排序方式： 共有17条查询结果，搜索用时 31 毫秒
1.
Emily R. Grace Mojgan Rabiey Ville-Petri Friman Robert W. Jackson 《Plant pathology》2021,70(9):1987-2004
Trees and woody plants can be attacked by many pests and pathogens either individually or as polymicrobial infections. In particular, infections caused by tree-specific bacterial pathogens have become more common during the last decade, causing serious concern for important tree and woody plant species in horticulture, urban environments, and forests. For example, Xylella and Pseudomonas bacteria are causing significant economic and ecological devastation throughout Europe in olive, cherry, and other stone fruits, mainly because of lack of efficient control methods and the emergence of bacterial resistance to traditional antimicrobial compounds such as copper and antibiotics. Hence, there is an urgent need for innovative approaches to tackle bacterial plant diseases. One way to achieve this could be through the application of biological control, which offers a more environmentally friendly and targeted approach for pathogen management. This review will explore recent advances in use of pathogen-specific viruses, bacteriophages (or phages), for the biocontrol of bacterial tree diseases. Phages are an important component of plant microbiomes and are increasingly studied in plant pathogen control due to their highly specific host ranges and ability to selectively kill only the target pathogenic bacteria. However, their use still poses several challenges and limitations, especially in terms of managing the bacterial diseases of long-lived trees. A particular insight will be given into phage research focusing on controlling Pseudomonas syringae pathovars, Erwinia amylovora, Xanthomonas species, Ralstonia solanacearum, and Agrobacterium tumefaciens. Recent milestones, current challenges, and future avenues for phage therapy in the management of tree diseases are discussed. 相似文献
2.
Suzy V. Wood Norbert Maczey Amanda F. Currie Alyssa J. Lowry Mojgan Rabiey Carol A. Ellison Robert W. Jackson Alan C. Gange 《Weed Research》2021,61(1):35-44
The annual plant Impatiens glandulifera (Himalayan balsam) is the most widespread invasive non‐native weed in the British Isles. Manual control is widely used, but is costly and laborious. Recently, biological control using the rust fungus Puccinia komarovii var. glanduliferae has been trialled. We designed an experiment to assess the impact of these control methods on invertebrate communities in relation to unmanaged and uninvaded habitats, and to determine whether mycorrhizal inoculation aided post‐control recovery of these communities. Sixty invaded and twenty uninvaded field soil blocks were transplanted to the experiment site, where a mycorrhizal inoculum was added to half of all blocks. Biological and mechanical control treatments were applied to twenty invaded blocks independently; the twenty remaining invaded blocks were left intact. Above‐ and belowground invertebrate samples were collected from the blocks at the end of the growing season. Overall, aboveground invertebrate abundance increased with the removal of I. glandulifera, and several groups showed signs of recovery within one growing season. The effect of mechanical control was more variable in belowground invertebrates. Biological control did not affect aboveground invertebrate abundance but resulted in large increases in populations of belowground Collembola. Our experiment demonstrates that mechanical removal of I. glandulifera can cause rapid increases in invertebrate abundance and that its biological control with P. komarovii var. glanduliferae also has the potential to benefit native invertebrate communities. 相似文献
3.
AbdolMajid Valipour Behrooz Heidari Hamidreza Vaziri S. Mohsen Asghari 《Reproduction in domestic animals》2021,56(10):1349-1357
Kisspeptin, upstream of the hypothalamic-pituitary-gonadal axis, play an essential role in the reproductive process. In the present study, the effect of different types of kisspeptin, including goldfish (Carassius auratus) kiss1 kisspeptin (Kiss1), human kisspeptin (Hkiss) and their combination (Kiss1+H) on the reproductive-related genes (kiss1, Kissr and Cyp19) of adult female goldfish was investigated in comparison with Ovaprim (a synthetic GnRH hormone). Kiss1 and Hkiss were synthesized using a solid-phase synthesis approach. Peptides were injected at a dose of 100 μg/kg body weight. The brain and ovarian tissues of samples were separated for histological studies 24 hr post-injection. The expression of the kiss1, Kissr and Cyp19 genes was measured by RT-PCR. The results showed a significant increase in expression of the reproductive-related genes. Histological analysis revealed higher number of mature oocytes in kisspeptin treated groups compare to other ones. In conclusion, Hkiss and Kiss1+H are the most effective peptides in oocyte maturation and expression of reproductive-related genes. In addition, it seems that kisspeptins in other domestic animals can be used to stimulate the hypothalamus-pituitary-gonadal axis. 相似文献
4.
Azari O Babaei H Derakhshanfar A Nematollahi-Mahani SN Poursahebi R Moshrefi M 《Veterinary research communications》2011,35(4):211-222
The aim of this study was to investigate the effects of transplanted Wharton’s jelly mesenchymal stem cells (WJMSCs) of caprine
umbilical cord on cutaneous wound healing process in goat. After collection of caprine pregnant uterus of mixed breed goats
from abattoir, the Wharton’s jelly (WJ) of umbilical cord was harvested. The tissues were minced in ventilated flasks and
explant culture method was used for separating mesenchymal stem cells (MSCs). The isolated cells were immunostained for Actin
protein, histochemically assayed for the presence of alkaline phosphatase activity, and analyzed for detection of matrix receptors
(CD44) and hematopoetic lineage markers (CD34), using flow cytometery. After The isolated cells, 3 × 106 MSCs were stained with BrdU and prepared for transplantation to each wound. Four 3-cm linear full thickness skin incisions
were made on both sides of thoracic vertebrate of four Raeini goats (two wounds on each side). The left wounds were implanted
with MSCs in 0.6 ml of Phosphate buffer saline (PBS), and the right wounds considered as control group that received 0.6 ml
of PBS. The samples were taken from the wounds 7 and 12 days after the wounding, and healing process was compared histologically
between the two groups. Anti-BrdU staining showed that the transplanted cells were still alive in the wound bed during the
study. The histopathological study revealed that re-epithelialization was complete at days 7 in treated wounds with WJMSCs,
whereas in control wound the wounds still showed incomplete epithelialization 12 days after wounding. Also, microscopic evaluation
showed less inflammation, thinner granulation tissue formation with minimum scar in the treated wounds in comparison with
control wounds. In conclusion, this study demonstrates the beneficial effect of caprine WJMSCs in cutaneous wound healing
in goat. 相似文献
5.
6.
Copper and quaternary ammonium compound distributions across lumber and amounts of available or soluble components were measured in coated and uncoated alkaline copper quat-treated southern pine lumber. Lumber that was not exposed to weathering had slightly higher copper retention near the surface and a steeper quat gradient. After 3?years of natural weathering, copper and quat leachings were significantly reduced by the coatings and leaching rates were low, even though the coatings were failing. The amounts of soluble copper were significantly reduced after weathering, even after accounting for the copper leached during the exposure. The relative amount of soluble monoethanolamine (Mea) remaining after weathering was low compared with copper. This reduction in soluble amine in the wood was most likely responsible for the reduced amounts of available copper. The reduced quat leaching from coated samples is attributed to the extended effectiveness of the coatings in the earlywood. 相似文献
7.
Fatemeh Zandi Fatemeh Goshadrou Anna Meyfour Behrouz Vaziri 《Iranian Biomedical Journal》2021,25(4):226
Viruses are obligatory intracellular parasites that use cell proteins to take the control of the cell functions in order to accomplish their life cycle. Studying the viral-host interactions would increase our knowledge of the viral biology and mechanisms of pathogenesis. Studies on pathogenesis mechanisms of lyssaviruses, which are the causative agents of rabies, have revealed some important host protein partners for viral proteins, especially for most studied species, i.e. RABV. In this review article, the key physical lyssavirus-host protein interactions, their contributions to rabies infection, and their exploitation are discussed to improve the knowledge about rabies pathogenesis. Key Words: Host-Pathogen Interactions, Lyssavirus, Rabies 相似文献
8.
David B. Collinge Dan Funck Jensen Mojgan Rabiey Sabrina Sarrocco Michael W. Shaw Richard H. Shaw 《Plant pathology》2022,71(5):1024-1047
The global sustainability agenda is increasing the demand for reduction in inputs into agricultural production while maintaining profitable yield of quality products. Plant diseases are a major constraint for both yield and product quality, but often tools for their control are ineffective or lacking. Biological control using antagonistic microorganisms has long been a subject of research resulting in a wide range of products that are now available and marketed in specific territories around the world. These preparations are often niche products with narrow uses. The research effort is intense both to develop new biological control agents (BCAs) and to obtain knowledge of the mechanisms underlying biological disease control. The prospects for biological control are promising. As a minimum, BCAs supplement other sustainable disease management practices such as disease resistance, and present opportunities for controlling diseases for which other approaches are ineffective or unavailable. We can realistically expect increasing use of BCAs to control crop diseases in ways that will benefit the environment. This review paper arose from a webinar held by the British Society for Plant Pathology as part of the International Year of Plant Heath (IYPH2020), at which many of the 300 participants posed or discussed interesting questions. This review is based on that input and the panel members at the webinar are all included as co-authors in this review. 相似文献
9.
10.
Seyed Fakhreddin Hosseini Mojgan Zandi Farhid Farahmand Ghavi 《Journal Of Aquatic Food Product Technology》2013,22(6):835-842
ABSTRACTIn the present study, the effect of fish gelatin coating (FG; 4%, w/v) containing oregano (Origanum vulgare L.) essential oil (OEO; 1.2% w/v) on shelf-life extension of rainbow trout (Oncorhynchus mykiss) fillet stored under refrigerated storage (4 ± 1ºC) was investigated. The control and the treated fish samples were analyzed periodically for chemical (pH; total volatile basic nitrogen, TVB-N; peroxide value, PV; thiobarbituric acid, TBA) and microbiological (total viable count, TVC; psychrotrophic count) characteristics. The FG + OEO treatment produced significantly lower (p < 0.05) TVB-N values as compared to control and FG-coated samples after Day 6 and until the end of the storage period. The TBA values remained low and were found to fluctuate during storage. Results showed that TVC exceeded 6 log CFU g?1 on Day 8 of storage for control and FG-coated samples and Day 12 for samples coated with FG + OEO. The reduction of 1.05 and 0.83 log CFU g?1 of psychrotrophic counts was achieved by FG + OEO coating in trout fillet (p < 0.05) as compared with control and FG-coated samples, respectively. Therefore, the incorporation of OEO into FG coating may be a promising method of maintaining the storage quality of the rainbow trout fillet stored at refrigerated temperature. 相似文献