The double life of Ceratobasidium: orchid mycorrhizal fungi and their potential for biocontrol of Rhizoctonia solani sheath blight of rice

Mycologia ◽  
2013 ◽  
Vol 105 (1) ◽  
pp. 141-150 ◽  
Author(s):  
Ana Teresa Mosquera-Espinosa ◽  
Paul Bayman ◽  
Gustavo A. Prado ◽  
Arnulfo Gómez-Carabalí ◽  
J. Tupac Otero
Keyword(s):  
Rhizoctonia Solani ◽  
Mycorrhizal Fungi ◽  
Sheath Blight ◽  
Orchid Mycorrhizal Fungi

Distribution of the Orchid Mycorrhizal Fungus, Rhizoctonia solani, in Relation to Its Host, Pterostylis acuminata, in the Field

1995 ◽  
Vol 43 (6) ◽  
pp. 565 ◽  
Author(s):  
AJ Perkins ◽  
PA Mcgee
Keyword(s):  
Plant Pathology ◽  
Rhizoctonia Solani ◽  
Host Plant ◽  
Mycorrhizal Fungi ◽  
Mycorrhizal Fungus ◽  
The Other ◽  
Distribution Model ◽  
Orchid Mycorrhizal Fungi ◽  
Adult Plants

The plant pathology model was tested as an explanation of the distribution of orchid mycorrhizal fungi in the field. The mycorrhizal fungus, Rhizoctonia solani Kuhn AG 6, was isolated from adult plants and protocorms of Pterostylis acuminata R.Br. at a study site and from adult plants at five other locations in the Sydney region. In litter and trap seedlings, R. solani AG 6 was found within 50 cm of adult plants of the orchid P. acuminata and was more abundant close to the host plant. In the laboratory, protocorms of P. acuminata became infected with R. solani AG 6, but not with fungi isolated from the other orchids, P. concinna R.Br., P. ophioglossa R.Br. and Caladenia catenata (Smith) Druce, found at the site. It was concluded that the co-distribution model better explains the distribution of fungus and host in this case.

Efficiency of axenically grown Rhizoctonia solani inoculum types in evaluating sheath blight development on rice genotypes

2021 ◽  
Author(s):  
Jagjeet S. Lore ◽  
Jyoti Jain ◽  
Mandeep S. Hunjan ◽  
Ishwinder Kamboj ◽  
Najam W. Zaidi ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Sheath Blight ◽  
Rice Genotypes

Effects of straw incorporation on Rhizoctonia solani inoculum in paddy soil and rice sheath blight severity

2013 ◽  
Vol 152 (5) ◽  
pp. 741-748 ◽  
Author(s):  
H. ZHU ◽  
Z. X. WANG ◽  
X. M. LUO ◽  
J. X. SONG ◽  
B. HUANG
Keyword(s):  
Rhizoctonia Solani ◽  
Disease Severity ◽  
Rice Straw ◽  
Paddy Soil ◽  
Sheath Blight ◽  
Soil Productivity ◽  
Rice Sheath Blight ◽  
Important Method ◽  
Pathogen Dynamics ◽  
Straw Incorporation

SUMMARYIncorporation of rice straw into soil has traditionally been an important method of recycling nutrients and improving soil productivity. Currently, although the effects of straw incorporation on disease severity have been documented, the dynamics of the pathogen in soil after straw incorporation are poorly understood. In the present study, rice straw with various proportions of diseased straw was incorporated at three separate locations (SuPu town, SuSong County and FengYang County) in Anhui province, China. The pathogen dynamics in paddy soil and disease severity of sheath blight during two continuous years from April 2010 to April 2012 were investigated. For all three locations, the amount of pathogen inoculum that persisted in the soil increased with increases in the proportion of diseased straw incorporated. Incorporation of 0·3 and 0·5 diseased straw into soil increased the amount of pathogen inoculum in the soil significantly, whereas incorporation of 0·1 diseased straw into soil had no significant effect on the pathogen inoculum compared with the control (no straw incorporated) or disease severity. Incorporation of healthy rice straw (no disease) resulted in a significant decrease in disease severity, whereas proportions of 0·3 and 0·5 diseased straw resulted in a significant increase of disease severity compared with the control. These results suggested that incorporation of diseased straw enhanced pathogen numbers in soil during the whole decomposition period and increased disease severity. To avoid soil-borne disease accumulation, severely diseased straw should be removed from the field or pre-treated before incorporation.

Functional analysis of polygalacturonase gene RsPG2 from Rhizoctonia solani, the pathogen of rice sheath blight

2017 ◽  
Vol 149 (2) ◽  
pp. 491-502 ◽  
Author(s):  
Xijun Chen ◽  
Li Lili ◽  
Yun Zhang ◽  
Jiahao Zhang ◽  
Shouqiang Ouyang ◽  
...  
Keyword(s):  
Functional Analysis ◽  
Rhizoctonia Solani ◽  
Sheath Blight ◽  
Rice Sheath Blight ◽  
Polygalacturonase Gene

scholarly journals Orchid Reintroduction Based on Seed Germination-Promoting Mycorrhizal Fungi Derived From Protocorms or Seedlings

2021 ◽  
Vol 12 ◽  
Author(s):  
Da-Ke Zhao ◽  
Marc-André Selosse ◽  
Limin Wu ◽  
Yan Luo ◽  
Shi-Cheng Shao ◽  
...  
Keyword(s):  
Seed Germination ◽  
Mycorrhizal Fungi ◽  
Essential Element ◽  
Ecological Factors ◽  
New Approach ◽  
Practical Procedure ◽  
In The Wild ◽  
Orchid Mycorrhizal Fungi ◽  
Ecological Specificity

Orchids are among the most endangered in the plant kingdom. Lack of endosperm in their seeds renders orchids to depend on nutrients provided by orchid mycorrhizal fungi (OMF) for seed germination and seedling formation in the wild. OMF that parasitize in germination seeds is an essential element for orchid seedling formation, which can also help orchid reintroduction. Considering the limitations of the previous orchid reintroduction technology based on seed germination-promoting OMF (sgOMF) sourced from orchid roots, an innovative approach is proposed here in which orchid seeds are directly co-sown with sgOMF carrying ecological specificity from protocorms/seedlings. Based on this principle, an integrative and practical procedure concerning related ecological factors is further raised for re-constructing long-term and self-sustained orchid populations. We believe that this new approach will benefit the reintroduction of endangered orchids in nature.

scholarly journals In Vitro Efficacy of Five Biofungicides against Rhizoctonia solani Kuhn in Rice

2020 ◽  
Author(s):  
Irish Mae Bauzon-Cantila ◽  
Jaime C. Silvestre ◽  
Raquel B. Evangelista ◽  
Edralyn Catubay
Keyword(s):  
Rhizoctonia Solani ◽  
Aloe Vera ◽  
Fungal Disease ◽  
Sheath Blight ◽  
Low Risk ◽  
High Yield ◽  
Melaleuca Alternifolia ◽  
Causal Pathogen ◽  
Chemical Fungicides

ABSTRACTRhizoctonia solani Kuhn, the causal pathogen of sheath blight is second most damaging fungal disease in rice. While using chemical fungicides present high detriment to environment, the study investigate the efficacy of treatments composing five biofungicides in three different rates along with a biological agent, chemical check and untreated against the pathogen in in vitro level. In vitro efficacy showed that Melaleuca alternifolia + terpenes at 3.00 ml/L of H20 (T6), Aloe vera powder (Manopol) + Melaleuca oil at 3.00 ml/L of H20 (T15) and at 2.00 ml/L of H20 (T14) and Melaleuca alternifolia + terpenes at 2.00 ml/L of H20 (T5) as very effective (0-10 mm diameter zone of growth) treatments comparable to the chemical check (T17). Therefore, attaining high yield rice while having low risk to environment can always be done.

scholarly journals Uji Efektivitas Rizobakteria Dalam Menghambat Perkembangan Penyakit Hawar Pelepah Daun (Rhizoctonia solani Kuhn.) Pada Padi Secara In Vitro

2020 ◽  
Vol 16 (1) ◽  
pp. 44
Author(s):  
Hanisa Desy Ariani ◽  
Noor Aidawati ◽  
Dewi Arika Adriani
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Rhizoctonia Solani ◽  
Plant Protection ◽  
Block Design ◽  
Sheath Blight ◽  
In Vitro Test ◽  
Sheath Blight Disease ◽  
Randomized Block Design ◽  
Blight Disease

One of the causes of the declining productivity of rice is sheath blight disease caused by the mold Rhizoctonia solani Kuhn. Control of sheath blight disease that is often done by the farmers is by using chemical pesticides (fungicides), which caused environmental problems. One way to reduce the use of pesticides is to biological control by using antagonist bacteria. This study aimed at in vitro test of rhizobacteria in preventing the development of sheath blight disease in rice plants. This research was conducted in the Phytopathology laboratory of Plant Protection Department of Faculty Agriculture, University of Lambung Mangkurat Banjarbaru from March to May 2018. The experiment used a randomized block design with three groups consisting of eight types of rhizobacteria isolates: (r1) Pseudomonas aeruginosa (Barito Kuala), (r2) Bacillus megaterium (Hulu Sungai Tengah), (r3) Azotobacter sp. (Barito Kuala), (r4) Pseudomonas sp. (Hulu Sungai Selatan), (r5) Flavobacterium sp. (Tanah Laut), (r6) Bacillus bodius (Barito Kuala), (r7) Pseudomonas aeruginosa (Hulu Sungai Selatan), (r8) Necercia sp. (Tanah Laut). The results showed that all rhizobacteria have the ability to inhibit the development of R. solani with different percentages of inhibitions. Pseudomonas aeruginosa (Barito Kuala) was the most effective rhizobacteria in inhibiting the development of R. solani.

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