Age and activation of microbial communities in soils under burial mounds and in recent surface soils of steppe zone

Demkina T. S.; Khomutova T. E.; Kashirskaya N. N.; Demkina E. V.; Stretovich I. V.; El-Registan G. I.; Demkin V. A.

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Age and activation of microbial communities in soils under burial mounds and in recent surface soils of steppe zone

机译：土墩下土壤和最近草原地区土壤中微生物群落的年龄和活化

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Chestnut paleosols buried under steppe kurgans about 4800, 4000, and 2000 years ago and their background analogues were studied in the dry steppe zone on the Volga-Don interfluve. Morphological, chemical, microbiological, biochemical, and radiocarbon studies were performed. Paleoclimatic conditions in the region were reconstructed on the basis of paleosol data. The ages of microbial fractions isolated from the buried and surface soils were determined using the method of C-14 atomic mass-spectrometry. It reached 2100 years in the A1 horizon of the buried paleosol, which corresponded to the archaeological age of the kurgan (1st century AD). The ages of microbial biomass isolated from the B2 horizons of the buried paleosol and the background surfacesoil comprised 3680 +/- 35 and 3300 +/- 30 years, respectively. The obtained data confirmed our assumption about preservation of microorganisms of the past epochs in the paleosols buried under archaeological monuments. It is ensured by various mechanismsof adaptation of soil microbial communities to unfavorable environmental conditions (anabiosis, transformation of bacteria into nanoforms, etc.). The possibility to stimulate germination of the ancient dormant microbial pool isolated from the buried paleosols by 2-3 orders of magnitude with the use of beta-indolyl-3-acetic acid as a signal substance was demonstrated.

机译：在伏尔加河-顿河道交汇处的干草原地带，研究了约4800、4000和2000年前埋在草原kurgans下的栗树古土壤及其背景类似物。进行了形态学，化学，微生物学，生化和放射性碳研究。根据古土壤数据重建了该地区的古气候条件。使用C-14原子质谱法确定从埋藏土壤和表层土壤中分离出的微生物组分的年龄。它在埋藏的古土壤的A1层达到了2100年，这对应于库尔干的考古时代（公元1世纪）。从埋藏的古土壤和背景表面土壤的B2层中分离出来的微生物生物质的年龄分别为3680 +/- 35和3300 +/- 30年。获得的数据证实了我们对保存在考古遗迹下的古土壤中过去时期的微生物的保存的假设。土壤微生物群落适应不利环境条件（厌氧菌，细菌转变为纳米形式等）的各种机制确保了这一点。证明了使用β-吲哚基-3-乙酸作为信号物质，可以使从埋藏的古土壤中分离出来的古老休眠微生物库萌发2-3个数量级的发芽的可能性。

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《Eurasian Soil Science》 |2008年第13期|共9页
作者
Demkina T. S.; Khomutova T. E.; Kashirskaya N. N.; Demkina E. V.; Stretovich I. V.; El-Registan G. I.; Demkin V. A.;
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正文语种 eng
中图分类土壤学;
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paleoclimatic condition; microbial biomass age; soil microbial community adaptation; unfavorable environmental condition; kurgan archaeological age; buried paleosol dats; soil biochemical study; soil microbiological study;

机译：古气候条件;微生物生物量年龄;土壤微生物群落适应性;不利的环境条件;库尔干考古年龄;埋古土壤sol虫;土壤生化研究;土壤微生物学研究;

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1. Age and activation of microbial communities in soils under burial mounds and in recent surface soils of steppe zone [J] . Demkina T. S., Khomutova T. E., Kashirskaya N. N., Eurasian Soil Science . 2008,第13期

机译：土墩下土壤和最近草原地区土壤中微生物群落的年龄和活化
2. Comparative Characterization of Microbial Communities in Kurgans, Paleosols Buried under Them, and Background Surface Soils in the Steppe Zone of the Lower Volga Region [J] . T. S. Demkina, A. V. Borisov, M. V. Eltsov, Eurasian Soil Science . 2007,第6期

机译：伏尔加河下游草原地区库尔干斯，埋在地下的古土壤和背景表层土壤中微生物群落的比较特征
3. Assessment of the living and total biomass of microbial communities in the background chestnut soil and in the paleosols under burial mounds. [J] . Khomutova T. E., Kashirskaya N. N., Demkin V. A. Eurasian Soil Science . 2011,第12期

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Age and activation of microbial communities in soils under burial mounds and in recent surface soils of steppe zone

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