Description of a Foliar Nematode, Aphelenchoides fragariae (Nematoda: Aphelenchida) with Additional Characteristics from Korea

2007 ◽  
Vol 10 (4) ◽  
pp. 313-315 ◽  
Author(s):  
Zakaullah Khan ◽  
Seon-Hye Son ◽  
Hyo Sun Moon ◽  
Sang Gyu Kim ◽  
Hyeon-Dong Shin ◽  
...  
Keyword(s):  
Aphelenchoides Fragariae ◽  
Foliar Nematode

scholarly journals First Reports of Aphelenchoides fragariae on Royal Fern and on Hosta and Other Hosts in South Carolina

Plant Disease ◽  
2000 ◽  
Vol 84 (5) ◽  
pp. 593-593 ◽  
Author(s):  
M. R. Williamson ◽  
J. H. Blake ◽  
S. N. Jeffers ◽  
S. A. Lewis
Keyword(s):  
South Carolina ◽  
Ornamental Plants ◽  
Botanical Garden ◽  
The South ◽  
Clemson University ◽  
First Report ◽  
Symptomatic Leaf ◽  
Aphelenchoides Fragariae ◽  
Foliar Nematode

In September 1999, royal ferns (Osmunda regalis L.) at a South Carolina wholesale nursery were found to be infected by foliar nematodes. Lesions were brown, vein-limited, and often fan shaped. As severity increased, affected leaflets became totally necrotic. Nematodes were extracted by excising and dicing symptomatic leaf sections and placing them in water for up to 24 h. Ten adult nematodes from each of two fern plants were examined microscopically and determined to be Aphelenchoides fragariae (Ritzema Bos) Christie. This is the first report of this nematode infecting royal fern. In August 1996, leaves from several cultivars of Hosta spp. with yellow to tan, vein-limited lesions were submitted from The South Carolina Botanical Garden (Clemson, SC) to the Clemson University Plant Problem Clinic for diagnosis. Nematodes were extracted and examined as described above and identified as A. fragariae. This is the first report of this nematode infecting Hosta spp. in South Carolina. Since 1996, foliar nematodes have been recovered from hostas at several wholesale nurseries in South Carolina. Aphelenchoides spp. also have been detected previously in commercially produced ornamental plants in South Carolina, including a Begonia sp. in 1988; Polygonum bistorta L. ‘Super-bum’ (snakeweed) in 1997; and a Polystichum sp. (holly fern) in 1997. All plants exhibited angular or vein-limited, necrotic lesions typical of foliar nematode infections.

scholarly journals Foliar Nematode Aphelenchoides spp. (Nematoda: Aphelenchida: Aphelenchoididae)

EDIS ◽  
2020 ◽  
Vol 2020 (3) ◽  
Author(s):  
Lindsay Wheeler ◽  
William Talmadge Crow
Keyword(s):  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Plant Feeding ◽  
Plant Parasites ◽  
Aphelenchoides Besseyi ◽  
The Common ◽  
Aphelenchoides Fragariae ◽  
Foliar Nematode ◽  
Plant Parasitic ◽  
Aphelenchoides Ritzemabosi

There are nematodes of several genera that feed on plant stems and foliage, including Aphelenchoides, Bursaphelenchus, Anguina, Ditylenchus and Litylenchus. Herein, we apply the common name “foliar nematode” specifically to plant-feeding nematodes in the genus Aphelechoides, specifically Aphelenchoides besseyi, Aphelenchoides fragariae, and Aphelenchoides ritzemabosi. While most members of Aphelenchoides are fungivorous (feed on fungi), these three species have populations that are facultative plant-parasites that can feed on live plant tissue. Ten other species of Aphelenchoides also are recognized as facultative plant-parasites, but these are not as commonly encountered or as economically significant as the aforementioned species. Unlike most plant-parasitic nematodes, foliar nematodes can infest the aerial portions of plants rather than dwelling strictly in soil and plant roots. Damage from their feeding can reduce yield in food crops and ruin the appearance of ornamentals.https://edis.ifas.ufl.edu/in1279

scholarly journals Morphological and molecular characteristics of foliar nematode attacking silver birch (Betula pendula Roth) in Poland

2017 ◽  
Vol 54 (3) ◽  
pp. 250-256 ◽  
Author(s):  
A. Chałańska ◽  
A. Bogumił ◽  
G. Winiszewska ◽  
K. Kowalewska ◽  
T. Malewski
Keyword(s):  
Betula Pendula ◽  
Silver Birch ◽  
Molecular Characteristics ◽  
Perennial Plant ◽  
Source Of Infection ◽  
Rdna Sequences ◽  
Morphological Diagnosis ◽  
28S Rdna Sequences ◽  
Aphelenchoides Fragariae ◽  
Foliar Nematode

SummaryAphelenchoides fragariae (Ritzema Bos, 1890) Christie, 1932 was isolated from leaves of silver birch (Betula pendula Roth) seedlings proving that the source of infection was anemones plants. This is the first report to our best knowledge showing that the source of nematode infection of a woody plant could be a perennial plant. A. fragariae was identified by morphometric and molecular analyses. Morphological diagnosis based on the bending shape of the tail of males and pronounced apex and rostrum proved to be the most accurate reliable characteristic. On the opposite, the high variability of the mucron shape in female tails made the identification by microscopic analyses difficult. Identification of the species was confirmed by analysis of 28S rDNA sequences. The morphometric data of adults extracted from silver birch was compared with that of nematodes isolated from Anemone hupehensis (Lemoine) Lemoine. Males body length varied highly in samples collected from both host plant species.

scholarly journals Differential Expression of a β-1,4-Endoglucanase Induced by Diet Change in the Foliar Nematode Aphelenchoides fragariae

2012 ◽  
Vol 102 (8) ◽  
pp. 804-811 ◽  
Author(s):  
Zhen Fu ◽  
Paula Agudelo ◽  
Christina E. Wells
Keyword(s):  
Body Size ◽  
Glycosyl Hydrolase ◽  
Diet Change ◽  
Related Gene ◽  
Glycosyl Hydrolase Family ◽  
Plant Parasitism ◽  
Fungus Culture ◽  
Aphelenchoides Fragariae ◽  
Foliar Nematode ◽  
Hydrolase Family

We identified and characterized a β-1,4-endoglucanase, Afr-ENG-1, in the foliar nematode Aphelenchoides fragariae that is differentially expressed when the nematode feeds on fungi or plants. When individuals from hosta plants were transferred to a fungus culture, expression of the enzyme decreased 1,812-fold after five generations on the fungus diet. Afr-eng-1 was readily detected in the genome of 75% of nematodes from the plant population but only in 38% of the diet-changed population. The gene cannot be detected in nematodes maintained on fungus for over 100 generations. Diet was also associated with changes in nematode body size and in the severity of symptoms caused on hosta leaves. Plant-diet nematodes caused larger lesions and were longer and thinner than fungus-diet nematodes. Nematodes moved from a plant diet to a fungus diet for five generations had the same body size as the nematodes that had fed on the fungus for 100 generations. Full-length sequences of Afr-eng-1 were obtained and found to encode a glycosyl hydrolase family 5 protein. This is the first β-1,4-endoglucanase and plant-parasitism-related gene described in the genus Aphelenchoides.

Sign in / Sign up

Export Citation Format

Share Document