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52 results for “Alternanthera”
Alternanthera Sessilis
<p>Alternanthera Sessilis taken by Nirmaladevi Ponnusamy on 25.01.2022 from Vellore</p>
Figure 3. Phylogenetic relationships and intra specific recombination patterns among different AlYVV molecules. The maximumlikelihood phylogenetic tree contains 27 in Alternanthera yellow vein virus (AYVV); a betasatellite independent begomovirus infecting Sonchus palustris in Pakistan
Figure 3. Phylogenetic relationships and intra specific recombination patterns among different AlYVV molecules. The maximumlikelihood phylogenetic tree contains 27 known complete genomes of AlYVV from databank and two complete genomes determined in this study (indicated in black boxes). The tree was rooted on ToLCNDV (AB613826) as an out-group. The schematic representation of recombination events detected by RDP4. Arrows and blocks at the bottom correspond respectively to open reading frames (ORFs) and intergenic regions: pre-coat protein (AV2), coat protein (CP), replication-associated proteins (Rep and REn), transcriptional protein (TrAP), and AC4 region. AlYVV from different countries were colored differently. The colors of blocks represent the different ALYVV species and strains. Numbers at nodes indicate bootstrap confidence scores (1000 replicates).
Figure 1 in Alternanthera yellow vein virus (AYVV); a betasatellite independent begomovirus infecting Sonchus palustris in Pakistan
Figure 1. Sonchus Palustris plant and cloning of begomovirus: (A) Asymptomatic plant showing vein yellowing symptoms; (B) Symptomatic plant; (C) Amplification using Phi29 DNA polymerase, restriction and cloning of viral molecules; (lane 1-2) Amplified RCA product, (lane 3-4) restriction of RCA product resulted in 2.8kb fragment usingEco RI, (lane 6-7) Confirmation of cloning of virus 2.8kb in pTZ57R vector using EcoRI and Hindlll, lane 5 shows 1Kb marker. Size of pTZ57R vector is also 2.88 Kb.
Figure 4 in Alternanthera yellow vein virus (AYVV); a betasatellite independent begomovirus infecting Sonchus palustris in Pakistan
Figure 4. Comparison of the phylogenetic trees of the Rep-gene (A) and CP-gene (B) of AlYVV for recombination analysis. AlYVV from different countries were colored differently. Lines show assortment of Rep gene and CP genes in different clusters showing intraspecific recombination. Rep and CP gene from AlYVV determined in this study are indicated in black boxes. Clade I contains AlYVV and clade II encompasses closely related viruses like LuYVVNV, RaLCV and AEV. The trees were arbitrarily rooted on the sequences of the Tomato leaf curl New Delhi virus (AB613826). Numbers at nodes indicate bootstrap confidence scores (1000 replicates).
Alternanthera sp. (BR0000010601235)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera sp. (BR0000010600542)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera sp. (BR0000010600689)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera sp. (BR0000010600719)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera sp. (BR0000010601044)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera sp. (BR0000010602089)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera sp. (BR0000010600740)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera sp. (BR0000010600481)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera sessilis (L.) R.Br. ex DC. (BR0000010602416)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera tenella Colla (BR0000012167364)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera sessilis (L.) R.Br. ex DC. (BR0000010601754)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera sessilis (L.) R.Br. ex DC. (BR0000010602744)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera ficoidea (L.) P.Beauv. (BR0000025600056V)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alternanthera sessilis (L.) R.Br. ex DC. (BR0000010602768)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Alien plant species are precursors for invasion: a case study of Alternanthera brasiliana (L.) Kuntze in Ile-Ife (Nigeria)
<p>The impact of <em>Alternanthera brasiliana</em> on vegetation and soil seed bank was assessed in Ile-Ife, Nigeria. Ten sample plots, 10 m x 10 m each, were established in invaded plant communities with high density of <em>Alternanthera brasiliana</em> and adjacent uninvaded plant communities where the weed species has low density. In each sample plot, twenty 1 m x 1 m quadrats were randomly laid and all rooted plant species were identified and counted. Post-dispersal soil seed bank was collected by randomly taking five core samples of top soil per sample plot to estimate the soil seed bank density and floristics of the sites. The species composition of soil seed bank was compared with that of the above-ground vegetation so as to assess the invader's impact on the vegetation using Sorensen's index of similarity. The results showed that <em>Alternanthera brasiliana</em> invasion significantly impacted on the species diversity (<em>t</em> = 5.27; <em>df</em> = 18; <em>p</em> = 0.0003) and evenness of species distribution (<em>t</em> = 4.50; <em>df</em> = 18; <em>p</em> = 0.00005) in the aboveground vegetation, and the species diversity (<em>t</em> = 5.37; <em>df</em> = 18; <em>p</em> = 0.00004) and evenness of species distribution (<em>t</em> = 6.19; <em>df</em> = 18; <em>p</em> < 0.0001) in the soil seed bank. This study concluded that <em>Alternanthera brasiliana</em> has significantly caused alterations in key parameters of the aboveground vegetation and those of the soil seed bank. It is likely that with increasing resident time, these alterations might increase more significantly to enhance the spread of <em>Alternanthera brasiliana</em>.</p>
Alien plant species are precursors for invasion: a case study of Alternanthera brasiliana (L.) Kuntze in Ile-Ife (Nigeria)
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