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Guo Dali, Ma Zeqing and Xu Xingliang research team of institute of geosciences and resources of the Chinese Academy of Sciences, after 14 years of efforts, constructed a database of root attributes of 369 species in the world, which systematically revealed the large-scale biogeographic pattern of plant absorption root functional properties, and for the first time clarified the organization of plant root evolution.
research published in The Journal of the History syresolves global organization of root functional.
for a long time, the theoretical framework of plant evolution is mainly based on the understanding of the upper part of the leaves, flowers and other places, but little is known about how the structure and function of the underground part of the root system are organized in the course of evolution.
research team has proposed a new theory of plant evolution: "During the 400 million-year-old plant evolution, underground absorption roots have evolved in a more efficient and independent direction, playing an important role in the development of new habitats for species and promoting plant transmission and evolution."
from tropical rainforests to deserts, plant absorption roots are becoming thinner as a whole, tending to be more flexible and less dependent on symbiotic fungi. through
, the efficiency of the acquisition of nutrients by plant unit carbon investment is optimized, so that it can efficiently capture the nutrients and water resources that are fleeting, and enhance the adaptability and viability of plant species to the environment.
in tropical rainforests where water supply is adequate, root design reduces the need for hydraulic safety, the coexistence of fine and coarse-root species, the preservation of many older, systematically developed species, and in grasslands and deserts where water stress is strong, the diversity of the root system decreases due to the instability of seasonal resource availability.
the study, which untangles some of the hidden "underground rules" of plant survival and dissemination, is critical to understanding plant underground resource acquisition strategies, biogeochemical cycle simulations, and plant diversity conservation; explains "why some ancient rough-root species have had difficulty in leaving stable, moist habitats during evolution and are easily eliminated during evolution."
, the theory can also be applied to the actual ecological protection work, for example, some more small roots, more efficient absorption plants are likely to become invasive species. Dr.
Ma Zeqing, researcher Guo Dali and Lars Hedin, a professor at Princeton University, co-authors of the paper, with Guo Dali and Lars Hedin as the communications authors and geographic resources as the first completion unit.
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