scholarly journals Plant-Eating Nematodes and the Key to Fighting Them

2021 ◽  
Vol 9 ◽  
Author(s):  
Elisabeth Darling ◽  
Marisol Quintanilla-Tornel ◽  
Henry Chung
Keyword(s):  
Plant Roots ◽  
Soil Nematodes

Plant roots interact with many bacteria, fungi, and microscopic organisms within the soil that can impact how well the plants grow. Some of these microscopic organisms are animals called nematodes, and they are an especially important part of the life in the soil. Nematodes can be good, bad, and neutral for plants. Some scientists called nematologists study nematodes and how to prevent the bad ones from damaging important crops, like carrots. Nematologists and other scientists partner up to help farmers manage these pests and grow healthy crops.

scholarly journals Effect of Nematodes on Rhizosphere Colonization by Seed-Applied Bacteria

2004 ◽  
Vol 70 (8) ◽  
pp. 4666-4671 ◽  
Author(s):  
Oliver G. G. Knox ◽  
Ken Killham ◽  
Rebekka R. E. Artz ◽  
Chris Mullins ◽  
Michael Wilson
Keyword(s):  
Pseudomonas Fluorescens ◽  
Water Flow ◽  
Soil Biota ◽  
Plant Roots ◽  
Soil Nematodes ◽  
Passive Transport ◽  
Commercial Products ◽  
Rhizosphere Colonization ◽  
Physical Conditions ◽  
Bacterial Movement

ABSTRACT There is much interest in the use of seed-applied bacteria for biocontrol and biofertilization, and several commercial products are available. However, many attempts to use this strategy fail because the seed-applied bacteria do not colonize the rhizosphere. Mechanisms of rhizosphere colonization may involve active bacterial movement or passive transport by percolating water or plant roots. Transport by other soil biota is likely to occur, but this area has not been well studied. We hypothesized that interactions with soil nematodes may enhance colonization. To test this hypothesis, a series of microcosm experiments was carried out using two contrasting soils maintained under well-defined physical conditions where transport by mass water flow could not occur. Seed-applied Pseudomonas fluorescens SBW25 was capable of rhizosphere colonization at matric potentials of −10 and −40 kPa in soil without nematodes, but colonization levels were substantially increased by the presence of nematodes. Our results suggest that nematodes can have an important role in rhizosphere colonization by bacteria in soil.

Acute and chronic toxicity studies on Polygonum glabrum in experimental animals

2020 ◽  
Vol 3 (1) ◽  
pp. 7-10
Author(s):  
Saravanakumar A ◽  
Gandhimathi R
Keyword(s):  
Chronic Toxicity ◽  
Clinical Stage ◽  
Herbal Medicines ◽  
Plant Roots ◽  
Root Extract ◽  
Experimental Animals ◽  
Toxicity Studies ◽  
Acute And Chronic Toxicity ◽  
Diuretic Agents

Polygonum glabrum is being used in traditional and folklore medicine to treat pneumonia and jaundice. Plant roots are used in ayurvedic preparations to treat fever and colic. The leaves are used as diuretic agents and process vermifuge action. Plant decoction is also used in the treatment of Rheumatism. Besides having many uses and folklore claims, herbal medicines are to be thoroughly investigated for their toxicity also. Therefore this work is being carried out to examine the toxicity of the drug and established dose is safe to use in the clinical stage. The current research studied the acute and chronic toxicity of Polygonum glabrum root extract in rats. It is proved that there was no change in any parameter tested both in acute and chronic toxicity, which means the extract is safe and non-toxic at the dose of 2g/kg also.

Effect of 24-epibrassinolide on localization of ABA, AZP, and dehydrins in wheat plant roots during dehydration

Biomics ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 329-336
Author(s):  
A.R. Lubyanova ◽  
F.M. Shakirova ◽  
M.V. Bezrukova
Keyword(s):  
Triticum Aestivum ◽  
Wheat Germ ◽  
Wheat Plant ◽  
Triticum Aestivum L ◽  
Immunohistochemical Localization ◽  
Plant Roots ◽  
Wheat Roots ◽  
Wheat Seedlings ◽  
Apoplastic Barrier ◽  
Protective Proteins

We studied the immunohistochemical localization of abscisic acid (ABA), wheat germ agglutinin (WGA) and dehydrins in the roots of wheat seedlings (Triticum aestivum L.) during 24-epibrassinolide-pretreatment (EB-pretreatment) and PEG-induced dehydration. It was found coimmunolocalization of ABA, WGA and dehydrins in the cells of central cylinder of basal part untreated and EB-pretreated roots of wheat seedlings under normal conditions and under osmotic stress. Such mutual localization ABA and protective proteins, WGA and dehydrins, indicates the possible effect of their distribution in the tissues of EB-pretreated wheat roots during dehydration on the apoplastic barrier functioning, which apparently contributes to decrease the water loss under dehydration. Perhaps, the significant localization of ABA and wheat lectin in the metaxylem region enhances EB-induced transport of ABA and WGA from roots to shoots under stress. It can be assumed that brassinosteroids can serve as intermediates in the realization of the protective effect of WGA and wheat dehydrins during water deficit.

scholarly journals Future paths for the ‘exploitative segregation of plant roots’ model

2021 ◽  
pp. 1891755
Author(s):  
Ciro Cabal ◽  
Ricardo Martinez-Garcia ◽  
Aurora de Castro ◽  
Fernando Valladares ◽  
Stephen W. Pacala
Keyword(s):  
Plant Roots

scholarly journals The effects of plant resource inputs on the energy flux of soil nematodes are affected by climate and plant resource type

2021 ◽  
Vol 3 (2) ◽  
pp. 134-144
Author(s):  
Lina Zhao ◽  
Binbin Yu ◽  
Mengmeng Wang ◽  
Jie Zhang ◽  
Zhifeng Shen ◽  
...  
Keyword(s):  
Energy Flux ◽  
Soil Nematodes ◽  
Plant Resource ◽  
Resource Type
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