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A Seinhorst Model Determined the Host-Parasite Relationships of Meloidogyne javanica Infecting Fenugreek cv. UM202

Hera Nadeem
Hera Nadeem
, 
Amir Khan
Amir Khan
, 
Rishil Gupta
Rishil Gupta
, 
Arshi Anees
Arshi Anees
 and 
Faheem Ahmad
Faheem Ahmad
   | Feb 28, 2023
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Article Category: Research Paper
Published Online: Feb 28, 2023
Page range: -
Received: Aug 21, 2022
DOI: https://doi.org/10.2478/jofnem-2023-0005
Keywords
© 2023 Nadeem et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Scanning electron microscopy (SEM) images of the perineal pattern of M. javanica, which show a rounded to flattened dorsal arch and conspicuous lateral lines that separate the dorsal and ventral regions of the patterns. (A) A close view of the distinct lateral line in a perineal pattern distinguishes this species from other Meloidogyne spp. (B) An inner area was marked by coarsely broken striae and contained the vulva and anus.
Scanning electron microscopy (SEM) images of the perineal pattern of M. javanica, which show a rounded to flattened dorsal arch and conspicuous lateral lines that separate the dorsal and ventral regions of the patterns. (A) A close view of the distinct lateral line in a perineal pattern distinguishes this species from other Meloidogyne spp. (B) An inner area was marked by coarsely broken striae and contained the vulva and anus.

Figure 2

Effect of increasing nematode population densities (from 0.125 on the left to 128 J2s g-1 soil on the right) of M. javanica on the growth of fenugreek cv. UM-202, showing a reduction in plant growth. Symptoms of nematode attack (a marked reduction of plant growth) were evident at the Pi level of 8 J2s g-1 soil. However, the tolerance limits (T) of fenugreek plant shoot length were 1.3 J2s g-1 soil.
Effect of increasing nematode population densities (from 0.125 on the left to 128 J2s g-1 soil on the right) of M. javanica on the growth of fenugreek cv. UM-202, showing a reduction in plant growth. Symptoms of nematode attack (a marked reduction of plant growth) were evident at the Pi level of 8 J2s g-1 soil. However, the tolerance limits (T) of fenugreek plant shoot length were 1.3 J2s g-1 soil.

Figure 3

Relationship between initial population densities (Pi) of M. javanica and relative shoot length (A) and relative shoot dry weights (B) of fenugreek cv. UM-202, grown in pots under glasshouse conditions for 90 days. Each point represents the average of four replicated plants. Lines represent the predicted function calculated by fitting the Seinhorst model to data using the SeinFit program. Statistics for fitted models of shoot length and shoot dry weight were R2 = 0.90, sum of squares (SS) = 0.12; and R2 = 0.92, SS = 0.072, respectively.
Relationship between initial population densities (Pi) of M. javanica and relative shoot length (A) and relative shoot dry weights (B) of fenugreek cv. UM-202, grown in pots under glasshouse conditions for 90 days. Each point represents the average of four replicated plants. Lines represent the predicted function calculated by fitting the Seinhorst model to data using the SeinFit program. Statistics for fitted models of shoot length and shoot dry weight were R2 = 0.90, sum of squares (SS) = 0.12; and R2 = 0.92, SS = 0.072, respectively.

Relationship between the initial population of Meloidogyne javanica and root-knot index, final population density, reproduction factor in fenugreek cv. UM-202, 90 days after inoculation.

Initial Nematode Population (Pi) (g-1 soil) Nematode Population (P) per pot Root-knot Index (RKI) Final Nematode Population (g-1 soil) (Pf) Reproduction Factor (RF= Pf / Pi)
0 0 0.0 ± 0.00f 0.0 ± 0.00i 0.00 ± 0.00f
0.125 125 0.6 ± 0.24e 1.20 ± 0.20i 9.60 ± 1.60d
0.250 250 1.4 ± 0.24d 2.80 ± 0.48i 11.20 ± 1.95cd
0.5 500 1.8 ± 0.20d 9.60 ± 1.32h 19.20 ± 2.65b
1 1000 2.4 ± 0.24c 19.80 ± 0.66g 19.80 ± 0.66b
2 2000 3.4 ± 0.24b 63.20 ± 1.98d 31.60 ± 0.99a
4 4000 4.4 ± 0.24a 52.40 ± 1.83e 13.10 ± 0.45c
8 8000 4.6 ± 0.24a 136.80 ± 1.98a 17.09 ± 0.49b
16 16000 4.8 ± 0.20a 92.60 ± 1.501b 5.78 ± 0.10e
32 32000 5.0 ± 0.00a 39.20 ± 1.82f 1.22 ± 0.05f
64 64000 5.0 ± 0.00a 55.00 ± 1.58e 0.85 ± 0.02f
128 128000 5.0 ± 0.00a 71.00 ± 3.75c 0.55 ± 0.02f
ANOVA TEST
df 11 11 11
SS 192.8 97500 4252
MS 17.52 8864 386.5
F 95.6 592.2 293.6
P 0.01 0.02 0.02
eISSN:
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Language:
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Journal Subjects:
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