scholarly journals Causes of differences in the distribution of the invasive plants Ambrosia artemisiifolia and Ambrosia trifida in the Yili Valley, China

2020 ◽  
Vol 10 (23) ◽  
pp. 13122-13133
Author(s):  
Hegan Dong ◽  
Zhanli Song ◽  
Tong Liu ◽  
Zhongquan Liu ◽  
Yan Liu ◽  
...  
Keyword(s):  
Invasive Plants ◽  
Ambrosia Artemisiifolia ◽  
Ambrosia Trifida

Competition between Ambrosia artemisiifolia and Ambrosia trifida : Is there a threat of a stronger competitor?

Weed Research ◽  
2021 ◽  
Author(s):  
Aleksandra Savić ◽  
Mostafa Oveisi ◽  
Dragana Božić ◽  
Danijela Pavlović ◽  
Markola Saulić ◽  
...  
Keyword(s):  
Ambrosia Artemisiifolia ◽  
Ambrosia Trifida

Monographs on invasive plants in Europe N°5: Ambrosia trifida L.

2021 ◽  
pp. 1-23
Author(s):  
Bruno Chauvel ◽  
Guillaume Fried ◽  
Swen Follak ◽  
Daniel Chapman ◽  
Yuliana Kulakova ◽  
...  
Keyword(s):  
Invasive Plants ◽  
Ambrosia Trifida

scholarly journals CLINICAL AND IMMUNOLOGICAL EFFECTIVENESS OF TREATMENT OF RAGWEED POLLINOSIS IN THE SAMARA REGION

2021 ◽  
Vol 23 (4) ◽  
pp. 921-926
Author(s):  
N. N. Zhukova ◽  
M. V. Manzhos ◽  
L. R. Khabibulina ◽  
E. Yu. Syrtsova
Keyword(s):  
Allergic Rhinitis ◽  
Russian Federation ◽  
Allergic Diseases ◽  
Ambrosia Artemisiifolia ◽  
Control Group ◽  
Ambrosia Trifida ◽  
Results Of Treatment ◽  
Amb A 1 ◽  
The Russian Federation ◽  
Time Changes

Allergic rhinitis and bronchial asthma are widespread respiratory allergic diseases. In some territories of the Russian Federation, the dominant cause of pollinosis is ragweed. The aim of the study was to evaluate the clinical and immunological efficacy of ASIT with the allergen Ambrosia artemisiifolia in patients sensitized to Ambrosia trifida in the Samara region. Patients with proven sensitization to Ambrosia trifida was held immunotherapy with Ambrosia artemisiifolia allergoid preseason. After treatment, patients had a decrease in the severity of symptoms of allergic rhinitis according to VAS (p = 0.00001), a decrease in the need for medications (p = 0.0003), as well as the need for corticosteroids against the background of therapy from 34.6% to 0% (p = 0.00001). In 8% of cases, the result of treatment was good, in 69% satisfactory, in 23% unsatisfactory. In the control group, there were no changes in the severity of symptoms (p = 0.858). Also, in the control group, the need for medications remained unchanged and 14.3% of patients continued to use corticosteroids.After ASIT, there was a decrease in the level of IL-4 (p = 0.002), and a decrease in the ratio of IL-4/ IL-10 (p = 0.0063); at the same time, changes in the level of other cytokines (IL-10; IFNγ) were statistically insignificant (p > 0.05). Before treatment, the levels of IL-4/ IL-10 in both groups were comparable, and after treatment, the differences became statistically significant (p = 0.031). We did not get a statistically significant change in the level of IgG4 Amb a 1 or IgG4 Amb trifida. There was no correlation between the level of individual cytokines and the results of treatment. As a result of the conducted ASIT, positive clinical and immunological results were obtained. In most patients, the disease has acquired a controlled course. At the same time, the lack of excellent and low number of good results of ASIT is probably due to the intraspecific allergenic properties of ragweed. 

scholarly journals The significance of biomass allocation to population growth of the invasive species Ambrosia artemisiifolia and Ambrosia trifida with different densities

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Wenxuan Zhao ◽  
Tong Liu ◽  
Yan Liu ◽  
Hanyue Wang ◽  
Ruili Wang ◽  
...  
Keyword(s):  
Cluster Formation ◽  
Ambrosia Artemisiifolia ◽  
High Density ◽  
High Population ◽  
Leaf Biomass ◽  
Total Biomass ◽  
Low Density ◽  
Population Densities ◽  
Ambrosia Trifida ◽  
Short Period

Abstract Background Ambrosia artemisiifolia and Ambrosia trifida are globally distributed harmful and invasive weeds. High density clusters play an important role in their invasion. For these two species, the early settled populations are distributed at low densities, but they can rapidly achieve high population densities in a short period of time. However, their response to intraspecific competition to improve the fitness for rapid growth and maintenance of high population densities remains unclear. Therefore, to determine how these species form and maintain high population densities, individual biomass allocations patterns between different population densities (low and high), and plasticity during seedling, vegetative, breeding and mature stages were compared. In 2019, we harvested seeds at different population densities and compared them, and in 2020, we compared the number of regenerated plants across the two population densities. Results Most biomass was invested in the stems of both species. Ambrosia trifida had the highest stem biomass distribution, of up to 78%, and the phenotypic plasticity of the stem was the highest. Path analysis demonstrated that at low-density, total biomass was the biggest contributor to seed production, but stem and leaf biomass was the biggest contributors to high-density populations. The number of seeds produced per plant was high in low-density populations, while the seed number per unit area was huge in high-density populations. In the second year, the number of low-density populations increased significantly. A. artemisiifolia and A. trifida accounted for 75.6% and 68.4% of the mature populations, respectively. Conclusions High input to the stem is an important means to regulate the growth of the two species to cope with different densities. These two species can ensure reproductive success and produce appropriate seed numbers. Therefore, they can maintain a stable population over time and quickly form cluster advantages. In the management, early detection of both species and prevention of successful reproduction by chemical and mechanical means are necessary to stop cluster formation and spread.

scholarly journals A promising method to control ragweed Ambrosia artemisiifolia L. in urban cenoses

2021 ◽  
Vol 285 ◽  
pp. 02018
Author(s):  
Leonid Esipenko ◽  
Almaskhan Ketsba
Keyword(s):  
Invasive Plants ◽  
Agricultural Production ◽  
Allergic Diseases ◽  
Ambrosia Artemisiifolia ◽  
Economic Consequences ◽  
Economic Damage ◽  
Weed Species ◽  
The World ◽  
Positive Results ◽  
Modern Technologies

Invasions of adventive weed species are one of the leading factors in the transformation of agrobiocenoses and urban cenoses. Naturalization of new species leads to serious ecological, social and economic consequences. One of the dangerous invasive plants is ragweed (Ambrosia artemisiifolia L.), which is widespread in many countries of the world, including Russia. This weed plant causes significant economic damage and harmful impact on human health, since its pollen is a strong allergen. Modern technologies of agricultural production do not always give positive results in the fight against this plant. Therefore, it is necessary to develop new ecologically low-hazard methods to control it, aimed at reducing the productivity of pollen and seeds in order to reduce allergic diseases among people and limit the expansion of its range.

Sesquiterpene Lactones of Ambrosia artemisiifolia L. and Ambrosia trifida L. Species

1992 ◽  
Vol 57 (5) ◽  
pp. 1092-1102 ◽  
Author(s):  
Ełżbieta Błoszyk ◽  
Urszula Rychłewska ◽  
Beata Szczepanska ◽  
Miloš Buděšínský ◽  
Bohdan Drożdż ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Aerial Part ◽  
Sesquiterpene Lactones ◽  
Ambrosia Artemisiifolia ◽  
Cd Spectra ◽  
Ambrosia Trifida ◽  
X Ray ◽  
Aerial Parts ◽  
Full Structure

In addition to the already described peruvin (I), two further lactones, 3α-hydroxy-11αH,13-dihydrodamsin (II) and, 3α-acetoxy-11αH,13-dihydrodamsin (III), were isolated from aerial parts of species Ambrosia artemisiifolia L. The full structure of these lactones was derived from their NMR and CD spectra and the X-ray structural analysis of compound III. In the aerial part of Ambrosia trifida L. species coronopilin (V) and ivoxanthin (VI) were also identified.

scholarly journals Latitudinal and Longitudinal Trends of Seed Traits Indicate Adaptive Strategies of an Invasive Plant

2021 ◽  
Vol 12 ◽  
Author(s):  
Lifeng Zhou ◽  
Hongwei Yu ◽  
Kaiwen Yang ◽  
Li Chen ◽  
Wandong Yin ◽  
...  
Keyword(s):  
Invasive Plants ◽  
Performance Studies ◽  
Invasive Plant ◽  
Germination Rate ◽  
Adaptive Strategies ◽  
Seed Morphology ◽  
Ambrosia Artemisiifolia ◽  
Functional Ecology ◽  
Seed Traits ◽  
Highly Correlated

Invasive plants may change their seed traits to adapt to the environment and facilitate their performance. Studies on variation in seed traits among populations of an invader along latitudes/longitudes may assist in revealing how invasive plants cope with variable climates. In this study, we collected seeds of 26 populations of the global invasive plant Ambrosia artemisiifolia along ranges spanning 23° latitudes and 20° longitudes that are highly correlated in its invasive range in China. We measured over 20 seed traits, including seed morphology, phytohormone, nutrients, and germination, and investigated how the climate along the latitudes affects those traits. We found that germination time was significantly delayed with increasing latitude and longitude, while the reversed patterns were true for the germination rate. From low to high latitude, seed size, abscisic acid, and fatty acid were increased, likely affecting seed germination. Our analysis further demonstrated that temperature is the dominant driver of the variability in seed traits and germination. Germination rates of larger seeds in cold ranges were lower, while smaller seeds from warm ranges germinated faster, likely indicating adaptive strategies of the invasive plant in seed trait functional ecology. Together, our findings provide new insights into understanding the seed adaptation strategies during the invasion process and the underlying physiological and biochemical mechanisms involved.

scholarly journals The influence of Ambrosia trifida on vegetative production of A. artemisiifolia

2020 ◽  
Vol 35 (2) ◽  
pp. 105-115
Author(s):  
Aleksandra Savic ◽  
Ana Mileusnic ◽  
Danijela Pavlovic ◽  
Dragana Bozic ◽  
Sava Vrbnicanin
Keyword(s):  
Crop Yields ◽  
Dry Mass ◽  
Ambrosia Artemisiifolia ◽  
Average Height ◽  
Weed Species ◽  
Ambrosia Trifida ◽  
The Social ◽  
Giant Ragweed ◽  
Density Ratios ◽  
Agricultural Regions

Ambrosia artemisiifolia (common ragweed) and A. trifida (giant ragweed) are very important weed species that are invasive in Serbia and are often found in agricultural regions. When these weeds are present at high densities, crop yields can be significantly reduced or even completely destroyed. Unlike A. artemisiifolia, A. trifida is locally present in the Central Backa region (Vojvodina province), and it is expected that its area of distribution will expand in the future. Starting from the assumption that future distribution of A. trifida could take on larger proportions than now, the aim of this study was focused on examining the interaction between these two species. Experiments were conducted using the replacement design model, in which Ambrosia trifida/Ambrosia artemisiifolia per m2, were planted as density ratios of 10/0; 8/2; 4/6; 6/4; 2/8, and 0/10, in a completely randomized block system with four replications. The vegetative parameters (height and dry mass) of A. artemisiifolia were measured in July, August and September over a period of two years (2016 and 2017), and the results were statistically analysed in the Statistical Package for the Social Sciences (SPSS 23). In July 2016, the average height of A. artemisiifolia was in the range between 35.00 and 50.40 cm, in August it was from 68.00 to 95.50 cm, and between 83.75 and 99.80 cm in September. In the following season (2017), the corresponding values ranged from 56.19 to 78.50 (July), 98.38 to 125.50 cm (August) and 111.19 to 148.50 (September). An increase in the number of A. artemisiifolia plants and decrease in A. trifida counts per m2 caused an increase in the dry mass of A. artemisiifolia per plant. The dry mass of A. artemisiifolia ranged from 4.22 to 6.11 g/plant (July), 8.96 to 10.27 g/plant (August) and 7.04 to 19.53 g/plant (September). In the following season, these values ranged from 9.62 to 14.60 g/plant, 14.37 to 28.90 g/plant, and 23.43 to 40.47 g/plant in July, August and September, respectively. Minimum values of vegetative parameters were recorded in the treatment with 2 plants, and maximum in the treatment with 10 A. artemisiifolia plants/m2. This means that interspecific competition is more pronounced in this ragweed species than intraspecific competition.

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