Fungitoxicity of Xylem Extracts From Tomato Plants Resistant or Susceptible to Fusarium Wilt

1977 ◽  
Vol 77 (5) ◽  
pp. 693 ◽  
Author(s):  
Erik L. Stromberg
Keyword(s):  
Fusarium Wilt ◽  
Tomato Plants

Presymptomatic detection of Fusarium wilt of tomato by electrical resistance measurement as related to pectic enzyme production

1976 ◽  
Vol 54 (8) ◽  
pp. 752-757 ◽  
Author(s):  
Frank L. Caruso ◽  
Terry A. Tattar ◽  
Mark S. Mount ◽  
Margaret E. Malia
Keyword(s):  
Fusarium Wilt ◽  
Electrical Resistance ◽  
Wilt Disease ◽  
Symptom Development ◽  
In Vitro Production ◽  
Tomato Plants ◽  
Foliar Symptom ◽  
Vitro Production ◽  
Soil Level

Decreases in electrical resistance (ER) of tomato taproots were correlated with the progression of Fusarium wilt disease. Production of polygalacturonase (PG) from four isolates of Fusarium oxysporum f. sp. lycopersici, as determined from ammonium sulfate fractions, was correlated with the degree of virulence of each isolate. A drop in ER in tomato plant taproots at 6 cm below the soil level was noticed within 2 h after separate inoculation with all strains. These drops in ER preceded foliar symptom development by 20 h. Measurement of ER in the stems of inoculated tomato plants, however, was found to be no different from that of uninoculated plants. The rate of ER decrease was correlated with the in vitro production of PG by these isolates; the higher the PG activity, the greater the decrease in ER.

Biocontrol of Fusarium wilt and growth promotion of tomato plants using endophytic bacteria isolated from Nicotiana glauca organs

2016 ◽  
Vol 97 ◽  
pp. 80-88 ◽  
Author(s):  
Rania Aydi Ben Abdallah ◽  
Sonia Mokni-Tlili ◽  
Ahlem Nefzi ◽  
Hayfa Jabnoun-Khiareddine ◽  
Mejda Daami-Remadi
Keyword(s):  
Fusarium Wilt ◽  
Endophytic Bacteria ◽  
Growth Promotion ◽  
Nicotiana Glauca ◽  
Tomato Plants

scholarly journals Biological management of fusarium wilt on tomato caused by Fusarium oxysporum f. sp. lycospersici by some plant growth-promoting bacteria

2020 ◽  
Author(s):  
Halima Z. Hussein ◽  
Shaker I. Al-Dulaimi
Keyword(s):  
Fusarium Oxysporum ◽  
Disease Severity ◽  
Fusarium Wilt ◽  
Wilt Disease ◽  
Systemic Resistance ◽  
Control Treatment ◽  
Plant Growth Promoting Bacteria ◽  
Tomato Plants ◽  
Fusarium Wilt Disease ◽  
Infection Percentage

AbstractChemical approaches have been applied to combat Fusarium wilt disease for a long time. Even though pesticides are effective in controlling the disease, they continue to damage the environment. Environmental-friendly approaches to manage plant disease are the goal of many studies recently. This study was conducted to assess the efficacy of some bio-agents in induction of systemic resistance in tomato plants as a management approach of Fusarium wilt disease caused by Fusarium oxysporum f.sp. lycopersici (FOL) under condition Plastic house. Results of the plastic house experiments showed that all treatments in decreased Fusarium disease percentage and severity on tomato, two bacterial combinations (Streptomyces sp. (St) and Pseudomonas fluorescence (Pf)) decreased the infection percentage and disease severity with 16.6% and 8.3%, respectively. Treatment with St reduced the infection percentage and disease severity with 33.3% and 22.8%, while the Pf treatment showed 41.6% and 31.2% reduction in infection percentage and disease severity, compared to 100% and 91.6% in the control treatment. Results of induced systemic resistance (ISR) biochemical indicators showed significant differences in tomato plants. Peroxidase and Phenylalanine-Ammonia-Lyase (PAL) activity and the Phenol content increased significantly 14 days after treatments compared to the control treatment, which contains only the fungal pathogen FOL.

scholarly journals Bacterial Formulations in Induction of Resistance and Growth Promotion of Tomato Plants

2018 ◽  
Vol 10 (10) ◽  
pp. 493
Author(s):  
José R. M. Campos Neto ◽  
Rafael Ribeiro Chaves ◽  
Diogo Herison Silva Sardinha ◽  
Luiz Gustavo de Lima Melo ◽  
Antônia Alice Costa Rodrigues
Keyword(s):  
Plant Growth ◽  
Fusarium Wilt ◽  
Seed Treatment ◽  
Dry Matter ◽  
Growth Promotion ◽  
Systemic Resistance ◽  
Tomato Plants ◽  
Vigor Index ◽  
Promote Plant Growth ◽  
Induction Of Resistance

The objective of this work was to evaluate the effectiveness of seed treatment with fresh suspensions and powder formulations with Bacillus methylotrophicus to promote plant growth and induction of resistance against fusarium wilt (Fusarium oxysporum f. sp. lycopersici) in tomato plants under greenhouse conditions, verifying the occurrence of morphological and biochemical changes in the evaluated plants. Powder formulations based on Cassava (Manihot esculenta), Arrowroot (Maranta arundinacea) and sodium alginate containing Bacillus, in addition to the commercial product Quartz®, were used to microbiolize the tomato seeds of the cultivar Santa Cruz. The formulations promoted plant growth, with a seedling vigor index greater than 50% for all treatments containing B. mthylotrophicus, in addition to a significant increase in total dry matter. The treatments induced systemic resistance, controlling the fusarium wilt with a 75% reduction of the disease and activation of enzymes such as peroxidase and polyphenoloxidase, only β-1,3-glucanase presented less activity than controls (treatments without B. mthylotrophicus). Thus, the use of formulations containing Bacillus are efficient in promoting plant growth of tomato plants and in inducing resistance to the control of fusarium wilt.

Sign in / Sign up

Export Citation Format

Share Document