[Objectives]This study was conducted to identify and compare Borreria stricta(Linn.f.)G.Mey.and Borreria latifolia(Aubl.)K.Schum.,so as to provide a basis for their pharmacognostic identification.[Methods]The identifi...[Objectives]This study was conducted to identify and compare Borreria stricta(Linn.f.)G.Mey.and Borreria latifolia(Aubl.)K.Schum.,so as to provide a basis for their pharmacognostic identification.[Methods]The identification of B.stricta and B.latifolia was carried out by identification of origin,character identification,microscopic identification.[Results](i)Identification of origin:①B.stricta:B.stricta is an annual erect slender herb.The stem is quadrangular,rarely branched.The leaves are leathery,nearly sessile,fusiform or lanceolate bar-shaped,tapered at the top,narrowed at the base,and rough on both sides.When fresh,they are dark green.The stipules are nearly glabrous,and there are spines longer than the inflorescence at the top.②B.latifoli:B.latifoli is an annual loose stout herb,covered with hair.The stem is quadrangular,and has narrow wings on the edges.The leaves are elliptic or oval and oblong,yellow green when fresh.The stipules are membranous and covered with coarse bristles,and they have bristles longer than the sheath on the top.(ii)Character identification:①B.stricta:The roots of B.stricta has a rough,dense and hard texture with many transverse folds on the surface and many fiber thorns and cracks on the fracture surface.B.stricta tastes bitter.②B.latifoli:The roots of B.latifoli is slightly fleshy,flexible and hard to be broken.The stem is obviously quadrangular,hairy.B.latifoli tastes bitter and irritative.(iii)Microscopic identification:①B.stricta:The false annual rings are obvious in the cross section of the roots of B.stricta.The cross section of the stem looks like a round square with four short wings at the corners.Calcium oxalate needle crystal bundles can be seen in the leaf cross section.②B.latifoli:Calcium oxalate needle crystal bundles can be seen in the root and stem cross sections of B.latifoli.The cross section of the stem is unrepresentative square,with wide and long wings at the corners.In the cross section of leaves,non-glandular hairs can be seen in the upper and lower epidermis cells.[Conclusions]The above three identification methods can effectively identify B.stricta and B.latifolia.展开更多
The effects of 1-methylcyclopropene (1-MCP) on postharvest quality of Zizania latifolia during storage at 25˚C were investigated. The results pointed out that a postharvest application of 1-MCP maintained the good vis...The effects of 1-methylcyclopropene (1-MCP) on postharvest quality of Zizania latifolia during storage at 25˚C were investigated. The results pointed out that a postharvest application of 1-MCP maintained the good visual appearance of fresh Z. latifolia, inhibited browning, mildew and weight loss at the bottom of Z. latifolia, and there is no significant changes on L, a*, b* and ΔE during the whole storage period. In addition, 1-MCP treatment inhibited the respiratory intensity of Z. latifolia during the first three days of storage, but it was significantly higher than that of the control on the sixth day of storage. Compared with the control, 1-MCP treatment maintained relatively high SOD, CAT, APX activities and low PAL, POD, PLD, lipase and LOX activities, delayed the decline of AsA content, reduced the accumulation of O<sub>2</sub><sup>-</sup>, H<sub>2</sub>O<sub>2</sub> and MDA, and ultimately maintained the integrity of cell structure and delayed the senescence of Z. latifolia. In addition, positive effects of 1-MCP on maintaining the cell structure integrity were observed in this investigation throughout the storage period at 25˚C.展开更多
为探究广叶绣球菌采后聚丙烯膜包装在4℃贮藏期间、热风干燥、冷冻干燥挥发性风味物质变化,采用顶空固相微萃取结合气相色谱-质谱联用技术(headspace solid phase microextraction combined with gas chromatographymass spectrometry,H...为探究广叶绣球菌采后聚丙烯膜包装在4℃贮藏期间、热风干燥、冷冻干燥挥发性风味物质变化,采用顶空固相微萃取结合气相色谱-质谱联用技术(headspace solid phase microextraction combined with gas chromatographymass spectrometry,HS-SPME-GC-MS)进行检测和分析。结果表明,新鲜的广叶绣球菌中共检测出30种挥发性物质,主要的成分为1-辛烯-3-醇、3-辛醇和反式-2-辛烯-1-醇。与鲜菇相比,聚丙烯膜包装贮藏期间挥发性风味成分的种类有所增加。鲜菇到贮藏第21 d其整体风味成分较为接近,以醇类化合物为主;而第28~49 d风味成分则以酮类和醇类化合物为主。热风干燥后检出66种挥发性物质,其中5-甲基-2-乙酰基呋喃的相对含量最高(58.693%);冷冻干燥后检出40种挥发性物质,其中以3-辛醇为主的醇类物质和以3-辛酮为主的酮类物质相对含量较高,分别为41.567%和45.723%。鲜菇经热风干燥后整体风味成分差异较大,经冷冻干燥后其整体风味较为接近。由此可知,广叶绣球菌聚丙烯膜包装贮藏28 d内能较好保持原有风味;相对于热风干燥,冷冻干燥能较好保持广叶绣球菌原有风味。本研究有助于深入了解广叶绣球菌风味特征,并根据挥发性成分变化规律可有效区分不同贮藏时期,为后续保鲜方法的改进和综合开发利用提供一定的理论基础。展开更多
基金Supported by Guangxi Science and Technology Base and Talent Project(GK AD21238031GK AD19245090)+10 种基金Guangxi Key Research and Development Project(GK AB21196016)"Guipai Xinglin Young Talents"Project of Guangxi University of Chinese Medicine(2022C030)Collaborative Innovation Center of Zhuang and Yao Ethnic Medicine(GJKY[2013]20)Guangxi Key Laboratory of Zhuang and Yao Ethnic Medicine(GKJZ[2014]32)Guangxi Science and Technology Base and Talent Project(GK AD21238031Engineering Research Center of Ethnic Medicine Resources and Application(Guifa Gai High Technology Letter[2020]2605)Guangxi Key Discipline of Tradition Chinese Medicine:Zhuang Pharmacology(GZXK-Z-20-64)The Eighth Batch of Guangxi Specially-employed Expert Projects(GRCTZ[2019]13)Guangxi Zhuang Autonomous Region Philosophy and Social Science Planning Research Project(20BMZ005)Foreign Expert Project of the Ministry of Science and Technology of the People's Republic of China(GXL20200233001)Guangxi First-class Discipline of Traditional Chinese Medicine:Ethnic Medicine(GJKY[2018]12).
文摘[Objectives]This study was conducted to identify and compare Borreria stricta(Linn.f.)G.Mey.and Borreria latifolia(Aubl.)K.Schum.,so as to provide a basis for their pharmacognostic identification.[Methods]The identification of B.stricta and B.latifolia was carried out by identification of origin,character identification,microscopic identification.[Results](i)Identification of origin:①B.stricta:B.stricta is an annual erect slender herb.The stem is quadrangular,rarely branched.The leaves are leathery,nearly sessile,fusiform or lanceolate bar-shaped,tapered at the top,narrowed at the base,and rough on both sides.When fresh,they are dark green.The stipules are nearly glabrous,and there are spines longer than the inflorescence at the top.②B.latifoli:B.latifoli is an annual loose stout herb,covered with hair.The stem is quadrangular,and has narrow wings on the edges.The leaves are elliptic or oval and oblong,yellow green when fresh.The stipules are membranous and covered with coarse bristles,and they have bristles longer than the sheath on the top.(ii)Character identification:①B.stricta:The roots of B.stricta has a rough,dense and hard texture with many transverse folds on the surface and many fiber thorns and cracks on the fracture surface.B.stricta tastes bitter.②B.latifoli:The roots of B.latifoli is slightly fleshy,flexible and hard to be broken.The stem is obviously quadrangular,hairy.B.latifoli tastes bitter and irritative.(iii)Microscopic identification:①B.stricta:The false annual rings are obvious in the cross section of the roots of B.stricta.The cross section of the stem looks like a round square with four short wings at the corners.Calcium oxalate needle crystal bundles can be seen in the leaf cross section.②B.latifoli:Calcium oxalate needle crystal bundles can be seen in the root and stem cross sections of B.latifoli.The cross section of the stem is unrepresentative square,with wide and long wings at the corners.In the cross section of leaves,non-glandular hairs can be seen in the upper and lower epidermis cells.[Conclusions]The above three identification methods can effectively identify B.stricta and B.latifolia.
文摘The effects of 1-methylcyclopropene (1-MCP) on postharvest quality of Zizania latifolia during storage at 25˚C were investigated. The results pointed out that a postharvest application of 1-MCP maintained the good visual appearance of fresh Z. latifolia, inhibited browning, mildew and weight loss at the bottom of Z. latifolia, and there is no significant changes on L, a*, b* and ΔE during the whole storage period. In addition, 1-MCP treatment inhibited the respiratory intensity of Z. latifolia during the first three days of storage, but it was significantly higher than that of the control on the sixth day of storage. Compared with the control, 1-MCP treatment maintained relatively high SOD, CAT, APX activities and low PAL, POD, PLD, lipase and LOX activities, delayed the decline of AsA content, reduced the accumulation of O<sub>2</sub><sup>-</sup>, H<sub>2</sub>O<sub>2</sub> and MDA, and ultimately maintained the integrity of cell structure and delayed the senescence of Z. latifolia. In addition, positive effects of 1-MCP on maintaining the cell structure integrity were observed in this investigation throughout the storage period at 25˚C.
