期刊:
Journal of Investigative Medicine,2014年62(2):1675-1685 ISSN:1081-5589
通讯作者:
Song, T.
作者机构:
[Liu, Yan; Cai, Desuo] Guangxi Univ, Coll Civil Engn & Architecture, Nanning 530004, Peoples R China.;[Liu, Yan; Zeng, Fu-ping; Song, Tongqing; Song, Min; Du, Hu; Peng, Wanxia] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China.;[Liu, Yan; Zeng, Fu-ping; Song, Tongqing; Song, Min; Du, Hu; Peng, Wanxia] Chinese Acad Sci, Huanjiang Observat & Res Stn Karst Ecosyst, Huanjiang 547100, Peoples R China.;[Song, Min] Hunan Agr Univ, Dept Grass Sci, Coll Agr, Changsha 410125, Hunan, Peoples R China.
通讯机构:
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
会议名称:
2nd International Conference on Biomedicine and Pharmaceutics (ICBP)
摘要:
Land-use change can have great influences on soil conditions and microbes are likely respond to these changes. However, such responses are poorly characterized as few studies have examined how changes in soil microbes do, or do not, correlate with environmental factors across land-use types. Soil microbial, conventional, and mineral properties and vegetation were investigated and analyzed under farmland, grassland, brush, plantation forest, secondary forest, and primary forest in the karst region of southwest China. Soil main microbial populations varied among land-use types, total populations were large in the primary forest and farmland, and low in the plantation forest. The three forests had a higher proportion of bacteria, and other types had a higher proportion of actinomycetes, while all the types had a low proportion of fungi. Soil microbial biomass carbon (MBC), nitrogen (MBN), and phosphorus (MBP) were highest in primary forest. Only MBC and microbial populations had a perfect fractal relationship. MBC had closest relationships with Shannon index in tree layer and TN, Fe2O3, and CaO. Soil microbial biomass was high, while microbial status was perfect in the primary forest. Microorganisms were significantly correlated with vegetation, soil nutrients, and minerals following land utilization types in the karst region of China.
摘要:
Rice diseases caused by fungi, bacteria and viruses are one of the major constraints for sustainable rice (Oryza sativa L.) production worldwide. The use of resistant cultivars is considered the most economical and effective method to control rice diseases. In the last decade, a dozen resistance genes against the fungal pathogen Magnaporthe grisea and the bacterial pathogen Xanthomonas oryzae pv. oryzae have been cloned. Approximately half of them encode nuclear binding site (NBS) and leucine rich repeat (LRR)-containing proteins, the most common type of cloned plant resistance genes. Interestingly, four of them encode novel proteins which have not been identified in other plant species, suggesting that unique mechanisms might be involved in rice defense responses. This review summarizes the recent advances in cloning and characterization of disease resistance genes in rice and presents future perspectives for in-depth molecular analysis of the function and evolution of rice resistance genes and their interaction with avirulence genes in pathogens.