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Herbivore performance and plant defense after sequential attacks by inducing and suppressing herbivores
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作者 Elisa Faria de Oliveira Angelo Pallini Arne Janssen 《昆虫科学:英文版》 SCIE CAS CSCD 2019年第1期108-118,共11页
It is well known that herbivore-induced plant defenses alter host plant quality and can affect the behavior and performance of later arriving herbivores.Effects of sequential attacks by herbivores that either suppress... It is well known that herbivore-induced plant defenses alter host plant quality and can affect the behavior and performance of later arriving herbivores.Effects of sequential attacks by herbivores that either suppress or induce plant defenses are less well studied.We sequentially infested leaves of tomato plants with a strain of the phytophagous spider mite Tetranychus urticae that induces plant defenses and the closely related Tetranychus evansi, which suppresses plant defenses.Plant quality was quantified through oviposifion of both spider mite species and by measuring proteinase inhibitor activity using plant material that had been sequentially attacked by both herbivore species.Spider-mite oviposifion data show that T.evansi could suppress an earlier induction of plant defenses by T.urticae,and T.urticae could induce defenses in plants previously attacked by T.evansi in 1 day.Longer attacks by the second species did not result in further changes in oviposifion.Proteinase inhibitor activity levels showed that T.evansi suppressed the high activity levels induced by T.urticae to constitutive levels in 1 day,and further suppressed activity to levels similar to those in plants attacked by T.evansi alone.Attacks by T.urticae induced proteinase inhibitor activity in plants previously attacked by T.evansi,eventually to similar levels as induced by T.urticae alone.Hence,plant quality and plant defenses were significantly affected by sequential attacks and the order of attack does not affect subsequent performance,but does affect proteinase inhibitor activity levels.Based on our results,we discuss the evolution of suppression of plant defenses. 展开更多
关键词 PLANT defense plant-herbivore interactions PLANT quality SEQUENTIAL attack TETRANYCHUS evansi TETRANYCHUS urticae
嘟噜河湿地自然保护区植物多样性的研究 预览
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作者 徐乐 《防护林科技》 2019年第4期30-33,共4页
通过对黑龙江省嘟噜河湿地自然保护区维管植物的调查,对该区河流湿地植物的物种组成、结构和群落类型及分布进行了分析。结果表明:黑龙江省嘟噜河湿地植被划分7个群落类型(Ⅰ湿地灌丛、Ⅱ典型草甸、Ⅲ沼泽化草甸、Ⅳ草本沼泽、Ⅴ沉水型... 通过对黑龙江省嘟噜河湿地自然保护区维管植物的调查,对该区河流湿地植物的物种组成、结构和群落类型及分布进行了分析。结果表明:黑龙江省嘟噜河湿地植被划分7个群落类型(Ⅰ湿地灌丛、Ⅱ典型草甸、Ⅲ沼泽化草甸、Ⅳ草本沼泽、Ⅴ沉水型草塘、Ⅵ浮叶型草塘和Ⅶ挺水型草塘)。物种丰富度指数范围为3.6~14.3;物种均匀度指数变化范围为0.75~0.93,多样性指数变化范围为0~0.84,群落间的相似性总体较低。 展开更多
关键词 嘟噜河 湿地 自然保护区 植物 植物多样性
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Plant Genome Editing Database (PGED): A Call for Submission of Information about Genome-Edited Plant Mutants
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作者 Yi Zheng Ning Zhang +1 位作者 Gregory B. Martin Zhangjun Fei 《分子植物:英文版》 SCIE CAS CSCD 2019年第2期127-129,共3页
Recent advances in genome editing technologies, particularly CRISPR/Cas, enable the alteration of DNA sequences to produce deletions, insertions, and substitutions in genes (Jaganathan et al., 2018), as well as large ... Recent advances in genome editing technologies, particularly CRISPR/Cas, enable the alteration of DNA sequences to produce deletions, insertions, and substitutions in genes (Jaganathan et al., 2018), as well as large or entire chromosome deletions in the genomes of plants and animals (Zhou et al., 2014;Adikusuma et al., 2017). 展开更多
关键词 PLANT GENOME EDITING DATABASE (PGED) Genome-Edited PLANT MUTANTS
广西交通职业技术学院四塘校区植物造景分析 预览
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作者 黄月明 王新 《安徽农业科学》 CAS 2019年第3期90-93,157共5页
通过对广西交通职业技术学院四塘校区的实地调查及各种文献资料的分析研究,基于此校园功能分区,分析入口区、教学区、学生生活区、办公区、运动区、道路绿化区等区域的植物景观,并总结其景观营造特色,分析存在的问题,提出相应的对策,为... 通过对广西交通职业技术学院四塘校区的实地调查及各种文献资料的分析研究,基于此校园功能分区,分析入口区、教学区、学生生活区、办公区、运动区、道路绿化区等区域的植物景观,并总结其景观营造特色,分析存在的问题,提出相应的对策,为其他校园的植物景观营造提供借鉴。 展开更多
关键词 植物 植物造景 造景分析
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Progress and prospects of innovative coal-fired power plants within the energy internet
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作者 Yongping Yang Chengzhou Li +1 位作者 Ningling Wang Zhiping Yang 《全球能源互联网:英文版》 2019年第2期160-179,共20页
The development of electrical engineering and electronic, communications, smart power grid, and ultra-high voltage transmission technologies have driven the energy system revolution to the next generation: the energy ... The development of electrical engineering and electronic, communications, smart power grid, and ultra-high voltage transmission technologies have driven the energy system revolution to the next generation: the energy internet. Progressive penetration of intermittent renewable energy sources into the energy system has led to unprecedented challenges to the currently wide use of coal-fired power generation technologies. Here, the applications and prospects of advanced coal-fired power generation technologies are analyzed. These technologies can be summarized into three categories:(1) large-scale and higher parameters coal-fired power generation technologies, including 620/650/700 oC ultra-supercritical thermal power and double reheat ultra-supercritical coal-fired power generation technologies;(2) system innovation and specific, highefficiency thermal cycles, which consist of renewable energy-aided coal-fired power generation technologies, a supercritical CO2 Brayton cycle for coal-fired power plants, large-scale air-cooling coal-fired power plant technologies, and innovative layouts for waste heat utilization and enhanced energy cascade utilization;(3) coal-fired power generation combined with poly-generation technologies, which are represented by integrated gasification combined cycle(IGCC) and integrated gasification fuel cell(IGFC) technologies. Concerning the existing coal-fired power units, which are responsible for peak shaving, possible strategies for enhancing flexibility and operational stability are discussed. Furthermore, future trends for coal-fired power plants coupled with cyber-physical system(CPS) technologies are introduced. The development of advanced, coal-fired power generation technologies demonstrates the progress of science and is suitable for the sustainable development of human society. 展开更多
关键词 En ergy In ternet Coal-fired POWER GEN eration FLEXIBILITY Cyber-physical system Smart POWER plant
PPR蛋白在植物生长发育中的作用 预览
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作者 王婉珍 任育军 缪颖 《热带亚热带植物学报》 CAS CSCD 北大核心 2019年第2期225-234,共10页
PPR蛋白在陆生植物中属于最大的蛋白家族之一,其成员种类和数量均十分庞大。PPR蛋白主要的功能是通过在多种细胞器中进行定位从而参与细胞核和细胞器中特异单链RNA的转录后修饰和编辑,在植物生长发育的多个阶段均发挥着重要的作用。多数... PPR蛋白在陆生植物中属于最大的蛋白家族之一,其成员种类和数量均十分庞大。PPR蛋白主要的功能是通过在多种细胞器中进行定位从而参与细胞核和细胞器中特异单链RNA的转录后修饰和编辑,在植物生长发育的多个阶段均发挥着重要的作用。多数PPR蛋白编码基因的突变体呈现异常的发育表型,如胚胎致死、发育迟缓及绿化延迟等。对近年来植物PPR蛋白的分类、定位、RNA修饰的机制及其对植物生长发育影响进行了综述,并展望了植物PPR发挥功能区域和参与的调控网络研究。 展开更多
关键词 植物 生长发育 PPR蛋白 RNA修饰 发育表型 综述
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植物对硒的吸收利用及主要农作物硒生物强化研究进展 预览
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作者 李秀启 尹国红 +2 位作者 郝浩浩 贾宝华 牛小沛 《甘肃农业科技》 2019年第4期65-71,共7页
从硒对植物的作用、植物对硒的吸收利用、硒肥的应用效果、主要农作物硒生物强化等方面综述了国内外相关研究进展,并对今后的研究方向进行了展望。
关键词 植物 吸收 作物硒强化
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Effects of plant diversity on greenhouse gas emissions in microcosms simulating vertical constructed wetlands with high ammonium loading
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作者 Wenjuan Han Guiying Luo +4 位作者 Bin Luo1 Chenchen Yu Hai Wang Jie Chang Ying Ge 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第3期229-237,共9页
Wastewater with relatively high nitrogen concentrations is a major source of nitrous oxide(N2O) and methane(CH4) emissions and exerts multiple stresses on the environment.Studies have shown that plant diversity plays ... Wastewater with relatively high nitrogen concentrations is a major source of nitrous oxide(N2O) and methane(CH4) emissions and exerts multiple stresses on the environment.Studies have shown that plant diversity plays an important role in ecosystem functioning.However, the effects of plant species diversity on CH4 and N2O emissions under high ammonium(NH4+-N) loading rates remain unclear. In this study, a microcosm experiment simulating vertical constructed wetlands supplied with high NH4+-N water levels was established. The treatments included four species richness levels(1, 2, 3, 4) and 15 species compositions. There was no significant relationship between species richness and N2O emissions. However, N2O emissions were significantly reduced by specific plant species composition. Notably, the communities with the presence of Rumex japonicus L. reduced N2O emissions by 62% compared to communities without this species. This reduction in N2O emissions may have been a result of decreased N concentrations and increased plant biomass. CH4 emissions did not respond to plant species richness or species identity.Overall, plant species identity surpassed species richness in lowering N2O emissions from constructed wetlands with high NH4+-N water. The results also suggest that communities with R. japonicus could achieve higher N removal and lower greenhouse gas emissions than other wetland species. 展开更多
关键词 Plant SPECIES richness SPECIES identity Methane Nitrous oxide Nitrogen removal Ecosystem FUNCTIONING
青蒿素对植物化感效应研究进展 预览
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作者 郭美薇 刘凡铭 吕建洲 《作物研究》 2019年第1期82-85,共4页
青蒿素是一种由部分蒿属植物产生的倍半萜内酯,是一种有效的抗疟疾药物,对癌症、肝炎和血吸虫病等均有疗效。植物化感作用是植物(含微生物)通过释放化学物质到环境中对其它植物产生的直接或间接的有害作用。综述了青蒿素的合成、影响青... 青蒿素是一种由部分蒿属植物产生的倍半萜内酯,是一种有效的抗疟疾药物,对癌症、肝炎和血吸虫病等均有疗效。植物化感作用是植物(含微生物)通过释放化学物质到环境中对其它植物产生的直接或间接的有害作用。综述了青蒿素的合成、影响青蒿素化感效应的因素及释放途径、青蒿素对土壤成分及植物生长的影响等方面的研究成果,并指出了进一步的研究方向。 展开更多
关键词 青蒿素 植物 生长调节 化感作用
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Response of C and N cycles to N fertilization in Sphagnum and Molinia-dominated peat mesocosms
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作者 Fabien Leroy Sébastien Gogo +6 位作者 Christophe Guimbaud André-Jean Francez Renata Zocatelli Christian Défarge Léonard Bernard-Jannin Zhen Hu Fatima Laggoun-Défarge 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第3期264-272,共9页
Plant communities play an important role in the C-sink function of peatlands. However,global change and local perturbations are expected to modify peatland plant communities,leading to a shift from Sphagnum mosses to ... Plant communities play an important role in the C-sink function of peatlands. However,global change and local perturbations are expected to modify peatland plant communities,leading to a shift from Sphagnum mosses to vascular plants. Most studies have focused on the direct effects of modification in plant communities or of global change(such as climate warming, N fertilization) in peatlands without considering interactions between these disturbances that may alter peatlands’ C function. We set up a mesocosm experiment to investigate how Greenhouse Gas(CO2, CH4, N2O) fluxes, and dissolved organic carbon(DOC)and total dissolved N(TN) contents are affected by a shift from Sphagnum mosses to Molinia caerulea dominated peatlands combined with N fertilization. Increasing N deposition did not alter the C fluxes(CO2 exchanges, CH4 emissions) or DOC content. The lack of N effect on the C cycle seems due to the capacity of Sphagnum to efficiently immobilize N. Nevertheless, N supply increased the N2O emissions, which were also controlled by the plant communities with the presence of Molinia caerulea reducing N2O emissions in the Sphagnum mesocosms. Our study highlights the role of the vegetation composition on the C and N fluxes in peatlands and their responses to the N deposition. Future research should now consider the climate change in interaction to plants community modifications due to their controls of peatland sensitivity to environmental conditions. 展开更多
关键词 CO2 and CH4 N2O PEATLAND Plant COMMUNITY composition SPHAGNUM MOSS Graminoid
用范氏法测定多类植物中酸性洗涤木质素的影响因素研究 预览
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作者 李朝英 郑路 +1 位作者 杨文娟 莫世宇 《江西农业学报》 CAS 2019年第3期61-64,共4页
探讨了用范氏法测定植物中酸性洗涤木质素(ADL)的影响因素,对不同消煮时间、不同硫酸浓度、不同浸泡时间条件下的测定结果进行了比较分析。结果表明:样品消煮的适宜时间为30 min,硫酸适宜浓度为72%~75%,浸泡适宜时间为3~4 h;人工检测结... 探讨了用范氏法测定植物中酸性洗涤木质素(ADL)的影响因素,对不同消煮时间、不同硫酸浓度、不同浸泡时间条件下的测定结果进行了比较分析。结果表明:样品消煮的适宜时间为30 min,硫酸适宜浓度为72%~75%,浸泡适宜时间为3~4 h;人工检测结果的变异系数(CV)在2.23%~6.66%之间,仪器法的CV在0.15%~1.10%之间;人工检测与仪器法所测结果无显著性差异;范氏法与王玉万法所测结果无显著性差异,这两种方法适用于植物ADL的测定。 展开更多
关键词 范氏法 植物 酸性洗涤木质素 测定 影响因素
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Compatibility Screening of Plant Extracts Synergistic with Osthole 预览
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作者 Zhao Qian Xu Li-zhen +1 位作者 Zhang Li-yan Wu Jian-zhong 《东北农业大学学报:英文版》 CAS 2019年第1期19-27,共9页
Plant pests have been a major problem in agricultural production. To establish sustainable methods for plant pest control, 20 of plant material extracts were selected which were synergistic with Osthole to improve the... Plant pests have been a major problem in agricultural production. To establish sustainable methods for plant pest control, 20 of plant material extracts were selected which were synergistic with Osthole to improve the performance of the osthole existing in products. The preliminary screening results indicated that Zanthoxylum bungeanum Maxim.(Z. bungeanum Maxim) compounds exerted the highest synergism. A single dose(2 000 mg · L-1) of Z. bungeanum Maxim. crude extracts was used against Plutella xyllostella(P. xyllostella), Lipaphis erysimi(L. erysimi), and Sitophilus zeamais(S. zeamais). For a further examination form Z. bungeanum Maxim., in which crude extracts were mixed with osthole at different ratios. The volume ratio of 7 : 3(Z. bungeanum Maxim. extract: osthole) exhibited a more pronounced synergistic effect, and all the values of the co-toxicity coefficients were above 120. Eight distinct compounds were derived from the ethanol crude extract from Z. bungeanum Maxim.Then, the toxicity of these components to pests, such as P. xyllostella, L. erysimi, S. zeamais, Rhizopertha dominica(R. dominica),and Tribolium castaneum Herbst(T. castaneum Herbst), was determined. The results indicated that Compound 4 and Compound 7 exerted lethal effects on pest investigation. Compound 4 had the most substantial insecticidal action, at a concentration of64 ug · mL-1, and a death ratio of 78.3% was achieved for P. xyllostella. 展开更多
关键词 plant PESTICIDE OSTHOLE INSECTICIDE MIXTURE
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Optimization Potentials for the Waste Heat Recovery of a Gas-Steam Combined Cycle Power Plant Based on Absorption Heat Pump
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作者 ZHANG Hongsheng ZHAO Hongbin +1 位作者 LI Zhenlin HU Eric 《热科学学报:英文版》 SCIE EI CAS CSCD 2019年第2期283-293,共11页
A new waste heat recovery system is presented to recover exhausted steam waste heat from the steam turbine by absorption heat pump(AHP) in a gas-steam combined cycle(GSCC) power plant. The system can decrease energy c... A new waste heat recovery system is presented to recover exhausted steam waste heat from the steam turbine by absorption heat pump(AHP) in a gas-steam combined cycle(GSCC) power plant. The system can decrease energy consumption and further improve the energy utilization. The performance evaluation criteria are calculated, and exergy analysis for key components are implemented in terms of the energy and exergy analysis theory. Besides, the change of these criteria is also revealed before and after modification. The net power output approximately increases by 21738 kW, and equivalent coal consumption decreases by 5.58 g/kWh. A 1.81% and 1.92% increase in the thermal and exergy efficiency is respectively obtained in the new integrated system as the heating load is 401095 kJ at 100% condition. Meanwhile, the appropriate extraction parameters for heating have been also analyzed in the two systems. The proposed scheme can not only save energy consumption but also reduce emission and gain great economic benefit, which is proven to be a huge potential for practical application. 展开更多
关键词 combined CYCLE power plant absorption HEAT PUMP waste HEAT recovery evaluation CRITERIA EXERGY analysis
Effect of plant extracts on activity of some defense enzymes of apple fruit in interaction with Botrytis cinerea 预览
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作者 Jalal Gholamnezhad 《农业科学学报:英文版》 SCIE CAS CSCD 2019年第1期115-123,共9页
The efficacy of seven plant extracts (neem, fennel, lavender, thyme, pennyroyal, salvia and asafetida) in controlling postharvest of apple (caused by Botrytis cinerea) was evaluated in vitro and in vivo. In vitro, all... The efficacy of seven plant extracts (neem, fennel, lavender, thyme, pennyroyal, salvia and asafetida) in controlling postharvest of apple (caused by Botrytis cinerea) was evaluated in vitro and in vivo. In vitro, all plant extracts treatments inhibited spore germination. Inhibitory rates of pore germination was 17.41 and 20.83% for neem extract treatment (methanolic and aqueous extracts, respectively) with significant difference compared to control (73.6 and 85.33%) for aqueous and methanol extracts. In the storage conditions, the application of aqueous extract of neem (at concentration of 25%) resulted in 89.11% reduction of disease severity compared with the untreated control. Results of enzymes activity showed the plant extracts can increase the activity of peroxidase, phenylalanine ammonia-lyase, β-1,3-glucanase and polyphenol oxidase in the presence of pathogens, in apple fruits. However, the results of this research revealed that application of neem extracts was more effective than the application of other plant extracts. According to this study, it could be concluded that plant extracts may be useful to control postharvest disease as a safe alternative option to chemical fungicides. 展开更多
关键词 BOTRYTIS CINEREA defense ENZYMES plant extracts SPORE GERMINATION
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A patatin-like protein synergistically regulated by jasmonate and ethylene signaling pathways plays a negative role in Nicotiana attenuata resistance to Alternaria alternata
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作者 Junbin Cheng Na Song Jinsong Wu 《植物多样性:英文版》 CAS CSCD 2019年第1期7-12,共6页
Although patatin was initially identified as a major storage protein in potato tubers, patatin-like proteins(PLPs) have been recently reported to be widely present in many plant species and shown to be involved in pla... Although patatin was initially identified as a major storage protein in potato tubers, patatin-like proteins(PLPs) have been recently reported to be widely present in many plant species and shown to be involved in plant-pathogen interactions. However, it is not clear whether PLPs are involved in Nicotiana attenuata resistance against the necrotrophic fungal pathogen, Alternaria alternata. In this study we identified a NaPLP gene, whose expression was highly elicited by A. alternata inoculation. Silencing NaPLP enhanced N. attenuata resistance to A. alternata, which was associated with higher induction levels of JA and ethylene biosynthetic genes, NaACS1, NaACO1 and NaLOX3. The induction of NaPLP expression by the fungus was abolished in JA-deficient plants and significantly reduced in ethylene-insensitive plants. In addition, NaPLP transcripts were highly induced by exogenous treatment with either methyl jasmonate(MeJA) or ethephon. Co-treatment with MeJA and ethephon led to a much higher induction level of NaPLP transcripts, and this synergistic induction was largely dependent on endogenous JA and ethylene signaling pathways. Thus, we conclude that the NaPLP gene is elicited by A. alternata via JA and ethylene signaling pathways in a synergistic way;however, unlike other JA-and ethylene-induced defense genes,NaPLP negatively affects plant resistance to the fungus likely by suppressing JA and ethylene biosynthetic gene expression. 展开更多
关键词 ALTERNARIA ETHYLENE JASMONATE Necrotrophic fungal pathogen NICOTIANA Plant RESISTANCE
尾矿区砷污染土壤的植物、微生物协同修复 预览
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作者 李秀玲 韦岩松 +3 位作者 辛磊 高宇星 韦诗琪 覃拥灵 《湿法冶金》 CAS 北大核心 2019年第1期64-68,74共6页
研究了植物、微生物对砷污染土壤的协同修复效果。选取广西河池某尾矿区长势良好的13种植物及其根际土壤作为试验样品,尾矿区土壤中砷质量分数高达5.708g/kg。富集植物为风车草和蜈蚣草,其中,风车草对砷的富集和迁移效果最佳。利用从砷... 研究了植物、微生物对砷污染土壤的协同修复效果。选取广西河池某尾矿区长势良好的13种植物及其根际土壤作为试验样品,尾矿区土壤中砷质量分数高达5.708g/kg。富集植物为风车草和蜈蚣草,其中,风车草对砷的富集和迁移效果最佳。利用从砷质量分数最高的土壤样品中筛选得到的砷耐受性较强的菌株CP3和CP7对风车草进行盆栽试验。结果表明,CP3和CP7复合菌组的植物株高和质量(鲜)较对照组分别高57.80%和46.51%,对砷的富集率和迁移率分别高64.87%和21.08%,表明复合菌有助于风车草对砷的富集,可用于砷污染土壤的植物、微生物协同修复。 展开更多
关键词 尾矿区 土壤 植物 细菌 修复
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Role of flavonoids in plant interactions with the environment and against human pathogens - A review 预览
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作者 Muhammad Khalid Saeed-ur-Rahman +1 位作者 Muhammad Bilal HUANG Dan-feng 《农业科学学报:英文版》 SCIE CAS CSCD 2019年第1期211-230,共20页
Flavonoids are widely-distributed polyphenolic secondary metabolites with diverse biological activities in plants and benefit human health as protective dietary agents. They participate in plants’responses to harsh e... Flavonoids are widely-distributed polyphenolic secondary metabolites with diverse biological activities in plants and benefit human health as protective dietary agents. They participate in plants’responses to harsh environmental conditions and effectively regulate the cell differentiation and growth. In plants, the majority of their functions are attributed to their strong antioxidative properties. Similarly, dietary flavonoids protect the human body against free radicals which are associated with the development of cancer and atherosclerosis. Plants rich in polyphenols have been used to cure various diseases because of their antibacterial, antiviral, antifungal and anticancer properties. This review summarizes the up-to-date research trends and development on flavonoids and its derivatives, working mechanisms and potential functions and applications particularly in relation to plant protection and human health. Towards the end, notable concluding remarks with a close-up look at the future research directions have also been presented briefly. 展开更多
关键词 FLAVONOIDS structure and composition BIOLOGICAL activity PLANT protection human HEALTH ANTIMICROBIAL
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Molecular mechanism underlying Piriformospora indica-mediated plant improvement/protection for sustainable agriculture
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作者 Muhammad Khalid Saeed-ur-Rahman Danfeng Huang 《生物化学与生物物理学报:英文版》 SCIE CAS CSCD 2019年第3期229-242,共14页
The beneficial endophytic microorganisms have received significant attention in agriculture because of their exceptional capabilities to facilitate functions like nutrient enrichment,water status,and stress tolerance(... The beneficial endophytic microorganisms have received significant attention in agriculture because of their exceptional capabilities to facilitate functions like nutrient enrichment,water status,and stress tolerance(biotic and abiotic).This review signifies the molecular mechanisms to better understand the Piriformospora indica-mediated plants improvement or protection for sustainable agriculture.P.indica,an endophytic fungus,belonging to the order Sebacinales(Basidiomycota),is versatile in building mutualistic associations with a variety of plants including pteridophytes,bryophytes,gymnosperms,and angiosperms.P.indica has enormous potential to manipulate the hormonal pathway such as the production of indole-3-acetic acid which in turn increases root proliferation and subsequently improves plant nutrient acquisition.P.indica also enhances components of the antioxidant system and expression of stress-related genes which induce plant stress tolerance under adverse environmental conditions.P.indica has tremendous potential for crop improvement because of its multi-dimensional functions such as plant growth promotion,immunomodulatory effect,biofertilizer,obviates biotic(pathogens)and abiotic(metal toxicity,water stress,soil structure,salt,and pH)stresses,phytoremediator,and bio-herbicide.Considering the above points,herein,we reviewed the physiological and molecular mechanisms underlying P.indica-mediated plants improvement or protection under diverse agricultural environment.The first part of the review focuses on the symbiotic association of P.indica with special reference to biotic and abiotic stress tolerance and host plant root colonization mechanisms,respectively.Emphasis is given to the expression level of essential genes involved in the processes that induce changes at the cellular level.The last half emphasizes critical aspects related to the seed germination,plant yield,and nutrients acquisition. 展开更多
关键词 ENDOPHYTIC Piriformospora INDICA mutualistic association PLANT stress tolerance SUSTAINABLE agriculture
石油化工过程与装置的操作优化 预览
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作者 梁庆辉 黄福仪 《化工设计通讯》 CAS 2019年第3期89-89,119共2页
石油行业是我国能源产业发展的基础。随着近几年经济全球化发展,各国之间的资源经济交流越来越密切,石油价格和供求受到经济变化等的影响,越来越不稳定。然而这些不稳定因素对石油行业乃至对国家化工具有十分重要的影响,石油化工过程与... 石油行业是我国能源产业发展的基础。随着近几年经济全球化发展,各国之间的资源经济交流越来越密切,石油价格和供求受到经济变化等的影响,越来越不稳定。然而这些不稳定因素对石油行业乃至对国家化工具有十分重要的影响,石油化工过程与装置在线操作优化项目作为一项稳定石油产业的项目,在石油产业发展过程中显得越来越重要。通过论述石油化工过程与装置操作优化的多样性和必要性,分别提出不同的石油化工过程和装置方法,并通过实例进行讨论,希望能给我国石油企业或者同行一些建议,为我国石油行业做出一些贡献。 展开更多
关键词 在线优化 先进控制 石油化工过程 装置
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Catalytic Cracking Characteristics of Plant Oil for Producing Light Olefins and Light Aromatics 预览
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作者 Cheng Xiaojie 《中国炼油与石油化工:英文版》 SCIE CAS 2019年第1期55-61,共7页
Catalyst containing shape selective zeolite is used to investigate the catalytic cracking characteristics of palm oil and three types of hydrocarbon VGOs on a fixed fluidized bed(FFB) unit. The advantage of producing ... Catalyst containing shape selective zeolite is used to investigate the catalytic cracking characteristics of palm oil and three types of hydrocarbon VGOs on a fixed fluidized bed(FFB) unit. The advantage of producing light olefins and light aromatics by catalytic cracking of plant oil is discussed. Results indicate that the hydrocarbyl group of the plant oil molecule is quite readily crackable;the C6-C8 aromatics yield is well above and the light olefins yield is about the same with the hydrocarbon feeds, while the yields of low value products are lower;the hydrocarbyl group of the plant oil molecule has strong tendency of aromatization, and can enter the zeolite pores to selectively form C6-C8 aromatics;during catalytic cracking of plant oil and fatty acids, a portion of the oxygen is removed in the form of water through hydrogen transfer reaction, while olefins are prevented from being saturated, which can ensure proper yields of both low-carbon olefins and light aromatics. 展开更多
关键词 plant oil catalytic CRACKING HYDROGEN-TRANSFER LIGHT OLEFINS LIGHT AROMATICS
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