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Development,differentiation,and material distribution of secondary phloem in Pinus massoniana

林业研究:英文版 2023年第6期34卷 1915-1926页

作者： Chao Yang Fuhua Fan Gang Xu Guijie Ding Institute for Forest Resources and Environment of Guizhou Province Guizhou UniversityGuiyang 550025People’s Republic of China Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province Guiyang 550025People’s Republic of China College of Forestry Guizhou UniversityGuiyang 550025People’s Republic of China

Phloem is the woody tissue for the storage and long-distance transport of organic matter in vascular *** reveal the process of secondary phloem development and differentiation in Pinus massoniana,the structure of the secondary phloem and the distribution of cell inclusions were observed by histochemical staining,spontaneous fluorescence of phenolic substances and cell *** on tissue development and differentiation characteristics of *** secondary phloem,the secondary phloem development was divided into seven stages:the functional phloem stage;the sieve cell lignification stage;the phloem ray bending stage;the parenchyma cell dedifferentiation and division stage;the dedifferentiated parenchyma cell population formation stage;the periderm alteration stage,and the rhytidome *** analysis of cell morphology and inclusion distribution characteristics showed that the sieve cells were deformed during lignification,the quantities of parenchyma and resin ducts increased with development and the crystal content in cells,as well as the levels of sugars and lipids in phloem parenchyma cells,increased with *** results indicate that the *** phloem first lost longitudinal transport function and then increased its secretory,storage and mechanical ***,the parenchyma differentiated into the cortex and periderm,and the tissue outside the new periderm lignified to form the rhytidome,which fully developed into the protective tissue of the stem.

关键词： P.massoniana Phloem periderm Lignifi cation Inclusion

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Internal Microanatomy and Zoological Affinity of the Early Cambrian Olivooides

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Acta Geologica Sinica(English Edition) 2016年第1期90卷 38-65页

作者： Han Jian LI Guoxiang KUBOTA Shin OU Qiang TOSHINO Sho WANG Xing YANG Xiaoguang UESUGI Kentaro MASATO Hoshino SASAKI Osamu KANO Harumasa SATO Tomohiko KOMIYA Tsuyoshi Early Life Institute and Department of Geology and State Key Laboratory of Continental Dynamics Northwest University229 Taibai RoadXi'an 710069China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China Seto Marine Biological Laboratory Field Science Education and Research CenterKyoto UniversityShirahamaNishimuroWakayama 649-2211Japan Early Life Evolution Laboratory School of Earth Sciences and ResourcesChina.University of GeosciencesBeijing 100083China Graduate School of Fisheries Sciences Kitasato University1-15-1 KitasatoSagamiharaKanagawa 252-0373Japan Japan Synchrotron Radiation Research Institute(JASRI)1-1-1 Kouto Sayo-choSayo-gunHyogoJapan Tohoku University Museum Tohoku University6-3 AobaAramakiAoba-kuSendaiJapan Department of Earth Science and Astronomy Graduate School of Arts and SciencesThe University of TokyoTokyo 153-8902Japan

The early Cambrian pentamerous microfossil Olivooides/Punctatus in South China, which is characterized by a diagnostic stellate tubular apex, has been well-known for its almost complete development sequence that can be confidently traced from embryos and hatched juveniles, to conical adults. However, its zoological affinity remains highly controversial. Here we describe the internal microanatomic structures of the soft-body inside the peridermal theca of Olivooides multisulcatus Qian, 1977, including interradial pairs of tentacles, adradial and perradial frenula, perradial oral marginal lappets and twins of perradial gastric saccule-like humps as well as a circular velarium with striated coronal muscles. Particularly, one specimen shows bifurcated velarial canals along the bell aperture. Both the components of the soft-body and the external theca （or cyst） are arranged in perfect pentaradial symmetry. These characteristics are more compatible with those of living cubomedusans and co-occurring Cambrian athecate embryonic cubozoans. Concerning the presence of peridermal theca, Olivooides most likely represents an extinct thecate stem-group cubomedusae but devoid of both perradial eyes and specialized pedalia. The well-grown soft body inside the peridermal tube displays a set of mixed features of both polyp and medusa.

关键词： Embryos periderm cnidarians cubozoan early Cambrian Kuanchuanpu Formation

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Pharmacognostic standardization of stems of Thespesia lampas(Cav.)Dalz & Gibs

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Asian Pacific Journal of Tropical Biomedicine 2012年第5期2卷 357-363页

作者： Chumbhale DS Upasani CD Department of Pharmacognosy Amrutvahini College of Pharmacy SNJB'S Shriman Sureshdada Jain College of Pharmacy

Objective:To establish the standardization parameters for complete pharmacoguoslic evaluation of stems of Tlespesia lampas(***)(Cav.) Dalz & Gibs(Malvaceae),an important planl in the Indian system of ***:Morphological,microscopical,physico-chemical evaluations,florescence analysis of *** stems were investigated and preliminary phytochemical analysis,GO-MS analysis and HPTLC fingerprinting were carried out for qualitative phytochemical evaluation of various extracts of stems of ***:Chemomieroscopy revealed the presence of *** grains and calcium oxalate *** evaluation used to detennine numerical slandards showed a result with total ash(9.03± 0.05)%w/w,acid insoluble ash(1.50±0.01)%w/w,water soluble ash(2.51±0.02)%w/w,sulphated ash(7.50+0.01)%w/w,ethanol soluble extractive(0.24±0.02)%w/w,water soluble extractive(0.08 ±0.01)<7,w/w,moisture content(6.03±0.05)%w/w and total crude fibre content of stem powder(47.36±0.32)%w/*** characteristics of the stem powder showed presence of steroids, starch,alkaloid,flavonoids and *** phytochemical analysis revealed presence of glycosides,phenolic compounds,tannins,steroids,saponins,flavonoids,carbohydrates and ***-MS analysis showed the presence of fatty acids such as dodecanoic acid, lelraclecanoic acid,n-hexadecanoic acid,9-lelradecenal and HPTLC fingerprinting revealed the presence of β-sitosterol and quercetin in stems of ***:The pharmacognostic standardization of *** is useful towards establishing standards for quality, purity and sample identification.

关键词： Thespesia lampas Stems Pharmacognosy Malvaceae Physicochemical analysis Preliminary phytochemical testing GC-MS analysis Phelloderm periderm Xylem

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