General Description of Rhizoctonia Species Complex

Yang, Genhua; Li, Chengyun

doi:10.5772/39026

Cited by 53 publications

(40 citation statements)

References 45 publications

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“…In our study, the disease-conducive soil was found to have approximately 1.47 9 10 11 ITS copies per g of R. solani. The R. solani isolates from the field where the present experiments were undertaken belonged to AG-7, based on universally primed PCR fingerprinting analyses (data not shown), which supports the observations of Yang and Li (2012) who showed that only the AGs 4, 7 and 13 cause diseases in cotton. Other inoculants were also inhibitory, albeit to lesser extents (10 6 -10 7 copies of ITS per g soil).…”

Section: Discussionsupporting

confidence: 89%

“…The primer pair of ST-RS1 and ITS4 tested in the present study is known to detect a wide range of the strains of R. solani (Lievens et al 2006) and is very useful in the in planta detection and quantification of different R. solani strains, but their quantification in soils requires careful consideration of many other factors. The R. solani isolates from the field where the present experiments were undertaken belonged to AG-7, based on universally primed PCR fingerprinting analyses (data not shown), which supports the observations of Yang and Li (2012) who showed that only the AGs 4, 7 and 13 cause diseases in cotton.…”

Section: Discussionsupporting

confidence: 89%

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Microbial Inoculants with Multifaceted Traits Suppress Rhizoctonia Populations and Promote Plant Growth in Cotton

Prasanna

Ramakrishnan

Ranjan

et al. 2016

Journal of Phytopathology

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The suppressive effects of microbial inoculants on cotton seedling mortality were assessed in Rhizoctonia solani‐infested soil. Per cent mortality ranged from 16 to 32 (60–120 days after sowing, DAS) and significant differences were recorded at 120 DAS, especially after drenching with compost tea of Azotobacter sp. and Anabaena torulosa—Trichoderma viride‐biofilmed formulations. The activity of hydrolytic enzymes was reduced in diseased root tissues due to a majority of the microbially inoculated treatments, compared with healthy root tissues. Per cent changes in the amounts of glomalin‐related soil proteins (GRSPs) were 2 to 85% greater than those of the uninoculated experimental controls. These microbial inoculants altered the rhizosphere bacterial communities as evident from the Denaturing gradient gel electrophoresis (DGGE) banding patterns and, also reduced the population of R. solani. While the copy numbers of the internal transcribed spacer (ITS) gene of R. solani in the uninoculated (infested soil) were approximately 1.47 × 1011 per g soil, they were 1.34–1.42 × 105 per g soil after the application of A. torulosa, Anabaena laxa and A. torulosa–Bacillus sp. Increases in yield (ranging from 3 to 23%) due to various microbial inoculants relative to uninoculated controls illustrated their promise as plant growth‐promoting and disease‐suppressing agents. This study illustrates the modulation of rhizosphere ecology through microbial inoculants as a mechanism of disease suppression and sustaining plant growth.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionsupporting

confidence: 89%

Microbial Inoculants with Multifaceted Traits Suppress Rhizoctonia Populations and Promote Plant Growth in Cotton

Prasanna

Ramakrishnan

Ranjan

et al. 2016

Journal of Phytopathology

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“…Affinity for hyphal fusion (anastomosis) (Burpee et al, 1980;Ogoshi et al, 1983;Parmeter and Whitney, 1970) has been used to characterize isolates among Rhizoctonia spp. and binucleate Rhizoctonia (BNR) species with Ceratobasidium teleomorphs (Yang and Li, 2012). To date, isolates of R. solani have been assigned to 13 anastomosis groups (AG-1 to AG-13) based on hyphal anastomosis reactions (Rinehart et al, 2007;Sneh et al, 1998) and those of R. zeae and R. oryzae have each been assigned to their own one group (Carling, 1996;Carling et al, 2002;Carling et al, 1999;Sneh et al, 1998).…”

Section: Introduction 12mentioning

confidence: 99%

New Anastomosis Group F (AG-F) of binucleate Rhizoctonia causing root and stem rot of Pistacia vera

Alaei

Molaei

Mahmoodi

et al. 2017

jcp

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A total of ten isolates of fungi with Rhizoctonia-like mycelia were obtained from infected roots and stems of Pistachio Pistacia vera grown in a commercial nursery in Rafsanjan, Iran, during the autumn of 2011. The infected seedlings showed symptoms of chlorosis that later turned to necrosis. All of the isolates were identified as binucleate Rhizoctonia on the basis of hyphal characteristics and nuclear number. They were tested for detection of the anastomosis group, optimum growth temperature, rDNA-ITS region traits and pathogenicity on pistachio seedlings in vitro and in vivo. The analysis of hyphal anastomosis reaction was carried out with the tester isolates of binucleate

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“…The pathogen infects other several important rotational crops and its inoculum can survive in their residues. R. solani AG-4 infects alfalfa, bean, canola, peas, soybeans, sugar beet, red clover, tomato and potato (Yang & Li, 2012). The wide host range exhibited by these pathogens further complicates management strategies.…”

Section: Introductionmentioning

confidence: 99%

Induction of Resistance Against Rhizoctonia Root Rot of Common Bean

Shehata¹

2015

Journal of Plant Protection and Pathology

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The effect of seed treatments of common bean plants (cv. Nebraska) with Bion, Salicylic Acid (SA) and Paenibacillus polymyxa on infection with Rhizoctonia solani under greenhouse and field conditions was investigated. In greenhouse experiment, all treatments decreased percentages of pre and post-emergence damping-off compared with control grown in infested soil by R. solani. The highest percentage of survival plants was achieved from treatment with Bion 5mM (80%) followed by each of Bion 3mM and SA 5mM (76.7%) compared with control (40.1%). Meantime, significant increases in the values of shoot length, shoot dry weight and root dry weight over the control treatment were achieved. Under field experiments during summer 2009 and 2010 growing seasons, all the tested treatments significantly increased the percentage of survived plants compared with the control. There were no significant differences between the treatments with Bion 3mM and fungicide (Rhizolex-T 3g/Kg seeds) 89.4% and 89.3 %, respectively compared with untreated control 67.9% calculated as means of the two seasons. Also, the treatments with salicylic acid and P. polymyxa were less effective regarding survival plants in 2009 and 2010 growing seasons. Moreover, all treatments significantly increased all the studied vegetative characteristics, i.e. stem length, number of leaves/plant as well as fresh and dry weight of leaves/plant compared with untreated control. Meanwhile, higher increase pe in seed yield (kg/feddan) was estimated with bion and fungicide treatments (86% and 87.7%, respectively) followed by salicylic acid and P. polymyxa (66.8% and 55.4 %, respectively) increasing over the untreated control calculated as means of the two seasons. Laboratory studies indicated that, all treatments were effective in eliciting the activities of peroxidase and polyphenol oxidase. Peroxidase activity was higher with Bion followed by SA treatments; they showed 77.7% and 41.2 % increase over the untreated control, respectively. Meantime, elevation of the polyphenol oxidase activity was showed with Bion followed by SA treatments as 97.7% and 58.0% increasing over the untreated control, respectively. However, Bion treatment resulted in the highest increase in total phenols contents over the untreated control (94.3%) followed by SA and P. polymyxa treatments (57.9% and 52.6%) over the untreated control, respectively.

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General Description of Rhizoctonia Species Complex

Cited by 53 publications

References 45 publications

Microbial Inoculants with Multifaceted Traits Suppress Rhizoctonia Populations and Promote Plant Growth in Cotton

Microbial Inoculants with Multifaceted Traits Suppress Rhizoctonia Populations and Promote Plant Growth in Cotton

New Anastomosis Group F (AG-F) of binucleate Rhizoctonia causing root and stem rot of Pistacia vera

Induction of Resistance Against Rhizoctonia Root Rot of Common Bean

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