Effect of pH, Oxygen and Temperature On the Activity and Survival of Hirschmanniella Spp

Babatola, J. O.

doi:10.1163/187529281x00511

Cited by 13 publications

(9 citation statements)

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“…In addition, the soil is inhabited by bacteria which may be harmful to nematodes (Costa et al ., ; Hodgkin et al ., ; Piskiewicz et al ., ). Hirschmanniella oryza e has been reported to survive in anaerobic conditions (Babatola, ). We only detected the presence of a few genes coding for enzymes that are important in anaerobic metabolism pathways, such as fumarate reductase and malate dehydrogenase, but not enough to construct a full pathway (Muller et al ., ).…”

Section: Discussionmentioning

confidence: 99%

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Analysis of the transcriptome of Hirschmanniella oryzae to explore potential survival strategies and host–nematode interactions

Bauters

Haegeman

Kyndt

et al. 2013

Molecular Plant Pathology

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The rice root nematode Hirschmanniella oryzae is the most abundant plant-parasitic nematode in flooded rice fields and is distributed world-wide. Although it is economically less important than sedentary nematodes, it can cause severe yield reductions and economic losses in specific environmental conditions. No transcriptome data for this genus were available until now. We have performed 454 sequencing on a mixed life stages population to gain an insight into nematode-plant interactions and nematode survival strategies. The results of two assembly strategies were combined to reduce the redundancy of the data, generating a final dataset of 21 360 contigs. The data were screened for putative plant cell wall-modifying proteins, which facilitate nematode migration through host roots. A β-mannanase, previously not reported in nematodes, was detected in the dataset. The data were screened for putative effector proteins that may alter the host defence mechanism. Two enzymes, chorismate mutase and isochorismatase, thought to be involved in the salicyclic acid pathway, were identified. Experimental treatments of H. oryzae with artificial seawater showed that late embryogenesis abundant (LEA) proteins and SXP/RAL-2 are induced, suggesting that these proteins are involved in the process of anhydrobiosis. The newly generated data can highlight potential differences between sedentary and migratory nematodes, and will be useful in the further study of host-nematode interactions and the developmental biology of this nematode.

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Section: Discussionmentioning

confidence: 99%

“…Hirschmanniella oryzae is the most common nematode in flooded rice ecosystems all over the world (Prot and Rahman, ). The nematode is adapted to anaerobic conditions and this makes it the most abundant nematode species in these ecosystems (Babatola, ; Maung et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the transcriptome of Hirschmanniella oryzae to explore potential survival strategies and host–nematode interactions

Bauters

Haegeman

Kyndt

et al. 2013

Molecular Plant Pathology

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“…In general, Hirschmanniella species are unusual nematodes since they are perfectly adapted to the constantly flooded conditions in which irrigated rice is often grown in the lowlands (Fortuner & Memy, 1979). Hirschmanniella is one of the few plant-parasitic nematodes that can survive anaerobic conditions (Babatola, 1981). Worldwide, H. oryzae is considered to be the most common plantparasitic nematode on irrigated rice, especially when the plants are constantly flooded (Prot & Rahman, 1994;Bridge et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Population dynamics of Meloidogyne graminicola and Hirschmanniella oryzae in a double rice-cropping sequence in the lowlands of Myanmar

Win¹,

Kyi

Maung³

et al. 2013

Nematol

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The rice root-knot nematode, Meloidogyne graminicola, and the rice root nematode, Hirschmanniella oryzae, are considered potentially important nematode pathogens in lowland rice. A study was undertaken from December 2009 until December 2010 in the Ayeyarwady River Delta, the major lowland rice-producing area of Myanmar, to monitor the population dynamics of M. graminicola and H. oryzae in a naturally infested field. Root samples of the two rice varieties Yatanartoe and Taungpyan that are commonly cultivated in double rice-cropping sequences in Myanmar and represent irrigated and rainfed lowland rice varieties, respectively, were obtained for nematode analysis. During the summer-irrigated rice-growing season the root population density of second-stage juveniles (J2) of M. graminicola showed two distinct peaks -at the maximum tillering stage of the rice plants in January and at the heading stage of the rice plants in March 2010. With the onset of the monsoon rains, the J2 population densities in the roots of ratoon rice plants gradually decreased in May. During the rainfed monsoon rice-growing season, very low population densities of M. graminicola J2 were detected in the roots of rice plants, while the root population density of H. oryzae juveniles and adults showed two distinct peaks -at the maximum tillering stage of the rice plants in August and at the heading stage of the rice plants in October 2010. With the onset of the dry season, population density ofH. oryzae in the roots reached the lowest density at harvest in November. Root galling caused by M. graminicola followed the same trend as the J2 population densities throughout the irrigated season. No root galls were observed during the monsoon season. Our results can be used for practical purposes aimed at a better management of both M. graminicola and H. oryzae.

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“…This nematode is perfectly adapted to the constant flooded conditions in which irrigated rice is often being grown in the lowlands (Fortuner & Merny, 1979). It is one of the few plant-parasitic nematode species that can survive under anaerobic conditions (Babatola, 1981). In addition to Myanmar where there are indications that H. oryzae is widely spread in some rice producing areas, H. oryzae has also been reported on rice in other Asian countries such as India, Pakistan, Bangladesh, Sri Lanka, Nepal, Thailand, Vietnam, Indonesia, the Philippines, China, Korea and Japan (Bridge et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Occurrence of the rice root nematode Hirschmanniella oryzae on monsoon rice in Myanmar

Maung¹,

Kyi²,

Myint³

et al. 2010

Trop. plant pathol.

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During May-October 2007, soil and root samples from 539 fields were collected from 11 monsoon rice varieties in 12 regions in Myanmar. All regions surveyed and 90% of fields sampled were infested with the rice root nematode Hirschmanniella oryzae. The average H. oryzae population was 10/100 mL soil and 419/20 g roots respectively. In 6.9% of the fields sampled 50 H. oryzae/g root were found. The average root population densities were the highest (640/20 g roots) in Taungpyan variety and the lowest (155/20 g roots) in Immayebaw variety. The lowest soil and the second-lowest root populations of H. oryzae were observed in Shwethweyin which may indicate that this rice variety is less susceptible to H. oryzae. Among three cropping sequences, the highest frequency of occurrence (94%) was found in the rice-rice cropping sequence. Based on the prominence value (a combination of the frequency of occurrence and abundance) of H. oryzae, Hlaingtharyar was the most infested region where susceptible rice varieties are grown and rice-rice cropping sequence is practiced. The rice production in this region may be the most at risk of suffering important yield losses due to H. oryzae

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Effect of pH, Oxygen and Temperature On the Activity and Survival of Hirschmanniella Spp

Cited by 13 publications

References 0 publications

Analysis of the transcriptome of Hirschmanniella oryzae to explore potential survival strategies and host–nematode interactions

Analysis of the transcriptome of Hirschmanniella oryzae to explore potential survival strategies and host–nematode interactions

Population dynamics of Meloidogyne graminicola and Hirschmanniella oryzae in a double rice-cropping sequence in the lowlands of Myanmar

Occurrence of the rice root nematode Hirschmanniella oryzae on monsoon rice in Myanmar

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