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Life table evaluation of survival and reproduction of the aphid, Sitobion avenae, exposed to cadmium.

Gao HH, Zhao HY, Du C, Deng MM, Du EX, Hu ZQ, Hu XS - J. Insect Sci. (2012)

Bottom Line: The results indicated that, the latter part of the reproduction period was significantly affected by Cd, according to the curve of the total survival rate (l(x)).In conclusion, survival and reproduction of S. avenae were inhibited under the treatment of the heavy metal Cd.Sitobion avenae was more sensitive to Cd at concentration of 20 mg/kg compared to the other concentrations.

View Article: PubMed Central - PubMed

Affiliation: Institute of Plant Protection, College of Plant Protection, Northwest Agriculture and Forest University, State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, Shaanxi 712100, China. gaohuanhuan368@126.com

ABSTRACT
The effects of cadmium (Cd) on the development, fecundity, and reproduction of the grain aphid, Sitobion avenae Fabricius (Hemiptera: Aphididae) were estimated by constructing a life table of S. avenae exposed to Cd. The concentrations of Cd in the soil were as follows: 0, 10, 20, 40, 80, and 160 mg/kg. The correlation analysis of the Cd concentration in soil and wheat revealed that the amount in the wheat increased with the increase of Cd concentrations in soil. The results indicated that, the latter part of the reproduction period was significantly affected by Cd, according to the curve of the total survival rate (l(x)). The net reproductive rate (R(0)), innate capacity of increase (r), and finite rate of increase (λ) of S. avenae all decreased under the stress of Cd, and were lowest at a Cd concentration of 20 mg/kg. Cd also negatively affected fecundity and m(x) (the number of offspring produced by an individual female). At 20 mg/kg, the decline of them was most obvious. In conclusion, survival and reproduction of S. avenae were inhibited under the treatment of the heavy metal Cd. Sitobion avenae was more sensitive to Cd at concentration of 20 mg/kg compared to the other concentrations. This concentration can be used to examine the mechanisms behind population genetics and biological mutation of S. avenae when exposed to heavy metal.

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Fecundity of adult Sitobion avenae with six levels of Cd treatment. Different letters (a–d) indicate a significant difference (SNK test: p < 0.05, following one-way ANOVA). High quality figures are available online.
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f03_01: Fecundity of adult Sitobion avenae with six levels of Cd treatment. Different letters (a–d) indicate a significant difference (SNK test: p < 0.05, following one-way ANOVA). High quality figures are available online.

Mentions: The mean fecundity of S. avenae with six levels of Cd treatment are shown in Figure 3. The total fecundity (mean ± SE) of S. avenae was 37.1 ± 3.2, 33.3 ± 2.7, 48.2 ± 4.0, 40.9 ± 3.0, and 42.8 ± 2.7 total offspring from 10 to 160 mg/kg of Cd treatments, all of which were significantly lower than the control (61.2 ± 4.7) (F5,17 = 27.150, p < 0.01). The value was lowest at 20 mg/kg Cd.


Life table evaluation of survival and reproduction of the aphid, Sitobion avenae, exposed to cadmium.

Gao HH, Zhao HY, Du C, Deng MM, Du EX, Hu ZQ, Hu XS - J. Insect Sci. (2012)

Fecundity of adult Sitobion avenae with six levels of Cd treatment. Different letters (a–d) indicate a significant difference (SNK test: p < 0.05, following one-way ANOVA). High quality figures are available online.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472964&req=5

f03_01: Fecundity of adult Sitobion avenae with six levels of Cd treatment. Different letters (a–d) indicate a significant difference (SNK test: p < 0.05, following one-way ANOVA). High quality figures are available online.
Mentions: The mean fecundity of S. avenae with six levels of Cd treatment are shown in Figure 3. The total fecundity (mean ± SE) of S. avenae was 37.1 ± 3.2, 33.3 ± 2.7, 48.2 ± 4.0, 40.9 ± 3.0, and 42.8 ± 2.7 total offspring from 10 to 160 mg/kg of Cd treatments, all of which were significantly lower than the control (61.2 ± 4.7) (F5,17 = 27.150, p < 0.01). The value was lowest at 20 mg/kg Cd.

Bottom Line: The results indicated that, the latter part of the reproduction period was significantly affected by Cd, according to the curve of the total survival rate (l(x)).In conclusion, survival and reproduction of S. avenae were inhibited under the treatment of the heavy metal Cd.Sitobion avenae was more sensitive to Cd at concentration of 20 mg/kg compared to the other concentrations.

View Article: PubMed Central - PubMed

Affiliation: Institute of Plant Protection, College of Plant Protection, Northwest Agriculture and Forest University, State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, Shaanxi 712100, China. gaohuanhuan368@126.com

ABSTRACT
The effects of cadmium (Cd) on the development, fecundity, and reproduction of the grain aphid, Sitobion avenae Fabricius (Hemiptera: Aphididae) were estimated by constructing a life table of S. avenae exposed to Cd. The concentrations of Cd in the soil were as follows: 0, 10, 20, 40, 80, and 160 mg/kg. The correlation analysis of the Cd concentration in soil and wheat revealed that the amount in the wheat increased with the increase of Cd concentrations in soil. The results indicated that, the latter part of the reproduction period was significantly affected by Cd, according to the curve of the total survival rate (l(x)). The net reproductive rate (R(0)), innate capacity of increase (r), and finite rate of increase (λ) of S. avenae all decreased under the stress of Cd, and were lowest at a Cd concentration of 20 mg/kg. Cd also negatively affected fecundity and m(x) (the number of offspring produced by an individual female). At 20 mg/kg, the decline of them was most obvious. In conclusion, survival and reproduction of S. avenae were inhibited under the treatment of the heavy metal Cd. Sitobion avenae was more sensitive to Cd at concentration of 20 mg/kg compared to the other concentrations. This concentration can be used to examine the mechanisms behind population genetics and biological mutation of S. avenae when exposed to heavy metal.

Show MeSH