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Kabacan, Philippines

The University of Southern Mindanao, formerly Mindanao Institute of Technology , is a university in the Southern Philippines. It provides instruction and professional training in the fields of science and technology, particularly agriculture and industry. The university was founded by Bai Hadja Fatima Matabay Plang, an educator and philanthropist. It formally open on October 1, 1954, and achieved university status on March 13, 1978. Its 1,024 hectare main campus is located in Kabacan, Cotabato. The University of Southern Mindanao is one of the four State University and Colleges to achieve excellence in agricultural education and one of the nine to hold Level IV status. Across its 3 campuses USM holds a total of 5, 129.97 hectares of land, mostly for agricultural teaching and reseach. Wikipedia.

Cabasan M.T.N.,Catholic University of Leuven | Cabasan M.T.N.,International Rice Research Institute | Cabasan M.T.N.,University of Southern Mindanao | Fernandez L.,International Rice Research Institute | And 3 more authors.
Archives of Phytopathology and Plant Protection

The host response of 25 rice genotypes belonging to Oryza glaberrima and Oryza sativa to Meloidogyne graminicola infection was examined in a hydroponic system. The M. graminicola can build up high population densities in a hydroponic system. Resistance to this nematode species was found in O. glaberrima genotypes which supported significantly lower nematode numbers per plant and per unit root than O. sativa genotypes. The M. graminicola-infected O. sativa genotypes showed a higher root galling index than the O. glaberrima genotypes. The hydroponic system is efficient and reliable method to examine the host response of rice genotypes to M. graminicola infection, and can be useful for the fast screening of high numbers of rice genotypes for the selection of M. graminicola-resistant rice germplasm for breeding purposes. © 2016 Taylor & Francis Source

Kumar A.,International Rice Research Institute | Bellafiore S.,IRD Montpellier | Cabasan M.T.N.,Catholic University of Leuven | Cabasan M.T.N.,University of Southern Mindanao | And 4 more authors.

The root-knot nematode, Meloidogyne graminicola, can cause substantial rice yield losses. Understanding the mechanisms of resistance to this nematode species in known resistant rice genotypes may help to improve rice genotypes, aiming at developing and implementing environment-friendly and cost-effective nematode management strategies. Using susceptible and resistant rice genotypes, a comparative analysis of histological response mechanisms was made during two phases of the nematode colonisation: i) root penetration; and ii) subsequent establishment and development by M. graminicola second-stage juveniles (J2). Two types of defence response mechanisms could be distinguished in the resistant rice genotypes. The early defence response consisted of a hypersensitive response (HR)-like reaction in the early stage of infection characterised by necrosis of cells directly affected by nematode feeding. This HR-like reaction was observed only in the M. graminicola-resistant Oryza glaberrima genotypes and not in the M. graminicolasusceptible O. sativa genotypes. The late defence response took place after the induction of giant cells by the J2. Giant cells usually collapsed and degenerated before J2 developed into adults. Structural features of the roots of the susceptible O. sativa showed greater root and stele diam. and cortex thickness than the resistant O. glaberrima genotypes. Desired features of plants with resistance to M. graminicola elucidated in this study can be used for selection of plants for breeding programmes. © Koninklijke Brill NV, Leiden, 2014. Source

Qing X.,Ghent University | Bert W.,Ghent University | Steel H.,Ghent University | Quisado J.,University of Southern Mindanao | De Ley I.T.,University of California at Riverside

Summary - The nematode diversity in soil and litter was investigated on Mount Hamiguitan, the Philippines, along four eco-habitats from elevations of 75-1600 m a.s.l. A total of 155 and 467 nematodes were identified to 39 and 62 genera from litter and soil, respectively. The nematode assemblages and diversity did not show any relation to eco-habitat or elevation. Bacterivorous nematodes were the most common group (37.5%). Acrobeloides was most abundant from the soil and Aphelenchoides from the litter. Bicirronema hamiguitanense n. sp. is herein described based on morphology, morphometrics and molecular data. The new species has the following diagnostic features: a wide lateral field one-fifth of its body diam. with four incisures forming two ornamented ridges; gubernaculum with proximal thickening; spicules (35-38 μm) and gubernaculum (18-20 μm) longer than B. caledoniense; and with 37 molecular autapomorphies supporting its new species status. The phylogenetic position of the new species within Cephalobomorpha is discussed. © Koninklijke Brill NV, Leiden, 2015. Source

Busico-Salcedo N.,James Cook University | Busico-Salcedo N.,University of Southern Mindanao | Owens L.,James Cook University
Indian Journal of Virology

Vibrio owensii is one of the most virulent vibrios known being able to kill crustacean larvae at 102 CFU ml-1. This study describes virulence changes to naïve strains of Vibrio harveyi and Vibrio campbellii when infected with the bacteriophage VOB from a closely related species V. owensii 47666-1. The bacteriophage from V. owensii was induced into lytic phase by using mitomycin C at 100 ng ml-1. One strain of V. harveyi and two strains of V. campbellii from 29 tested containing no prophage were susceptible to lysogenic conversion with VOB. Virulence changes induced in Harveyi clade bacteria included the up-regulation of protein secretion, statistically significant increased haemolysin and chitinase production and increased mortality to nauplii of Penaeus monodon. No change in siderophore production was observed. Bacteriophage VOB is likely to be responsible for some of the virulence factors expressed by V. owensii. As this bacteriophage is able to infect strains of V. harveyi and V. campbellii this phage may contribute to increased virulence of other vibrios in aquaculture and in the natural environment. © 2013 Indian Virological Society. Source

Fernandez L.,International Rice Research Institute | Cabasan M.T.N.,International Rice Research Institute | Cabasan M.T.N.,Catholic University of Leuven | Cabasan M.T.N.,University of Southern Mindanao | And 3 more authors.
Archives of Phytopathology and Plant Protection

The life cycle of the rice root-knot nematode, Meloidogyne graminicola, was studied in an indoor growth chamber on the susceptible Asian rice cultivar UPLRi-5 at 29/26 and 36/32 °C (day/night temperature) under non-flooded and flooded conditions. Adult females were observed 11 days after inoculation (DAI) at 36/32 °C under non-flooded conditions and at 29/26 °C under flooded conditions. At 29/26 °C under non-flooded conditions, adult females were observed at 13 DAI. Completion of the life cycle from the second-stage juvenile (J2) to the second-generation J2 at 29/26 °C under non-flooded conditions was 20 days, and 19 days at 29/26 and 36/32 °C under flooded and non-flooded conditions, respectively. At 36/32 °C under non-flooded conditions, about one-third more adult females were observed compared with the other treatments but this did not result in more second-generation J2. The number of second-generation J2 was significantly higher (more than 15 times) at 29/26 °C under flooded conditions compared with the other treatments. At 25 DAI (i.e. after the second-generation J2 had been generated), a significant 3.5 fold increase in the number of galls per root system was observed on the plants grown at 29/26 °C under non-flooded conditions compared with the other treatments. © 2013 Taylor & Francis. Source

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