Transgenic ethylene-insensitive tobacco (Tetr) plants spontaneously develop symptoms of wilting and stem necrosis when grown in nonautoclaved soil. Fusarium oxysporum, F. solani, Thielaviopsis basicola, Rhizopus stolonifer, and two Pythium spp. were isolated from these diseased Tetr plants and demonstrated to be causal agents of the disease symptoms. Pathogenicity of the two Pythium isolates and four additional Pythium spp. was tested on ethylene-insensitive tobacco and Arabidopsis seedlings. In both plant species, ethylene insensitivity enhanced susceptibility to the Pythium spp., as evidenced by both a higher disease index and a higher percentage of diseased plants. Based on the use of a DNA probe specific for Pythium spp., Tetr plants exhibited more pathogen growth in stem and leaf tissue than similarly diseased control plants. These results demonstrate that ethylene signaling is required for resistance to different root pathogens and contributes to limiting growth and systemic spread of the pathogen.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1094/MPMI.2002.15.10.1078 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Unlocking olive rhizobacteria: harnessing biocontrol power to combat olive root rot and promote plant growth.
Int Microbiol
January 2025
Phytopathology Unit, Department of Plant Protection, Ecole Nationale d'Agriculture de Meknès, Km 10, Rte Haj Kaddour, BP S/40, 50001, Meknes, Morocco.
Olive trees are susceptible to various diseases, notably root rot caused by Pythium spp., which presents significant challenges to cultivation. Conventional chemical control methods have limitations, necessitating exploration of eco-friendly alternatives like biological control strategies.
View Article and Find Full Text PDFStudying the Antifungal Effects of (Sprengel) R. King and H. Robinson (= Sprengel) as a Bio-Fumigant Plant Alone and in Combination with Biochar Against (Edson) Fitz.
Plants (Basel)
December 2024
Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
spp. are soil-borne pathogens that cause damping-off and root rot diseases in many plant species such as cucumber. In the current study, the effect of dried roots-stems and leaves of (Sprengel) R.
View Article and Find Full Text PDFBiocontrol potential of endophytic Bacillus spp. associated to wild solanaceous species and their secondary metabolites against various potato (Solanum tuberosum L.) storage diseases.
Microb Pathog
November 2024
LR21AGR03-Production and Protection for a Sustainable Horticulture (2PHD), IRESA-University of Sousse, Regional Research Centre on Horticulture and Organic Agriculture, 4042, Chott Mariem, Tunisia.
Fusarium dry rot, Pythium leak and Southern blight diseases caused by various Fusarium species, Pythium aphanidermatum, and Agroathelia rolfsii, respectively, are responsible for important losses of tuber at the post-harvest stage in Tunisia. In the present study, six Bacillus strains, isolated from wild solanaceous plants, were screened for their abilities to inhibit potato pathogens in vitro and on potato tubers. Based on the dual culture assays, the whole cell suspensions of B.
View Article and Find Full Text PDFThe hex1 gene of Trichoderma simmonsii is involved in stress responses, biocontrol potential and wheat plant growth.
Microbiol Res
January 2025
Institute for Agribiotechnology Research (CIALE), Department of Microbiology and Genetics, University of Salamanca, C/ Duero 12, Campus Villamayor-Parque Científico, Villamayor, Salamanca 37185, Spain. Electronic address:
Woronin bodies are unique organelles in Pezizomycotina fungi that allow hyphae compartmentalization and prevent cytoplasmatic bleeding after mechanical injury. Several studies have related the peroxisomal protein HEX1, the major component of Woronin bodies with other biological processes such as hyphal growth, osmotic stress tolerance and pathogenicity. Trichoderma spp.
View Article and Find Full Text PDFA comprehensive review of integrated management strategies for damping-off disease in chili.
Front Microbiol
October 2024
National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, China.
Damping-off disease in chili ( L.) cultivation is a significant global issue, severely affecting seeds, seedlings, and young plants, regardless of the location of cultivation, whether in greenhouses or open fields. Despite chili being a widely popular vegetable used in various cuisines globally, farmers face challenges in meeting the growing demand due to the extensive damage caused by this disease, ranging from 20 to 85%.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!