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东北高寒地区麦田土壤动物数量的季节变化与环境因素关系的研究 总被引:24,自引:5,他引:19
东北高寒地区麦田土壤动物数量的季节变化与环境因素关系的研究苏永春,张崇邦,勾影波(黑龙江省克山师范专科学校,161601)RelationshipBetweenseasonalQuantitativeVariationofSoilAnimalsinW... 相似文献
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Linzhong Zhang Hongdong Xuan Yongchun Zuo Gaojian Xu Ping Wang Youhong Song Shihua Zhang 《Functional & integrative genomics》2016,16(3):243-251
A great number of microRNAs (miRNAs) have been identified in responding and acting in gene regulatory networks associated with plant tolerance to abiotic stress conditions, such as drought, salinity, and high temperature. The topological exploration of target genes regulated by abiotic-stress-responsible miRNAs (ASRmiRs) in a network facilitates to discover the molecular basis of plant abiotic stress response. This study was based on the staple food rice (Oryza sativa) in which ASRmiRs were manually curated. After having compared the topological properties of target genes (stress-miR-targets) with those (non-stress-miR-targets) not regulated by ASRmiRs in a rice interactome network, we found that stress-miR-targets exhibited distinguishable topological properties. The interaction probability analysis and k-core decomposition showed that stress-miR-targets preferentially interacted with non-stress-miR-targets and located at the peripheral positions in the network. Our results indicated an obvious topological distinction between the two types of genes, reflecting the specific mechanisms of action of stress-miR-targets in rice abiotic stress response. Also, the results may provide valuable clues to elucidate molecular mechanisms of crop response to abiotic stress. 相似文献
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MethodsFrom January 2010 to December 2012, 587 consecutive cases undergoing McKeown-type esohpageactomy were retrospectively identified from a prospectively maintained database.ResultsAfter propensity-matching, incorporating baseline characteristics, 178 cases were included in each group, and patients characteristics distributions were well-balanced between two groups. Compared with intravenous analgesia, the use of EDA significantly decreased the incidence of pneumonia from 32% to 19.7% (P = 0.008), and anastomotic leakage from 23.0% to 14.0% (P = 0.029). The change in CRP level of EDA group was significantly decreased (preoperative, 6.2 vs. 6.2; POD 1, 108.1 vs. 121.3; POD 3, 131.5 vs. 137.8; POD 7, 69.3 vs. 82.1 mg/L; P = 0.044). EDA patients had a significantly longer duration of indwelling urinary catheter (P<0.001), and lower levels in both systolic (P = 0.001) and diastolic blood pressure (P<0.001). There weren''t significant differences in overall survival (log-rank P = 0.47) and recurrence (Gray-test P = 0.46) between two groups.ConclusionsThese findings revealed that EDA could attenuate inflammatory response and reduce the incidence of pneumonia and anastomotic leakage after esophagectomy, at the price of delayed urinary catheter removal and lower blood pressure. EDA remains an important component of multimodal perioperative management after esophagectomy. 相似文献
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Minkai Yang Fuhe Luo Yuchen Song Shenglin Ma Yudi Ma Aliya Fazal Tongming Yin Guihua Lu Shucun Sun Jinliang Qi Zhongling Wen Yongchun Li Yonghua Yang 《Microbial biotechnology》2022,15(12):2942-2957
Plant roots significantly influence soil microbial diversity, and soil microorganisms play significant roles in both natural and agricultural ecosystems. Although the genetically modified (GM) crops with enhanced insect and herbicide resistance are thought to have unmatched yield and stress resistance advantages, thorough and in-depth case studies still need to be carried out in a real-world setting due to the potential effects of GM plants on soil microbial communities. In this study, three treatments were used: a recipient soybean variety Jack, a triple transgenic soybean line JD321, and the glyphosate-treated JD321 (JD321G). Three sampling stages (flowering, seed filling and maturing), as well as three host niches of soybean rhizosphere [intact roots (RT), rhizospheric soil (RS) and surrounding soil (SS)] were established. In comparison to Jack, the rhizospheric soil of JD321G had higher urease activity and lower nitrite reductase at the flowering stage. Different treatments and different sampling stages existed no significant effects on the compositions of microbial communities at different taxonomic levels. However, at the genus level, the relative abundance of three plant growth-promoting fungal genera (i.e. Mortierella, Chaetomium and Pseudombrophila) increased while endophytic bacteria Chryseobacterium and pathogenic bacteria Streptomyces decreased from the inside to the outside of the roots (i.e. RT → RS → SS). Moreover, two bacterial genera, Bradyrhizobium and Ensifer were more abundant in RT than in RS and SS, as well as three species, Agrobacterium radiobacter, Ensifer fredii and Ensifer meliloti, which are closely related to nitrogen-fixation. Furthermore, five clusters of orthologous groups (COGs) associated to nitrogen-fixation genes were higher in RT than in RS, whereas only one COG annotated as dinitrogenase iron-molybdenum cofactor biosynthesis protein was lower. Overall, the results imply that the rhizosphere host niches throughout the soil–plant continuum largely control the composition and function of the root-associated microbiome of triple transgenic soybean. 相似文献
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Li Yongchun Li Yongfu Chang Scott X. Xu Qiufang Guo Zhiying Gao Qun Qin Ziyan Yang Yunfeng Chen Junhui Liang Xue 《Plant and Soil》2017,415(1-2):507-520
Plant and Soil - Loss of biodiversity caused by intensive agriculture is a major worldwide concern. Crop rotation can enhance crop productivity and increase soil microbial diversity. However, the... 相似文献
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为提高非洲菊增殖培养的效率并降低生产能耗,通过发光二极管(LED)设置不同比例的红蓝光组合,研究光质对非洲菊离体培养增殖阶段的影响,通过对丛生苗形态指标和生理生化指标的测定,筛选出最适LED光质条件,并初步探讨其生理机制。结果显示:(1)不同LED光质条件下,非洲菊组培苗的增殖系数差异显著,其中RB4(红蓝光比例为4∶1)处理显著高于其他处理。(2)丛生苗的株高在复合光处理下显著低于R(单一红光)和B(单一蓝光)处理;鲜重和干重在红蓝复合光RB2、RB4、RB8(红蓝光比例分别为2∶1、4∶1和8∶1)处理下均显著高于R、B和对照处理。(3)RB4处理下丛生苗的可溶性糖含量显著高于其他处理,比对照提高了89.62%。(4)LED复合光处理下丛生苗的丙二醛含量显著低于对照,并呈现随红光比例增加而不断降低的趋势;RB2、RB4和RB8处理的超氧化物歧化酶活性显著低于其他处理;除R处理外,其他LED光质处理的丛生苗过氧化氢酶活性均显著高于对照,并以RB4处理丛生苗过氧化氢酶活性最强。研究表明,RB2、RB4和RB8处理有助于提高非洲菊组培苗的增殖系数和干鲜重,并能够促进可溶性糖含量的增加,增强植株自身对活性氧的解毒能力,减轻植株的膜脂过氧化作用,且以RB4处理表现最优,其非洲菊丛生苗的增殖系数和可溶性糖含量显著高于其他处理,干鲜重和过氧化氢酶活性均为最高,丙二醛含量显著低于除单一红光外的其他处理。 相似文献
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骨髓(BM)移植已在许多血液病中成功应用多年,主要依赖于成人BM和外周血(PB)中的造血干细胞(HSCs)。然而,合适配型HSCs的稀缺限制了其临床应用,难以满足更多有需要的患者。诱导多能干细胞(iPSCs)的出现,有望解决这一难题。iPSCs具有分化成所有血细胞的潜能,使得HSCs和其他血细胞在血液病中的广泛应用成为可能。然而,临床应用iPSCs治疗血液病仍障碍重重。本文主要回顾了iPSCs在血液病中的应用和发展以及面临的问题和挑战。 相似文献