Resistance in Tomato Plants Against Fusarium Wilt Induced by Fusarium Oxysporum F. Sp. Dianthi.

Tomato plants grown in a Fusarium wilt suppressive soil and in the same soil steamed and amended with non-pathogenic Fusarium strains were protected from subsequent infection with Fusarium oxysporum f. sp. lycopersici.Protected plants had higher laminarinase, chitinase, N-acetyl-glucosaminidase and /3-l,4glucosidase activity than unprotected plants grown in steamed unamended soil. Higher peroxidase and polyphenoloxidase activity and higher content of phenols were also associated with suppressive soil conditions, although in a less consistent way.Among 5 non-pathogenic Fusarium strains, strain Sal was the most suppressive and enhanced enzyme activity more than did the other strains, whereas strain T was inactive and did not induce changes in activity.These results are in accordance with previous work showing that induced resistance is associated with enhanced activity of glycosidases and phenol oxidizing enzymes, and increased phenols content. It is suggested that induced resistance is part of the mechanism of the natural suppressiveness of soil and that this resistance is induced by non-pathogenic Fusarium strains. ' ZusammenfassungPhysiologische Reaktionen von in Fusarium suppressiven Boden wachsenden Tomatenpflanzen Tomatenpflanzen, die in einem Fusarium-^e\^e suppressiven Boden bzw. in dem gleichen mit Wasserdampf sterilisierten und anschliefiend mit nicht pathogenen FusariumSt'immen inokulierten Boden wuchsen, wurden von einer Infektion durch Fusarium oxysporum f. sp. lycoperski geschiitzt.

show abstract

“…Recent data suggest the possibility of inducing systemic resistance with F. oxysporum f. sp. dianthi (KROON et al 1991) in tomato.…”

Section: Tablementioning

confidence: 99%

Physiological Responses of Tomato Plants Grown in Fusarium Suppressive Soil

Tamietti

Ferraris

Matta

et al. 1993

Journal of Phytopathology

View full text Add to dashboard Cite

show abstract

“…Many studies have reported that biological and chemical methods have different control efficiencies against plant disease [ 6 , 7 ], but the mechanisms of different control methods for the microbial community are rarely reported. Previous studies indicated the disease resistance mechanisms of chemical agents, including the reduction of membrane permeability, inhibition of extracellular protease secretion, induction of gene expression, phytoalexin production and induction of systemic resistance, could be considered a direct antimicrobial effects [ 8 , 9 ]. The disease suppression function of BCAs occurs via reciprocal inhibition relationships between biological species [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Ecological strategies of biological and chemical control agents on wildfire disease of tobacco (Nicotiana tabacum L.)

Liu

Zhou

et al. 2021

BMC Microbiol

View full text Add to dashboard Cite

Background To investigate the ecological effects of chemical and biological control methods on tobacco wildfire disease, a plot field experiment was conducted to compare the control efficiency and mechanisms of a chemical pesticide (kasugamycin wettable powder, KWP) and a biological control agent (BCA) through high-throughput sequencing of bacterial 16S rRNA genes. Results The results showed that the BCA displayed better performance in decreasing the disease index and morbidity of tobacco than the chemical pesticide. By monitoring the endophytic community within tobacco leaves, it was found that the control effects of these two methods might be mediated by different changes in the endophytic bacterial communities and community assembly patterns. The application of either method decreased the taxonomic diversity of the leaf endophytic community. Compared to the BCA, KWP showed a more significant effect on the endophytic community structure, while the endophytic community treated with the BCA was able to return to the original state, which presented much lower disease infection. The disease control efficiency of KWP and BCA treatments might be achieved by increasing the abundance of Sphingomonas and Streptophyta, respectively. Furthermore, an analysis of the ecological processes in community assembly indicated that the BCA strengthened the homogeneous and variable selection, while KWP enhanced ecological drift. Conclusions The results suggested different control mechanisms between KWP and BCA treatments, which will help in developing diverse ecological strategies for plant disease control.

show abstract

“…difformis (Lepoivre et al 1986), tomato-F. oxysporum f. sp. lycopersici (Kroon et al 1991), banana-Mycosphaerella musicola (Trujillo and Garcı´a 1996), pineapple-Fusarium subglutinans (Rodrı´guez et al 1998), and potato-Alternaria solani (Dita 1998) interactions.…”

Section: Discussionmentioning

confidence: 99%

Identification of discriminant factors after treatment of resistant and susceptible banana leaves with Fusarium oxysporum f. sp. cubense culture filtrates

Companioni¹,

Mora²,

Díaz³

et al. 2005

Plant Breeding

View full text Add to dashboard Cite

Among the most important crops in developing countries are banana and plantain. However, the production is threatened by increasingly virulent forms of Fusarium wilt, and therefore, intensive breeding programmes are being carried out worldwide. As conventional field studies of banana resistance to this disease are time-consuming and destructive, an easy-to-do procedure was previously developed to differentiate field-grown resistant and susceptible banana cultivars at leaf level. Such a procedure involved the in vitro treatment of fungal culture filtrates on to field-grown adult leaves and the measurement of lesion areas 48 h later. The present report includes measurements of other indicators such as biochemical compounds. The cultivar ÔGross MichelÕ (susceptible) and cv. ÔFHIA-01Õ (resistant) leaves were treated with Fusarium oxysporum f. sp. cubense race 1 culture filtrates. Evaluations were performed 48 h after leaf treatment. Compared with culture medium-treated leaves (control treatment), fungal metabolites produced leaf lesions, decreased free-phenolic contents and increased protein levels in both cultivars. In ÔFHIA-01Õ, the culture filtrate increased contents of cell wall-linked phenolics and the pool of aldehydes (except malondialdehyde). Fungal metabolites did not cause variations in peroxidase activity, chlorophyll pigment contents or malondialdehyde level in any cultivar. The use of Fisher's linear discriminant analysis to differentiate resistant and susceptible banana cultivars in breeding programmes is also a novel aspect of this report. Such an estimation was performed from a data matrix that included the effects of the fungal metabolites (leaf lesion area and levels of free and cell wall-linked phenolics, aldehydes, except malondialdehyde, and proteins) on banana leaves of seven cultivars (four susceptible and three resistant).

show abstract

Resistance in Tomato Plants Against Fusarium Wilt Induced by Fusarium Oxysporum F. Sp. Dianthi.

Cited by 3 publications

References 1 publication

Physiological Responses of Tomato Plants Grown in Fusarium Suppressive Soil

Physiological Responses of Tomato Plants Grown in Fusarium Suppressive Soil

Ecological strategies of biological and chemical control agents on wildfire disease of tobacco (Nicotiana tabacum L.)

Identification of discriminant factors after treatment of resistant and susceptible banana leaves with Fusarium oxysporum f. sp. cubense culture filtrates

Contact Info

Product

Resources

About