Effect of Sclerotinia sclerotiorum on the disease development, growth, oil yield and biochemical changes in plants of Mentha arvensis

Abstract

Experiment was carried out to determine the effect of Sclerotinia sclerotiorum on the disease development, growth, oil yield and biochemical changes in the plants of Mentha arvensis. With the increase in initial inoculum levels of S. sclerotiorum a corresponding decrease in plant fresh and dry weights were recorded. The maximum reduction in the shoot-roots/suckers fresh weight and shoot-roots/suckers dry weights (39.8%, 43.6%, 40.3% and 42.9%), respectively, was observed at the highest initial inoculum level of 12 g fungal mycelium/5 kg soil as compared to uninoculated control. The infection of roots and suckers due to S. sclerotiorum increased with increasing initial inoculum levels. At the lowest initial inoculum (1.0 g mycelium/5 kg soil), infection was observed 18.0% and at the highest (12 g mycelium/5 kg soil), it was 80.2%. Significant (P ⩽ 0.01) reduction in oil yield, total chlorophyll, total phenol and total sugar content of M. arvensis plants was observed at the lowest inoculum level as compared to uninoculated control.

Evaluation of the Phenol Production Potential in Maize (Zea mays L.) in Response to Infection Caused by Fusariun verticillioides (Niren.)

“…Thus, the possibility of the pathogen inducing phenol production could be substantiated by the report that biochemical resistance, tolerance or susceptibility in plants against any disease depends mainly on preexisting, preformed or induced substances by the pathogen in the host [30]. In this study, the higher phenol production that occurred at lower inoculum volume was consistent with the findings of Perveen et al [33] who reported a decrease in total phenol of the leaves of M. arvensis with increase in initial inoculum of S. sclerotiorum, a situation attributed to the altered rates of synthetic activity because of infection by pathogen [34].…”

Antifungal activity of Trichoderma harzianum and T. koningiopsis against Fusarium solani in seed germination and vigor of Miahuateco chili seedlings

“…The plants were kept on the field for 40 days. The severity of the disease was calculated in the infected section in relation with the total root length (Perveen et al, 2010) and classified on the scale of 0 to 3, where 0 = 0 to 25% of severity, 1 = 26 to 50%, 2 = 51 to 75% and 3 = 76 to 100% (Bokhari and Perveen, 2013).…”

“…Las plantas se mantuvieron durante 40 días en campo. La severidad de la enfermedad se calculó en la porción infectada en relación con la longitud total de las raíces (Perveen et al, 2010) y clasificada en la escala de 0 a 3 donde, 0 = 0 a 25% de severidad, 1 = 26 a 50%, 2 = 51 a 75% y 3 = 76 a 100% (Bokhari y Perveen, 2013).…”

Arabidopsis GDSL1 overexpression enhances rapeseed Sclerotinia sclerotiorum resistance and the functional identification of its homolog in Brassica napus

“…In rapeseed farming, S. sclerotiorum causes the rotting of leaves, stems and pods, resulting in an annual 10%–20% yield loss in China, with up to 80% losses in severely infected fields (Oilcrop Research Institute and Chinese Academy of Sciences, 1). Sclerotinia sclerotiorum also causes significant reductions in the oil yield, and the total chlorophyll, phenol and sugar contents of Mentha arvensis plants (Perveen et al , ). Currently, some new sources resistant to S. sclerotiorum have been screened and identified in B. napus and its wild relatives (Taylor et al , ; Uloth et al , ).…”