Seemingly barren heavy-metal-polluted vanadium (V) and titanium (Ti) magnetite mine tailings contain various functional microbes, yet it is unclear whether this includes microbial resources relevant to the biological control of plant diseases. Kiwifruit brown leaf spot disease, caused by , can seriously reduce kiwifruit yield. To discover effective control measures for kiwifruit leaf spot, 18 bacteria strains among 136 tailing-isolated bacteria from V-Ti magnetite mine tailings were identified as inhibiting by the confrontation plate method, indicating that antagonistic bacteria surviving in the V-Ti magnetite mine tailings were present at a low level. The 18 antagonistic strains could be divided into two BOX-A1R clusters. The 13 representative strains that were selected for phylogenetic tree construction based on their 16S rRNA sequences belonged to the genus. Five predominant strains exhibited different toxin-production times and intensities, with four of them initiating toxin production at 32 h. Among them, sp. KT-10 displayed the highest bacteriostatic rate (100%), with a 37.5% growth inhibition rate and an antagonistic band of 3.2 cm against . sp. KT10 also showed a significant inhibitory effect against the expansion speed of kiwifruit brown spots in the pot. The relative control effect was 78.48 and 83.89% at 7 days after the first and last spraying of KT-10 dilution, respectively, confirming a good effect of KT-10 on kiwifruit brown leaf spots in the field. This study demonstrated for the first time that there are some antagonistic bacteria to pathogenic in V-Ti magnetite mine tailings, and sp. KT10 was found to have a good control effect on kiwifruit brown leaf spots in pots and fields, which provided an effective biological control measurement for kiwifruit brown leaf spots.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10963537 | PMC |
http://dx.doi.org/10.3389/fmicb.2024.1280333 | DOI Listing |
Plant Dis
December 2024
Hefei, China;
Insects
September 2024
Dipartimento di Scienze e Tecnologie Agro-Alimentari, Università di Bologna, 40127 Bologna, Italy.
Kiwifruit () cultivation is expanding worldwide, with China, New Zealand, and Italy being the major producing countries. , the brown marmorated stink bug, is raising serious concerns to kiwifruit cultivation both in China and Italy. This study aimed at improving the chemical control efficacy against this pest by comparing two insecticide spray techniques (a conventional ray atomizer and a trumpet-modified atomizer adapted for localized spray application) in kiwifruit.
View Article and Find Full Text PDFPlants (Basel)
August 2024
Special Forest Resources Division, National Institute of Forest Science, Gwonseon-gu, Suwon 16631, Republic of Korea.
A cold storage system is useful for maintaining the quality of hardy kiwifruit. However, extended cold storage periods inevitably result in cold stress, leading to lower fruit marketability; the severity of chilling injury depends on fruit types and cultivars. In this study, the impact of cold storage conditions on the physicochemical properties and antioxidant capacity of two phenotypically different hardy kiwifruit cultivars-'Cheongsan' (large type) and 'Daebo' (small type)-stored at low (L; 3 °C, relative humidity [RH]; 85-90%) and moderate-low (ML; 5 °C, RH; 85-90%) temperatures was determined.
View Article and Find Full Text PDFPlant Dis
July 2024
Sunchon National University, Plant Medicine, 255 Jungang-Ro, Suncheon, Korea (the Republic of), 57922.
Kiwi (Actinidia chinesis) is an economically important fruit in Korea, with 1,300 ha cultivated and a production of approximately 25,000 tons per year (Kim and Koh, 2018; Kim and Choi, 2023). In late June 2020, fruit scab symptoms were observed on A. chinensis var.
View Article and Find Full Text PDFPlant Dis
July 2024
Chengdu Institute of Biology, P. O. Box 416, Chengdu 610041, P. R. China, Chengdu, China, 610041;
Sweet cherry (Prunus avium L.) has become an economically important fruit in China. And its cultivation area has significantly expanded over the last three decades (Wang et al.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!