Bangladesh Journal of Plant Taxonomy

Pollen morphology of section Cheirolepis Boiss. of the genus Centaurea L. (Asteraceae) in Turkey

2019-12-23T16:14:29+00:00

In this paper, the palynomorphology of 17 taxa of section Cheirolepis in Turkey, were investigated by light (LM) and scanning electron microscope (SEM). Detailed descriptions of the pollen grains were given for each taxon and a well-resolved dendrogram was generated through numerical analysis of palynological diagnostic features. The pollen grains were found to be radially symmetric, isopolar, and generally 3-zonocolporate, with the exception of C. derderiifolia, C. kotschyi var. floccosa, and C. saligna, which were also 4-zonocolporate. The shape of the pollen grains were prolatespheroidal, with the polar axes of 32.76–46.26 μm and equatorial axes of 31.86–45.82 μm. The sculpturing of the pollen grains was generally scabrate-perforate or rarely microechinate-perforate. The spines were conical with a changing base length. The length and the width of the spines varied between 0.48 and 2.28 μm and 0.4 and 3.39 μm, respectively. The number of perforations at the base of the spines ranged in two or more
rows and they varied between 5 and 30. The number of spines was 16–70 in 10 μm2. The results of this study showed that the polar axes, equatorial axes, aperture type, pollen shape, spine length, perforation number, and number of spines in 10 μm2 are essential for distinguishing the studied taxa. The taxa were grouped by clustering analysis of selected pollen characters using the UPGMA method.

New records of three species and a genus of angiosperms for Bangladesh

2019-12-23T16:14:32+00:00

Three species viz., Cayratia maritima Jackes of family Vitaceae Juss., Leptadenia reticulata (Retz.) Wight & Arn. of Apocynaceae Juss. and Oberonia disticha (Lam.) Schltr. of Orchidaceae Juss. have been reported here for the first time from Sundarban Mangrove Forest of Bangladesh. The genus Leptadenia R.Br. is a new addition to the Angiosperms of Bangladesh. Taxonomic description, photographs and illustrations of these species have been provided.

Pollen morphology and its systematic implication on some species of Artemisia L. from Gilgit-Baltistan Pakistan

2019-12-23T16:14:33+00:00

This study was accomplished to scrutinize the pollen morphology of 15 species of the genus Artemisia of the family Asteraceae from Gilgit-Baltistan region of Pakistan by means of scanning electron microscopy (SEM). Results revealed pollen grains of Artemisia species with tricolporate shape, and characterized by globular symmetry (ellipsoid ball shaped from equatorial side and three lobed rounds from polar view) with few exceptions. Additionally, the pollens are marked with reduced spinules on their surfaces which are diagnostic character for the genus Artemisia. In this study, seven micromorphological characters of pollen grains of 15 Artemisia species viz. shape of pollen, arrangement of spinules, exine sculpture, spinules base, equatorial width and polar length, were employed to construct a dendrogram following the consequential cluster analyses. In the dentrogram, four groups within the studied Artemisia species have been recognized. The pollen morphology of Artemisia could be a good taxonomic marker to cope with its taxonomic delimitations in combination with other floral and molecular attributes.

Morphological and molecular identification of ten plant pathogenic fungi

2019-12-23T16:14:35+00:00

Ten pathogenic fungi of Deuteromycetes were isolated from seven angiospermic hosts such as pointed gourd, tomato, rice, wheat, maize, chickpea and jute. Morphological characterization and molecular analyses were performed for accurate identification of the isolated pathogenic fungi. The sequence results obtained using the ITS1 and ITS4 primers were compared with NCBI GenBank and BOL database using BLAST analysis. Fusarium chlamydosporum and Penicillium pinophilum are recorded first time from Bangladesh.

New records of phytoplankton for Bangladesh: Division - Cryptophyta

2019-12-23T16:14:37+00:00

The paper records 6 species of freshwater phytoplankton from the algal Division Cryptophyta. The species are Cryptomonas pyrenoidifera Geitler, C. caudata Schiller, C. tetrapyrenoidosa Skuja, Chroomonas breviciliata Nygaard, C. reflexa Kiss. and Cyathomonas truncata (Fres.) Fisch HP. These are newly recorded species from Sylhet Division of Bangladesh.

Distribution and characterization of Aegilops cylindrica host from Iran

2019-12-23T16:14:38+00:00

Jointed goatgrass (Aegilops cylindrica Host; 2n = 4x = 28, C^cC^cD^cD^c) is a tetraploid remote relative of bread wheat (Triticum aestivum L; 2n=6x=42, AABBDD) with two genomes and 28 chromosomes. The diversity center of this species is in the Fertile Crescent and in central Asia and could also be found in many places in Iran. In this experiment, 359 accessions provided by National Plant Gene Bank of Iran (NPGBI) were used. Based on the geographical distribution, the highest distribution of A. cylindrica is found in North, West and North-West regions of Iran. The data on the distribution of A. cylindrica showed that its distribution centers in Iran are more than those reported in the previous studies. Chromosome counting showed that all A. cylindrica accessions are tetraploid (2n=4x=28). Results of factor analysis for nine morphological chromosome traits showed that karyotypic variation within accessions are related to the length of chromosomes and there is difference between the accessions for their total chromosome length, but the karyotype of different accessions are almost the same for the symmetry. Low coefficient of variation in morphological traits as well as symmetric karyotypes of A. cylindrica species observed in this study could lead us to predict that A. cylindrica could be a recently evolved species among the remote relatives of bread wheat.

Three new species records of the genus Pinalia Lindl. (Orchidaceae) for Bangladesh

2019-12-23T16:14:39+00:00

Pinalia obesa (Lindl.) Kuntze, Pinalia spicata (D. Don) S. C. Chen & J. J. Wood and Pinalia acervata (Lindl.) Kuntze of the family Orchidaceae have been reported here as new angiospermic record for Bangladesh flora. Detailed examination with description, flowering time, ecology and geological distribution of the species has been provided here with illustration and photographs.

DNA barcoding and morpho-anatomical characters of two forms of Convolvulus arvensis L. (Convolvulaceae) grown in Asir region, Saudi Arabia

2019-12-23T16:14:40+00:00

DNA barcoding and morpho-anatomical characters of two forms of Convolvulus arvensis L. growing in Asir region, Saudi Arabia were studied. We applied three molecular markers, ITS, rbcL and matK for phylogenetic reconstruction in combination with 24 morpho-anatomical characters to provide proposal for the recognition of its population under two forms. Plant samples were collected from ten various populations of C. arvensis supposed to be of two different forms, and finally these have been found to be of two new forms (small leaf) and form (large leaf) for the flora of Saudi Arabia. TWINSPAN results showed that there was negative group with twenty one objects including stem length, stem thickness, seed shapes, petiole length, leaf apex, leaf length, petal circumference, leaf width, capsule length, capsule width, stamen length, anther width, anther length, carpel length, venations type, pollen grains shape, T.S of stem, root and leaf, stigma shape and anther base surface and positive group including hairs, stomata and anther shape. Dendrogram upon morpho-anatomical characters resolved two main clusters, one cluster of form (large leaf) and the other of form (small leaf). Amplified gene region for the form (small leaf)-rbcL showed 100% identity with C. lineatus; form (small leaf)-matK and form (large leaf)-matK had 99% identity with Calystegia sepium (L.) R. Br. Form of (small leaf)–ITS had 100% identity with that of C. arvensis; form (large leaf)-rbcL had 100% identity with those of C. arvensis and C. lineatus. Form (large leaf)–ITS had 99% identity with that of C. arvensis. The results of molecular phylogenetic analyses based on certain morphological and rbcL data support two main clusters within C. arvensis which is consistent with two forms, form (small leaf) and form (large leaf).

Morphological and anatomical investigation among six variants of Canna indica L.

2019-12-23T16:14:42+00:00

The present study explores detailed morphological and anatomical features of six variants of Canna indica L. Noticeable variations have been recorded in the morphology of six variants of C. indica especially on the basis of their different colours of leaves, flowers, staminodes and fruits. Root, stem and leaf anatomy of C. indica revealed little variation among the variants employed in the study. Phloem is 5-6 layered in the variant 2 (small red), 4-5 layered in the variant 4 (orange), and 3-4 layered in the remaining variants. The variant 4 (orange) can be distinguished from other five variants anatomically, by presence of 5-7 layers of schlerenchymatous tissue, and morphologically by its green pseudostem, ovate to obovate leaves, orange flowers, green bracts with maroon edges and orange-red staminodes. However, based on morphological and anatomical discrepancies the variants of Canna indica cannot be assigned to discrete taxonomic variety.

Ethnomedicinal study focusing on anti-diabetic plants used by the people living in and around Dhaka

2019-12-23T16:14:44+00:00

The present article mainly focused on the ethnomedicinal plants used by the community living in and around Dhaka to manage the diabetes. Ethnomedicinal data were collected using semi-structured interviews with key informants during June 2017 to July 2018 followed by field interviews, plant interviews, checklist interviews and group discussion techniques. A total of 92 ethnomedicinal plant species under 46 families have been documented. These species were used to treat 55 ailments through 200 formularies. Herbs are the most common medicinal plants in the study area followed by trees, shrubs and climbers. Leaf is mostly used for the preparation of herbal medicine. Among the total 92 ethnomedicinal plants, 11 species have been used for diabetes management by the community people. Disease category diabetes showed maximum factor informant
consensus value. Most cited ethnomedicinal plant species for the diabetes management are Gynura nepalensis DC., Coccinia grandis L. Voigt, Aloe vera (L.) Burm. f., Syzygium cumini (L.) Skeels, Swietenia mahagoni (L.) Jacq., Momordica dioica Roxb. ex. Willd., Catharanthus roseus (L.) G. Don, Streblus asper Lour., Bryophyllum pinnatum (Lamk.) Oken, Tamarindus indica L. and Scoparia dulcis L. The results in the present study for diabetes management were very preliminary and based on which sound conclusion was not possible. Further ethnopharmacological study is very essential on such species to validate their efficacy in the management of diabetes. Our findings also provide baseline data to establish a connection between the traditional users of medicinal plants and scientific communities, which can be substantial in novel drug discovery. Furthermore, ethnomedicinal data is of significant value for conservation managers and policy makers for sustainable management of ethnomedicinal plant species, which are under threat due to rapid urbanization.

Morpho-molecular characterization of Ceratobasidium sp.: A mycorrhizal fungi isolated from a rare epiphytic orchid Gastrochilus calceolaris (J. E. Sm.) D. Don

2019-12-23T16:14:46+00:00

A mycorrhizal fungus, Ceratobasidium sp. GC (NCBI Gene Bank Accession no GQ369961) associated with the roots of an epiphytic orchid Gastrochilus calceolaris was investigated by cultural morphology, microscopic features and molecular analysis of Internal Transcribed Spacer (ITS) regions sequences of nuclear ribosomal DNA. The colony appearance of the fungal endophyte was fluffy growth pattern and the colour of the young colony was milky white on both surfaces that turned in to brown at maturity on the upper surface and deep brown on reverse surface. The microscopic features of the fungus i.e. hyphal diameter, multi-nucleate vegetative cells, right angle branching pattern with slight constriction at branching point and a dolipore septum near the branching point were observed. All the characters corroborated the identity with anamorphic Rhizoctonia like fungi. The ITS regions sequences of nrDNA and phylogenetic analysis based on the neighbor-joining method showed clustered with Rhizoctonia like fungi, and the maximum identity (98.28%) with Ceratobasidium RR and Ceratobasidium FPUB isolated from Rhynchostylis retusa and Dactylorrhiza hetagera, respectively. Thus, the ITS of nrDNA sequences validated the morphological data. This is the first report of orchid mycorrhizal fungi from Bangladesh.

Morphological, palynological and phylogenetic relationships of Glaucium Mill. in Turkey

2019-12-23T16:14:48+00:00

Glaucium taxa were investigated in terms of their morphological, palynological and phylogenetical characteristic. The results of this study show differences between the taxa in some of these characteristics, especially in micromorphology and formation of clades in phylogenetic trees based on the matK and ITS3-6 DNA sequence data. Based on the findings of the molecular analyses supported by morphological data (stem’s trichomes),
the genus Glaucium of Turkey was divided into subsections Glabrousae and Pubescentae.

Angiospermic flora of Gafargaon upazila of Mymensingh district focusing on medicinally important species

2019-12-23T16:14:50+00:00

Gafargaon upazila has been floristically explored to identify and assess the angiospermic flora that resulted in occurrence of 203 taxa under 174 genera and 75 families. Magnoliopsida is represented by 167 taxa under 140 genera and 62 families, while Liliopsida is constituted by 36 taxa belonging to 34 genera and 13 families. Vegetation analysis shows that herbs are represented by 106 taxa, shrubs 35, trees 54, and climbers by 8 species. In Magnoliopsida, Solanaceae is the largest family possessing 10 species, whereas in Liliopsida, Poaceae is the largest family with 12 species. The study has identified 45 medicinal plants which are used for treatment of over 40 diseases including diabetes, ulcer, diarrhoea, dysentery, fever, cold and cough, menstrual problems, blood pressure and urinary disorders by the local people. Some noticeable medicinal plants used in primary healthcare are Abroma augusta (L.) L.f., Coccinia grandis (L.) Voigt., Commelina benghalensis L., Cynodon dactylon (L.) Pers., Holarrhena antidysenterica Flem., Glycosmis pentaphylla (Retz.) A. DC., Mikania cordata (Burm. f.) Robinson, Ocimum tenuiflorum L. and Rauvolfia serpentina (L.) Benth. A few number of species are also employed in cultural festivals in the study area. Cardamine flexuosa With., Oxystelma secamone (L.) Karst., Phaulopsis imbricata (Forssk.) Sweet, Piper sylvaticum Roxb., Stephania japonica (Thunb.) Miers and Trema orientalis L. have been found to be rare in the investigated area. In order to preserve botanical resources of Gafargaon upazila, particularly the rare, threatened and medicinal plants, conservation measures need to be undertaken through both in-situ and ex-situ methods for their sustainable use.

Angiosperms in Gobindaganj upazila of Gaibandha district, Bangladesh

2019-12-23T16:14:54+00:00

Angiosperms at Gobindaganj Upazila of Gaibandha district, Bangladesh was studied from January to December 2018. An extensive floristic survey and angiosperms collection have been made throughout the study area. A total of 295 species belonging to 246 genera under 89 families were recorded. Plant habit analysis shows that herbs, shrubs, climbers and trees are represented by 47.45%, 15.93%, 12.20% and 24.40%, respectively. Distribution of angiosperm species in the families shows variation. Asteraceae is the most dominant family represented by 25 species, followed by Fabaceae (19 species), Euphorbiaceae (18 species), Cucurbitaceae (17 species), Acanthaceae (11 species), Solanaceae (11 species), Amaranthaceae (10 species) and Apocynaceae (10 species). 44 families are represented by a single species each while 37 families are represented by 2 to 8 species each. Status of occurrence has been recorded for proper conservation management and sustainable utilization of the taxa which show 218 (73.89%) to be common, 63 (21.35%) as rare, 10 (3.38%) as vulnerable, and 4 (1.35%) are found as endangered in the study area. For each species scientific name, voucher number, Bangla name, English name, habit, status of occurrence and flowering time were recorded.

Minor edible fruits of Bangladesh

2019-12-23T16:14:57+00:00

Minor edible fruits are the genetic resource of a country, playing a vital role as food, nutrition and medicine. Bangladesh having both tropical and sub-tropical climatic condition possesses a large number of species that produce minor edible fruits. The present study represents 255 species of minor edible fruit yielding plants of Bangladesh. Of them, 242 species belong to 58 families of Magnoliopsida and 13 species to three families of Liliopsida. The large minor fruit yielding families are Euphorbiaceae (20 spp.), Myrtaceae (18 spp.), Moraceae (15 spp.), Arecaceae (11 spp.), Sapindaceae (11 spp.), Anacardiaceae (10 spp.), Annonacae (10 spp.), Rutaceae (8 spp.), Verbenaceae (8 spp.) and Vitaceae (8 spp.). Three species are aquatic in nature and about 50 species are herbs, including 31 species of climbers or lianas, and 49 are shrubs and the remaining 156 species are trees. About 48 species are cultivated for fruits and the 35 species are both cultivated and wild. The remaining species are exclusively wild. A total
of 53 exotic species are included in the cultivation. In most of the species, pericarp with mesocarp or the whole part of fruit is edible. In few cases either seed or kernel is edible, or in others the non-carpel part of flower. Summer is found as the most and winter as the least suitable fruit yielding seasons in a year.

Seed micromorphological study on endemic and subendemic species of Veronica L. (Plantaginaceae Juss.) in Iran

2019-12-23T16:15:00+00:00

Seed morphology of 12 Iranian endemic and subendemic species of Veronica was studied using scanning electron microscope (SEM). Seven qualitative and quantitative characters were measured using SEM micrographs and stereomicroscopy. The seed shape of most species is ovate and plano-convex. The size of seeds ranges from 1.25 x 0.75 mm in V. khorassanica to 2.5 x 1.75 mm in V. viscosa Boiss. The ornamentation of seed coat is reticulate-verrucate in V. khorassanica, V. czerniakowskiana, V. mazanderanae and V. rubrifolia, reticulate-rugate in V. acrotheca, V. aucheri, V. viscosa and V. intercedens, rugose in V. microcarpa, V. chionantha and V. rechingeri, and reticulate-porate in V. gaubae. The testa cells are polygonal in ten species and irregular in two species. Micromorphological characters of seeds are useful in specific and subspecific delimitations of Iranian Veronica.

Azolla microphylla Kaulf. (Salviniaceae): A new pteridophytic record for Bangladesh

2019-12-23T16:14:31+00:00

Not available.