PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

How do look for microbes in nature that are beneficial to plant?

How do look for microbes in nature that are beneficial to plant?
2024-09-19
(Press-News.org)

Cucumber is a common vegetable on people’s table because of its crisp and refreshing characteristics. In order to meet the market demand throughout the year, cucumber is now mainly planted in facility greenhouses. However, the loss of soil nutrients and the accumulation of pathogenic microorganisms are inevitable in successive years of cultivation. Cucumber corynespora leaf spot, also known as cucumber target spot disease, is a major foliar disease that causes cucumber yield reduction, and its pathogen is the Corynespora cassiicola. The pathogen harms cucumber leaves, causing irregular spots and affecting the photosynthesis of cucumber. Under high temperature and high humidity, the conidia of C. cassiicola can directly penetrate the epidermis of the host leaf blade through germination and production of bud tubes, or invade the host through stomata and natural wounds, causing the host to develop. At present, the control of plant fungal diseases mainly relies on agrochemicals and cultivation measures, but due to the frequent use of pesticides, resistance of pathogens has subsequently emerged and the effectiveness of fungicides has decreased. At the same time, consumers are increasingly concerned about the environmental impacts and food residues of fungicides.

Therefore, there is an urgent need for methods that can replace chemical pesticides in the control of plant diseases. Biological control offers a viable solution for plant disease management and is an environmentally friendly method that promotes disease management while maintaining ecosystem balance. Through biological control, plant diseases can be effectively controlled without disturbing the natural balance of flora and fauna. In addition, this method improves soil fertility and is an important tool for sustainable agriculture.

In order to achieve the goal of pollution-free and environmentally friendly, this study screened a biocontrol bacterial strain BJ-5 using Corynespora cassiicola as the target pathogen, and BJ-5 was determined to be Paenarthrobacter nitroguajacolicus by morphological and molecular methods. The effect of BJ-5 on C. cassiicola was studied, including the spore germination, cell membrane permeability, and infected cucumbers. BJ-5 inhibited the germination of C. cassiicola spores in vitro and led to atrophy and deformation of the C. cassiicola budding tubes. BJ-5 caused the relative extracellular conductivity of C. cassiicola mycelia to increase compared with the control. Additionally, BJ-5 reduced the severity of cucumber corynespora leaf spot of cucumber infected with C. cassiicola. The inhibition efficacy of BJ-5 suspension as a foliar spray against cucumber corynespora leaf spot reached 63% inhibition, which is higher than a 5000-fold dilution of Luna-Son SC fungicide. In addition, BJ-5 was tested on the emergence of cucumber seedlings, recording the biomass and photosynthesis of cucumber during the growth period. BJ-5 at 1.5 × 105 CFU·mL–1 promoted the germination of cucumber seeds and increased biomass and photosynthesis at the adult plant stage. Also, the secondary metabolites of BJ-5 were determined. BJ-5 could produce chitinases, siderophore, cellulase, amylase, and protease in the respective medium. Finally, adaptation assay of BJ-5 showed good salt tolerance and good adaptability in alkaline conditions, and that BJ-5 retains inhibition of fungi activity at higher temperatures.

When controlling harmful microorganisms in production, attention should be paid to the impact of pesticides on the environment. Finding natural methods to control harmful microorganisms has great potential and is environmentally friendly.  This is the first report of the biocontrol by P. nitroguajacolicus with antagonism to C. cassiicola and promote cucumber growth and indicates that P. nitroguajacolicus may serve as potential biocontrol agents against cucumber corynespora leaf spot fungus.

This study has been published in Frontiers of Agricultural Science and Engineering in 2024, Volume 11, Issue 3. DOI: 10.15302/J-FASE-2024537

END


[Attachments] See images for this press release:
How do look for microbes in nature that are beneficial to plant?

ELSE PRESS RELEASES FROM THIS DATE:

Exotic species invasions enhance biodiversity response to climate change

Exotic species invasions enhance biodiversity response to climate change
2024-09-19
Globally, more than 13,000 plant species, equivalent to the entire native flora of Europe, have been naturalized outside their native ranges. A recent study, jointly conducted by scientists from China and the USA, has provided new insights about biodiversity, exotic invasion, and their relationship to climate change. Published in Nature Plants, the research uncovers the climatic niche mechanisms that shape both the vulnerability of native ecosystems and the invasiveness of exotic species in a warming world. A long-standing debate exists over the impact of exotic species on native ecosystems and ...

Arctic warming may fuel ice formation in clouds

Arctic warming may fuel ice formation in clouds
2024-09-19
The Arctic frequently experiences temperatures that support the formation of mixed-phase clouds that contain supercooled liquid droplets and ice crystals. The composition of such clouds plays a crucial role in the region's energy balance and climate system. Clouds with more liquid last longer and reflect more sunlight than those with more ice crystals. With Arctic warming, meteorologists have been interested in determining the effect of rising temperatures on cloud composition and its broader effect on the region. Climate models generally predict that as the Arctic warms, clouds in the region will ...

Rugged Falklands landscape was once a lush rainforest

Rugged Falklands landscape was once a lush rainforest
2024-09-19
A researcher from the University of Southampton (UK) has found evidence that the treeless, rugged, grassland landscape of the Falkland Islands was home to a lush, diverse rainforest up to 30 million years ago. A study by Dr Zoë Thomas, leading an international team of scientists, reveals that the South Atlantic archipelago was once covered in cool, wet woodland – similar to the present day rainforests found in Tierra del Fuego, off the tip of South America. The scientists conducted the research after clues to the whereabouts of buried remains of the ancient forest reached them via word-of-mouth in the tight knit community of Port Stanley, the Falklands’ ...

Dizziness in older adults is linked to higher risk of future falls

2024-09-19
IMPERIAL COLLEGE LONDON PRESS RELEASE Peer reviewed/Systematic review and meta-analysis/People UNDER EMBARGO UNTIL Thursday 19th September at 00:01 UTC (01:01 BST)   Dizziness in older adults is linked to higher risk of future falls Researchers say it’s not just a normal part of ageing The first meta-analysis of its kind has shown a conclusive link between older adults experiencing spells of dizziness and a dramatically elevated risk of falling. Dizziness is a term used to describe sensations such as vertigo, imbalance, light-headedness, and disorientation. It is common in older adults, affecting one in three of those aged 65 years and older. For the first time, dizziness ...

Triptans more effective than newer, more expensive migraine drugs

2024-09-18
Some triptans are a more effective treatment for acute migraines than newer, more expensive drugs, finds an analysis of the latest evidence published by The BMJ today. Triptans work by narrowing blood vessels in the brain and preventing the release of chemicals that cause pain and inflammation. The findings show that four triptans - eletriptan, rizatriptan, sumatriptan, and zolmitriptan - were better at relieving migraine pain than the recently marketed and more expensive drugs lasmiditan, rimegepant, and ubrogepant, which were comparable to paracetamol ...

Iron given through the vein corrects iron deficiency anaemia in pregnant women faster and better than iron taken by mouth

2024-09-18
Researchers found that a medicine called ferric carboxymaltose given in drip through the vein works faster and better than an iron tablet taken by mouth for the treatment of anaemia – and it is as safe as the tablet. The findings were published in Lancet Global Health.  Anaemia (low blood level) is a common cause of ill-health or death in mothers and their babies, especially in sub-Saharan Africa and South-East Asia where more than four out of ten pregnant women have the condition. A sizeable proportion of pregnant women in Nigeria proceed to giving birth while still anaemic ...

The Lancet Neurology: Air pollution, high temperatures, and metabolic risk factors driving global increases in stroke, with latest figures estimating 12 million cases and over 7 million deaths from st

2024-09-18
Between 1990 and 2021, the number of people who had a new stroke (up by 70%), died from a stroke (up by 44%), and stroke-related health loss (up by 32%), has risen substantially worldwide. Stroke is highly preventable, with 84% of the stroke burden in 2021 attributable to 23 modifiable risk factors, including air pollution, excess body weight, high blood pressure, smoking, and physical inactivity—presenting a public health challenge and an opportunity for action. Notably, the contribution of high temperatures to poor health and early death due to stroke has ...

Incidence of neuroleptic malignant syndrome during antipsychotic treatment in children and youth

Incidence of neuroleptic malignant syndrome during antipsychotic treatment in children and youth
2024-09-18
A new study in the peer-reviewed Journal of Child and Adolescent Psychopharmacology estimated the incidence of neuroleptic malignant syndrome (NMS), a potentially fatal adverse effect of antipsychotic treatment, among individuals ages 5-24 years. Click here to read the article now. Wayne Ray, PhD, from the Vanderbilt University School of Medicine, and coauthors, used national Medicaid data from 2004-2013 to identify patients beginning antipsychotic treatment and calculated the incidence of NMS during antipsychotic use. The investigators identified five ...

Levels of protection from different cycle helmets revealed by new ratings

2024-09-18
Cyclists choosing a new helmet can see how much protection different helmets offer, thanks to new safety testing and ratings from Imperial College London.    Researchers at Imperial College London have developed a simple new cycle helmet safety rating system with simple-to-understand scores from 0-5, designed to help buyers select which helmet to buy and assist manufacturers in future helmet design. The system is based on extensive new safety testing experiments on medium-sized helmets at Imperial.    Testing on the UK’s 30 most popular helmets, funded by The Road Safety Trust, revealed significant ...

Pupils with SEND continue to fall behind their peers

2024-09-18
Pupils with special educational needs and disabilities (SEND) are continuing to fall behind their peers with the gap widening despite the introduction of SEND legislation. This is according to a new study by Durham University which analysed data on 2.5 million Year 6 pupils across four school years from 2014-2019. The research suggests there is a need to re-evaluate the policies for SEND provision and how pupils with SEND are supported in schools. It calls for more investment to support SEND pupils and for increased professional development for teachers and teaching assistants. Using ...

LAST 30 PRESS RELEASES:

Fig trees convert atmospheric CO2 to stone

Intra-arterial tenecteplase for acute stroke after successful endovascular therapy

Study reveals beneficial microbes that can sustain yields in unfertilized fields

Robotic probe quickly measures key properties of new materials

Climate change cuts milk production, even when farmers cool their cows

Frozen, but not sealed: Arctic Ocean remained open to life during ice ages

Some like it cold: Cryorhodopsins

Demystifying gut bacteria with AI

Human wellbeing on a finite planet towards 2100: new study shows humanity at a crossroads

Unlocking the hidden biodiversity of Europe’s villages

Planned hydrogen refuelling stations may lead to millions of euros in yearly losses

Planned C-sections increase the risk of certain childhood cancers

Adults who have survived childhood cancer are at increased risk of severe COVID-19

Drones reveal extreme coral mortality after bleaching

New genetic finding uncovers hidden cause of arsenic resistance in acute promyelocytic leukemia

Native habitats hold the key to the much-loved smashed avocado’s future

Using lightning to make ammonia out of thin air

Machine learning potential-driven insights into pH-dependent CO₂ reduction

Physician associates provide safe care for diagnosed patients when directly supervised by a doctor

How game-play with robots can bring out their human side

Asthma: patient expectations influence the course of the disease

UNM physician tests drug that causes nerve tissue to emit light, enabling faster, safer surgery

New study identifies EMP1 as a key driver of pancreatic cancer progression and poor prognosis

XPR1 identified as a key regulator of ovarian cancer growth through autophagy and immune evasion

Flexible, eco-friendly electronic plastic for wearable tech, sensors

Can the Large Hadron Collider snap string theory?

Stuckeman professor’s new book explores ‘socially sustainable’ architecture

Synthetic DNA nanoparticles for gene therapy

New model to find treatments for an aggressive blood cancer

Special issue of Journal of Intensive Medicine analyzes non-invasive respiratory support

[Press-News.org] How do look for microbes in nature that are beneficial to plant?