Accès libre

Influence of Temperature on Susceptibility of CVS. Tifguard and Georgia-06G Peanut to Meloidogyne arenaria

Weimin Yuan
Weimin Yuan
, 
C. C. Holbrook
C. C. Holbrook
, 
Y. Chu
Y. Chu
, 
P. Ozias-Akins
P. Ozias-Akins
 et 
D. W. Dickson
D. W. Dickson
   | 31 mai 2018
Journal of Nematology's Cover Image
À propos de cet article
Article précédent
Article suivant
Citez
Article Category: research-article
Publié en ligne: 31 mai 2018
Pages: 33 - 40
Accepté: 27 juil. 2017
DOI: https://doi.org/10.21307/jofnem-2018-006
Mots clés
© 2018 Weimin Yuan et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Mean number of Meloidogyne arenaria in roots of Tifguard and Georgia-06G at 5-day intervals over a 30-day period in Experiment 1.
Mean number of Meloidogyne arenaria in roots of Tifguard and Georgia-06G at 5-day intervals over a 30-day period in Experiment 1.

Figure 2

Mean number of Meloidogyne arenaria in roots of Tifguard and Georgia-06G at 5-day intervals over a 40-day period in Experiment 2.
Mean number of Meloidogyne arenaria in roots of Tifguard and Georgia-06G at 5-day intervals over a 40-day period in Experiment 2.

Figure 3

Number of second-stage juveniles (J2) per gram of root system of the resistant cultivar Tifguard and the susceptible cultivar Georgia-06G 5 days after inoculation in Experiments 1 and 2. Different letters over bars from the same experiment indicate significant differences at P ≤ 0.05.
Number of second-stage juveniles (J2) per gram of root system of the resistant cultivar Tifguard and the susceptible cultivar Georgia-06G 5 days after inoculation in Experiments 1 and 2. Different letters over bars from the same experiment indicate significant differences at P ≤ 0.05.

Figure 4

Number of Meloidogyne arenaria second-stage juveniles (J2) and females 30 days after inoculation (Experiment 1), and J2, females, and egg-laying females 40 days after inoculation (Experiment 2) on Tifguard .
Number of Meloidogyne arenaria second-stage juveniles (J2) and females 30 days after inoculation (Experiment 1), and J2, females, and egg-laying females 40 days after inoculation (Experiment 2) on Tifguard .

Figure 5

Number of egg-laying females per gram of roots of the resistant cultivar Tifguard and susceptible cultivar Georgia-06G at 30 or 40 days after inoculation in Experiments 1 and 2, respectively. Bars followed by different letters from the same experiment indicate significant differences at P ≤ 0.05.
Number of egg-laying females per gram of roots of the resistant cultivar Tifguard and susceptible cultivar Georgia-06G at 30 or 40 days after inoculation in Experiments 1 and 2, respectively. Bars followed by different letters from the same experiment indicate significant differences at P ≤ 0.05.

Figure 6

Mature egg-laying females and necrotic lesions formed around Meloidogyne arenaria infection sites in Tifguard roots. A. Mature females at 35 days after inoculation (DAI) at 34°C; B. Egg-laying female at 40 DAI at 34°C (arrow points to egg mass); C. Arrow points to necrotic lesion at 5 DAI; D. Arrow points to necrotic lesion at 40 DAI.
Mature egg-laying females and necrotic lesions formed around Meloidogyne arenaria infection sites in Tifguard roots. A. Mature females at 35 days after inoculation (DAI) at 34°C; B. Egg-laying female at 40 DAI at 34°C (arrow points to egg mass); C. Arrow points to necrotic lesion at 5 DAI; D. Arrow points to necrotic lesion at 40 DAI.

Figure 7

Number of Meloidogyne arenaria eggs per egg mass from roots of the peanut cultivars Tifguard (resistant) and Georgia-06G (susceptible) at 34°C at 40 days after inoculation. Different letters over bars indicate significant differences at P ≤ 0.05.
Number of Meloidogyne arenaria eggs per egg mass from roots of the peanut cultivars Tifguard (resistant) and Georgia-06G (susceptible) at 34°C at 40 days after inoculation. Different letters over bars indicate significant differences at P ≤ 0.05.

Analysis of variance of root weight, number of Meloidogyne arenaria per gram of roots of peanut cultivars Georgia 06G and Tifguard.

Source of variance F value
Root weight
Cultivar 2.744e-06 ***
Temperature 0.6528
DAIa <2.2e-16 ***
Cultivar × Temperature 0.7204
Cultivar × DAI 1.896e-08 ***
Temperature × DAI 0.8505
Cultivar × Temperature × DAI 0.7657
M. arenaria per gram of roots Experiment 1
Cultivar 0.0009106 ***
Temperature 0.0059029 **
DAI <2.2e-16 ***
Cultivar × Temperature 0.0374213 *
Cultivar × DAI 0.0005185 ***
Temperature × DAI 4e-07 ***
Cultivar × Temperature × DAI 0.0197020 *
M. arenaria per gram of roots Experiment 2
Cultivar 6.651e-07 ***
Temperature 0.0001727 ***
DAI <2.2e-16 ***
Cultivar × Temperature 0.0109771 *
Cultivar × DAI 3.001e-09 ***
Temperature × DAI <2.2e-16 ***
Cultivar × Temperature × DAI 6.126e-06 ***
eISSN:
2640-396X
Langue:
Anglais
Périodicité:
Volume Open
Sujets de la revue:
Life Sciences, other
RSS Feed de la revue