In complex environments, microbes interact with a wide range of organisms, including unicellular and multicellular ones. Such interactions are complex and dynamic, and often
involve signal e mostly biochemicals e exchange between the interacting organisms. Since several years, the capacity of bacteria to synchronize at population level the expression of some keyfunctions has been evidenced: some plant and animal pathogens may exchange signals such as N acylhomoserine lactones (NAHL) to collectively regulate expression of the virulence factors. In this issue, an original work reports that the functional diversity of the rhizosphere bacterial population may be biased to stimulate growth of natural beneficial subpopulations
which are able to cleave NAHL signal, and to potentially provide a microbial environment capable to protect plants of economical interests from pathogens (Cirou et al., 2011). Metabolic diversity of microbes may be also used to identify relevant genes and functions which may be used for biotechnological purposes, including the development of transgenic plants degrading NAHL signals, the environmental impact of which has to be evaluated (D’Angelo-Picard et al., 2011). Natural metabolites produced by microbes are also critical for human health, but also for equilibrium of several communities in the environment. A great interest was recently directed at microeucaryotes because of their rapid growth in coastal environments and the sanitary outcomes that these types of “bloom” generate. The mechanisms allowing dinoflagellates from the genus Alexandrium to rapidly invade a Mediterranean lagoon (Chambouvet et al., 2011), as well the activity of toxins produced by diatoms (Lelong et al., 2011; Leflaive and TenHage, 2011) are discussed in the three cited papers.
ในสภาพแวดล้อมที่ซับซ้อน จุลินทรีย์โต้ตอบกับสิ่งมีชีวิต รวม unicellular และสิ่ง โต้ตอบดังกล่าวจะซับซ้อน และแบบ ไดนามิก และมักจะเกี่ยวข้องกับสัญญาณอีส่วนใหญ่ biochemicals e แลกเปลี่ยนระหว่างสิ่งมีชีวิต interacting ตั้งแต่หลายปี กำลังการผลิตของแบคทีเรียให้ตรงกันระดับประชากรนิพจน์ของบาง keyfunctions มีการรับการเป็นหลักฐาน: โรคพืชและสัตว์บางอย่างอาจแลกเปลี่ยนสัญญาณเช่น lactones acylhomoserine N (NAHL) เพื่อควบคุมค่าของปัจจัย virulence โดยรวมได้ ในปัญหานี้ ต้นฉบับรายงานว่า อาจลำเอียงทำงานความหลากหลายของประชากรแบคทีเรียไรโซสเฟียร์เพื่อกระตุ้นการเจริญเติบโตของธรรมชาติประโยชน์ subpopulations ที่ทำงานwhich are able to cleave NAHL signal, and to potentially provide a microbial environment capable to protect plants of economical interests from pathogens (Cirou et al., 2011). Metabolic diversity of microbes may be also used to identify relevant genes and functions which may be used for biotechnological purposes, including the development of transgenic plants degrading NAHL signals, the environmental impact of which has to be evaluated (D’Angelo-Picard et al., 2011). Natural metabolites produced by microbes are also critical for human health, but also for equilibrium of several communities in the environment. A great interest was recently directed at microeucaryotes because of their rapid growth in coastal environments and the sanitary outcomes that these types of “bloom” generate. The mechanisms allowing dinoflagellates from the genus Alexandrium to rapidly invade a Mediterranean lagoon (Chambouvet et al., 2011), as well the activity of toxins produced by diatoms (Lelong et al., 2011; Leflaive and TenHage, 2011) are discussed in the three cited papers.
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