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Articles 5911 - 5940 of 10757

Full-Text Articles in Botany

Callus Development And Indirect Shoot Regeneration From Seedling Explants Of Sugar Beet ( Beta Vulgarisl.) Cultured In Vitro, Songül Gürel, Ekrem Gürel, Zeki̇ Kaya Jan 2001

Callus Development And Indirect Shoot Regeneration From Seedling Explants Of Sugar Beet ( Beta Vulgarisl.) Cultured In Vitro, Songül Gürel, Ekrem Gürel, Zeki̇ Kaya

Turkish Journal of Botany

For callus production, hypocotyl, cotyledon, petiole and leaf explants from seedlings of different sugar beet ( Beta vulgaris L.) breeding lines were cultured on MS medium containing BAP or KIN in combination with NAA or 2,4-D at 0.0, 0.5 or 1.0 mg/l. The use of both auxins in combination with 0.5 mg/l BAP or 0.5 mg/l KIN resulted in greater amounts of callus from all types of explants. However, hypocotyl and cotyledon explants produced significantly more callus than petiole and leaf explants when the means of all lines were taken into account. Two types of callus were usually obtained, white …

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New Floristic Records For The Grid Square B3 Uluborlu - Isparta, Turkey, Gönül Kaynak, Gül Tarimcilar Jan 2001

New Floristic Records For The Grid Square B3 Uluborlu - Isparta, Turkey, Gönül Kaynak, Gül Tarimcilar

Turkish Journal of Botany

No abstract provided.

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The Genus Striga (Scrophulariaceae) In Africa, Kamal I. Mohamed, Lytton John Musselman, Charles R. Riches Jan 2001

The Genus Striga (Scrophulariaceae) In Africa, Kamal I. Mohamed, Lytton John Musselman, Charles R. Riches

Biological Sciences Faculty Publications

Twenty-eight species and six subspecies of the hemiparasitic genus Striga Lour., witchweed, occur in Africa. Twenty-two species are endemic. Witchweeds occur throughout the continent with greatest diversity in the grasslands and savannas north of the equator. Striga gesnerioides (Willd.) Vatke and S. hermonthica (Del.) Benth. have developed host-specific strains that may have distinct morphotypes. me accord these no formal taxonomic status. Striga hermonthica and S. asiatica (L.) Kuntze, limited to agroecosystems, may be recently derived from non-ruderal species. Striga hirsuta Benth. and S. lutea Lour., sometimes treated as conspecific with S. asiatica, are recognized as distinct species restricted …

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The Origin Of The 'Wild Orchards' Of Central Anatolia, Henk Woldring, Rene Cappers Jan 2001

The Origin Of The 'Wild Orchards' Of Central Anatolia, Henk Woldring, Rene Cappers

Turkish Journal of Botany

Palynological investigations have revealed that the deforestation of Central Anatolia started c. 4000 BP. At present, most of the land is cultivated and only small patches of woodland occur in remote mountain areas. These woodlands are dominated by deciduous oaks ( Quercus L. spp.) or locally by junipers ( Juniperus L. spp.). A pattern of scattered fruit trees, the so-called wild orchards, characterizes the cultivated fields. Another type of arboreal vegetation is found on isolated rock outcrops in the fields. Surveys of the vegetation types show that oaks are uncommon among the fields and on the rock outcrops. By contrast, …

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Periodical Effect Of Cement Dust Pollution On The Growth Of Some Plant Species, Muhammad Zafar Iqbal, Muhammad Shafiq Jan 2001

Periodical Effect Of Cement Dust Pollution On The Growth Of Some Plant Species, Muhammad Zafar Iqbal, Muhammad Shafiq

Turkish Journal of Botany

A significant reduction in plant cover, height and number of leaves for Carissa carandas L. was observed. Azadirachta indica(L.) A.Juss. showed no significant changes in plant cover and height with the exception of number of leaves. A. indicashowed a significant (p

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Pollen Flora Of Pakistan - Xxvi. Balsaminaceae, Anjum Perveen, Mohammad Qaiser Jan 2001

Pollen Flora Of Pakistan - Xxvi. Balsaminaceae, Anjum Perveen, Mohammad Qaiser

Turkish Journal of Botany

The pollen morphology of 8 species belonging to a single genus, i.e., Impatiens L., of the family Balsaminaceae, was studied by light microscope and scanning microscope. It is stenopalynous in nature. Pollen grains oblate to sub-oblate, rectangular, tetra-colpate, colpi very short (brevicolpate). Tectum reticulate. Palynology of the family confirms its monotypic status.

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Pollen Flora Of Pakistan - Xxviii: Resedaceae, Anjum Perveen, Mohammad Qaiser Jan 2001

Pollen Flora Of Pakistan - Xxviii: Resedaceae, Anjum Perveen, Mohammad Qaiser

Turkish Journal of Botany

The pollen morphology of 4 species belonging to the 3 genera of the family Resedaceae was investigated using a light microscope and scanning microscope. Pollen grains usually radially symmetrical, isopolar, sub-prolate, rarely prolates pheroidal, tricolpate or tricolporate. Tectum reticulate. However, apertural type and pollen shape are the most significant pollen characters for delimiting the genera. On the basis of apertural types 2 distinct pollen types are recognized, namely, I: Tricolpate-type and II: Tricolporate-type.

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Using The Green Flagellate Euglena Gracilis Klebs As Physiological Dosimeter: Is A Long-Term Bioassay More Significant Than A Short-Term One?, Roman A. Danilov, Nils C. A. Ekelund Jan 2001

Using The Green Flagellate Euglena Gracilis Klebs As Physiological Dosimeter: Is A Long-Term Bioassay More Significant Than A Short-Term One?, Roman A. Danilov, Nils C. A. Ekelund

Turkish Journal of Botany

The use of short-term tests with E. gracilis Klebs in order to assess toxicity cannot be viewed as absolutely preferable. At least in the case with wastewater from the pulp and paper industry, 7 day-tests could lead to more explanatory and significant results.

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The Clypeate Pollen Grains Of Turkish Iris L. (Iridaceae): Subgenus Scorpiris Sach, Emel Oybak Dönmez, Münevver Pinar Jan 2001

The Clypeate Pollen Grains Of Turkish Iris L. (Iridaceae): Subgenus Scorpiris Sach, Emel Oybak Dönmez, Münevver Pinar

Turkish Journal of Botany

The clypeate pollen grains of some species of Turkish Iris L. (Iridaceae) taxa belonging to the subgenus Scorpiris Spach have been investigated. Attention is given to characteristics of exine sculpturing and the exine shields using light microscopy and scanning electron microscopy. The pollen grains of the Scorpiris are shown to be uniform, especially with regard to pollen shape and exine sculpturing. However, a trend towards greater pollen size accompanied by higher exine shield number is noted from the less specialised taxa to the more specialised taxa. It is also considered that the clypeate pollen type is unique to subgenus Scorpiris …

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Floristical Characteristics Of Berit Dağı (Kahramanmaraş), Bayram Yildiz Jan 2001

Floristical Characteristics Of Berit Dağı (Kahramanmaraş), Bayram Yildiz

Turkish Journal of Botany

In this article, the floristical characteristics of Berit Dağı (Berit Mountain) are given and the vascular plant species growing there are documented. Berit Dağı is situated in the north-west of Kahramanmaraş province and at the south of Anatolian diagonal. It is in the transitional zone of the Irano-Turanian and Mediterranean phytogeographical regions. The research was carried out between 1977 and 1981. Approximately 2500 plant specimens were collected from the area. At the end of the study, 1132 vascular plant species (1165 taxa) belonging to 97 families and 462 genera were identified. Of these, 200 (17.6%) species are endemic to Turkey. …

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A New Species Of Ribes L. (Grossulariaceae) From East Anatolia, Turkey, Lütfi̇ Behçet Jan 2001

A New Species Of Ribes L. (Grossulariaceae) From East Anatolia, Turkey, Lütfi̇ Behçet

Turkish Journal of Botany

Ribes anatolica Behçet is described and illustrated as a new species (Grossulariaceae) from East Anatolia, Turkey.

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A New Record From Turkey: Ranunculus Bulbilliferus Boiss. Et Hoh., Lütfi̇ Behçet Jan 2001

A New Record From Turkey: Ranunculus Bulbilliferus Boiss. Et Hoh., Lütfi̇ Behçet

Turkish Journal of Botany

Ranunculus bulbilliferus Boiss. & Hoh. (Ranunculaceae) is recorded for the first time (B9 Van) for the flora of Turkey.

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The Effects Of Different Mineral Nutrients On The Levels Of Cytokinins In Maize (Zea Mays L.), Peyami̇ Battal, Beki̇r Ti̇lekli̇oğlu Jan 2001

The Effects Of Different Mineral Nutrients On The Levels Of Cytokinins In Maize (Zea Mays L.), Peyami̇ Battal, Beki̇r Ti̇lekli̇oğlu

Turkish Journal of Botany

In this study, Z (trans-Zeatin) and ZR (trans-Zeatin Riboside) levels in the roots, stems, leaves, flowers and fruits of maize plants (Zea mays L.) were determined using high performance liquid chromatography (HPLC). Plants were grown in media containing macro elements (nitrogen, phosphorus, potassium, calcium, magnesium, sulphur and iron) in optimum, deficient and excess concentrations. According to the average Z values for all periods, the highest Z levels were determined in the roots of plants treated with excessive P (-P); in stems, female flowers treated with excessive K (-K) and in leaves and kernels treated with excessive Ca (-Ca). The highest …

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A Description Of The Vegetation Mosaic Of The Forests Of Yirce And Muratdere (Bilecik-Bursa, Turkey) By Satellite Remote Sensing, Cengi̇z Türe Jan 2001

A Description Of The Vegetation Mosaic Of The Forests Of Yirce And Muratdere (Bilecik-Bursa, Turkey) By Satellite Remote Sensing, Cengi̇z Türe

Turkish Journal of Botany

The aim of this study is to describe the cut-off borders and the structure of vegetation mosaics of existing plant communities in the area, using traditional flora and vegetation methods and satellite remote sensing (Landsat satellite pictures and Geographical Information System (GIS) data). The results indicate that Pinus nigra L. subsp. pallasiana (Lamb.) Holmboe and Fagus orientalis Lipsky plant communities together with Quercus pubescens Willd. and Quercus cerris L. var. cerris could be differentiated. The coverage rates of dominant plant communities in the research area were as follows: Fagus orientalis (92%), Pinus nigra subsp. pallasiana (73%), Quercus pubescens and Quercus …

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A Study On The Autecology Of Reseda Lutea L. (Resedaceae) Distributed In Western Anatolia, Yunus Doğan Jan 2001

A Study On The Autecology Of Reseda Lutea L. (Resedaceae) Distributed In Western Anatolia, Yunus Doğan

Turkish Journal of Botany

The aim of this study was to determine the autecological characteristics of Reseda lutea L. (Resedaceae) distributed in Western Anatolia. The chemical and physical analysis was carried out on soil and plant samples collected from 54 different localities in Western Anatolia. The results show that the plant generally prefers sandy-loam and sandy-clayey-loam textural soils, with a slightly alkaline or medium alkaline pH. They prefer non-saline, calcareous soils which are poor in potassium and phosphorus, but the nitrogen content of the soils was found to vary greatly. The soil and plant analysis results were evaluated statistically and correlations were established.

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New Floristic Records On Dicotyledones For The Square B9 (Özalp-Van) From Turkey, Fevzi̇ Özgökçe Jan 2001

New Floristic Records On Dicotyledones For The Square B9 (Özalp-Van) From Turkey, Fevzi̇ Özgökçe

Turkish Journal of Botany

No abstract provided.

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Insertion Of An Antimicrobial Gene Into Agrobacterium And Its Further Use In Transforming Tobacco, Ekrem Gürel Jan 2001

Insertion Of An Antimicrobial Gene Into Agrobacterium And Its Further Use In Transforming Tobacco, Ekrem Gürel

Turkish Journal of Botany

In the present work, we first describe the transfer of a novel gene, designated 5W, into the LBA4404 Agrobacterium tumefaciens strain using pPCV91 plasmid through a triparental mating system. The 5W gene was recently isolated from macadamia, a native nut tree species of Australia, and has been shown to have an antimicrobial effect against certain fungi in vitro. Secondly, this gene was tranferred into tobacco (Nicotiana tabacum cv. Xhantii) using leaf explants to develop a system which could then be used for transferring this antimicrobial peptide into sunflower cultivars.

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Epipelic And Epilithic Algae Of Dağbaşı Lake (Rize-Turkey), Bülent Şahi̇n Jan 2001

Epipelic And Epilithic Algae Of Dağbaşı Lake (Rize-Turkey), Bülent Şahi̇n

Turkish Journal of Botany

Epipelic and epilithic algae of Dağbaşı lake were studied qualitatively between June and September 1988. The algal flora was found to consist of 103 species, 53 belonging to Bacillariophyta, 31 to Chlorophyta, 15 to Cyanophyta and 4 to Euglenophyta.

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Testig Growth Of Elodea Nuttallii (Palnch.) H. St. John With Different Culture Media, Hani̇fe Özbay Jan 2001

Testig Growth Of Elodea Nuttallii (Palnch.) H. St. John With Different Culture Media, Hani̇fe Özbay

Turkish Journal of Botany

The Growth rate of Elodea nuttallii (Planch.) H.St.John was tested in different culture media. Effects of snail was also determined on the growth rate of the plant. E. nuttallii grew well in the canal sediment medium. It also grew well in Steinberg Solution No 1, but not in Steinberg Solution No 2 and JIC:sand media. Overall the snail treatment did not significantly affect the growth rate of E. nuttallii in all tested growth media.

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Three New Records For The Marine Algal Flora Of Turkey, Ergün Taşkin, Mehmet Öztürk, Oğuz Kurt, Veysel Aysel Jan 2001

Three New Records For The Marine Algal Flora Of Turkey, Ergün Taşkin, Mehmet Öztürk, Oğuz Kurt, Veysel Aysel

Turkish Journal of Botany

In this study, three Cyanophyceae species new for Turkey are reported. These specimens are Oscillatoria bonnemaisonii (P.Crouan & H.Crouan) P.Crouan & H.Crouan, Microcoleus chthonoplastes Thuret (Oscillatoriales) and Dichothrix spiralis Fritsch (Nostocales). They were determined to be epiphytic on the other algae which were found at the upper-infralittoral zone of the bay of İskenderun (Mediterranean Sea, Turkey).

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New Hieracium L. (Asteraceae) Records For The Flora Of Turkey, Kami̇l Coşkunçelebi̇, Osman Beyazoğlu Jan 2001

New Hieracium L. (Asteraceae) Records For The Flora Of Turkey, Kami̇l Coşkunçelebi̇, Osman Beyazoğlu

Turkish Journal of Botany

Two Hieracium L. (Asteraceae) species from the NE Anatolia are described as a new records for the Flora of Turkey.

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The Bryophyta Flora Of Giresun Province Centre And Near Vicinity, Turan Özdemi̇r Jan 2001

The Bryophyta Flora Of Giresun Province Centre And Near Vicinity, Turan Özdemi̇r

Turkish Journal of Botany

In this study, 73 taxa were identified by the author. These belong to 28 families and 47 genera of Bryophyta. Of these, 13 taxa (Pogonatum nanum P.Beauv., Encalypta alpina Sm., Tortula norvegica (Web.) Wohl. & Lind., Barbula vinealis Brid., Gymnostomum calcareum Nees & Hornsch., Grimmia donniana Sw., Bryum gemmiparum De Not., Epipterygium tozeri (Grev.) Lind., Pterogonium gracile (Hedw.) Sm., Homalia trichomanoides (Hedw.) B.S.&G., Cratoneuron commutatum (Hedw.) Roth., Scorpiurium circinatum (Brid.) Fleisch. & Loeske, Eurhynchium praelongum var. rigidum Boul.) are new for the A4 grid-square adopted by Henderson & Prentice (1961). In addition, 20 taxa are new records for Giresun province.

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The Flora Of The Mount Kısır (Kars And Ardahan) And Nearest Environs, Hayretti̇n Ocakverdi̇ Jan 2001

The Flora Of The Mount Kısır (Kars And Ardahan) And Nearest Environs, Hayretti̇n Ocakverdi̇

Turkish Journal of Botany

Mount Kısır constitutes the study area; the northern and western parts are within the boundary of the Çıldır district (Ardahan), the southwestern part is within the boundary of Susuz and the eastern and southeastern parts are within the boundary of Arpacay (Kars). This place is the highest part of Northeastern Anatolia (3150 m) and lies within square A9. On Mount Kısır and in its environs, a continental climate prevails. In accordance with the climate, basaltic and chestnut brown soil prevails in the region. The study was carried out in the region in suitable periods between 1996 and 1999. During the …

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The Vegetation Of Çimen Mountain (Kahramanmaraş), Ömer Varol, Adem Tatli Jan 2001

The Vegetation Of Çimen Mountain (Kahramanmaraş), Ömer Varol, Adem Tatli

Turkish Journal of Botany

This investigation was carried out between 1995 and 1996 in order to research the vegetation of Çimen Mountain (Kahramanmaraş). The research area is situated at about 20 km to the south-west of Kahramanmaraş. Vegetation studies were carried out according to the Braun-Blanquet method. The authors determined 10 plant associations, all of which are new syntaxa to science, in three different vegetation types. Vegetation tables are given in an appendix.

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Determination Of The Nutrition Contents Of The Wild Plants Used As Vegetables In Upper Çoruh Valley, Ertan Yildirim, Ati̇lla Dursun, Meti̇n Turan Jan 2001

Determination Of The Nutrition Contents Of The Wild Plants Used As Vegetables In Upper Çoruh Valley, Ertan Yildirim, Ati̇lla Dursun, Meti̇n Turan

Turkish Journal of Botany

This study was undertaken in order to investigate wild plant species locally consumed as food in Upper Çoruh Valley. The plant species were collected in the late winter and spring, and their taxonomic identifications were made. The plants identified were Plantago minor L., Polygonum bistorta L., Astrodaucus orientalis L., Camelina rumelica Boehm., Lathyrus tuberosus L., Galium rotundifolium L., Chenopodium album L. and Chenopodium album L. Analyses were carried out to evaluate the nutritional values of the plant parts. The highest dry matter, ascorbic acid, nitrogen, protein, phosphorus and potassium contents were determined to be 20.87 g.100 g^{-1} , 161.25 mg.100 …

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A Study On The Past And Present Diatom Flora Of Two Alkaline Lakes, Sabri̇ Kilinç, Erdal Ridvan Sivaci Jan 2001

A Study On The Past And Present Diatom Flora Of Two Alkaline Lakes, Sabri̇ Kilinç, Erdal Ridvan Sivaci

Turkish Journal of Botany

The diatom flora of Lakes Hafik and Tödürge was studied qualitatively. Each lake was sampled monthly during two periods. The first period was between April 1986 and June 1987 in Lake Hafik and between August 1990 and October 1990 in Lake Tödürge. The second period was between December 1999 and July 2000 in both lakes. A total of 94 diatom taxa belonging to 25 genera and 53 diatom taxa belonging to 21 genera were identified in Lakes Hafik and Tödürge respectively. Cymbella Agardh, Navicula Bory and Nitzschia Hassall appeared to have the richest genera in terms of number of species …

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Contributions To The Macrofungi Flora Of Bitlis Province, Abdullah Kaya Jan 2001

Contributions To The Macrofungi Flora Of Bitlis Province, Abdullah Kaya

Turkish Journal of Botany

This study was carried out on macrofungi samples collected in Bitlis province between 1997 and 2000. As a result of field and laboratory studies, 60 species belonging to 17 families were identified. Four of them, Coprinus xanthotrix Romagn., Psathyrella atomata (Quél) Fr., Rhodocybe fallax (Quél) Sing. and Polyporus meridionalis (David) Jahn., are new records for Turkey.

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Pollen Flora Of Pakistan -Xxvii Nyctaginaceae, Anjum Perveen, Mohammad Qaiser Jan 2001

Pollen Flora Of Pakistan -Xxvii Nyctaginaceae, Anjum Perveen, Mohammad Qaiser

Turkish Journal of Botany

The pollen morphology of eight species belonging to two genera, i.e., Boerhavia L., and Commicarpus Standley, of the family Nyctaginaceae, was studied by light microscope and scanning microscope. The family has uniform pollen characters. Pollen grains mostly spheroidal, pantoporate, ± circular, pores small or large, non-operculate, pore plate ± scabrate-spinulose. Tectum tubuliferous spinulose.

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The Flora Of The Boyabat (Sinop) Dam And Its Environs, Hasan Korkmaz, Ali̇ Engi̇n Jan 2001

The Flora Of The Boyabat (Sinop) Dam And Its Environs, Hasan Korkmaz, Ali̇ Engi̇n

Turkish Journal of Botany

This study was carried out over three years, from 1990 to 1993. The study area is situated between Kepez gorge and Devrez stream of Kızılırmak valley. In the study area, 1016 species belonging to 441 genera and 99 families were identified. Distribution rates of the species in terms of phytogeographic regions are as follows: 12.40% Euro-Siberian, 3.83% Euxine, 0.68% Hyrcano-Euxine, 11.31% Irano-Turanian and 9.74% Mediterranean. The number of endemic species is 106 and the rate of endemism is 10.43%.

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New And Poorly Known Genera Of Microfungi For Turkey, Elşad Hüseyi̇n, Faruk Selçuk Jan 2001

New And Poorly Known Genera Of Microfungi For Turkey, Elşad Hüseyi̇n, Faruk Selçuk

Turkish Journal of Botany

The genus Kabatia Bubâk and species K. mirabilis Bubâk var. oblongifoliae Conners are new records for Turkey. The genus Lasiobotrys Kunze and species L. lonicerae (Fr.) Kunze on a new host plant (Lonicera caucasica Pallas) are poorly known in Turkey and are a new record for the Black Sea coast.

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