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1. A Preliminary Study of Genetic Variation in Populations of Monstera adansonii var. klotzschiana (Araceae) from North-East Brazil, Estimated with AFLP Molecular Markers

Author:
Andrade, I.M.; Mayo, S.J.; van den Berg, C.; Fay, M.F.; Chester, M.; Lexer, C.; Kirkup, D.
Source:
Annals of botany 2007 v.100 no.6 pp. 1143-1154
ISSN:
0305-7364
Subject:
Monstera; amplified fragment length polymorphism; forests; gene flow; genes; genetic correlation; genetic distance; genetic markers; genetic variation; Amazonia; Brazil
Abstract:
... BACKGROUND AND AIMS: This study sought genetic evidence of long-term isolation in populations of Monstera adansonii var. klotzschiana (Araceae), a herbaceous, probably outbreeding, humid forest hemi-epiphyte, in the brejo forests of Ceará (north-east Brazil), and clarification of their relationships with populations in Amazonia and the Atlantic forest of Brazil. METHODS: Within-population genetic ...
DOI:
10.1093/aob/mcm200
PubMed:
17823112
PubMed Central:
PMC2759243

2. Chilling Tolerance of Central European Maize Lines and their Factorial Crosses

Author:
Bhosale, S.U.; Rymen, B.; Beemster, G.T.S.; Melchinger, A.E.; Reif, J.C.
Source:
Annals of botany 2007 v.100 no.6 pp. 1315-1321
ISSN:
0305-7364
Subject:
chlorophyll; corn; crop production; developmental stages; field experimentation; growth chambers; hybrids; leaves; maternal effect; quantitative trait loci; testcrosses
Abstract:
... BACKGROUND AND AIMS: Chilling-stress tolerance is a prerequisite for maize production under cool climatic conditions. The main goal of this study was to evaluate the Central European dent and flint pools for chilling tolerance during heterotrophic and early autotrophic growth in field trials and growth chamber experiments. METHODS: Five European flint and five dent inbreds and their 25 factorial c ...
DOI:
10.1093/aob/mcm215
PubMed:
17881337
PubMed Central:
PMC2759256

3. Comparing Morphological Plasticity of Root Orders in Slow- and Fast-growing Citrus Rootstocks Supplied with Different Nitrate Levels

Author:
Sorgonà', Agostino; Abenavoli, Maria Rosa; Gringeri, Pietro Giorgio; Cacco, Giovanni
Source:
Annals of botany 2007 v.100 no.6 pp. 1287-1296
ISSN:
0305-7364
Subject:
Citrus jambhiri; Citrus reshni; dry matter partitioning; nitrates; root growth; roots; rootstocks; systems analysis; tap roots
Abstract:
... BACKGROUND AND AIMS: Studies of the plasticity of functional root traits involved in resource acquisition have focused mainly on root length without considering such 'morphological components' as biomass allocation, specific root length, root fineness, and tissue density that affect root length. The plasticity of the above components in response to nitrate supply was studied in each root order of ...
DOI:
10.1093/aob/mcm207
PubMed:
17881338
PubMed Central:
PMC2759249

4. Conservative Decrease in Water Potential in Existing Leaves during New Leaf Expansion in Temperate and Tropical Evergreen Quercus Species

Author:
Saito, Takami; Naiola, B. Paul; Terashima, Ichiro
Source:
Annals of botany 2007 v.100 no.6 pp. 1229-1238
ISSN:
0305-7364
Subject:
Quercus glauca; branches; buds; leaf water potential; leaves; shoots; stomatal conductance; trees; turgor; Indonesia; Japan
Abstract:
... BACKGROUND AND AIMS: This study aimed at clarifying how the water potential gradient (ΔΨ) is maintained in the shoots of evergreen trees with expanding leaves, whose leaf water potentials at the turgor loss point (Ψtlp) are generally high. MATERIALS: The water relations were examined in current-year expanding (CEX) and 1-year-old (OLD) leaves on the same shoots in temperate (Osaka, Japan) and trop ...
DOI:
10.1093/aob/mcm198
PubMed:
17855379
PubMed Central:
PMC2759242

5. Cryptic Speciation in the Caesalpinia hintonii Complex (Leguminosae: Caesalpinioideae) in a Seasonally Dry Mexican Forest

Author:
Sotuyo, Solange; Delgado-Salinas, Alfonso; Chase, Mark W.; Lewis, Gwilym P.; Oyama, Ken
Source:
Annals of botany 2007 v.100 no.6 pp. 1307-1314
ISSN:
0305-7364
Subject:
Caesalpinioideae; adaptation; dry forests; genetic variation; indigenous species; intergenic DNA; legumes; models; phylogeny; valleys
Abstract:
... BACKGROUD AND AIMS: The Caesalpinia hintonii group comprises six species of endemic shrubs or trees, C. epifanioi, C. hintonii, C. laxa, C. macvaughii, C. melanadenia and C. oyamae, found in scattered patches of seasonally dry forest in the Río Balsas depression and the neighbouring Tehuacán-Cuicatlán valley, which are part of the Mexican morphotectonic province of Sierra Madre del Sur. An evaluat ...
DOI:
10.1093/aob/mcm213
PubMed:
17913727
PubMed Central:
PMC2759254

6. Ecology of Achene Dimorphism in Leontodon saxatilis

Author:
Brändel, Markus
Source:
Annals of botany 2007 v.100 no.6 pp. 1189-1197
ISSN:
0305-7364
Subject:
Leontodon; biomass; deserts; dimorphism; dormancy; fruits; germination; growing season; habitats; morphs; nutrients; root shoot ratio; roots; seedlings; seeds; shoots; soil; soil water regimes; temperature; wind
Abstract:
... BACKROUND AND AIMS LEONTODON SAXATILIS: produces two morphologically distinct achenes (morphs) in a single capitulum: one row of dark brown achenes without a pappus lies at the edge ('peripheral achenes'; 0·74 ± 0·18 mg) while the inner ones are light brown with a pappus ('central achenes'; 0·38 ± 0·07 mg). The hypothesis that achene heteromorphism in L. saxatilis widens its ecological amplitude w ...
DOI:
10.1093/aob/mcm214
PubMed:
17901060
PubMed Central:
PMC2759255

7. Extrafloral Nectaries in Aspen (Populus tremuloides): Heritable Genetic Variation and Herbivore-induced Expression

Author:
Wooley, Stuart C.; Donaldson, Jack R.; Gusse, Adam C.; Lindroth, Richard L.; Stevens, Michael T.
Source:
Annals of botany 2007 v.100 no.6 pp. 1337-1346
ISSN:
0305-7364
Subject:
Diptera; Populus tremuloides; age structure; chemical concentration; defoliation; environmental factors; genetic variation; genotype; herbivores; heritability; nectaries; predatory insects; prediction; tree age; tree classes; trees; Utah; Wisconsin
Abstract:
... BACKGROUND AND AIMS: A wide variety of plants produce extrafloral nectaries (EFNs) that are visited by predatory arthropods. But very few studies have investigated the relationship between plant genetic variation and EFNs. The presence of foliar EFNs is highly variable among different aspen (Populus tremuloides) genotypes and the EFNs are visited by parasitic wasps and predatory flies. The aim her ...
DOI:
10.1093/aob/mcm220
PubMed:
17951361
PubMed Central:
PMC2759261

8. Genome Size Variation and Species Relationships in Hieracium Sub-genus Pilosella (Asteraceae) as Inferred by Flow Cytometry

Author:
Suda, Jan; Krahulcová, Anna; Trávníček, Pavel; Rosenbaumová, Radka; Peckert, Tomáš; Krahulec, František
Source:
Annals of botany 2007 v.100 no.6 pp. 1323-1335
ISSN:
0305-7364
Subject:
DNA; Hieracium; Pilosella; chromosome number; chromosomes; cultivars; cytotypes; diploidy; evolution; flow cytometry; genetic polymorphism; genetic variation; hybrids; interspecific hybridization; introgression; iodides; nuclear genome; parents; polyploidy; Central European region
Abstract:
... BACKGROUND AND AIMS HIERACIUM: sub-genus Pilosella (hawkweeds) is a taxonomically complicated group of vascular plants, the structure of which is substantially influenced by frequent interspecific hybridization and polyploidization. Two kinds of species, 'basic' and 'intermediate' (i.e. hybridogenous), are usually recognized. In this study, genome size variation was investigated in a representativ ...
DOI:
10.1093/aob/mcm218
PubMed:
17921526
PubMed Central:
PMC2759259

9. How Many Genes are Needed to Make a Pollen Tube? Lessons from Transcriptomics

Author:
Becker, Jörg D.; Feijó, José A.
Source:
Annals of botany 2007 v.100 no.6 pp. 1117-1123
ISSN:
0305-7364
Subject:
Arabidopsis thaliana; case studies; gametophytes; gene expression; gene silencing; genes; genetic background; models; mutants; ovaries; pollen; pollen tubes; pollination; prediction; proteins; spermatozoa; sporophytes; transcriptomics
Abstract:
... BACKGROUND: Pollen is the male gametophyte of higher plants. Upon pollination, it germinates and develops into a fast-growing cytoplasmic extension, the pollen tube, which ultimately delivers the sperm into the ovary. The biological relevance of its role, and the uniqueness of this kind of cellular organization, have made pollen the focus of many approaches, and it stands today as one of the best- ...
DOI:
10.1093/aob/mcm208
PubMed:
17951360
PubMed Central:
PMC2759250

10. Inferring the Geometry of Fourth-Period Metallic Elements in Arabidopsis thaliana Seeds using Synchrotron-Based Multi-Angle X-ray Fluorescence Mapping

Author:
Young, Lester; Westcott, Neil; Christensen, Colleen; Terry, Jeff; Lydiate, Derek; Reaney, Martin
Source:
Annals of botany 2007 v.100 no.6 pp. 1357-1365
ISSN:
0305-7364
Subject:
Arabidopsis thaliana; X-radiation; analytical methods; fluorescence; genotype; image analysis; manganese; metabolism; mutants; seeds; tissue distribution
Abstract:
... BACKGROUND: Improving our knowledge of plant metal metabolism is facilitated by the use of analytical techniques to map the distribution of elements in tissues. One such technique is X-ray fluorescence (XRF), which has been used previously to map metal distribution in both two and three dimensions. One of the difficulties of mapping metal distribution in two dimensions is that it can be difficult ...
DOI:
10.1093/aob/mcm205
PubMed:
17881334
PubMed Central:
PMC2759247

11. Interactive Effects of Nutrient and Mechanical Stresses on Plant Morphology

Author:
Puijalon, Sara; Lena, Jean-Paul; Bornette, Gudrun
Source:
Annals of botany 2007 v.100 no.6 pp. 1297-1305
ISSN:
0305-7364
Subject:
aquatic plants; ground cover plants; habitats; leaves; mechanical stress; nutrient content; plant morphology; plant response; plant stress; stress response; water content; water supply
Abstract:
... BACKGROUND AND AIMS: Plant species frequently encounter multiple stresses under natural conditions, and the way they cope with these stresses is a major determinant of their ecological breadth. The way mechanical (e.g. wind, current) and resource stresses act simultaneously on plant morphological traits has been poorly addressed, even if both stresses often interact. This paper aims to assess whet ...
DOI:
10.1093/aob/mcm226
PubMed:
17913725
PubMed Central:
PMC2759263

12. Intercellular Pectic Protuberances in Asplenium: New Data on their Composition and Origin

Author:
Leroux, Olivier; Knox, J. Paul; Leroux, Frederic; Vrijdaghs, Alexander; Bellefroid, Elke; Borgonie, Gaëtan; Viane, Ronald L.L.
Source:
Annals of botany 2007 v.100 no.6 pp. 1165-1173
ISSN:
0305-7364
Subject:
epitopes; extracellular space; intercellular spaces; xylan; cell walls; electron microscopy; xyloglucans; Asplenium; extensin
Abstract:
... BACKGROUND AND AIMS: Projections of cell wall material into the intercellular spaces between parenchymatic cells have been observed since the mid-19th century. Histochemical staining suggested that these intercellular protuberances are probably pectic in nature, but uncertainties about their origin, composition and biological function(s) have remained. METHODS: Using electron and light microscopy, ...
DOI:
10.1093/aob/mcm210
PubMed:
17881333
PubMed Central:
PMC2759252

13. Is Eucalyptus Cryptically Self-incompatible

Author:
Horsley, Tasmien N.; Johnson, Steven D.
Source:
Annals of botany 2007 v.100 no.6 pp. 1373-1378
ISSN:
0305-7364
Subject:
Eucalyptus grandis; Eucalyptus urophylla; cross pollination; microscopy; pollen tubes; probability; seed yield; seeds; self-pollination
Abstract:
... BACKGROUND AND AIMS: The probability that seeds will be fertilized from self- versus cross-pollen depends strongly on whether plants have self-incompatibility systems, and how these systems influence the fate of pollen tubes. METHODS: In this study of breeding systems in Eucalyptus urophylla and Eucalyptus grandis, epifluorescence microscopy was used to study pollen tube growth in styles following ...
DOI:
10.1093/aob/mcm223
PubMed:
17881341
PubMed Central:
PMC2759262

14. Is Floral Longevity Influenced by Reproductive Costs and Pollination Success in Cohniella ascendens (Orchidaceae)

Author:
Abdala-Roberts, Luis; Parra-Tabla, Víctor; Navarro, Jorge
Source:
Annals of botany 2007 v.100 no.6 pp. 1367-1371
ISSN:
0305-7364
Subject:
Orchidaceae; buds; deblossoming; flowering; longevity; plant response; pollen; pollination
Abstract:
... BACKGROUND AND AIMS: Although studies have shown that pollen addition and/or removal decreases floral longevity, less attention has been paid to the relationship between reproductive costs and floral longevity. In addition, the influence of reproductive costs on floral longevity responses to pollen addition and/or removal has not yet been evaluated. Here, the orchid Cohniella ascendens is used to ...
DOI:
10.1093/aob/mcm219
PubMed:
17881335
PubMed Central:
PMC2759260

15. Mechanism and Control of Solanum lycocarpum Seed Germination

Author:
Pinto, Lilian V.A.; Da silva, Edvaldo A.A.; Davide, Antonio C.; De Jesus, Valquíria A. Mendes; Toorop, Peter E.; Hilhorst, Henk W.M.
Source:
Annals of botany 2007 v.100 no.6 pp. 1175-1187
ISSN:
0305-7364
Subject:
Solanum lycocarpum; abscisic acid; cerrado; coffee beans; crops; dispersions; endosperm; fruits; imbibition; indigenous species; microscopy; monitoring; seed germination; seeds; temperature; tomatoes
Abstract:
... BACKGROUND AND AIMS: Solanaceae seed morphology and physiology have been widely studied but mainly in domesticated crops. The present study aimed to compare the seed morphology and the physiology of germination of Solanum lycocarpum, an important species native to the Brazilian Cerrado, with two species with endospermic seeds, tomato and coffee. METHODS: Morphological parameters of fruits and seed ...
DOI:
10.1093/aob/mcm211
PubMed:
17855380
PubMed Central:
PMC2759253

16. Microsatellite Diversity of the Agriculturally Important Alpine Grass Poa alpina in Relation to Land Use and Natural Environment

Author:
Rudmann-Maurer, Katrin; Weyand, Anne; Fischer, Markus; Stöcklin, Jürg
Source:
Annals of botany 2007 v.100 no.6 pp. 1249-1258
ISSN:
0305-7364
Subject:
Poa alpina; agricultural land; alpine meadows; altitude; aneuploidy; forage; genetic variation; grasses; humans; land use change; microsatellite repeats; polyploidy; reproduction; species diversity; traditions; villages; Alps region
Abstract:
... BACKGROUND AND AIMS: The Alpine Meadow Grass Poa alpina is common in subalpine and alpine natural sites and agriculturally used land, where it is an important fodder grass. Natural factors and human land use are supposed to have been shaping its genetic diversity for hundreds of years. The species comprises sexually and vegetatively reproducing plants. The aim of this study was to investigate the ...
DOI:
10.1093/aob/mcm203
PubMed:
17901059
PubMed Central:
PMC2759245

17. Phylogeography of the Tree Hymenaea stigonocarpa (Fabaceae: Caesalpinioideae) and the Influence of Quaternary Climate Changes in the Brazilian Cerrado

Author:
Ramos, Ana Carolina Simões; Lemos-Filho, José Pires; Ribeiro, Renata Acácio; Santos, Fabrício Rodrigues; Lovato, Maria Bernadete
Source:
Annals of botany 2007 v.100 no.6 pp. 1219-1228
ISSN:
0305-7364
Subject:
Hymenaea; analysis of variance; cerrado; climate change; genetic variation; geographical distribution; indigenous species; phylogeography; population distribution; savannas; trees
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 led to its current spatial genetic pattern. METHODS: The polymorphism level and ...
DOI:
10.1093/aob/mcm221
PubMed:
17881340
PubMed Central:
PMC2759258

18. Population Dynamics of Diploid and Hexaploid Populations of a Perennial Herb

Author:
Münzbergová, Zuzana
Source:
Annals of botany 2007 v.100 no.6 pp. 1259-1270
ISSN:
0305-7364
Subject:
Aster amellus; diploidy; elasticities; extinction; habitats; herbivores; herbs; hexaploidy; life history; models; pollinators; population growth; probability; secondary contact
Abstract:
... BACKGROUND AND AIMS: Despite the recent enormous increase in the number of studies on polyploid species, no studies to date have explored the population dynamics of these taxa. It is thus not known whether the commonly reported differences in single life-history traits between taxa of different ploidy levels result in differences in population dynamics. METHODS: This study explores differences in ...
DOI:
10.1093/aob/mcm204
PubMed:
17881342
PubMed Central:
PMC2759246

19. Segregation for Sexual Seed Production in Paspalum as Directed by Male Gametes of Apomictic Triploid Plants

Author:
Martínez, Eric J.; Acuña, Carlos A.; Hojsgaard, Diego H.; Tcach, Mauricio A.; Quarin, Camilo L.
Source:
Annals of botany 2007 v.100 no.6 pp. 1239-1247
ISSN:
0305-7364
Subject:
Paspalum notatum; apomixis; chromosome number; chromosomes; crossing; diploidy; embryo sac; gametophytes; genetic markers; germ cells; parents; progeny; races; seeds; triploidy
Abstract:
... BACKGROUND AND AIMS: Gametophytic apomixis is regularly associated with polyploidy. It has been hypothesized that apomixis is not present in diploid plants because of a pleiotropic lethal effect associated with monoploid gametes. Rare apomictic triploid plants for Paspalum notatum and P. simplex, which usually have sexual diploid and apomictic tetraploid races, were acquired. These triploids norma ...
DOI:
10.1093/aob/mcm201
PubMed:
17766843
PubMed Central:
PMC2759244

20. South American Leaf Blight of the Rubber Tree (Hevea spp.): New Steps in Plant Domestication using Physiological Features and Molecular Markers

Author:
Lieberei, Reinhard
Source:
Annals of botany 2007 v.100 no.6 pp. 1125-1142
ISSN:
0305-7364
Subject:
Hevea brasiliensis; Microcyclus ulei; control methods; crops; cyanides; dieback; domestication; farmers; fungi; fungicides; genetic markers; genotype; leaf blight; leaf development; models; perennials; rubber; tree diseases; trees; South America
Abstract:
... BACKGROUND: Rubber trees (Hevea spp.) are perennial crops of Amazonian origin that have been spread over the whole tropical belt to guarantee worldwide production of natural rubber. This crop plant has found its place in many national economies of producing countries, and although its domestication by selection of suitable genotypes was very slow, it contributes a lot to the welfare of small farme ...
DOI:
10.1093/aob/mcm133
PubMed:
17650512
PubMed Central:
PMC2759241