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

Journal of Nematology
Volume 55 (2023): Issue 1 (February 2023)
By:
Open Access
|Feb 2023

Figures & Tables

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 potRoot-knot Index (RKI)Final Nematode Population (g-1 soil) (Pf)Reproduction Factor (RF= Pf / Pi)
000.0 ± 0.00f0.0 ± 0.00i0.00 ± 0.00f
0.1251250.6 ± 0.24e1.20 ± 0.20i9.60 ± 1.60d
0.2502501.4 ± 0.24d2.80 ± 0.48i11.20 ± 1.95cd
0.55001.8 ± 0.20d9.60 ± 1.32h19.20 ± 2.65b
110002.4 ± 0.24c19.80 ± 0.66g19.80 ± 0.66b
220003.4 ± 0.24b63.20 ± 1.98d31.60 ± 0.99a
440004.4 ± 0.24a52.40 ± 1.83e13.10 ± 0.45c
880004.6 ± 0.24a136.80 ± 1.98a17.09 ± 0.49b
16160004.8 ± 0.20a92.60 ± 1.501b5.78 ± 0.10e
32320005.0 ± 0.00a39.20 ± 1.82f1.22 ± 0.05f
64640005.0 ± 0.00a55.00 ± 1.58e0.85 ± 0.02f
1281280005.0 ± 0.00a71.00 ± 3.75c0.55 ± 0.02f
ANOVA TEST
df 111111
SS 192.8975004252
MS 17.528864386.5
F 95.6592.2293.6
P 0.010.020.02
DOI: https://doi.org/10.2478/jofnem-2023-0005 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X
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Language: English
Submitted on: Aug 21, 2022
Published on: Feb 28, 2023
Published by: Society of Nematologists, Inc.
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year
Keywords:
Fenugreek,
Reproduction factor,
Root-knot nematode,
Threshold level,
Host-parasitic relationship
Related subjects:
Life sciences,
Life sciences, other

© 2023 Hera Nadeem, Amir Khan, Rishil Gupta, Arshi Anees, Faheem Ahmad, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

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