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52 results for “Alternanthera”
FIGURE 3 in Alternanthera ebracteolata (Amaranthaceae), a new species from Kerala (SW- India)
FIGURE 3. SEM images of Alternanthera ebracteolata a. pollen; b. close up of pollen showing pores; c. seed surface (middle region); d. seed surface (margin).
FIGURE 2. Alternanthera ebracteolata. a in Alternanthera ebracteolata (Amaranthaceae), a new species from Kerala (SW- India)
FIGURE 2. Alternanthera ebracteolata. a. habit; b. synflorescence; c. flower; d. cross section of flower; e. appendages on androecium; f. outer sepal; g. inner sepal; h. gynoecium; i. seed.
Alternanthera philoxeroides haplotypes growth response to N and P
<p class="MsoNormal"><span><span>Interactions between invaders and resource availability may explain variation in their success or management efficacy. For widespread invaders, regional variation in plant response to nutrients can reflect phenotypic plasticity of the invader, genetic structure of invading populations, or a combination of the two. The wetland weed </span><span>Alternanthera philoxeroides</span><span> (alligatorweed) is established throughout the southeastern USA and California, and has high genetic diversity despite primarily spreading clonally. Despite its history in the USA, the role of genetic variation for invasion and management success is only now being uncovered. To better understand how nutrients and genotype may influence </span><span>A. philoxeroides</span><span> invasion, we measured the response of plants from 26 </span><span>A. philoxeroides</span><span> populations (three cp haplotypes) to combinations of nitrogen (</span><span>4 or 200 mg/L N) </span><span>and phosphorus </span><span>(0.4 or 40 mg/L P)</span><span>. We measured productivity (biomass accumulation and allocation), plant architecture (stem diameter and thickness, branching intensity) and foliar traits (toughness, dry matter content, percent N, percent P). A short-term developmental assay was also conducted by feeding a subset of plants from the nutrient experiment to the biological control agent </span><span>Agasicles hygrophila,</span><span> to determine whether increased availability of N or P to its host influenced agent performance, as has been previously suggested. </span><span>A. philoxeroides</span><span> haplotype Ap1 was more plastic than other haplotypes in response to nutrient amendments, producing more than double the biomass from low to high N and 50-68% higher shoot:root ratio than other haplotypes in the high N treatment. </span><span>A. philoxeroides</span><span> haplotypes differed in 7 of 10 variables in response to increased N. We found no differences in short-term </span><span>A. hygrophila</span><span> development between haplotypes but mass was 23% greater in high than low N treatments. This study is the first to explore the interplay between nutrient availability, genetic variation, and phenotypic plasticity in invasive characteristics of the global invader, </span><span>A. philoxeroides</span><span>.</span></span></p>
Alternanthera philoxeroides haplotypes growth response to N and P
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Rapid and widespread expansion of invasive Alternanthera philoxeroides promoted by its high and stable nitrogen, phosphorus and potassium homeostasis
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FIGURE 1 in Phenrica littoralis (Bechyné, 1955) (Coleoptera: Chrysomelidae) a potential candidate for the biological control of alligator weed, Alternanthera philoxeroides (Martius) Grisebach (Amaranthaceae): redescription of the adult, first description of immature stages, and biological notes
FIGURE 1. Phenrica littoralis (Bechyné), male, dorsal habitus.
Figure 2 in Alternanthera yellow vein virus (AYVV); a betasatellite independent begomovirus infecting Sonchus palustris in Pakistan
Figure 2. Color-coded matrix of pairwise nucleotide identity inferred from alignment of full-length AlYVV present in data bank. The matrix uses a discontinuous range of three shades of color (red, green and blue) differentiating two cut-off values representing the strain (93-94%, brown red) and the species (90-91%, yellow green) demarcation thresholds of begomoviruses. Identities were calculated with SDT v. 1.2.
Transcriptomics of cold stress in alligatorweed (Alternanthera philoxeroides)
GEO Series GSE63585. Alternanthera philoxeroides. 6 samples. Type: Expression profiling by high throughput sequencing.
Induction of miR162 contributes to invasive habitat adaption of Alternanthera philoxeroides
GEO Series GSE283087. Alternanthera philoxeroides. 66 samples. Type: Non-coding RNA profiling by high throughput sequencing.
FIGURE 2. Alternanthera indica. A in Alternanthera indica (Amaranthaceae), a new species from Kerala (India)
FIGURE 2. Alternanthera indica. A) habit; B) glomerule; C) opened flower; D) sepal (dorsal view); E) flower without sepals; F) appendage on the androecial tube; G) stamens.
FIGURE 1. Alternanthera ebracteolata. a in Alternanthera ebracteolata (Amaranthaceae), a new species from Kerala (SW- India)
FIGURE 1. Alternanthera ebracteolata. a. habit; b. synflorescence; c. flowering twig; d. inflorescence; e. flower; f–g. appendages on androecium and stamen; h. Outer sepal; i. inner sepal; j. gynoecium; k. seed.
De novo characterization of alligator weed (Alternanthera philoxeroides) transcriptome shedding light on gene expression under potassium deprivation
GEO Series GSE62244. Alternanthera philoxeroides. 2 samples. Type: Expression profiling by high throughput sequencing.
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Allen Brain Atlas
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