• Corpus ID: 6341592

Histological Studies of Ditylenchus africanus Within Peanut Pods.

@article{Venter1995HistologicalSO,
  title={Histological Studies of Ditylenchus africanus Within Peanut Pods.},
  author={Cheryl Venter and G van Aswegen and A. J. Meyer and D De Waele},
  journal={Journal of nematology},
  year={1995},
  volume={27 3},
  pages={
          284-91
        }
}
Ditylenchus africanus entered the immature pegs and pods of peanut (Arachis hypogaea cv. Sellie) at the peg-connection and subsequently invaded the parenchymatous regions of the hull exocarp and endocarp, and eventually the seed testa. The nematode caused malformations of the cells of infected tissues, cell wall breakage, and cell collapse. The damage appeared to be due to enzymatic activity. In some testae the entire parenchyma region, which aids in protection of the seed, was destroyed. In… 

Figures from this paper

Differential responses of resistant and susceptible groundnut genotypes at cellular level to Ditylenchus africanus
TLDR
The mechanism of resistance involved may be the inhibition of proper development, migration and reproduction of this nematode, thus preventing it building up to damaging population levels, according to results of this study.
Reproduction and Damage Potential of Five Geographical Ditylenchus africanus Populations on Peanut
TLDR
Reproduction potential of all five of the D. africanus geographic populations from five different areas in the peanut production area of South Africa were compared and Resistance of PC254K1 was confirmed to all five D. Africanus populations.
Resistance to Ditylenchus africanus present in peanut breeding lines.
TLDR
The breeding line PC287K5 maintained low nematode numbers in some trials, but its level of resistance was not as strong or as sustainable as that of PC254K1 or CG7, but it could still play an important role in the peanut industry where lower D. africanus populations occur.
Nematode Pests of Leguminous and Oilseed Crops
TLDR
Although nematode research focused mainly on groundnut and soybean, information for Bambara groundnut, cowpea, dry bean, lupin and sunflower is presented, and of particular interest are discussions on root-knot nematodes resistance breeding in soybean and the development of molecular markers to expedite the breeding process.
A study of the systematics and implications of the presence of the testa nematode, Aphelenchoides arachidis Bos, 1977 in South Africa
TLDR
The present study showed that A. arachidis was found predominantly in the shells of groundnut, whereas they were found in theshells, roots, hypocotyls and testas of the groundnut plants in Nigeria, a characteristic that predisposes these plants to a host of pathogens.
Challenges in tropical plant nematology.
TLDR
The study of interactions between nematodes and other pathogens in disease complexes provide opportunities for multidisciplinary research with scientists from other disciplines but remain underexploited.

References

SHOWING 1-10 OF 16 REFERENCES
Histopathology of Ditylenchus destructor on Peanut.
TLDR
The time and mode of entry, and development of Ditylenchus destructor in peanut were studied in field and greenhouse experiments and Nematodes were found in the embryo but not in the cotyledons.
Ditylenchus destructor in Hulls and Seeds of Peanut.
The potato rot nematode, Ditylenchus destructor Thorne, is reported for the first time in hulls and seeds of peanut. The populations found differed from D. dipsaei and D. myceliophagus in habitat,
Survival of Ditylenchus destructor in soil, hulls and seeds of groundnut.
TLDR
The results show that the freshness of the tissues played an important role in the efficiency of the soaking method : stored hulls and seeds must be soaked longer than 24 h to make a reliable estimate of the number of nematodes present.
Reproductive and Damage Potential of Ditylenchus destructor on Peanut.
The reproductive and damage potential of Ditylenchus destructor on peanut, Arachis hypogaea cv. Sellie, was determined in greenhouse tests. Final nematode population densities (Pf) in roots, hulls,
Population Dynamics of Ditylenchus destructor on Peanut.
TLDR
The population development of Ditylenchus destructor in the roots, pegs, hulls, and seeds of eight peanut genotypes was studied in the greenhouse and differences in host suitability were observed.
Effect of Host Plant Age on Population Development and Pathogenicity of Ditylenchus destructor on Peanut.
TLDR
It is suggested that as few as 500 nematodes per plant at 12 weeks after planting can build up to injurious levels before harvest and a nematicide should be active for longer than 12 weeksAfter planting to sufficiently suppress the population.
Reproductive and Damage Potential of Ditylenchus destructor on Six Peanut Cultivars.
TLDR
Commercial peanut cultivars were evaluated for host suitability and sensitivity to Ditylenchus destructor and Sellie was the most tolerant and highest yielding cultivar.
Ditylenchus africanus sp. n. from South Africa; a morphological and molecular characterization.
A new Ditylenehus species from South Africa that parasitizes peanut is described based on characteristics of morphology and restriction fragment length polymorphisms (RFLPs) of ribosomaJ DNA (rDNA).
Effects of Specimen Preparation on the Apparent Ultrastructure of Microorganisms
TLDR
Among the many useful protocols for traditional processing of specimens, the procedures recommended by Ito and Rikihisa (1981) are consistently effective for preserving the ultrastructure of both microorganisms and host cells.
...
...