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Research Hotspots and Trends of Cyperus esculentus Based on Bibliometric Analysis
QIAN Hailin, WANG Shiyan, REN Peng, YANG Fang, CHANG Jiaqi, CHANG Yangyang, WANG Dongyin
Chin Agric Sci Bull ›› 2025, Vol. 41 ›› Issue (32) : 145-157.
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Abbreviation (ISO4): Chin Agric Sci Bull
Editor in chief: Yulong YIN
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Research Hotspots and Trends of Cyperus esculentus Based on Bibliometric Analysis
This study conducts a comprehensive analysis of the research context of Cyperus esculentus (tigernut) in China to identify current research hotspots and future development trends. Based on literature retrieved from the CNKI and Web of Science core databases, 1223 relevant publications from 2005 to March 2025 were collected and analyzed using bibliometric and visualization methods. The results demonstrate that: (1) both Chinese and English publications showed fluctuating growth patterns, with academic articles being the predominant form; Chinese publications surpassed English ones in 2022, exceeding 70 articles. (2) Domestic research primarily focuses on industrial upgrading, emphasizing characteristic analysis and processing technology innovation, while international research centers on health demands and ecological agriculture, particularly developing tuber-based functional foods (e.g., meal replacements), cultivating stress-resistant varieties, and investigating metabolic disease interventions. (3) While both the United States and China show high research output, China's academic influence lags behind that of the U.S. and Spain. China's National Key R&D Program and National Natural Science Foundation are among the top funding sources globally, and Henan University of Technology has established notable influence in this field. (4) Institutional collaboration network analysis reveals that domestic research forms isolated region-centric clusters, whereas international research exhibits extensively connected global networks, and only a few Chinese institutions successfully integrated. Comparative analysis of authorship networks shows that English publications feature multi-centric, international collaboration patterns, while Chinese publications demonstrate mono-centric, localized core-periphery structures. (5) Chinese research is transitioning from quantitative expansion to quality improvement, requiring strengthened basic theoretical research, enhanced technological innovation efficiency, and breakthroughs in core areas such as functional component mechanisms and intelligent processing technologies. With China's economic development driving increased demand for oil crops and growing health consciousness, Cyperus esculentus is expected to become an important research focus and emerging trend in energy and food sectors.
Cyperus esculentus / bibliometric analysis / research hotspots / future prospects / CiteSpace / VOSviewer / knowledge mapping
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Weed-suppressive crop cultivars are a potentially attractive option in weed management strategies (IWM). A greenhouse study was conducted at the R. R. Foil Plant Science Research Center, Starkville, MS, to assess the potential weed-suppressive ability of 17 tomato cultivars against Palmer amaranth (Amaranthus palmeri S. Wats), yellow nutsedge (Cyperus esculentus L.), and large crabgrass (Digitaria sanguinalis L.). The experiment was a completely randomized design, with four replications, and was repeated twice. The height, chlorophyll, and dry weight biomass of the weeds were measured 28 days after sowing. Weed suppression varied greatly among tomato cultivars. The most significant effect of tomato interference was recorded on Palmer amaranth, and the least reduction was observed with yellow nutsedge plants. Cultivars 15 and 41 reduced Palmer amaranth height and biomass by about 45 and 80%, respectively, while cultivar 38 reduced 60% of the chlorophyll percentage. Large crabgrass plants were 35% shorter in the presence of cultivar 38 and had a biomass reduction of 35% in the presence of cultivar 38. Under tomato interference, a minimal effect was observed in chlorophyll, height, and biomass of yellow nutsedge seedlings. Factoring all parameters evaluated, cultivars 38 and 33 were most suppressive against Palmer amaranth and large crabgrass.
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Weed and disease management in organic watermelon [Citrullus lanatus (Thunb.) Matsum. & Nakai] production is challenging. Yellow nutsedge (Cyperus esculentus L.) and Palmer amaranth (Amaranthus palmeri S. Wats.) are two competitor weeds in watermelon plasticulture production systems. Anaerobic soil disinfestation (ASD) is an emerging non-chemical approach to control weeds and soilborne plant pathogens, especially in organic farming. The effect of ASD treatments on weeds and soilborne diseases is being documented on different specialty crops. However, the impact of ASD treatments on the crop and crop genotypes; specifically watermelon has not been elucidated. Therefore, the impact of chicken manure and molasses (CMM)-induced ASD on twenty commercially available watermelon genotypes/rootstocks and major weed species was evaluated in a high tunnel experiment. The experiment was constructed as a randomized complete block design with three replications. The treatments consisted of a factorial of carbon source (1) non-treated check (CK), (2) CMM by twenty watermelon genotypes and rootstock. Soil treated with carbon CMM demonstrated significantly greater cumulative anaerobicity (246,963) activity relative to CK (575,372). Under anaerobic conditions, CMM achieved 91% weed control compared to CK. A lower number of yellow nutsedge (2) and Palmer amaranth (1) counts were recorded in CMM compared to CK (8) and (28), respectively. Among watermelon genotypes, ‘Extazy’, ‘Powerhouse’, ‘Sangria’, and ‘Exclamation’ had greater vigor 8.5, 8.4, 8.4, and 8.3, respectively, at 28 days after transplanting in CMM-treated soil. Greater watermelon plant fresh biomass was recorded in CMM-treated soil for ‘Extazy’ (434 g), ‘Powerhouse’ (409 g), ‘Exclamation’ (364 g), and ‘Sangria’ (360 g). This study demonstrated the variable response of watermelon genotypes to CMM-induced ASD and provides a guide for germplasm selection in organic watermelon production under field conditions.
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由双生病毒引起的作物病害对农业生产造成了严重的危害,为分析双生病毒的研究现状、热点和前沿,以1978—2022年Web of Science数据库核心合集中3 235篇相关文献为研究对象,利用软件CiteSpace对这些文献进行计量分析,解析其研究热点、合作网络和共被引网络。结果表明:双生病毒研究在21世纪进入兴盛阶段,越来越多的研究者投身于该领域。关键词突现性分析表明,“Begomovirus(菜豆金色花叶病毒属)”、“transmission(传播)”和“resistance(抗性)”是近几年的研究热点,我国学者的3篇文章具有较高的Sigma值,其研究一直处于双生病毒研究领域的前沿位置。合作网络分析显示美国在双生病毒研究领域起步较早,发文数量和中介中心性都处于领先地位,我国发文量位居全球第三,但中介中心性高于发文量位居全球第一的美国和第二的印度,表明我国双生病毒研究呈现出积极向上的发展态势。我国在双生病毒领域发文数量最多的学者是周雪平,其发文数量位居全球第二,是我国双生病毒领域探索阶段的代表性人物。文献共被引图谱分析表明“geminivirus-BR1 gene expression(双生病毒BR1基因表达)”、“mosaic virus movement protein(花叶病毒运动蛋白)”、“retinoblastoma protein(植物视网膜母细胞瘤蛋白)”、“whitefly-transmitted geminiviruses(烟粉虱传双生病毒)”、“red blotch virus(红斑病毒)”等为不同时期双生病毒领域的研究前沿。随着双生病毒研究层次的不断深入,未来研究将会集中在病毒传播、抗病育种、植物-病毒-媒介昆虫互作机制等方向。
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Cover crop–based organic rotational no-till soybean production has attracted attention from farmers, researchers, and other agricultural professionals because of the ability of this new system to enhance soil conservation, reduce labor requirements, and decrease diesel fuel use compared to traditional organic production. This system is based on the use of cereal rye cover crops that are mechanically terminated with a roller-crimper to create in situ mulch that suppresses weeds and promotes soybean growth. In this paper, we report experiments that were conducted over the past decade in the eastern region of the United States on cover crop–based organic rotational no-till soybean production, and we outline current management strategies and future research needs. Our research has focused on maximizing cereal rye spring ground cover and biomass because of the crucial role this cover crop plays in weed suppression. Soil fertility and cereal rye sowing and termination timing affect biomass production, and these factors can be manipulated to achieve levels greater than 8,000 kg ha−1, a threshold identified for consistent suppression of annual weeds. Manipulating cereal rye seeding rate and seeding method also influences ground cover and weed suppression. In general, weed suppression is species-specific, with early emerging summer annual weeds (e.g., common ragweed), high weed seed bank densities (e.g. > 10,000 seeds m−2), and perennial weeds (e.g., yellow nutsedge) posing the greatest challenges. Due to the challenges with maximizing cereal rye weed suppression potential, we have also found high-residue cultivation to significantly improve weed control. In addition to cover crop and weed management, we have made progress with planting equipment and planting density for establishing soybean into a thick cover crop residue. Our current and future research will focus on integrated multitactic weed management, cultivar selection, insect pest suppression, and nitrogen management as part of a systems approach to advancing this new production system.
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Integrated weed management tactics are necessary to develop cropping systems that enhance soil quality using conservation tillage and reduced herbicide or organic weed management. In this study, we varied planting and termination date of two cereal rye cultivars (‘Aroostook’ and ‘Wheeler’) and a rye/hairy vetch mixture to evaluate cover-crop biomass production and subsequent weed suppression in no-till planted soybean. Cover crops were killed with a burn-down herbicide and roller-crimper and the weed-suppressive effects of the remaining mulch were studied. Cover-crop biomass increased approximately 2,000 kg ha−1from latest to earliest fall planting dates (August 25–October 15) and for each 10-d incremental delay in spring termination date (May 1–June 1). Biomass accumulation for cereal rye was best estimated using a thermal-based model that separated the effects of fall and spring heat units. Cultivars differed in their total biomass accumulation; however, once established, their growth rates were similar, suggesting the difference was mainly due to the earlier emergence of Aroostook rye. The earlier emergence of Aroostook rye may have explained its greater weed suppression than Wheeler, whereas the rye/hairy vetch mixture was intermediate between the two rye cultivars. Delaying cover-crop termination reduced weed density, especially for early- and late-emerging summer annual weeds in 2006. Yellow nutsedge was not influenced by cover-crop type or the timing of cover-crop management. We found that the degree of synchrony between weed species emergence and accumulated cover-crop biomass played an important role in defining the extent of weed suppression.
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赵雪玲, 闫春梅, 王玲玉, 等. 不同乳酸菌发酵油莎草品质和风味影响的研究[J]. 中国饲料, 2025(11):155-165.
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李粘前, 李琛, 李淑婷, 等. 油莎豆苹果酸酶(ME)全基因组鉴定及CeNAD-ME2功能分析[J]. 生物技术通报, 2025, 41(10):210-221.
目的 系统分析油莎豆苹果酸酶（malic enzyme, ME）基因家族成员、挖掘参与油莎豆块茎油脂合成的ME，为全面解析油莎豆块茎富油机制和培育营养器官富油的作物新种质提供科学参考。 方法 应用组学工具全基因组鉴定油莎豆CeME基因家族成员、分析CeME蛋白理化特性；运用实时荧光定量PCR（RT-qPCR）检测CeME基因在块茎不同发育时期的表达谱；构建靶标CeME表达载体，对酵母（Saccharomyces cerevisiae）和烟草（Nicotiana tabacum）进行遗传转化；检测转化体的ME酶活性和油脂代谢。 结果 从油莎豆基因组中共鉴定到6个CeMEs基因家族成员，分布于6条染色体，其中4个NADP类型（CeNADP-ME1-CeNADP-ME4）和2个NAD类型（CeNAD-ME1-CeNAD-ME2）。CeNADP-ME1具有19个内含子，其余5个CeME基因均含有18个内含子。CeME基因启动子含有生长发育、激素和逆境响应等多种顺式作用元件。6个CeME蛋白均具有典型的ME酶蛋白结构域和12个保守基序。RT-qPCR分析显示，CeME基因在油莎豆块茎油脂积累关键时期（播种后80‒120 d）表达上调，其中，NAD-ME类型的CeNAD-ME2表达量最高。CeNAD-ME2编码的酶蛋白定位于线粒体。过表达CeNAD-ME2酵母细胞总脂和棕榈油酸（C16：1）分别比野生型酵母提高5.6%和5%。与野生型烟草相比，转CeNAD-ME2株系ME活性增加1.5‒4倍，烟叶总脂和油酸（C18：1）含量分别提高5.2%和5.6%，而可溶性糖和淀粉含量分别下降2%和5%。 结论 从油莎豆基因组鉴定到6个CeME成员，CeNAD-ME2参与块茎油脂合成。异源表达CeNAD-ME2可驱动碳源更多地流向油脂合成途径，显著提高宿主总脂和单不饱和脂肪酸含量。
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为深入了解根系分泌物研究进展及发展趋势，以Web of Science核心合集数据库2002—2022年根系分泌物的相关文献为数据源，采用文献计量学方法，借助软件VOSviewer和CiteSpace对年发文量、高产发文国家间合作关系、发文机构、期刊分布、文献共被引和高频关键词等进行可视化处理，并对不同研究阶段主要研究内容进行分析。结果表明，近20年根系分泌物研究领域年发文量总体呈上升趋势，在国际范围内受重视程度越来越高。中国、美国合作关系密切且合作发文最多，中国科学院与美国科罗拉州立大学致力于该领域研究并做出突出贡献，《Plant and Soil》和《Soil Biology & Biochemistry》为主要载体。生态系统、根际微生物、有机酸、基因、胁迫和植物适应性为根系分泌物研究的核心主题；不同研究阶段主要研究内容由早及近表现为信号传导—养分获取—化感作用—植物修复—植物与微生物互作。在分子水平上揭示植物与根际微生物的互作机理、根系分泌物与根际微生物在植物生长过程中的调控功能及分子机制等更为细化的研究将会成为未来一段时间的新兴研究热点。
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