Description of Pratylenchus elamini Zeidan & Geraert, 1991 isolated from grass rhizosphere in Iran

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Hosseinvand M.; Ganjkhanloo S.; ESKANDARI A.

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Journal: IRANIAN JOURNAL OF PLANT PATHOLOGY Year:2020 | Volume:56 | Issue:1 Page(s): 119-123

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Title

Description of Pratylenchus elamini Zeidan & Geraert, 1991 isolated from grass rhizosphere in Iran

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Hosseinvand M. | Ganjkhanloo S. | ESKANDARI A. | Issue Writer Certificate

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Abstract

During the study of plant parasitic nematodes in grasslands of Zanjan province, one species of root lesion nematodes was isolated from soil around the roots of grass in Ijrud county that after morphologic and morphometric observations was identified as Pratylenchus elamini. Female: Vermiform nematodes, body slightly arcuate ventrally after killing and fixation or stabilized in various C, U and S shapes; cuticular annuli minute, 1. 0 μ m apart in mid body, lateral fields with four or sometimes five incisures, 4. 2 (3. 4-5. 0) μ m or 25 (20-35) % of body width at midbody, outer bands across with transvers grooves, without additional oblique lines between the lateral fields; head low and truncate, continuous with body contour, with three transverse annuli, 2. 5 (2. 3-2. 8) μ m high and 7. 7 (7. 2-8. 5) μ m wide at the base, head framework refractive, extended into the body about one or two body annuli; stylet strong, conus 50. 6 (47. 5-54) % of total stylet length, knobs rounded, 3. 5 (2. 5-4. 5) μ m in wide, DGO located at 2. 8 (2. 2-3. 5) μ m behind stylet knobs; median bulb ovate with distinct valve, 12 (10-13. 5) μ m in length that occupied 62 (47-69) % of body width; nerve ring at 64 (55-71) μ m and excretory pore at 72 (53-82) μ m from anterior end, hemizonid one to three annuli anterior to excretory pore; pharynx glands overlapping with intestine, 47 (36-57) μ m; reproduction system monoprodelphic, spermatheca small, slightly ovate, without sperm, in line with reproduction system, vagina 5 (4. 0-6. 3) μ m or 33. 5 (27-44) % of vulva body width, post vulva sac about 1. 9 (1. 2-2. 7) vulval body width long; tail sub-cylindroid, tip conical and smooth, with 20 (16-25) annuli at ventral side, phasmid located approximately at middle or 48 (43-55) % of tail length (Fig. 1). Male: Not found. Pratylenchus elamini is close to P. kralli Ryss, 1982; P. sudanensis Loof & Yassin, 1971; P. vulnus Allen & Jensen, 1951 and P. thornei Sher & Allen, 1953. P. elamini differs from P. kralli by shorter stylet length (13-14. 5 μ m vs. 14-15 μ m), longer post vulval uterine sac (1. 5-2. 9 times as vulval body diameter vs. 1. 5 times as vulval body diameter), absence of male and empty spermatheca vs. presence of male and filled spermatheca. From P. sudanensis differs by shorter stylet length (13-14. 5 μ m vs. 14-16 μ m), longer post vulval uterine sac (1. 5-2. 9 times as vulval body diameter vs. 1. 0-1. 5 times as vulval body diameter), absence of male and empty spermatheca vs. presence of male and filled spermatheca. From P. vulnus differs by anterior position of vulva (72-77% vs. 77-82%), absence of male and empty spermatheca vs. presence of male and filled spermatheca. From P. thornei differs by shorter body length (330-510 μ m vs. 410-770 μ m), shorter stylet length (13-14. 5 μ m vs. 15-19 μ m) and longer post vulval uterine sac (1. 5-2. 9 times as vulval body diameter vs. 0. 8-1. 5 times as vulval body diameter). Our population was identified using Geraert diagnostic key (2013) as Pratylenchus elamini and agree well for most of the morphometrics and morphological aspects with the original description. This species has been originally described from Sudan by Zeidan & Geraert (1991). Rashno Bone Abbasi et al., (2018) only mentioned to Pratylenchus elamini name in list of identified species associated with citrus orchards in Dezful and Andimesk. In present study this species identified in rhizosphere of grass in Ijrud, Zanjan province and described for the first time from Iran.

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APA: Copy

Hosseinvand, M., Ganjkhanloo, S., & ESKANDARI, A.. (2020). Description of Pratylenchus elamini Zeidan & Geraert, 1991 isolated from grass rhizosphere in Iran. IRANIAN JOURNAL OF PLANT PATHOLOGY, 56(1 ), 119-123. SID. https://sid.ir/paper/404320/en

Vancouver: Copy

Hosseinvand M., Ganjkhanloo S., ESKANDARI A.. Description of Pratylenchus elamini Zeidan & Geraert, 1991 isolated from grass rhizosphere in Iran. IRANIAN JOURNAL OF PLANT PATHOLOGY[Internet]. 2020;56(1 ):119-123. Available from: https://sid.ir/paper/404320/en

IEEE: Copy

M. Hosseinvand, S. Ganjkhanloo, and A. ESKANDARI, “Description of Pratylenchus elamini Zeidan & Geraert, 1991 isolated from grass rhizosphere in Iran,” IRANIAN JOURNAL OF PLANT PATHOLOGY, vol. 56, no. 1 , pp. 119–123, 2020, [Online]. Available: https://sid.ir/paper/404320/en

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