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62 results for “Locusta migratoria”
Data from: Cold-acclimation increases depolarization resistance and tolerance in muscle fibers from a chill-susceptible insect, Locusta migratoria
<p>Cold exposure depolarizes cells in insects due to a reduced electrogenic ion transport and a gradual increase in extracellular [K<sup>+</sup>]. Cold-induced depolarization is linked to cold injury in chill-susceptible insects, and the locust, <i>Locusta migratoria</i>, has shown improved cold tolerance following cold-acclimation through depolarization resistance. Here we investigate how cold-acclimation influences depolarization resistance and how this resistance relates to improved cold tolerance. To address this question, we investigated if cold-acclimation affects the electrogenic transport capacity and/or the relative K<sup>+</sup> permeability during cold exposure by measuring membrane potentials of warm- and cold-acclimated locusts in the presence/absence of ouabain (Na<sup>+</sup>/K<sup>+</sup> pump blocker) or 4-aminopyridine (4-AP, voltage-gated K<sup>+</sup> channel blocker). In addition, we compared the membrane lipid composition of muscle tissue from warm- and cold-acclimated locust, and the abundance of a range transcripts related to ion transport and cell injury accumulation. We found that cold-acclimated locusts are depolarization resistant due to an elevated K<sup>+</sup> permeability, facilitated by opening of 4-AP sensitive K<sup>+</sup> channels. In accordance, cold-acclimation was associated with an increased abundance of <i>shaker</i> transcripts (gene encoding 4-AP sensitive voltage-gated K<sup>+</sup> channels). Furthermore, we found that cold-acclimation improved muscle cell viability following exposure to cold and hyperkalemia even when muscles were depolarized substantially. Thus, cold-acclimation confers resistance to depolarization by altering the relative ion permeability, but cold-acclimated locusts are also more tolerant to depolarization.</p>
Supplementary material 1 from: Tanaka S (2024) Geographic variation in body size of the migratory locust Locusta migratoria (Orthoptera, Acrididae): Masaki's cline and phase polyphenism. Journal of Orthoptera Research 33(1): 27-40. https://doi.org/10.3897/jor.33.107242
Supplementary material 1 from: Tanaka S (2024) Geographic variation in body size of the migratory locust Locusta migratoria (Orthoptera, Acrididae): Masaki's cline and phase polyphenism. Journal of Orthoptera Research 33(1): 27-40. https://doi.org/10.3897/jor.33.107242
Supplementary material 3 from: Tanaka S, Tokuda M (2024) Occurrence of giant migratory locust Locusta migratoria (Acrididae) on Tsushima Island, Japan. Journal of Orthoptera Research 33(1): 113-126. https://doi.org/10.3897/jor.33.112789
Supplementary material 3 from: Tanaka S, Tokuda M (2024) Occurrence of giant migratory locust Locusta migratoria (Acrididae) on Tsushima Island, Japan. Journal of Orthoptera Research 33(1): 113-126. https://doi.org/10.3897/jor.33.112789
Supplementary material 2 from: Tanaka S, Tokuda M (2024) Occurrence of giant migratory locust Locusta migratoria (Acrididae) on Tsushima Island, Japan. Journal of Orthoptera Research 33(1): 113-126. https://doi.org/10.3897/jor.33.112789
Supplementary material 2 from: Tanaka S, Tokuda M (2024) Occurrence of giant migratory locust Locusta migratoria (Acrididae) on Tsushima Island, Japan. Journal of Orthoptera Research 33(1): 113-126. https://doi.org/10.3897/jor.33.112789
Supplementary material 1 from: Tanaka S, Tokuda M (2024) Occurrence of giant migratory locust Locusta migratoria (Acrididae) on Tsushima Island, Japan. Journal of Orthoptera Research 33(1): 113-126. https://doi.org/10.3897/jor.33.112789
Supplementary material 1 from: Tanaka S, Tokuda M (2024) Occurrence of giant migratory locust Locusta migratoria (Acrididae) on Tsushima Island, Japan. Journal of Orthoptera Research 33(1): 113-126. https://doi.org/10.3897/jor.33.112789
Supplementary material 3 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 3 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 1 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 1 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 2 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 2 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 4 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Supplementary material 4 from: Tanaka S (2017) Locusta migratoria (Orthoptera: Acrididae) embryos monitor neighboring eggs for hatching synchrony. Journal of Orthoptera Research 26: 103-115. https://doi.org/10.3897/jor.26.20935
Data from: Cold-acclimation increases depolarization resistance and tolerance in muscle fibers from a chill-susceptible insect, Locusta migratoria
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Fig 11 from: Tanaka S (2024) Geographic variation in body size of the migratory locust Locusta migratoria (Orthoptera, Acrididae): Masaki's cline and phase polyphenism. Journal of Orthoptera Research 33(1): 27-40. https://doi.org/10.3897/jor.33.107242
Fig 11 Nymphal development in G1 Locusta migratoria reared at LD 12:12 h (A) and LD 16:8 h (B) and the ratios of nymphal development at LD 16:8h to that at LD 12:12 h (C) plotted against the latitudes. Red and green symbols indicate females and males, respectively. N indicates sample size based on Suppl. material 1: table S9. **, p < 0.01.
Fig 10 from: Tanaka S (2024) Geographic variation in body size of the migratory locust Locusta migratoria (Orthoptera, Acrididae): Masaki's cline and phase polyphenism. Journal of Orthoptera Research 33(1): 27-40. https://doi.org/10.3897/jor.33.107242
Fig 10 Body weight of hatchlings from eggs laid by G0 and G1 Locusta migratoria females. Each N is based on 51–443 hatchlings (mean = 190.8). N indicates the number of populations (see Suppl. material 1: table S8). Correlations are insignificant at the 5% level.
Fig 9 from: Tanaka S (2024) Geographic variation in body size of the migratory locust Locusta migratoria (Orthoptera, Acrididae): Masaki's cline and phase polyphenism. Journal of Orthoptera Research 33(1): 27-40. https://doi.org/10.3897/jor.33.107242
Fig 9 Numbers of ovarioles in field-collected and lab-reared Locusta migratoria females plotted against the latitudes (A), generations (B), and head widths of females of the parental generation, (C) and the proportions of functional ovarioles (no. of eggs / no. of ovarioles) plotted against the latitudes in field-collected females (D). **, p < 0.01; ***, p < 0.001. G0, field-collected generation; G1, 1st lab-reared generation; G2, 2nd lab-reared generation. Mean numbers of ovarioles (± SD) among generations in (B) are compared with the Tukey's multiple comparison test. Different letters indicate significant differences at the 5% level. Data are based on Suppl. material 1: table S6.
Fig 6 from: Tanaka S (2024) Geographic variation in body size of the migratory locust Locusta migratoria (Orthoptera, Acrididae): Masaki's cline and phase polyphenism. Journal of Orthoptera Research 33(1): 27-40. https://doi.org/10.3897/jor.33.107242
Fig 6 Geographic variation in head widths of Locusta migratoria adults reared at LD 12:12 h or LD 16:8 h (30°C) in the first 3 laboratory generations. Red and green symbols showing means per cage indicate females and males, respectively. Data are based on Suppl. material 1: table S3.
Fig 13 from: Tanaka S (2024) Geographic variation in body size of the migratory locust Locusta migratoria (Orthoptera, Acrididae): Masaki's cline and phase polyphenism. Journal of Orthoptera Research 33(1): 27-40. https://doi.org/10.3897/jor.33.107242
Fig 13 The growth efficiencies, as determined by adult head width/duration of nymphal development, plotted against the latitudes (A) and correlation between adult head widths of G0 and growth efficiencies of G1 at LD 12:12 h (B) or LD 16:8 h (C) in Locusta migratoria. N indicates sample sizes. **; p < 0.01; ***, p< 0.0001. Red and green symbols indicate females and males, respectively. In (A) the quadrat equation is y = -0.0003x2 + 0.0248x - 0.1684 in females and y = -0.0003x2 + 0.0248x - 0.1684 in males. Data are based on Suppl. material 1: tables S9, S10.
Fig 14 from: Tanaka S (2024) Geographic variation in body size of the migratory locust Locusta migratoria (Orthoptera, Acrididae): Masaki's cline and phase polyphenism. Journal of Orthoptera Research 33(1): 27-40. https://doi.org/10.3897/jor.33.107242
Fig 14 F/C (hind femur length / head width) and E/F (forewing length/hind femur length) ratios of Locusta migratoria adults collected in the field (G0) and those reared at LD 12:12 h (G1–G3). Red and green symbols indicate females and males, respectively. Symbols in (A) and (E) indicate the mean of each population and those in (B–D, F–H) indicate the mean of individuals per cage. Data are based on Suppl. material 1: tables S2, S3. *, p < 0.05; **; p < 0.01; ***, p < 0.0001.
Fig 3 from: Tanaka S (2024) Geographic variation in body size of the migratory locust Locusta migratoria (Orthoptera, Acrididae): Masaki's cline and phase polyphenism. Journal of Orthoptera Research 33(1): 27-40. https://doi.org/10.3897/jor.33.107242
Fig 3 Geographic variation in head widths (mean ± SD) of Locusta migratoria adults collected at various latitudes. Top and bottom diagrams illustrate the phylogenetic origin (Tokuda et al. 2010) and number of generations per year (as shown in Fig. 2). Red and green symbols indicate females and males, respectively. r indicates the correlation coefficient within each zone (see Suppl. material 1: table S3). *, p < 0.05; **, p < 0.01. Data are based on Suppl. material 1: table S2.
Fig 1 from: Tanaka S (2024) Geographic variation in body size of the migratory locust Locusta migratoria (Orthoptera, Acrididae): Masaki's cline and phase polyphenism. Journal of Orthoptera Research 33(1): 27-40. https://doi.org/10.3897/jor.33.107242
Fig 1 Collection sites of Locusta migratoria in Japan. Numbers indicate the sites where locusts were collected. For the names of the sites, see Suppl. material 1: table S1.
Fig 16 from: Tanaka S (2024) Geographic variation in body size of the migratory locust Locusta migratoria (Orthoptera, Acrididae): Masaki's cline and phase polyphenism. Journal of Orthoptera Research 33(1): 27-40. https://doi.org/10.3897/jor.33.107242
Fig 16 Relationships between male and female head widths of field-collected Locusta migratoria adults. The dashed line indicates similar body sizes of both sexes. Data are based on Suppl. material 1: table S2.
Fig 8 from: Tanaka S (2024) Geographic variation in body size of the migratory locust Locusta migratoria (Orthoptera, Acrididae): Masaki's cline and phase polyphenism. Journal of Orthoptera Research 33(1): 27-40. https://doi.org/10.3897/jor.33.107242
Fig 8 Relationships between numbers of eggs per pod, egg pod widths, and head widths of Locusta migratoria female parents collected in the field. *, p < 0.05; ***, p < 0.001. Orange and white symbols indicate populations of the north and south clades, respectively. Data are based on Suppl. material 1: table S5.
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