Martino M,Semple JC,Beck JB

更新日期：2020-11-01 00:00:00

abstract：PREMISE OF THE STUDY:Plant-herbivore networks are highly specialized in their interactions, yet they are highly variable with regard to the relative importance of specific host species for herbivores. How host species traits determine specialization and species strength in this antagonistic network is still an unanswer...

journal_title：American journal of botany

authors： López-Carretero A,Boege K,Díaz-Castelazo C,Domínguez Z,Rico-Gray V

更新日期：2016-08-01 00:00:00

abstract：PREMISE OF THE STUDY:Plants adjust their phenology in response to seasonal cues experienced both by their parents and by themselves, and coordinating responses to these cues is necessary for expressing adaptive phenology. We investigated how cues are integrated across time to influence an important progeny phenotype, i...

journal_title：American journal of botany

authors： Imaizumi T,Auge G,Donohue K

更新日期：2017-04-01 00:00:00

abstract：:Caryophyllaceae is a principally holarctic family including around 2200 species often classified into the three subfamilies Alsinoideae, Caryophylloideae, and Paronychioideae. Complex and possibly homoplasious morphological characters within the family make taxa difficult to delimit and diagnose. To explore part of th...

journal_title：American journal of botany

authors： Fior S,Karis PO,Casazza G,Minuto L,Sala F

更新日期：2006-03-01 00:00:00