Why is a yellow flower rampant in Canada?

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This "uninvestred guest" is native to the temper belt region of North America and is one of the most harmful invasive plants in China. Recently, The team of Qiang Sheng, a professor in the Weed Research Office of Nanjing Agricultural University, revealed that a yellow flower of exotic weeds in Canada enhances heat resistance differentiation by multiplying, driving its distribution from temperate to equatorial reverse expansion. The paper was published online in the Journal of Ecology.of more than 300 kinds of invasive alien plants in China, belonging to 67 departments, of which the largest number of chrysanthemums. Serious hazards such as a Canadian yellow flower, purple stem Zelan, aircraft grass, micro chamomile, in addition to hollow lotus grass, phoenix lotus and so on.
a bright yellow flower in Canada, originally introduced into our country as a courtyard ornamental plant, but became an "ecological killer". In addition to being distributed in North America, extensive invasions of Europe and East Asia, especially in China's subtropical monsoon climate zone, caused serious ecological disasters.
" Canadian yellow flower is highly invasive. Qiang Sheng told the China Science Daily, "The root of the species developed, once planted is difficult to eradicate, it is very easy to form a single advantage in the invasive habitat community, seriously crowding out the growth of native species, resulting in the homogenization of the habitat, thereby affecting local biodiversity, endangering the local natural landscape, community evolution." The
of invasive invasive plants mainly from its invasive biological mechanism, intrusion and diffusion dynamics and geographical distribution pattern, ecological consequences after invasion and its prevention and control management. The study of a yellow flower in Canada originated at the end of the last century.
However, Qiang Sheng pointed out that the relevant research has not been systematic and in-depth, long troubled by the academic community to invade a yellow flower population in Canada doubled in height, the full formation of single-optimal communities, seriously reduce the biodiversity of invasive habitats and other rampant mechanisms, it is not clear.
After more than a decade of research, Johnson led a team of 2,062 canadian yellow flower material from 471 samples around the world of cell geography analysis, the first time to reveal that the current invasion of China and rampant Canadian yellow flower is all polyxer (mainly hexome), while the origin is mainly due to the double, the double population can only invade Europe and East Asia temperate regions.In-depth study by theteam found that the species' multiplied level was significantly negatively related to the latitude distribution and positively related to temperature, and that the 20c-24C isothermal line was the differentiation zone of the invasive climate ecologicality of the double and polyhedes, which was the result of the species' increased heat resistance driven by estogenization.
" is its main intrusion mechanism. Canada's yellow flower polypliers are getting taller and more competitive. Cheng Jiliang, co-first author of the paper, said.Using six geographic cell types of origin and invasion, the
team demonstrated that homogeneity garden experiments in Georgia and Nanjing, China, showed that polypoxages, especially invasive polypolytes, evolved more effective heat-resistant physiological mechanisms, where polypoxes efficiently remove reactive oxygen through antioxidant enzymes, while the compound relied more on the generation of antioxidants to cope with thermal stress.the
study found that the key to successful invasion is the double in the summer high temperature climate embryo decay led to flowering, invasive polyplus can withstand high temperatures so that the embryo's normal development to produce fertile seeds, and they also significantly delay the autumn temperature drop when the flowering, through the high temperature avoidance mechanism in more suitable climate conditions to produce a large number of seeds, drift with the wind, rapid spread.
said the evolution of heat resistance and sexual reproductive characteristics of this dependence is the result of a joint effect of pre-adaptation and rapid post-invasion evolution. This is the first case to reveal the key in-house elements of a successful invasion of exotic plants.
" the species' range of living areas will continue to expand with global warming. Li Jun, co-first author of the paper, said it is predicted that in the context of global warming, its potential distribution will continue to expand and continue to expand from temper zone to subtropical on a global scale. This suggests that the invasion and expansion of a yellow flower in Canada will pose a more serious challenge to global biodiversity conservation.
This study not only provides the first case for temperate origin plants to reverse-expand the distribution range through esomodypic multiply, but also provides new ideas for studying strategies to cope with global change and accelerated decline in diversity.countries have invested a lot of manpower and material resources to prevent and control a yellow flower in Canada, but due to its strong reproductive and expansion capacity, little effect. This research provides a theoretical basis and scientific basis for the prevention and control and management of a yellow flower in Canada.
, a Canadian yellow flower, commonly known as the "yellow flower", is full of doubles. The reason flower farmers choose to grow the double is that they bloom early and can collect fresh cut flowers earlier. Since it is not currently intrusive south of the 24c iso-temperature line, it can be allowed to be planted.
said the original policy of controlling commercial cultivation of a yellow flower in Canada could be adjusted in the subtropical region. However, planting in the northeast, north-west, northwest, southwest and other climate-similar areas north of the 20C iso-temperature line is a risk of escape and should be strictly prohibited.
In addition," the team developed a whole small nuclear microbial herbicide product, yellowing, which effectively eradicates a yellow flower in Canada and is relatively safe for other plants, thus rapidly restoring the habitat biodiversity loss caused by the invasion of a yellow flower in Canada. "Strong win introduction.
team has long adhered to the research on invasive alien plants and their management, and played a major role in the management of exotic and quarantine weeds in China and the world.
" Next, we will conduct an in-depth study of the chemical effects, asexual reproduction capacity and heat-resistant molecular mechanisms of a yellow flower in Canada, with a view to fully and systematically revealing the mechanism of a successful invasion of a yellow flower in Canada. He said. (Source: Wang Fang, China Science Journal)
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