Open Access. Powered by Scholars. Published by Universities.®

Botany Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 30 of 68

Full-Text Articles in Botany

Genetic Control Of Self-Incompatibility In Centromadia (Hemizonia) Pungens Subsp. Laevis (Madiinae, Asteraceae), Elizabeth A. Friar, Tasha Ladoux Jan 2002

Genetic Control Of Self-Incompatibility In Centromadia (Hemizonia) Pungens Subsp. Laevis (Madiinae, Asteraceae), Elizabeth A. Friar, Tasha Ladoux

Aliso: A Journal of Systematic and Floristic Botany

The presence of self-incompatibility was tested in Centromadia pun gens subsp. laevis and the genetic basis of the self-incompatibility response was explored using crossing studies. We performed full diallel crossing experiments among 10 individuals from one natural population and four F1 families. We observed a strong self-incompatibility response in all individuals tested, with a significant difference in seed set between selfed and outcrossed matings. Most pairwise matings among parental plants were compatible, with some nonreciprocally incompatible matings (i.e., the matings were successful in one direction, but not the other), and only one reciprocally incompatible mating. The full diallel crossing …


The Chromosome Number Of Schaffnerella Gracilis (Gramineae, Chloridoideae), J. Travis Columbus, Nancy F. Refulio-Rodriguez Jan 2002

The Chromosome Number Of Schaffnerella Gracilis (Gramineae, Chloridoideae), J. Travis Columbus, Nancy F. Refulio-Rodriguez

Aliso: A Journal of Systematic and Floristic Botany

The first ever chromosome report for the monotypic genus Schaffnerella (Grarnineae, Chloridoideae) is 2n = 20 (10 II) from pollen parent cells at diakinesis, which indicates diploidy and a base number of 10. The close relative Lycurus likewise has x = 10, but is tetraploid (2n = 4x = 40).


Contents 21(2) Jan 2002

Contents 21(2)

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.


Checklist Of The Pteridophytes Of Aguascalientes, Mexico, María Elena Siqueiros-Delgado, Gabriel González-Adame Jan 2002

Checklist Of The Pteridophytes Of Aguascalientes, Mexico, María Elena Siqueiros-Delgado, Gabriel González-Adame

Aliso: A Journal of Systematic and Floristic Botany

Ferns and fern allies from Agu ascalientes, Mexico were s tudied. Fifty-five localities distributed in all municipios of the state were surveyed. Seventy-seven taxa were found: seventy species of ferns, five species of Selaginell, one species of Equisetum, and one species of Isoëtes. Forty taxa are new records for Aguascalientes. Among the ferns, Cheilanthes and Polypodium are the most diverse and abundant genera, usually occurring in xerophytic associations or dry forests. Selaginella is also common in Aguascalientes, and inhabits rocky cliffs in dry environments. Equisetum and lsoëtes are restricted to marshy places.


Developmental Failure And Loss Of Reproductive Capacity As A Factor In Extinction: A Nine-Year Study Of Dedeckera Eurekensis (Polygonaceae), Delbert Wiens, Loreen Allphin, Donald H. Mansfield, Glenn Thackray Jan 2002

Developmental Failure And Loss Of Reproductive Capacity As A Factor In Extinction: A Nine-Year Study Of Dedeckera Eurekensis (Polygonaceae), Delbert Wiens, Loreen Allphin, Donald H. Mansfield, Glenn Thackray

Aliso: A Journal of Systematic and Floristic Botany

Many long-lived perennial species exhibit lowered reproductive capacity. Early studies of reproductive success in Dedeckera eurekensis (Polygonaceae) demonstrated that the species exhibited extremely low reproductive success, low seed/ovule (S/O) ratios (i.e., the percentage of ovules that produce filled seeds; 2.5 %), low germinability of filled seeds (3.5%), low seedling survivorship (11 .1%), and lack of recruitment in natural populations. These results were attributed to genetic load, but this elicited controversy, prompting long-term studies of the relationship between the S/O ratio and environment. After nine years of monitoring, however, the S/O ratio had not changed significantly (2 .7%), and there was …


The History Of The Discovery And Initial Seed Dissemination Of Metasequoia Glyptostroboides, A "Living Fossil", Jinshuang Ma Jan 2002

The History Of The Discovery And Initial Seed Dissemination Of Metasequoia Glyptostroboides, A "Living Fossil", Jinshuang Ma

Aliso: A Journal of Systematic and Floristic Botany

Ever since the "living fossil ", Metasequoia glyptostroboides, was discovered during the 1940s in China, accounts of its mysterious discovery and introduction throughout the world have been told many times in different languages. However, information has often departed considerably from the true story. This paper represents a synthesis of more than 1000 original letters, manuscripts and publications both in Chinese and other languages, and addresses two main questions about details of the story: (1) how was the living fossil really discovered , and (2) who introduced the seeds into the U.S.A. and the rest of the world? Several controversies surrounding …


Letter From The Dean, Gregory J. Weidemann Jan 2002

Letter From The Dean, Gregory J. Weidemann

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.


Instructions For Authors, Discovery Editors Jan 2002

Instructions For Authors, Discovery Editors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.


Wood And Bark Anatomy Of Myricaceae: Relationships, Generic Definitions, And Ecological Interpretations, Sherwin Carlquist Jan 2002

Wood And Bark Anatomy Of Myricaceae: Relationships, Generic Definitions, And Ecological Interpretations, Sherwin Carlquist

Aliso: A Journal of Systematic and Floristic Botany

Wood anatomy of the single species of Canacomyrica (hitherto not studied) shows that it belongs in Myricaceae, although it differs from other genera in several respects (axial parenchyma grouped in bands or columns as well as diffuse; Heterogeneous Type I rays; more numerous bars per perforation plate). The latter two features are primitive for the family. The four genera (Canacomyrica. Comptonia, Morella, and Myrica s.s.) differ from each other not only by qualitative features but by quantitative features (feature means in genera mostly non- overl apping). Wood of Comptonia and Myri ca s.s. lacks chambered crystals in axial parenchyma and …


New Species Of Phoradendron (Viscaceae) From Mexico And Guatemala And A Synopsis Of Species In Section Pauciflorae, Delbert Wiens, Frank Hawksworth Jan 2002

New Species Of Phoradendron (Viscaceae) From Mexico And Guatemala And A Synopsis Of Species In Section Pauciflorae, Delbert Wiens, Frank Hawksworth

Aliso: A Journal of Systematic and Floristic Botany

As presently interpreted Phoradendron section Paucifiorae consists of 15 species. These mistletoes parasitize primarily conifers. We describe seven new species, make status changes for four species, and provide information on the hosts and distribution of all members of the section. New species described are: Phoradendron abietinurn Wiens, on Abies durangensi s in Chihuahua, Durango, and Jalisco, Mexico; P. acuminatum Wiens, on Cupressus lusitanica in Guatemala; P. flavomarginatum Wiens, on Juniperus fiaccida in Nuevo León, Mexico; P. lta wksworthii Wiens, on Juniperus in New Mexico, west Texas, and Coahuila, Mexico; P. olivae Wiens, on Cupressus lusitanica in Colima and Jalisco, Mexico; …


Native Plants: The Preservation And Restoration Of Native Plants In Designed Landscapes In Northwest Arkansas, Janet Coleman Jan 2002

Native Plants: The Preservation And Restoration Of Native Plants In Designed Landscapes In Northwest Arkansas, Janet Coleman

Inquiry: The University of Arkansas Undergraduate Research Journal

A decline in Northwest Arkansas's native plant population has occurred over the past 50 years, as documented by the U.S. Forest Service in the Ozark-Ouachita Highlands Assessment. This decline has been caused by increased human development in natural areas and the replacement of native plants with exotic, non-native plants. As a result, a generation has grown up not knowing what an Ozark wake Robin trillium (Trillium pusillum var. ozarkanum) or Blood root (Sanguinaria canadensis) Look like, because these plants are difficult to find in nature, are not commonly grown in designed landscapes, and are Largely unavailable in garden centers. The …


Changes In Abscisic Acid And Indole-3-Acetic Acid Concentrations In Funalia Trogii (Berk.) Bondartsev & Singer And Phanerochaete Chrysosporium Burds. Me446 Subjected To Salt Stress, Serpi̇l Ünyayar Jan 2002

Changes In Abscisic Acid And Indole-3-Acetic Acid Concentrations In Funalia Trogii (Berk.) Bondartsev & Singer And Phanerochaete Chrysosporium Burds. Me446 Subjected To Salt Stress, Serpi̇l Ünyayar

Turkish Journal of Botany

Variations in abscisic acid (ABA) and indole-3-acetic acid (IAA) concentrations were studied in Funalia trogii (Berk.) Bondartsev & Singer and Phanerochaete chrysosporium Burds. ME446 subjected to salt stress. The levels of ABA and IAA were determined by gas chromatography (GC) and UV-VIS spectrophotometry. The levels of hormones vary in the regulation of growth and in response to stress. It was found that ABA concentrations were higher in the salt stressed groups than in the control groups, whereas IAA concentrations were lower. These results show that, in fungi, ABA concentrations are positively and IAA concentrations negatively correlated with salt stress.


Auxin (Indole-3-Acetic Acid), Gibberellic Acid (Ga_3), Abscisic Acid (Aba) And Cytokinin (Zeatin) Production By Some Species Of Mosses And Lichens, Nuray Ergün, Şaban Fati̇h Topcuoğlu, Ati̇lla Yildiz Jan 2002

Auxin (Indole-3-Acetic Acid), Gibberellic Acid (Ga_3), Abscisic Acid (Aba) And Cytokinin (Zeatin) Production By Some Species Of Mosses And Lichens, Nuray Ergün, Şaban Fati̇h Topcuoğlu, Ati̇lla Yildiz

Turkish Journal of Botany

In this study, the levels of endogenous free, bound and total auxin (Indole-3-acetic acid, IAA), gibberellic acid (GA_3), abscisic acid (ABA) and cytokinin (zeatin) were examined in some species of mosses and lichens. For determination of the levels of these plant growth regulators, spectrophotometry was used. Our findings show that the mosses and lichens used in this study produce the plant growth regulators IAA, GA_3, ABA and zeatin.


Seasonal Variations In The Biomass Of Macro-Algal Communities From The Gulf Of Antalya (North-Eastern Mediterranean), İsmai̇l İbrahi̇m Turna, Ö. Osman Ertan, Mario Cormaci, Giovanni Furnari Jan 2002

Seasonal Variations In The Biomass Of Macro-Algal Communities From The Gulf Of Antalya (North-Eastern Mediterranean), İsmai̇l İbrahi̇m Turna, Ö. Osman Ertan, Mario Cormaci, Giovanni Furnari

Turkish Journal of Botany

In this study, the seasonal variations in the macro-algal biomass in the Gulf of Antalya (north-eastern Mediterranean) were investigated. The seasonal variations of the macro-algal biomass were found to be related to the biology of the abundant species during less favourable seasons. These variations occurred usually as a result of a significant reduction in algal density [Padina pavonica (L.) J.V.Lamour., Dasycladus vermicularis (Scopoli) Krasser, Chondrophycus papillosus (C.Agardh) Garbay & Harper] or loss of major part of their thallus [Cystoseira spp., Liagora distenta (Mertens ex Roth) J.V.Lamour., Liagora viscida (Forssk.) C.Agardh]. The highest values of biomass were found to be in …


A Contribution To The Bryophyte Flora Of Western Turkey: The Bryophyte Flora Of Madran Mountain And The Çine Valley (Aydın, Turkey), Adnan Erdağ Jan 2002

A Contribution To The Bryophyte Flora Of Western Turkey: The Bryophyte Flora Of Madran Mountain And The Çine Valley (Aydın, Turkey), Adnan Erdağ

Turkish Journal of Botany

This study presents a survey on the bryophyte flora of Madran mountain and Çine valley (Aydın, Turkey). One hundred and thirty-three bryophyte species belonging to 35 families and 69 genera were recorded from the area. Phaeoceros laevis (L.) Prosk. is the only member of the hornworts while liverworts are represented by 15 species. The remaining 117 taxa belong to the Bryopsida. Thirty-five species are new records for square C11 according to Henderson's (1961) grid system.


\Alpha -Difluoromethylornithine Inhibits The Growth Of Fungus Macrophomina Phaseoli, Narçin Palavan Ünsal, Ayşin Çotuk, Yeşi̇m Kalaç Martini Jan 2002

\Alpha -Difluoromethylornithine Inhibits The Growth Of Fungus Macrophomina Phaseoli, Narçin Palavan Ünsal, Ayşin Çotuk, Yeşi̇m Kalaç Martini

Turkish Journal of Botany

\alpha -Difluoromethylornithine (DFMO), a specific enzyme activated inhibitor of ornithine decarboxylase (ODC), significantly inhibited the mycelial growth of the fungus Macrophomina phaseoli (Tassi) Goidanich. Putrescine (Put), when added to the nutrient medium at a concentration of 0.25 mM, decreased the inhibitory effect of DFMO. These results suggest that polyamines (PAs) are essential for the growth of fungi and that DFMO is applicable to the alleviation or prevention of crop losses due to phytopathogenic fungi.


Two New Alchemilla L. (Rosaceae) Records For The Flora Of Turkey, Sema Hayirlioğlu Ayaz, Osman Beyazoğlu Jan 2002

Two New Alchemilla L. (Rosaceae) Records For The Flora Of Turkey, Sema Hayirlioğlu Ayaz, Osman Beyazoğlu

Turkish Journal of Botany

Two Alchemilla L. (Rosaceae) species from north-east Anatolia are described as new records for Turkey.


Plant Biotechnology I, Tissue Culture And Its Applications, Kemal Kazan Jan 2002

Plant Biotechnology I, Tissue Culture And Its Applications, Kemal Kazan

Turkish Journal of Botany

No abstract provided.


The Planktonic Diatoms Of Lake Çıldır (Ardahan-Turkey), Aydin Akbulut, Kazim Yildiz Jan 2002

The Planktonic Diatoms Of Lake Çıldır (Ardahan-Turkey), Aydin Akbulut, Kazim Yildiz

Turkish Journal of Botany

This paper describes the planktonic diatom flora of Lake Çıldır. Samples were collected monthly between May 1991 and September 1993 at three different stations. A total of 94 diatom taxa were identified. In the study period, the most dominant and abundant taxa were Cyclotella meneghiniana Kütz., Aulacoseria granulata (Ehrenb.) Simonsen, Melosira varians C.Agardh and Navicula Bory spp. The diatom flora of the lake is rich in species and varieties and is similar to that in other parts of Turkey.


Selected Chemical Constituents And Their Seasonal Variations In Flabellia Petiolata (Turra) Nizam. And Halimeda Tuna (Ellis & Sol.) J.V.Lamour. In The Gulf Of Antalya (North-Eastern Mediterranean), Şengül Bi̇lgi̇n, Ö. Osman Ertan Jan 2002

Selected Chemical Constituents And Their Seasonal Variations In Flabellia Petiolata (Turra) Nizam. And Halimeda Tuna (Ellis & Sol.) J.V.Lamour. In The Gulf Of Antalya (North-Eastern Mediterranean), Şengül Bi̇lgi̇n, Ö. Osman Ertan

Turkish Journal of Botany

Seasonal changes in selected chemical, ecological and morphological characteristics of Flabellia petiolata (Turra) Nizam. and Halimeda tuna (Ellis & Sol.) J.V.Lamour., which are commonly found in the Gulf of Antalya, were studied. Crude protein content of F. petiolata was found to be higher than that of H. tuna, whereas the crude fat contents of the two species were similar. On the other hand, compared to F. petiolata, H. tuna was rich in inorganic material. Both species were observed to be dense on a seasonal basis in the sampling area and they reached their maximum length during summer.


A New Record For The Myxomycetes Flora Of Turkey: Comatricha Pulchella (C.Bab.) Rost. Var. Pulchella, C. Cem Ergül, Başaran Dülger Jan 2002

A New Record For The Myxomycetes Flora Of Turkey: Comatricha Pulchella (C.Bab.) Rost. Var. Pulchella, C. Cem Ergül, Başaran Dülger

Turkish Journal of Botany

Comatricha pulchella (C.Bab.) Rost. var. pulchella is recorded for the first time from Turkey.


A Note On Cheilothela Chloropus (Brid.) Lindb. (Ditrichaceae, Musci) In Turkey, Adnan Erdağ Jan 2002

A Note On Cheilothela Chloropus (Brid.) Lindb. (Ditrichaceae, Musci) In Turkey, Adnan Erdağ

Turkish Journal of Botany

Fruiting specimens of Cheilothela chloropus (Brid.) Lindb. were collected and illustrated for the first time from the southwest of Turkey. A description and the distribution of the species are given to provide a contribution for further studies on Turkish mosses.


The Flora And Vegetation Of Kunduz Forests (Vezirköprü / Samsun), Fazil Özen, Mahmut Kilinç Jan 2002

The Flora And Vegetation Of Kunduz Forests (Vezirköprü / Samsun), Fazil Özen, Mahmut Kilinç

Turkish Journal of Botany

The research area, Kunduz Forests, is located on Kunduz Mountain, which is about 35 km south-west of Vezirköprü (Samsun). This area is in the A5 square in the grid scheme of Davis and is in the Euxine sector of the Euro-Siberian floristic region phytogeographically. The distribution of 306 specific and infraspecific taxa forming the flora of the research area according to floristic regions is as follows: Euro-Siberian 28.43%, Mediterranean 11.44% and Irano-Turanian 4.90%. The percentage of taxa found in more than one floristic region is 55.23%. Twenty-five of the 306 taxa found in the study area are given as new …


Influence Of The Inorganic Carbon Addition On Photosynthesis Of Algae And Some Macrophytes, Meri̇ç Albay, Jan Pokorny Jan 2002

Influence Of The Inorganic Carbon Addition On Photosynthesis Of Algae And Some Macrophytes, Meri̇ç Albay, Jan Pokorny

Turkish Journal of Botany

A two-step experiment was conducted in order to understand whether natural algal communities (fish-pond water) and selected macrophytes (Potamogeton pectinatus L. Elodea nuttallii (Planch.). St.John. and Utricularia L. sp.) + algae were limited by lack of inorganic carbon (IC). First, 0.6 ml 1 M KHCO_3- was added to the water of Vajgar and Ratmirovsky ponds, South Bohemia, and incubated for 180 minutes under 125 µE m^{-2} s^{-1} light. Then light intensity was increased to 150 µE m^{-2} s^{-1} and 0.6 ml 1 M KHCO_3- was added to selected macrophytes + Vajgar pond waters and incubated for 50 and 180 minutes. …


A New Record For The Flora Of Turkey: Physalis Philadelphica Lam. Var. Immaculata Waterf. (Solanaceae), Beki̇r Bükün, F. Nezi̇hi̇ Uygur, Si̇bel Uygur, Necaatti̇n Türkmen, Atabay Düzenli̇ Jan 2002

A New Record For The Flora Of Turkey: Physalis Philadelphica Lam. Var. Immaculata Waterf. (Solanaceae), Beki̇r Bükün, F. Nezi̇hi̇ Uygur, Si̇bel Uygur, Necaatti̇n Türkmen, Atabay Düzenli̇

Turkish Journal of Botany

A new species, Physalis philadelphica Lam. var. immaculata Waterf. (Solanaceae) is reported for the first time for the flora of Turkey


New Records Of The Genus Histioneis F.R. Von Stein (Dinophyceae) From Turkish Coastal Waters, Sevi̇m Polat, Tufan Koray Jan 2002

New Records Of The Genus Histioneis F.R. Von Stein (Dinophyceae) From Turkish Coastal Waters, Sevi̇m Polat, Tufan Koray

Turkish Journal of Botany

The dinoflagellate genus Histioneis F.R. von Stein 1883 and six species belonging to this genus are reported for the first time from the coastal waters of Turkey (north-eastern Mediterranean, lat. 36° 06' N - 36° 07' N, long. 33° 28' E - 33°30' E). Descriptions of the species Histioneis depressa J.Schiller, H. expansa L.Rampi, H. para Murray & Whitting, H. marchesonii L.Rampi, H. striata Kof. & J.R.Michener and H. elongata Kof. & J.R.Michener are given.


A New Generic Records For Turkey, Lütfi̇ Behçet, Murat Ünal Jan 2002

A New Generic Records For Turkey, Lütfi̇ Behçet, Murat Ünal

Turkish Journal of Botany

The monotypic Clastopus Bunge ex Boiss. (Cruciferae) is recorded for the first time from south-east Turkey. The diagnostic characters of C. vestitus (Desv.) Boiss. are described and its ecology and conservation discussed.


Flora Of Karagüney Mountain (Kırıkkale), Ali̇ Arslan Dönmez Jan 2002

Flora Of Karagüney Mountain (Kırıkkale), Ali̇ Arslan Dönmez

Turkish Journal of Botany

This paper deals with a floristic study of Karagüney Mountain (Kırıkkale/Turkey). The study was carried out during 1989-1991 and 2500 vascular plant samples were collected. Eight hundred and sixty-eight taxa of 378 genera have been identified. Fabaceae, Asteraceae and Poaceae are the largest families and Astragalus L., Silene L. and Salvia L. are the largest genera in the area. The endemism rate of the area is 13.1%. The classification of the taxa into three main chorological units shows that Irano-Turanian elements are predominant. Threatened categories were proposed for 109 taxa according to IUCN categories.


The Effects Of Gamma Irradiation On The Pollen Size Of Gossypium Hirsutum L., Çi̇ğdem Savaşkan Jan 2002

The Effects Of Gamma Irradiation On The Pollen Size Of Gossypium Hirsutum L., Çi̇ğdem Savaşkan

Turkish Journal of Botany

Gossypium hirsutum L. (cotton) is cultivated widely in the south of Turkey. In this study, seeds of the cotton cultivar Çukurova 1518 were irradiated with gamma at 50, 100, 200, 300 and 400 Gray doses in a Co^{60} source. The size of morphologically normal pollen grains was measured in generation M_1 and found to be 120.35 µm in the control group, while this value was different in the irradiated groups. However, there was no significant difference in the size of pollen grains of normal morphology and shape between the irradiated and control pollens.


A Study On The Epiphytic Algae Of The Nilüfer Stream (Bursa), Şükran Dere, Di̇dem Karacaoğlu, Nurhayat Dalkiran Jan 2002

A Study On The Epiphytic Algae Of The Nilüfer Stream (Bursa), Şükran Dere, Di̇dem Karacaoğlu, Nurhayat Dalkiran

Turkish Journal of Botany

In our study, water samples were taken monthly between August 1997 and June 1998 from six selected stations in the region, from the source of the Nilüfer stream to the point where it joins the Marmara Sea. Temperature (Cº), pH, total dissolved substance (TDS), conductivity (EC), dissolved oxygen (DO) and biochemical oxygen demand (BOD5) values of the samples were measured. The epiphytic algal flora, and the population density and the abundance degree of species were determined. In the community of epiphytic algae, members of Bacillariophyta were dominant and Encyonema minutum (Hilse ex Rabh.) D.G.Mann, (Cymbellaceae), Achnanthidium minutissimum (Kütz.) Czarn. (Achnanthaceae), …