Assessing the effects of varied temperature and pH on the growth and sclerotial formation of Rhizoctonia solani Kuhn, isolated from paddy field: a case study.

Abstract

Rhizoctonia solani Kuhn, is one of the most important pathogen of rice causing the sheath blight disease which accounts for heavy crop losses in all the major rice growing areas of the world, including tropical Asia. The proliferation of this soil borne pathogen depends on many abiotic factors. The two most common factors associated with the growth and spread of the pathogen is pH and temperature which has been studied in the present study. Both pH and temperature had significant effect on the growth of the fungal mycelial and sclerotial formation. A non-linear regression model for growth of the fungal mycelia revealed that growth occurred best at pH 6.0 and temperature 30°C for all treatments studied. No growth was observed below 15°C. In agricultural fields sclerotia, forms the means for the spread of the pathogen causing secondary disease incidence as well as survival of the pathogen in harsher conditions. Sclerotia formed between the temperatures of 20°C and 30°C, with an optimum at 30°C and pH 6.0. DOI: http://dx.doi.org/10.3126/ijls.v8i2.10226 International Journal of Life Sciences Vol.8(2): 2014; 4-9

Biodiversity of Rhizoctonia solani in Phaseolus vulgaris Seeds in East Delta of Egypt

“…A non-linear regression model was used to examine the growth of the fungal mycelia, and the results showed that, for all treatments, growth was mostly favourable at a pH of 6.0 and at 30 • C. However, the pH of the soil had no appreciable effect on the ability of the fungus to survive [74]. With this experiment, the effect of pH on R. solani growth was also confirmed.…”

Pengaruh Suhu, pH, dan Cahaya terhadap Pertumbuhan In Vitro Rhizoctonia solani pada Tanaman Jagung

“…Menurut Orozco-Avitia et al (2013), analisis efisiensi metabolisme optimum untuk sebagian besar isolat berkisar antara suhu 15 dan 25 °C karena pada suhu di atas 30 °C isolat mengalami peningkatan pengeluaran energi untuk menggunakan CO2 membentuk struktur biomassa. Hasil penelitian (Datta et al, 2014) melaporkan bahwa isolat R solani AG1-IA padi memperlihatakan pertumbuhan pada kisaran suhu 15-30 o C dengan pertumbuhan optimum pada suhu 30 o C. Menurut (Sukamto dan Tombe, 1992) R. solani penyebab busuk pangkal batang pada tanaman Mentha dapat tumbuh pada suhu 13-30 o C dan pertumbuhan miselium optimum pada suhu 25 o C, sedangkan pada suhu 40 o C jamur mati.…”

“…Hasil penelitian (Goswami et al, 2011), menunjukkan lima isolat R. solani yang diisolasi dari tanaman padi mempunyai pertumbuhan optimum dengan pH berkisar 6-7. (Datta et al, 2014) juga melaporkan isolat R. solani dari tanaman padi tumbuh optimum pada pH 6.…”