scholarly journals CHARACTERISTICS OF VIRAL INFECTION DEVELOPMENT CAUSED BY POTATO VIRUS M UNDER THE IMPACT OF BIOPREPARATIONS ON POTATO PLANTS

2014 ◽  
Vol 20 ◽  
pp. 60-65
Author(s):  
I. H. Budzanivska ◽  
T. O. Bova ◽  
O. O. Kucheriavenko ◽  
O. V. Pyrih ◽  
O. O. Dmytruk
Keyword(s):  
Viral Infection ◽  
Potato Virus ◽  
Higher Plants ◽  
Virus Concentration ◽  
Developmental Study ◽  
Total Chlorophyll ◽  
Potato Plants ◽  
Total Chlorophyll Content ◽  
Potato Virus M ◽  
The Impact

The paper presents the results of developmental study of viral infection caused by Potato virus M under the impact of microbial preparations on potato plants. Use of biopreparations Biogran and Bactopaslen, at artificial plants infection with PVM had ensured development of higher plants infected with virus, increase of total chlorophyll content compared to control, decrease of virus concentration in plants and activity of ribonuclease enzyme in potato plants infected with PVM.

scholarly journals Arbuscular Mycorrhizal Symbiosis Limits Foliar Transcriptional Responses to Viral Infection and Favors Long-Term Virus Accumulation

2011 ◽  
Vol 24 (12) ◽  
pp. 1562-1572 ◽  
Author(s):  
Laura Miozzi ◽  
Marco Catoni ◽  
Valentina Fiorilli ◽  
Philip M. Mullineaux ◽  
Gian Paolo Accotto ◽  
...  
Keyword(s):  
Viral Infection ◽  
Virus Titer ◽  
Arbuscular Mycorrhizal ◽  
Defense Responses ◽  
Virus Concentration ◽  
Primary Metabolism ◽  
Transcriptional Responses ◽  
Am Fungus ◽  
Mycorrhizal Plants ◽  
The Impact

Tomato (Solanum lycopersicum) can establish symbiotic interactions with arbuscular mycorrhizal (AM) fungi, and can be infected by several pathogenic viruses. Here, we investigated the impact of mycorrhization by the fungus Glomus mosseae on the Tomato spotted wilt virus (TSWV) infection of tomato plants by transcriptomic and hormones level analyses. In TSWV-infected mycorrhizal plants, the AM fungus root colonization limited virus-induced changes in gene expression in the aerial parts. The virus-responsive upregulated genes, no longer induced in infected mycorrhizal plants, were mainly involved in defense responses and hormone signaling, while the virus-responsive downregulated genes, no longer repressed in mycorrhizal plants, were involved in primary metabolism. The presence of the AM fungus limits, in a salicylic acid-independent manner, the accumulation of abscissic acid observed in response to viral infection. At the time of the molecular analysis, no differences in virus concentration or symptom severity were detected between mycorrhizal and nonmycorrhizal plants. However, in a longer period, increase in virus titer and delay in the appearance of recovery were observed in mycorrhizal plants, thus indicating that the plant's reaction to TSWV infection is attenuated by mycorrhization.

scholarly journals Monoclonal antibody-based serological detection of potato virus M in potato plants and tubers

2020 ◽  
Vol 19 (5) ◽  
pp. 1283-1291 ◽  
Author(s):  
Yu ZHANG ◽  
Yan-ling GAO ◽  
Wan-qin HE ◽  
Ya-qin WANG ◽  
Ya-juan QIAN ◽  
...  
Keyword(s):  
Monoclonal Antibody ◽  
Potato Virus ◽  
Serological Detection ◽  
Potato Plants ◽  
Potato Virus M

scholarly journals Interactive physiological response of potato (Solanum tuberosum L.) plants to fungal colonization and Potato virus Y (PVY) infection

2014 ◽  
Vol 1 (1) ◽  
pp. 291-303 ◽  
Author(s):  
Dominika Thiem ◽  
Adriana Szmidt-Jaworska ◽  
Christel Baum ◽  
Katja Muders ◽  
Katarzyna Niedojadło ◽  
...  
Keyword(s):  
Viral Infection ◽  
Biotic Stress ◽  
Mycorrhizal Fungi ◽  
Fungal Infections ◽  
Infected Plant ◽  
Mycorrhizal Fungus ◽  
Fungal Colonization ◽  
Potato Plants ◽  
Fungal Associations ◽  
The Impact

Potato plants can be colonized by various viruses and by symbiotic, saprophytic and pathogenic fungi. However, the significance of interactions of viral infection and fungal colonization is hardly known. This work presents a model experiment in which the influence of three different types of fungal associations on the growth and physiology of the potato variety Pirol was tested individually or in combination with infection by PVY. It was hypothesized that simultaneous viral and fungal infections increase the biotic stress of the host plant, but mutualistic plant-fungal associations can mask the impact of viral infection. In the present study, a symbiotic arbsucular mycorrhizal fungus, <em>Glomus intraradices</em>, significantly stimulated the growth of plants infected with PVY. In contrast, two saprophytic <em>Trichoderma</em> spp. strains either did not influence or even inhibited the growth of PVY-infected plants. Also, inoculation of PVY-infected potato plants with a pathogenic strain of <em>Colletotrichum coccodes</em> did not inhibit the plant growth. Growth of the PVY-free potato plants was not promoted by the symbiotic fungus, whereas <em>T. viride</em>, <em>T. harzianum</em> and <em>C. coccodes</em> had an evident inhibitory effect. The strongest growth inhibition and highest concentration of H<sub>2</sub>O<sub>2</sub>, as an indicator of biotic stress, was observed in PVY-free potato plants inoculated with <em>T. harzianum</em> and <em>C. coccodes</em> strains. Surprisingly, ultrastructural analysis of PVY-infected plant roots colonized by <em>G. intraradices</em> showed virus-like structures in the arbuscules. This pointed to the possibility of mycorrhizal-mediated transmission of virus particles and has to be further examined by testing with immunoassays and real transmission to uninfected plants. In conclusion, although mycorrhiza formation might decrease the impact of PVY infection on plants, a possible role of mycorrhizal fungi as virus vectors is discussed.

Transgenic potato plants expressing the potato virus X (PVX) coat protein gene developed resistance to the viral infection

2002 ◽  
Vol 30 (2) ◽  
pp. 177-185 ◽  
Author(s):  
V. Doreste ◽  
P. L. Ramos ◽  
G. A. Enríquez ◽  
R. Rodríguez ◽  
R. Peral ◽  
...  
Keyword(s):  
Coat Protein ◽  
Viral Infection ◽  
Potato Virus ◽  
Coat Protein Gene ◽  
Protein Gene ◽  
Potato Virus X ◽  
Transgenic Potato ◽  
Potato Plants ◽  
Transgenic Potato Plants

scholarly journals THE IMPACT OF ROSE BLOOM DISEASE (Exobasidium oxycocci) ON THE PHOTOSYNTHETIC BIOLOGY OF CRANBERRY

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 605c-605
Author(s):  
J. Scott Cameron ◽  
Peter R. Bristow
Keyword(s):  
Dry Weight ◽  
Weight Basis ◽  
Healthy Tissue ◽  
Total Chlorophyll ◽  
Mesophyll Conductance ◽  
Total Chlorophyll Content ◽  
Area Basis ◽  
Use Efficiency ◽  
Fourth Derivative ◽  
The Impact

Gas exchange measurements were made on healthy and rose bloom infected branches of cranberry on 31 May 1991 during the middle of the sporing period. CO2 assimilation rates of infected branches were reduced 89% on a leaf area basis and 95% on a dry weight basis compared to healthy tissue. Stomatal conductance was 12× higher in infected tissue, while mesophyll conductance was reduced by 92%. Transpiration was 4× higher in diseased tissue reducing water use efficiency by 96%. Total chlorophyll content of diseased tissue was 81% less than that of healthy tissue but chlorophyll a/b was unchanged. Fourth derivative profiles of chlorophyll action spectra were altered in diseased tissue. Rose bloom leaves were found to lack stomata and have no discernable mesophyll layer.

scholarly journals Impact of Vasicine on Growth, physiological traits and Yield of Tomato

2020 ◽  
Vol 107 ◽  
pp. 1-4
Author(s):  
Sivakumar R ◽  
◽  
Jeyakumar P ◽  
Keyword(s):  
Foliar Application ◽  
Positive Impact ◽  
Foliar Spray ◽  
Growth Hormones ◽  
Growth And Yield ◽  
Total Chlorophyll ◽  
Total Chlorophyll Content ◽  
Combined Application ◽  
The Impact ◽  
Pot Culture

Vasicine is a quinazoline alkaloid present in Adulsa. An experiment was conducted to assess the impact of vasicine on growth, photosynthesis and yield of tomato under pot culture. Vasicine was applied as soil application in the form of vigo @ 4 kg acre-1 (50% as basal and 50% at 15 days after transplanting), and as foliar application in the form vigo @ 2 mL L-1 at 15 and 30 DAT and both combined soil and foliar application. Combined application of vasicine in the form of vigo through soil and foliar spray increased leaf area by 16.9% and soluble protein by 24.02% over control. This is on par with foliar application of vigo @ 2 mL L-1 twice at 15 and 30 days after transplanting. Tallest plant (116.56 cm) and longest root length (73.25 cm) were observed in combined soil and foliar application of vasicine. Combined application recorded higher total chlorophyll content (1.34 mg g-1) followed by foliar application (1.18 mg g-1) compared to control (1.09 mg g-1). Combined application of vasicine through soil and foliar recorded the highest fruit yield of 26.23 t ha-1 which is on par with foliar spray of vigo @ 2 mL L-1 (25.68 t ha-1) and least recorded in control (21.52 t ha-1). Vasicine might compose of growth hormones like auxin, gibberellins and cytokinin, which are playing a major role in plant growth and metabolism. Hence, the new biostimulant vasicine showed its positive impact on growth and yield in tomato.

scholarly journals Vermicompost and Eisenia Foetida as Factors Influencing the Formation of Radish Phytomass

2018 ◽  
Vol 64 (2) ◽  
pp. 49-56
Author(s):  
Peter Kováčik ◽  
Peter Šalamún ◽  
Jadwiga Wierzbowska
Keyword(s):  
Vitamin C ◽  
Chlorophyll Content ◽  
Cultivated Plants ◽  
Nitrate Content ◽  
Soil Parameters ◽  
Root Weight ◽  
Eisenia Foetida ◽  
Total Chlorophyll ◽  
Total Chlorophyll Content ◽  
The Impact

Abstract Many of the world’s findings indicate the positive effect of earthworms on soil parameters, and consequently, on the formation of phytomass of cultivated plants. In our experiment we studied: A) the influence of soil itself, soil mixed with vermicompost in a ratio of 9:1; B) the influence of earthworms number (genus Eisenia foetida, 10 and 20 individuals per pot) supplied to soil mixed with vermicompost in the ratio of 9:1 on the dynamics of changes in the weight of radish roots, the total chlorophyll content in leaves and the selected qualitative parameters of the roots. The results obtained showed that one tenth proportion of vermicompost from the total weight of soil substrate caused the statistically significant increase in the total chlorophyll content in leaves, the increase in yield of radish roots, the reduction of the vitamin C content and the increase of nitrate content in the roots. The impact of earthworms on the chlorophyll content in leaves and on the root weight was negative. The addition of 10 individuals of earthworms into 20 kg of substrate (soil + vermicompost) resulted in the increased content of vitamin C and the decreased content of nitrates in the radish roots. Twenty earthworms added to vermicompost, compared to vermicompost alone, did not affect the vitamin C content and reduced the nitrate content.

scholarly journals A Theoretical Analysis of Relations between Pressure Changes along Xylem Vessels and Propagation of Variation Potential in Higher Plants

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 372
Author(s):  
Ekaterina Sukhova ◽  
Elena Akinchits ◽  
Sergey V. Gudkov ◽  
Roman Y. Pishchalnikov ◽  
Vladimir Vodeneev ◽  
...  
Keyword(s):  
Higher Plants ◽  
Initial Point ◽  
Electrical Signal ◽  
Terminal Point ◽  
Hydraulic Pressure ◽  
Long Distance ◽  
Variation Potential ◽  
Damaged Zone ◽  
Pressure Dynamics ◽  
The Impact

Variation potential (VP) is an important long-distance electrical signal in higher plants that is induced by local damages, influences numerous physiological processes, and participates in plant adaptation to stressors. The transmission of increased hydraulic pressure through xylem vessels is the probable mechanism of VP propagation in plants; however, the rates of the pressure transmission and VP propagation can strongly vary. We analyzed this problem on the basis of a simple mathematical model of the pressure distribution along a xylem vessel, which was approximated by a tube with a pressure gradient. It is assumed that the VP is initiated if the integral over pressure is more than a threshold one, taking into account that the pressure is transiently increased in the initial point of the tube and is kept constant in the terminal point. It was shown that this simple model can well describe the parameters of VP propagation in higher plants, including the increase in time before VP initiation and the decrease in the rate of VP propagation with an increase in the distance from the zone of damage. Considering three types of the pressure dynamics, our model predicts that the velocity of VP propagation can be stimulated by an increase in the length of a plant shoot and also depends on pressure dynamics in the damaged zone. Our results theoretically support the hypothesis about the impact of pressure variations in xylem vessels on VP propagation.

scholarly journals A Case of COVID-19-Related Thrombocytopenia and Leukopenia in an Adolescent with Mild Symptoms

Children ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 509
Author(s):  
Lydia Kossiva ◽  
Athanasios Thirios ◽  
Eleni Panagouli ◽  
Alexandros Panos ◽  
Stavroula Lampidi ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Viral Infection ◽  
Nasal Congestion ◽  
Pediatric Population ◽  
Clinical Manifestations ◽  
Bone Marrow Aspiration ◽  
White Blood Count ◽  
Chronic Obstructive ◽  
First Case ◽  
The Impact

Since the beginning of the COVID-19 pandemic, there have been numerous reports and reviews on the complications caused by the disease, analyzing the acute and chronic consequences. The main symptoms of SARS-CoV-2 are dry cough, fever, and fatigue. COVID-19 appears to affect all systems, including renal, cardiovascular, circulatory, and respiratory systems, causing chronic obstructive pulmonary disease. We report on a 14-year-old male adolescent, who presented with thrombocytopenia (platelet count 92 × 109 /L) and leukopenia (white blood count 4.2 × 103 /μL) that was observed two months ago. Ten days before the first blood test, a viral infection with nasal congestion and runny nose was reported, without other accompanying symptoms. Viral antibodies screening revealed positivity for all the three specific COVID-19 antibodies. Further haematological evaluation with bone marrow aspiration revealed non-specific dysplastic features of the red cell and megakaryocyte progenitors. Although haematological alterations due to COVID-19 infection are available from adult patients’ reports, the effect of COVID-19 infection in the pediatric population is underestimated and this is the first case with such haematological involvement. Noteworthy, in the current case, the impact of the COVID-19 infection was not related to the severity of the disease, as the symptoms were mild. In similar cases, bone marrow aspiration would not be performed as a part of routine work-up. Thus, it is important when evaluating pediatric patients with COVID-19 infection to search and report those alterations in order to better understand the impact and the spectrum of clinical manifestations of the specific viral infection in children and adolescents.

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