Deleterious effects of fungi isolated from paddy soils on seminal root of rice

Furuya, Hiromitsu; Tubaki, K.; Matsumoto, Tsutomu; Fuji, Shin-ichi; Naito, Hideki

doi:10.1007/s10327-005-0208-1

Cited by 8 publications

(7 citation statements)

References 12 publications

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“…These results differ from those of Dingkuhn et al (1992), who reported slightly higher yields in row-seeded rice compared to transplanting. However, in another study, higher paddy yield in transplanted rice than row-seeded at lower N rates of application was reported (Furuya et al 2005). Transplanted rice enables the crop to make rapid early growth, especially with adequate supply of N to intercept more solar radiation and thus to produce and fill spikelets.…”

Section: Resultsmentioning

confidence: 95%

Rice cultures and nitrogen rate effects on yield and quality of rice (Oryza sativa L.)

Maqsood¹,

Shehzad²,

Ali³

et al. 2013

Turk J Agric For

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Field studies in 2010 and 2011 were conducted to evaluate the effect of variable nitrogen rates (0-100 kg N ha -1 ) and culture methods (transplanted and direct) on chlorophyll contents, yield, grain quality, and economics in rice crop (Oryza sativa L. 'Basmati-385'). Transplanted rice gave a significantly higher paddy yield of 19.18% versus direct-seeded crop. Nitrogen application at 100 kg N ha -1 provided a maximum paddy yield (4.39 and 4.67 t ha -1 ) in both years. The rice kernel characteristics were also affected by culture methods and nitrogen levels. In addition, return variable cost in the transplanted rice increased by 22.27% over direct-seeded rice. Regarding quality, the amylose (24.35%) and protein (8.56%) contents were also higher in transplanted rice as compared to direct seeding at 100 kg N ha -1 application. The lowest amylose contents were recorded in N 0 (23.55%) and N 1 (23.69%) treatments, and amylase contents were also found lower in N 0 and N 1 in the direct seeding method. The nitrogen rate and cultures method also affect the chlorophyll contents positively in transplanted plants at higher level of nitrogen. From the results, it is concluded that under the climatic conditions of Faisalabad, Pakistan, higher paddy yield and yield components, as well as greater economic benefits, can be obtained for the transplanted method at 100 kg N ha -1 nitrogen application as compared to the direct seeding method.

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Section: Resultsmentioning

confidence: 95%

Rice cultures and nitrogen rate effects on yield and quality of rice (Oryza sativa L.)

Maqsood¹,

Shehzad²,

Ali³

et al. 2013

Turk J Agric For

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“…In addition, many soil fungi, which could be deleterious to rice growth, also infected roots grown in paddy fi elds. Most of these are believed to be either nonparasitic or saprophytic pathogens (Furuya et al 2005). Thus, roots of rice growing in paddy fi elds might harbor a number of deleterious or inhibitive fungi or Pythium spp., even though the infected plants did not have any disease symptoms.…”

Section: Discussionmentioning

confidence: 99%

“…For each trial, six roots were inoculated. The inhibition was categorized in three ways as described previously (Furuya et al 2005): inhibition of elongation, browning of the root tissue, and inhibition of secondary root development. To detect any elongation inhibition, root growth was measured 72 h after the inoculation.…”

Section: Methodsmentioning

confidence: 99%

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A case study of infection of rice roots by deleterious fungi and minor pathogenic Pythium species in a paddy field

et al. 2007

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A case study of infection of rice roots by deleterious fungi and minor pathogenic Pythium species in a paddy fi eld Abstract Roots of rice plants grown in paddy fi elds in a transplant culture system were collected seven times between 8 and 22 weeks after transplanting, for two crop seasons. Rice seedlings grown in a potting medium amended with the collected roots were signifi cantly shorter than those grown in the same medium either without the addition of the roots or amended with pasteurized, collected roots indicating that seedlings were inhibited by heat-labile microorganisms on the collected rice roots. Ninety-fi ve and 172 pure cultures of Pythium spp. and fungi, respectively, were isolated from the rice roots collected 5 or 7.5 weeks after transplanting in the fi elds. Among these microorganisms, Pythium aristosporum inhibited seedling growth in greenhouse experiments, and Acremonium sp., Alternaria sp., Epicoccum nigrum, Fusarium sp., Massarina sp., Penicillium spp., Rhinocladiella sp., Stemphylium sp., Trichocladium sp., and several unidentifi ed fungi inhibited seminal root growth in in vitro experiments. These microorganisms might be involved in the inhibition of seedling growth in soils amended with the rice roots collected from the paddy fi eld. Thus, roots of rice plants at the middle stage of growth transplanted into paddy fi elds can harbor pathogenic or deleterious fungi or Pythium sp(p). The effects of these microorganisms on rice growth in paddy fi elds are discussed.

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“…For instance, some species of Bacillus, Pseudomonas, Acremonium and Humicola could promote plant growth due to their antagonistic activity, the production of IAA or specific substance to activate resistance for control of diseases (Dharni et al 2014;Hassan et al 2015;Khabbaz et al 2015;Wenhsiung 2009;Yang et al 2014). On the other side, some species of these genera showed negative effect on plant growth due to their broadspectrum pathogenic activity (Elbanna et al 2014;Furuya et al 2005;Iakovleva et al 2013;Racedo et al 2013;Zhang et al 2014). Additionally, the report of other plant suggested that the harmful microbes were increased with the decrease of beneficial microbes under monocultivated conditions, and the soil ecological function was affected (Lin et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Assaying the potential autotoxins and microbial community associated with Rehmannia glutinosa replant problems based on its ‘autotoxic circle’

Bao

Wang

et al. 2016

Plant Soil

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Aims This study attempted to elucidate the underlying correlations among replant problems of Rehmannia glutinosa, the autotoxins and microbes within its rootzone soil. Methods Different root-zone soils of R. glutinosa were collected to identify the potential autotoxins, to quantify the phenolic acids' concentration and to analyse the microbial community composition. Bioassay was conducted to assess the autotoxic potential of these samples and candidate autotoxins. Results R. glutinosa autotoxicity was presented within a 20 cm radius of the plant. Concentrations of the phenolic acids were significantly higher within this range. Twenty compounds and 17 microbes emerged in this range after the R. glutinosa cultivation. Further seedling test showed that four selected compounds possessed conspicuous autotoxic activity and a synergistic effect was observed. Moreover, one potential beneficial fungi (99 % similar with Arthrobotrys oligospora) and one potential pathogens (100 % similar with Acremonium sclerotigenum) were identified. Conclusions Our work defined the 'autotoxic circle' of R. glutinosa and identified the corresponding autotoxins and microbes. We suggest that R. glutinosa has various autotoxins and that these autotoxins and specific microbes deserve further investigation to unravel their interaction with R. glutinosa in replant problems' occurrence.

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Deleterious effects of fungi isolated from paddy soils on seminal root of rice

Cited by 8 publications

References 12 publications

Rice cultures and nitrogen rate effects on yield and quality of rice (Oryza sativa L.)

Rice cultures and nitrogen rate effects on yield and quality of rice (Oryza sativa L.)

A case study of infection of rice roots by deleterious fungi and minor pathogenic Pythium species in a paddy field

Assaying the potential autotoxins and microbial community associated with Rehmannia glutinosa replant problems based on its ‘autotoxic circle’

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