Research contents: to reveal the biological mechanism of biological adaptation under extreme environmental conditions of cold and drought, and to excavate and utilize characteristic stress-resistant gene resources; It systematically monitored the biodiversity, community structure dynamics and soil-generative -gas material energy cycle of typical ecosystems in cold and dry regions, explored the diversity maintenance mechanism, and revealed the mechanism of community construction and ecosystem function formation. Illustrate the cold and arid regions of diversity, productivity, and degraded grassland and wetland restoration ability, the influence mechanism of water conservation, integrated optimization in line with the regional characteristics of degraded grassland and wetland restoration technology system and pattern, set up in cold and arid regions of typical ecosystems capacity of water conservation, biodiversity, ecological functions such as productivity and service value of scientific evaluation system, puts forward the key factor for maintaining regional ecological security and protection strategy of optimization scheme. To provide policy advice for national ecological civilization construction and regional development.
At present, the main progress has been made: (1) The current situation of glacier distribution in China has been investigated, and the process of the influence of glacier, frozen soil and snow cover in alpine region on the water conservation capacity of grassland has been systematically analyzed, and the influence of degraded wetland restoration on the water retention capacity of alpine meadow has been quantified; (2) Integrated the restoration technology of degraded wetland system and the technical system of improving water conservation and wetland carrying capacity, put forward the water resources security response strategy in the alpine region, defined the suitable sealing period of alpine meadow, and established the alpine degraded grassland restoration demonstration area; (3) in the cold area biodiversity survey, collection of excellent germplasm resources, the cold forage breeding arrow Kuo peas, revised the variety of grass seed production technology specification; The key genes of plants and animals adapted to the stress of low temperature and low oxygen in alpine ecosystem were explored. Established the grassland health evaluation index system based on CVOR as the core, developed the digital management decision support system for the balance of grass and livestock in Gansu pastoral area, and clarified the role of grassland in national food and ecological security. (5) Acquire more than 20 kinds of germplasm resources for ecological construction in alpine regions, and complete more than 10 technical systems for alpine vegetation construction and management; 20 alpine ecological restoration test demonstration zones have been established, covering an area of 100,000 mu. Ten new field observation and experiment bases were established for the alpine ecosystem.
Representative articles:
1. Hu, C., Y. Zhu, Y. Cui, K. Cheng, W. Liang, Z. Wei, M. Zhu, H. Yin, L. Zeng, Y. Xiao, M. Lv, J. Yi, S. Hou, K. He, J. Li, and X. Gou*, 2018: A group of receptor kinases are essential for CLAVATA signalling to maintain stem cell homeostasis. Nature Plants, 4, 205–211, doi:10.1038/s41477-018-0123-z.
2. 2. Qiu, Q., L. Wang, K. Wang, Y. Yang, T. Ma, Z. Wang, X. Zhang, Z. Ni, F. Hou, R. Long, R. Abbott, J. Lenstra, and J. Liu*, 2015: Yak whole-genome resequencing reveals domestication signatures and prehistoric population expansions. Nature Communications, 6, 10283, doi:10.1038/ncomms10283.
3. Ma, T., J. Wang, G. Zhou, et al. and J. Liu*, 2013: Genomic insights into salt adaptation in a desert poplar. Nature Communications, 4:2797, doi:10.1038/ ncomms3797.
4. Qiu, Q., G. Zhang, T. Ma, et al., 2012: The yak genome and adaptation to life at high altitude. Nature Genetics, 44, 946-949, doi:10.1038/ng.2343.
5. Deng, J., J. Ran, Z. Wang, Z. Fan, G. Wang, M. Ji, J. Liu, Y. Wang, J. Q. Liu, and J. H., Brown, 2012: Models and tests of optimal density and maximal yield for crop plants. Proc Natl Acad Sci U.S.A., 109: 15823–15828, doi: 10.1073/pnas.1210955109.
6. Deng, J., W. Zuo, Z. Wang, Z. Fan, M. Ji, G. Wang, J. Ran, C. Zhao, J. Liu, K. J. Niklas, S. T. Hammond, and J. H. Brown, 2012: Insights into plant size-density relationships from models and agricultural crops. Proc Natl Acad Sci U.S.A., 109: 8600-8605, doi: 10.1073/pnas.1205663109.
7. Zhang, X., Z. Nan*, C. Li, and K. Gao, 2014:Cytotoxic Effect of Ergot Alkaloids in Achnatherum inebrians Infected by the Neotyphodium gansuense Endophyte. J. Agric. Food Chem., 62 (30), 7419–7422, doi:10.1021/jf502264j.
8. Jian, S.*, C. Zhao, S. Fang, K. Yu, 2015:Effects of different vegetation restoration on soil water storage and water balance in the Chinese Loess Plateau. Agricultural and Forest Meteorology, 206, 85-96, doi: 10.1016/j.agrformet.2015.03.009.
9. Song, Q., Z. Nan*, K. Gao, H. Song, P. Tian, X. Zhang, C. Li, W. Xu, and X. Li, 2015:Antifungal, Phytotoxic, and Cytotoxic Activities of Metabolites from Epichloë bromicola, a Fungus Obtained from Elymus tangutorum Grass. J. Agric. Food Chem., 63 (40), 8787–8792, doi:10.1021/acs.jafc.5b04260.
10. Song, M., Q. Chai, X. Li, X. Yao, C. Li*, M. J. Christensen, and Z. Nan, 2015:An asexual Epichloë endophyte modifies the nutrient stoichiometry of wild barley (Hordeum brevisubulatum) under salt stress. Plant and Soil, 387(1-2), 153-165.
