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Articles by R. Othman
Total Records ( 3 ) for R. Othman
  M.M. Tahat , K. Sijam and R. Othman
  An in vitro experiment was conducted to study the effect of different plant root exudates on germination of Glomus mosseae and the growth of bacterial wilt Ralstonia solanacearum. Mycorrhizal spore germination increased when the volume of Mycorrhizal Tomato Root Exudates (MTRE) increased and in contrast, a negative relationship was recorded when the volume of Non-Mycorrhizal Tomato Root Exudates (NMTRE) increased. Similarly, the Mycorrhizal Corn Root Exudates (MCRE) was able to increase the percentage of germinated spores as compared to the Non-Mycorrhizal Corn Root Exudates (NMCRE). The antagonistic effect between Ralstonia solanacearum and Glomus mosseae was also studied in this research. There was no inhibition effect of mycorrhizal and non-mycorrhizal tomato and corn root exudates on growth of R. solanacearum. The study indicated that Glomus mosseae spore germination could be influenced by the host plant or pH medium.
  R. Othman , N.H.M. Salleh and T. Sarmidi
  This study investigated the relationship between the development of tourism industry (ARR), economic growth (GDP) and foreign direct investment (PLA) in 18 major international tourism destinations. Utilizing autoregressive distributed lag (ARDL) methodology; this study finds that there is a long run relationship between variables in this study. This study also indicates the existence of multi-directional relation between all three variables. ARR was found more significant Granger cause to the GDP. GDP was also found a Granger cause to ARR. The bidirectional relationship between ARR and GDP exist in United Kingdom, Malaysia, Singapore, Austria, Turkey, Netherland and Canada. Bidirectional relationship between ARR and PLA was found in French, Mexico, China and Hong Kong, while bidirectional relationship between PLA and GDP being recorded for Austria and Mexico. Research findings also show PLA and GDP variables do not have any relationship in many countries studied. There is a fairly strong relationship between variables ARR of GDP as compared to the relationship between ARR and the PLA variables and the relationship between the PLA and the GDP variables.
  M.M. Tahat , Kamaruzaman , Sijam and R. Othman
  Arbuscular mycorrhizae fungi (AMF) are the symbiotic fungi that predominate in the roots and soils of agricultural crop plants. The AMF form beneficial symbioses in most terrestrial ecosystems and crop production systems. Ninty percent of land plant species are colonized by one or more of the mycorrhizal fungi species ranging from flowering to non flowering plants, while only a few plant families do not form this association. The relationship between mycorrhiza and plant is very widely spread among terrestrial vascular plants. The AMF must have a host to complete its life cycle and this association has been found to be mutually beneficial; thus, the fungus assists the plant in mineral nutrients uptake, while the plant supplies the fungus with carbon as a result of this relation. The negative-antagonistic interaction of AMF with various soilborne plant pathogens is the reason for their use as a bio-control agents. Many workers have observed an antagonistic effect of AMF against some fungal pathogens.
 
 
 
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