Forest Herbarium

Chatuchak, Thailand

Forest Herbarium

Chatuchak, Thailand
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Ngernsaengsaruay C.,Kasetsart University | Suddee S.,Forest Herbarium
Thai Forest Bulletin (Botany) | Year: 2016

Garcinia nuntasaenii Ngerns. & Suddee (Clusiaceae), a new species from north-eastern Thailand, is described and illustrated. It is a dioecious shrub in dry evergreen forest at ca 150-220 m altitude. © 2016 The Forest Herbarium.

Phuphathanaphqng L.,Forest Herbarium | Poopath M.,Forest Herbarium
Thai Forest Bulletin (Botany) | Year: 2016

A new species, Abutilon substellatum Phuph. & Poopath, is described and contrasted to its nearest ally, A. persicum (Burm.f.) Merr. © 2016 The Forest Herbarium.

Ito Y.,University of Canterbury | Tanaka N.,Tsukuba Botanical Garden | Pooma R.,Forest Herbarium | Tanaka N.,Kochi Prefectural Makino Botanical Garden
Biodiversity Data Journal | Year: 2014

Indo-China floristic region is among the 34 richest floristic regions of the world, and its plant diversity is still under investigation. Here we report a new record of an aquatic plant, Potamogeton distinctus, from Myanmar, a part of the region, that is detected by means of DNA barcoding method. The molecular method further identified the other specimens as hybrids of Potamogeton: one is P. ×malainoides (P. distinctus × P. wrightii), and the other is P. distinctus × P. nodosus. The first of these was thus far genetically confirmed in China, but the parental combination of the hybrid in Myanmar was reciprocal to those reported from China. The second hybrid was also recorded from China, but the maternal lineage was revealed for the first time, in this case it was P. distinctus. The present study showed that 1) nrITS is useful to distinguish closely related Potamogeton species as well as hybrids among them and 2) atpB-rbcL has higher utility than other frequently used plastid DNA markers. We thus propose nrITS and atpB-rbcL as DNA barcoding markers for future Potamogeton studies. © Ito Y et al.

Poulsen A.D.,Royal Botanic Garden Edinburgh Edinburgh Scotland | Phonsena P.,Forest Herbarium
Nordic Journal of Botany | Year: 2017

Etlingera pavieana (Zingiberaceae) was originally described from Cambodia and is used as a spice or as medicine. Recent collections enable us to provide a complete description with improved illustrations and knowledge on distribution which now also includes Laos, Thailand and Vietnam. Information on local names and uses are also included. Amomum hirticalyx is newly combined as a subspecies of E. pavieana and one of the two collections made by Schmidt on Ko Chang, Thailand, is designated here as the lectotype. Etlingera pavieana subsp. hirticalyx differs mainly by height and leaf size and is only known from Ko Chang. We report E. pavieana to be flexistylous for the first time. This was observed in both subspecies. © 2017 Nordic Society Oikos.

Chamchumroon V.,Forest Herbarium | Poopath M.,Forest Herbarium | Wai J.S.,Prince of Songkla University
Thai Forest Bulletin (Botany) | Year: 2015

Maingaya malayana Oliv. (Hamamelidaceae), a new genus and species record for Thailand, is described and illustrated.

Chantanaorrapint S.,Prince of Songkla University | Wai J.S.,Prince of Songkla University | Poopath M.,Forest Herbarium | Tetsana N.,Forest Herbarium
Phytotaxa | Year: 2016

Thismia claviformis Chantanaorr. & J. Wai, is described and illustrated as a new species from the Thai-Malay Peninsula. The new species is characterized by 1) vermiform underground parts, 2) equal perianth lobes with slender claviform appendages, 3) a perianth tube without transverse bars inside, and 4) the apex of stamen bearing two triangular lobes. A taxonomic description, illustrations of the new species and a comparison with the related species are presented. © 2016 Magnolia Press.

Chantanaorrapint S.,Prince of Songkla University | Tetsana N.,Forest Herbarium | Sridith K.,Prince of Songkla University
Polish Botanical Journal | Year: 2015

Thismia clandestina (Blume) Miq., a rare mycoheterotrophic species previously known only from Indonesia, was newly discovered in tropical lowland forest in southern Thailand. A description, line drawings and photographs are provided, and its diagnostic characters and geographical distribution are briefly discussed.

Gale S.W.,Kadoorie Farm and Botanic Garden | Suddee S.,Forest Herbarium | Watthana S.,Queen Sirikit Botanic Garden
Kew Bulletin | Year: 2013

Summary: A new one-flowered species of Nervilia is described and illustrated from plants collected in Nakhon Ratchasima Province, eastern Thailand. The glabrous, angular leaf of Nervilia khaoyaica Suddee, Watthana & S. W. Gale affiliates it to the taxonomically difficult and widespread Nervilia adolphi-punctata species alliance of Section Linervia, but it is otherwise readily distinguished by its broad, oblong-obovate lip with a saccate base and obscure, rounded side lobes below the middle, and by the striking colouration of the disk. © 2013 The Board of Trustees of the Royal Botanic Gardens, Kew.

Pumsalid K.,Lampang Rajabhat University | Thaisuchat H.,Lampang Rajabhat University | Loetchutinat C.,Chiang Mai University | Nuntasaen N.,Forest Herbarium | And 2 more authors.
Natural Product Communications | Year: 2010

Chromatographic separation of the ethyl acetate extract of roots of Polyalthia cerasoides has led to the isolation of the new compound, 6,8-dihydroxy-7-methoxy-1-methyl-azafluorenone. This compound exhibited potent cytotoxic activities with IC50 values in the range of 2.64-3.58 μg.mL-1 for A549, GLC4 and GLC4/Adr cells, but was not recognized by ABCC1/MRP1 protein. The compound also showed very strong inhibition of M. tuberculosis using a broth microdilution method, with an MIC value of 0.78 μg.mL-1, which was equal to that of ofloxacin, one of the four antibiotic drugs used as a positive control.

Uadkla O.,Lampang Rajabhat University | Yodkeeree S.,Chiang Mai University | Buayairaksa M.,Lampang Rajabhat University | Meepowpan P.,Chiang Mai University | And 3 more authors.
Pharmaceutical Biology | Year: 2013

Context: Pseuduvaria rugosa (Blume) Merr. (Annonacaea) grows widely in the south and southeast regions of Thailand. Preliminary screening for biological activities revealed that crude hexane, ethyl acetate, and acetone extracts from mixtures of leaves and twigs of P. rugosa showed cytotoxicity. Objective: Chemical constituents and their antiproliferative activity in K562, U937, and HL-60 human leukemic cell lines from P. rugosa were performed for the first time. Materials and methods: The isolated compounds were obtained from chromatographic separation. The structures were established by spectroscopic techniques including IR, UV, NMR together with 2D NMR (HMBC, COSY, and NOE) and MS. The K562, U937, and HL-60 cell lines were treated with isolated aporphine alkaloids (0-100g/mL) and cell viability was measured with the MTT assay. Cell cycle analysis was performed using propidium iodide (PI) based staining methods. Results: Two known aporphine alkaloids, 1,2,3-trimethoxy-5-oxonoraporphine (1) and ouregidione (2) were isolated. Treatment of the cells with compounds 1 and 2 at a concentration of 100 g/mL for 72h reduced the viability of K562, U937, and HL-60 cell lines to 63 and 64, 38 and 66, and 49 and 64%, respectively. In addition, compounds 1 and 2, at a concentration of 100g/mL, exposed to U937 and HL-60 cell lines showed cell cycle arrest. The U937 cell line treated with compounds 1 and 2 increased significantly the proportion of the cell in S phase, whereas the HL-60 cell line-induced G2/M and G1 phase, respectively. Discussion and conclusion: The results showed that 1,2,3-trimethoxy-5-oxonoraporphine and ouregidione-induced cytotoxicity with HL-60, U937, and K562 cells where 1,2,3-trimethoxy-5-oxonoraporphine was more active than ouregidione. © 2013 Informa Healthcare USA, Inc.

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