Anti-tumor effect of coix seed based on the theory of medicinal and food homology

Coix seed is a dry and mature seed of Coix lacryma-jobi L.var.ma-yuen(Roman.)Stapf in the Gramineae family.Coix seed has a sweet,light taste,and a cool nature.Coix seed enters the spleen,stomach,and lung meridians.It has the effects of promoting diuresis and dampness,strengthening the spleen to prevent diarrhea,removing arthralgia,expelling pus,and detoxifying and dispersing nodules.It is used for the treatment of edema,athlete's foot,poor urination,spleen deficiency and diarrhea,dampness and obstruction,lung carbuncle,intestinal carbuncle,verruca,and cancer.The medicinal and health value is high,and it has been included in the list of medicinal and food sources in China,which has a large development and application space.This article reviews the current research achievements in the processing methods and anti-tumor activities of Coix seed and provides examples of its clinical application in ancient and modern times,aiming to provide reference for further research on Coix seed and contribute to its clinical application and development.Through the analysis of the traditional Chinese patent medicines,and simple preparations and related health food of Coix seed queried by Yaozhi.com,the source,function,and dosage form of Coix seed were comprehensively analyzed,with a view of providing a reference for the development of Coix seed medicine and food.

Screening and Analysis of Germplasm Resources of Wild Coix lacryma-jobi L. with High Content of Coixin

[Objectives] To screen and analyze germplasm resources of wild Coix lacryma-jobi L. with high content of coixin. [Methods] From the 150 kinds of collected wild C. lacryma-jobi L. germplasm resources, 24 kinds of excellent resources were screened and detected. Morphological statistics were carried out, and the content of coixin in the four organ of roots, stems, leaves and seeds were measured, and the approved cultivar white husk Liugu of C. lacryma-jobi L. was taking as the control. [Results] Among the organs of the plant of C. lacryma-jobi L., the roots had the highest content of coixin, so the roots of C. lacryma-jobi L. can be used as the medicinal parts of C. lacryma-jobi L. [Conclusions] The wild C. lacryma-jobi L.Y229, Y164, Y166, Y83, and Y84 stains had excellent yield, and their root coixin content was significantly higher than that of the control variety, so they can be used for cultivation as excellent germplasm, so as to obtain new variety(line) of C. lacryma-jobi L.with higher content of coixin.

Extraction of Flavonoids from Leaves of Coix lacryma-jobi L.

[Objectives] To extract the flavonoids from leaves of Coix lacryma-jobi L. [Methods] Ethanol extraction method was adopted,spectrophotometry was used,and single factor experiment and orthogonal experiment were carried out to study the effects of ethanol percentage,extraction temperature,solid-to-liquid ratio and extraction time on the extraction of total flavonoids from leaves of C. lacryma-jobi L.[Results] The order of 4 factors influencing the extraction of flavonoids from leaves of C. lacryma-jobi L. was: solid-to-liquid ratio > extraction time > ethanol percentage > extraction temperature. When the extraction temperature was 70℃,the extraction time was 1. 5 h and the solid-liquid ratio was 1: 10,the ethanol percentage was 60%,the extraction effect was the best,extraction of flavonoids was 0. 107 5 mg/m L.[Conclusions] This study is expected to provide a theoretical basis for further development and utilization of C. lacryma-jobi L.

Effects of Different Herbicides on Weed Control,Agronomic Characters and Grain Quality of Coix lacryma-jobi L.

[Objectives]The paper was to study the effects of different herbicides on weed control,agronomic characters and grain quality of Coix lacryma-jobi L.[Methods]Six commonly used herbicides were selected for the trial,including atrazine SC,butachlor SC,monosulfuron WP,MCPA-starane EC,clopyralid AS and tribenuron-methyl WP.[Results](i)Atrazine,butachlor and monosulfuron had no chemical injury to C.lacryma-jobi L.,while clopyralid caused slight chemical injury.(ii)The fresh weight control effects of atrazine,butachlor and monosulfuron on weeds increased first and then decreased.The initial control effect of MCPA-starane and clopyralid reached more than 90%;the control effect of monosulfuron increased gradually in the late stage,reaching 97%at 60 d post spraying,and the overall control effect was optimal.(iii)Compared with manual weeding,herbicides had no significant effect on plant height of C.lacryma-jobi L.However,compared with no weeding,other herbicides except tribenuron-methyl inhibited plant growth to a certain extent.Herbicides had different effects on main stem diameter,tiller number per plant and grain number per plant of C.lacryma-jobi L.(iv)Different herbicides had no significant effect on 100-grain weight,but had significant effect on yield.(v)Compared with manual weeding,atrazine,butachlor and clopyralid decreased the protein content of C.lacryma-jobi L.,and the use of atrazine,butachlor,monosulfuron,MCPA-starane and tribenuron-methyl decreased the fat content of C.lacryma-jobi L.;butachlor and MCPA-starane decreased the glycerol trioleate content of C.lacryma-jobi L.Compared with no weeding,chemical herbicides had no significant effect on the protein content,while atrazine decreased the fat content,and butachlor and MCPA-starane decreased the glycerol trioleate content of C.lacryma-jobi L.[Conclusions]The use of herbicides significantly increases crop yield compared with no weeding,but has an impact on agronomic characters and grain quality.

Effects of Thallium Stress on Photosynthesis, Chlorophyll Fluorescence Parameters and Antioxidant Enzymes Activities of Coix Lacryma-jobi

Levels of T1 （Thallium） in soil from 0 （control） to 50 μg/L through 0.2, 0.5, 1 and 2.5μg/L were directly and positively correlated to levels of T1 in plant tissue, the accumulation being maximum in roots, intermediate in leaves and minimum in stems. Thallium, especially at higher concentrations, adversely affected photosynthesis （as judged based on chlorophyll fluorescence parameters）, suggesting inhibition of photo-activation of PSII （Photosystems II）, and also decreased the rate of photosynthesis, the rate of transpiration and stomatal conductivity drastically. Exposure to TI also increased the activity of CAT （Catalase） （except at 1 μg/L） and POD （Peroxidase） （except at 0.2 μg/L）, suggesting that the antioxidant systems in Coix lacryma-jobi were the main contributors of CAT and SOD （Superoxide Dismutase） and that the tolerance of C. lacryma-jobi to T1 is mainly due to this induced antioxidant machinery.

HPLC法测定薏苡非种仁部位薏苡素的含量

[目的]建立薏苡非种仁部位中薏苡素的HPLC测定方法。[方法]采用高效液相色谱法。色谱柱为AgilentHC-C18色谱柱(4.6mm×250mm,5μm);流动相为乙腈-0.1%磷酸水(V∶V=25∶75);流速为1.0ml/min;柱温为25℃;检测波长为232nm。[结果]薏苡非种仁部位中薏苡素的含量:根>皮>茎。[结论]该方法准确、专属性强,可为薏苡非种仁部位的综合开发利用提供参考。

Phytochemical screening, antibacterial and anthelmintic activities of leaf and seed extracts of Coix lacryma-jobi L.

Objective: To evaluate the possible phytochemical constituents, antibacterial and anthelmintic activity of Coix lacryma-jobi L. (Job's tears) using the chloroform leaves and seed extracts. Methods: The test for antibacterial activity and minimum inhibitory concentration was conducted by the disc diffusion and two-fold dilution method, respectively. In anthelmintic activity test, using Pheretima posthuma model, vermifuge and vermicidal activity were determined by using the chloroform extract at various concentrations. Results: The preliminary phytochemical screening of chloroform extracts of Job's tears leaves indicated the presence of alkaloid, carbohydrate, saponin, glycosides, flavonoids, phenols, tannins and steroids whereas the seeds extract contained glycosides, flavonoids, phenols and steroids, which revealed highest antimicrobial activity against Bacillus cereus and Klebsiella pneumoniae. The lowest minimum inhibitory concentration (12.5–50 mg/mL) was observed against all selected bacteria. On the other hand, it has been observed that chloroform leaves extracts showed shortest time of paralysis (P = 8.17 min) and death (D = 18.23 min) at 100 mg/mL concentration, in comparison with seed extracts (P = 36.83 min and D = 62.33 min) at 100 mg/mL concentration and albendazole (10 mg/mL) used as reference drug (P = 20.17 min and D = 43.67 min), which indicated the plant possessed mild anthelmintic activity. Conclusions: The chloroform extracts (leaves and seeds) showed efficacy for both bacterial infections and parasitic diseases, which ensure the traditional uses of Coix lacryma-jobi L.

西洋参、紫苏籽和薏苡根水提物的化感作用

目的 研究西洋参、紫苏籽和薏苡根水提物的化感作用。方法 以白菜和西洋参为测试植物 ,观察西洋参、紫苏籽和薏苡根水提物对其种子萌发和活力、存苗率、幼苗初期生长的影响。结果 西洋参茎叶水提物与高于 1%浓度的须根水提物严重抑制白菜和西洋参的种子萌发及活力、存苗率、幼苗初期生长 ,而紫苏籽和薏苡根的水提物则促进实验植物幼苗根和芽的生长。高浓度的薏苡根水提物可使西洋参的存苗率显著降低。结论 3种药用植物中存在活性较强的化感物质 ,其化感作用的正负效应和强度与它们的水提物浓度及植物受体种类有关。

微波法提取薏苡仁油的研究

以薏苡仁油的提取率为指标,考察了微波法提取薏苡仁油的主要影响因素微波辐射功率、微波辐射时间、料液比和药材粒度;采用气相色谱法考察微波对薏苡仁油成分的影响,并与加热回流法进行了比较。结果表明,微波法提取薏苡仁油的优化工艺条件为:采用无水乙醇作溶剂、药材粒度60目、微波辐射功率300 W、微波辐射时间7 min、料液比1∶5,在此条件下薏苡仁油的提取率为6.87%;气相色谱分析表明,微波法与加热回流法提取的薏苡仁油的主要化学成分基本相同,微波辐射对薏苡仁油成分无影响。

薏苡仁水溶性蛋白提取工艺的优化

目的:优化薏苡仁水溶性蛋白提取工艺。方法:用半胱氨酸盐酸盐溶液在碱性条件下提取薏苡仁蛋白,对影响蛋白提取的因素进行单因素考察。结合单因素考察结果,选取浸提温度、浸提p H、料液比、浸提时间设计4因素3水平的正交试验,分析各因素对结果的影响及因素间交互作用。结果:薏苡仁水溶性蛋白最佳提取工艺为:浸提温度40℃,浸提p H 10,料液比1∶20,浸提时间4 h。温度与料液比、温度与时间的交互作用会降低蛋白浸提率。结论:优化后的提取工艺经济简单,稳定可行。

薏苡本草考证

从历代本草典籍记载发现薏苡仁别名、俗名较多,辨识难度大,在一定时期对生活实践,尤其是临床用药带来了不便。通过查阅考证古籍文献,发现了薏苡仁误认为"车前"的线索以及其与"草珠子"混用的最初时期,以期为以后深入研究薏苡仁的源流提供帮助。

Evolution and Domestication Footprints Uncovered from the Genomes of Coix

Coix lacryma-jobi,a plant species closely related to Zea and Sorghum,is an important food and medicinal crop in Asia.However,no reference genome of this species has been reported,and its exact phylogeny within the Andropogoneae remains unresolved.Here,we generated a high-quality genome assembly of coix comprising～1.73 Gb with 44485 predicted protein-coding genes.We found coix to be a typical diploid plant with an overall 1-to-1 syntenic relationship with the Sorghum genome,despite its drastic genome expansion(～2.3-fold)due mainly to the activity of transposable elements.Phylogenetic analysis revealed that coix diverged with sorghum～10.41 million years ago,which was～1.49 million years later than the divergence between sorghum and maize.Resequencing of 27 additional coix accessions revealed that they could be unambiguously separated into wild relatives and cultivars,and suggested that coix experienced a strong genetic bottleneck,resulting in the loss of about half of the genetic diversity during domestication,even though many traits have remained undomesticated.Our data not only provide novel comparative genomic and evolutionary insights into the Andropogoneae lineage,but also an important resource that will greatly benefit molecular breeding of this important crop.

黔北地区薏苡高产栽培最佳行窝距及最适播种量探讨

以兴仁白壳薏苡(Coix lachryma-jobi L.)为材料,通过随机区组设计,探讨不同种植密度对薏苡产量及构成因子的影响。结果表明,行窝距和播种粒数对产量的影响的主效均达极显著差异水平,二者的互作也达显著差异水平。不同行窝距间的薏苡单产以80×60 cm最高,不同播种粒数间的单产以6粒/窝最高,各处理间单产以行窝距80×80 cm、播种粒数6粒/窝为最高。不同窝行距对株高、株穗数、株粒数、百粒重有明显影响,对窝株数影响不大;不同播种量对株高、株粒数、百粒重、窝株数有影响,对株穗数影响不大。

发芽前后薏苡仁中多糖含量变化分析

对4个品种薏苡（Coix lacrytruz-jobiL．var．ma—yuenStapf）仁芽前后的多糖含量进行测定，结果表明，不同品种薏苡仁中的多糖含量不同，发芽后各品种薏苡仁中多糖含量均有所上升，不同品种薏苡仁多糖含量的上升幅度也有较大差异。台安农种薏苡仁发芽前多糖含量最高．发芽后其多糖含量的上升幅度也最大，上升率高达24．86％；安国五谷的多糖含量在发芽前后都最低，但其上升幅度也较大，上升率为17．92％；临沂薏苡仁多糖含量在发芽前后变化幅度最小，上升率仅为2．72％。

薏苡种质资源的AFLP遗传多样性分析

薏苡是传统药食兼用经济作物,本研究基于AFLP分子标记技术对来自贵州、云南、广西3省24份优良材料的遗传多样性和亲缘关系进行分析,以期为薏苡杂交组合选配和种质创制提供遗传基础。结果表明:我们筛选出的8对引物组合共扩增条带996个,其中多态性为792条,多态性百分率的平均为79.52%,揭示薏苡种质中存在丰富遗传多样性;24份种质的遗传距离范围在0.189 6~0.485 4之间,相似系数变异范围为0.615 5~0.840 4,平均相似系数为0.730 9,薏苡种质资源的遗传相似系数较小;根据遗传相似性系数进行聚类分析,当遗传相似系数为0.718 5时,24份薏苡种质资源在遗传聚类上被分为Ⅰ、Ⅱ、Ⅲ和Ⅳ大类,其中CK与S1种质资源分别为第Ⅰ、Ⅳ类群,由Y81、Y81F组成第Ⅲ类群,第Ⅱ类又可以分为3个亚类有20份种质;主成分分析发现材料间分布分散,说明24份薏苡种质资源之间存在较大遗传变异,分子主效应分析结果与分子聚类结果一致。从而说明AFLP是研究薏苡种质资源遗传多态性及亲缘关系的有效手段之一,为薏苡亲本组合选配、种质创制和遗传育种提供遗传基础数据。

薏苡ramosa2基因的克隆及表达分析

ramosa基因属于LBD基因家族,在植物侧生器官原基的启动和形态形成中发挥重要作用。为了解薏苡ramosa基因的功能及表达特征,本研究采用RT-PCR和RACE技术克隆获得薏苡ramosa2(ClRA2)基因,并对其序列的生理生化特征及表达模式进行分析。ClRA2 cDNA序列全长1421 bp,ORF长813 bp,编码270个氨基酸,含有LOB结构域,位于26~124位置,属于LBD基因家族。ClRA2相对分子质量为49.96 kD,等电点为9.08,属于疏水性的不稳定蛋白。分子进化树分析发现ClRA2与高粱SbRA2亲缘关系最近。实时荧光定量PCR检测结果表明,ClRA2在根中的表达丰度最高,表达量远高于茎和花穗。本研究为解析ClRA2基因功能及其调控薏苡侧生器官发育机制提供了理论基础。

薏苡核心种质甘油三酯含量测定及遗传多样性分析

以中国西南地区53份薏苡核心种质为材料,进行种仁5种甘油三酯含量检测和SSR遗传关系分析。结果表明:不同薏苡种质种仁中5种甘油三酯含量存在广泛变异,变异系数为47.56%~58.24%,遗传多样性指数为5.78~5.84。1-棕榈酸-2-油酸-3-亚油酸甘油酯含量最高,其次为三油酸甘油酯、1,2-亚油酸-3-油酸甘油酯和1,2-油酸-3亚油酸甘油酯,三亚油酸甘油酯含量最低,5种甘油三酯成分含量呈显著正相关。利用20对SSR引物对核心种质进行扫描,种质间表现了较高的遗传多样性,遗传相似系数为0.29~0.85。薏苡核心种质基于甘油三酯含量的聚类分析结果同基于遗传相似系数的聚类分析结果基本一致,本研究结果为高油薏苡种质创新及品种选育提供了理论依据。

薏苡仁中1个新的生物碱类化合物

目的研究禾本科植物薏苡Coix lacryma-jobi的种仁(薏苡仁)非脂溶性部位的化学成分。方法运用正相硅胶、反相ODS及半制备型高效液相色谱技术进行系统的分离纯化,并结合多种波谱方法进行结构鉴定。结果从薏苡仁正丁醇部位分离得到5个生物碱类化合物,分别鉴定为(2R)-2-O-(β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl)-7-methoxy-1,4(2H)-benzoxazin-3-one(1)、methyl dioxindole-3-acetate(2)、(3S)-1,2,3,4-四氢-β-咔啉-3-羧酸(3)、cordysinin B(4)、色氨酸(5)。结论化合物1为未见文献报道的新化合物,命名为薏苡仁苷C(coixlachryside C),化合物3和4为首次从薏苡属植物中分离得到。