Effects of different levels of saline water on infection of tomato by Botrytis cinerea, the causal agent of gray mold

Abstract

A greenhouse experiment was conducted to investigate the effect of different levels of NaCl salt on tomato upon B. cinerea infection the causal agent of gray mold disease. The disease assessment was recorded after inoculation by using the scale based on percentage leaf area affected, and the growth of the plants was recorded for each treatment. Three weeks after inoculation by conidial suspension, the estimated disease severity on plants of tomato was 35.18% compared to the control. The highest incidence disease increase of gray mold (39.21%) was obtained with using 300 mM of NaCl after inoculation with B. cinerea compared with the other concentrations and as well as distilled water. Under severe salt stress (150 and 300mM) increased susceptibility of gray mold disease severity were observed in plants inoculated with B. cinerea, while under mild salt stress (50mM of NaCl) this effect was reversed. The treatment of plant by B.cinerea has reduced the growth of the aerial part of tomato plants (39.06%) after three weeks inoculation compared to the control. Three levels of NaCl (50, 100 and 150mM) increased respectively the plant height from 12.73 to 29.84%, 0.28 to 27.16% for the fresh eight and 5.75 to 33.35% for dry weight compared to the plants inoculated and irrigated by distilled water. NaCl addition at 300mM on plants inoculated with B. cinerea decreased the height, fresh weight and dry weight at 0.99, 4.45 and 11.01% respectively.

Computational assessment of polymorphism with linkage disequilibrium and hotspots of recombination in pathogenic genes of Fusarium oxysporum f. sp. lycopersici

“…Fusarium oxysporum f. sp. lycopersici (Fol) is a soil borne fungal pathogen which infects roots of tomato, is the most important dietary vegetable crop having excellent source of micronutrients, antioxidants and phytochemicals which are capable of controlling increased cholesterol and weight gain studied by Boualem et al (2018). Fusarium wilt causes significant yield losses in tomato production around world also Ortoneda et al (2004) studied mouse infection model of Fol strains causes severe infection in mouse and the selected five genes causing virulence in plants and mammals are pathogenesis related 1 (PR-1) like protein fpr1, mitogen-activated protein kinase encoding fmk1, class V chitin synthase (chsV), pH response factor pacC and it also produces toxic enzymes tomatinase (tom1).…”