scholarly journals ENHANCEMENT OF SHOOT REGENERATION BY PARACHLOROPHENOXY ISOBUTYRIC ACID (PCIB) IN LEAF CULTURES OF IPOMOEA SPECIES IN THE SECTION BATATAS.

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 696c-696
Author(s):  
Ruth S. Kobayashi ◽  
John C. Bouwkamp ◽  
Stephen L. Sinden
Keyword(s):  
Shoot Regeneration ◽  
Wild Species ◽  
Related Species ◽  
Fold Increase ◽  
Isobutyric Acid ◽  
The Other ◽  
Closely Related Species ◽  
Ipomoea Species ◽  
Regeneration Systems

Use of wild species for in vitro sweetpotato improvement has been limited, in part, by the lack of suitable regeneration systems for these species. Shoot regeneration in 4 closely related species, I. batatas, I. cordatotriloba, I. trifida and I. triloba, were evaluated. Callus was initiated using methods described by Otani and Shimada (1988). Calli were transferred to regeneration media containing 17.75 uM BAP and 0, 1, 10 and 100 uM PCIB. Organogenesis was enhanced by the presence of PCIB. With I. cordatotriloba calli grown on media with 10 uM PCIB, a 2-fold increase in the percentage of calli exhibiting shoot regeneration was observed as compared to calli grown on media with BAP alone. A significant increase in the average number of shoots per callus was also observed. The other species examined appeared to be less sensitive than I. cordatotriloba to the PCIB treatments.

Pimpinella ibradiensis (Apiaceae), an unusual new species from Turkey

Phytotaxa ◽  
2015 ◽  
Vol 217 (2) ◽  
pp. 164 ◽  
Author(s):  
İlker Çinbilgel ◽  
özkan Eren ◽  
Hayri Duman ◽  
Mustafa Gökceoğlu
Keyword(s):  
New Species ◽  
Geographical Distribution ◽  
Related Species ◽  
Conservation Status ◽  
Identification Key ◽  
The Other ◽  
Site Conditions ◽  
Closely Related Species

Pimpinella ibradiensis, an unusual new species found in the Toka Yayla (İbradı, Antalya) in southern Anatolia, is described and illustrated. Site conditions, synecology and conservation status of P. ibradiensis are considered. In light of the comparison with the other closely related four species, namely P. nephrophylla, P. flabellifolia, P. sintenisii and P. paucidentata, its similarity within the genus are discussed. P. ibradiensis is easly distinguished from its relatives by its white petals, presence of bracts and bracteoles, larger fruits (4–5.5 × 1–2 mm), and having serrulate basal leaves with 60–95 strongly cartilaginous teeth along margins. The geographical distribution of P. ibradiensis and closely related species are mapped and the identification key of those species is updated.

scholarly journals Albumin Enhances Caspofungin Activity against Aspergillus Species by Facilitating Drug Delivery to Germinating Hyphae

2015 ◽  
Vol 60 (3) ◽  
pp. 1226-1233 ◽  
Author(s):  
Petros Ioannou ◽  
Aggeliki Andrianaki ◽  
Tonia Akoumianaki ◽  
Irene Kyrmizi ◽  
Nathaniel Albert ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Cell Culture ◽  
Antifungal Agents ◽  
Fold Increase ◽  
Culture Conditions ◽  
The Other ◽  
Related Factors ◽  
Content Type

The modestin vitroactivity of echinocandins againstAspergillusimplies that host-related factors augment the action of these antifungal agentsin vivo. We found that, in contrast to the other antifungal agents (voriconazole, amphotericin B) tested, caspofungin exhibited a profound increase in activity against variousAspergillusspecies under conditions of cell culture growth, as evidenced by a ≥4-fold decrease in minimum effective concentrations (MECs) (P= 0. 0005). Importantly, the enhanced activity of caspofungin againstAspergillusspp. under cell culture conditions was strictly dependent on serum albumin and was not observed with the other two echinocandins, micafungin and anidulafungin. Of interest, fluorescently labeled albumin bound preferentially on the surface of germinatingAspergillushyphae, and this interaction was further enhanced upon treatment with caspofungin. In addition, supplementation of cell culture medium with albumin resulted in a significant, 5-fold increase in association of fluorescently labeled caspofungin withAspergillushyphae (P< 0.0001). Collectively, we found a novel synergistic interaction between albumin and caspofungin, with albumin acting as a potential carrier molecule to facilitate antifungal drug delivery toAspergillushyphae.

scholarly journals Repeated evolution of asymmetric genitalia and right-sided mating behavior in theDrosophila nannopteraspecies group

2019 ◽  
Author(s):  
Andrea Acurio ◽  
Flor T. Rhebergen ◽  
Sarah Paulus ◽  
Virginie Courtier-Orgogozo ◽  
Michael Lang
Keyword(s):  
Related Species ◽  
Current Data ◽  
The Other ◽  
Genital Morphology ◽  
Closely Related Species ◽  
Outgroup Species ◽  
Repeated Evolution ◽  
Drosophila Pachea ◽  
Species Specific ◽  
Group Species

AbstractBackgroundMale genitals have repeatedly evolved left-right asymmetries, and the causes of such evolution remain unclear. TheDrosophila nannopteragroup contains four species, among which three exhibit left-right asymmetries of distinct genital organs. In the most studied species,Drosophila pachea, males display asymmetric genital lobes and they mate right-sided on top of the female. Copulation position of the other species is unknown.ResultsTo assess whether the evolution of genital asymmetry could be linked to the evolution of one-sided mating, we examined phallus morphology and copulation position inD. pacheaand closely related species. The phallus was found to be symmetric in all investigated species exceptD. pachea, which display an asymmetric phallus with a right-sided gonopore, andD. acanthoptera, which harbor an asymmetrically bent phallus. In all examined species, males were found to position themselves symmetrically on top of the female, except inD. pacheaandD. nannoptera, where males mated right-sided, in distinctive, species-specific positions. In addition, the copulation duration was found to be increased innannopteragroup species compared to closely related outgroup species.ConclusionOur study shows that gains, and possibly losses, of asymmetry in genital morphology and mating position have evolved repeatedly in thenannopteragroup. Current data does not allow us to conclude whether genital asymmetry has evolved in response to changes in mating position, or vice versa.

A giant Permian fusulinid from east-central Alaska with comparisons of all giant fusulinids in western North America

1995 ◽  
Vol 69 (5) ◽  
pp. 805-812 ◽  
Author(s):  
Calvin H. Stevens
Keyword(s):  
North America ◽  
Related Species ◽  
The Other ◽  
Lower Permian ◽  
Early Permian ◽  
Western North America ◽  
Closely Related Species ◽  
East Central ◽  
West Texas ◽  
Species Groups

The discovery of a new locality yielding giant Guadalupian (Lower Permian) fusulinids in east-central Alaska extends the range of these forms much farther north than previously known, and into a tectonostratigraphic terrane from which they previously had not been reported. The number of areas from which giant parafusulinids are known in North America is thus raised to eight. Three of these localities are in rocks that previously had been referred to the allochthonous McCloud belt arc, and one, West Texas, is known to have been part of Paleozoic North America. Comparison of species from all areas suggests that there are two closely related species groups: one represented in Texas and Coahuila, and the other represented in Sonora, northern California, northeastern Washington, southern and northern British Columbia, Alaska, and apparently in Texas. These groups may differ because they are of slightly different ages or because interchange between the faunas of Texas–Coahuila area and the other regions was somewhat inhibited during the Early Permian.

scholarly journals A New Species of Ligyrocoris Stal With a Key to the Northeastern Species (Hemiptera:Lygaeidae)

1963 ◽  
Vol 70 (1) ◽  
pp. 17-21
Author(s):  
Merrill H. Sweet
Keyword(s):  
New Species ◽  
Life Cycle ◽  
New England ◽  
Related Species ◽  
Habitat Preferences ◽  
Life Cycles ◽  
The Other ◽  
Closely Related Species ◽  
Carex Stricta ◽  
A New Species

In the course of current work upon the biology and ecology of the Rhyparochrominae of New England, a new species of Ligyrocoris was discovered. The species runs in Barber's (1921) key to the couplet separating diffusus (Uhler) from sylvestris (L.), but is distinct from either species. While the new species is closely related to these species, it is also quite close to L. depictus which is separated out in a different part of Barber's key.These four closely related species are sympatric in New England, although they are markedly different in their overall distribution. The habitat preferences and life cycles of the species are quite different (Sweet, unpublished). The habitat of the new species described below is most unusual for the genus. The greater part of the type series was collected along the margin of a small pond where sedge clumps were standing in the water among occasional exposed rocks rather than in relatively dry fields or slope habitats where the other species occur. The species feeds upon the seeds of the sedge, Carex stricta Lam, and its life cycle is apparently adapted to that of the sedge, which fruits in late May and June. The insect becomes adult in mid-June and lays eggs until mid-July. The eggs remain in diapause over the summer and winter and hatch in May.

Systematics of the Adiantum philippense complex (Pteridaceae, Polypodiales) in Taiwan

Phytotaxa ◽  
2016 ◽  
Vol 263 (2) ◽  
pp. 113 ◽  
Author(s):  
LI-YAUNG KUO ◽  
TIAN-CHUAN HSU ◽  
YI-HAN CHANG ◽  
YAO-MOAN HUANG ◽  
WEN-LIANG CHIOU
Keyword(s):  
Cryptic Species ◽  
Related Species ◽  
Species Complex ◽  
The Other ◽  
Closely Related Species ◽  
Hybrid Combination ◽  
Reproductive Modes ◽  
Taxonomical Revision

Adiantum philippense s.l. is a member of once-pinnate Adiantum but comprise several cytotaxa with different ploidies and reproductive modes. According to the differences of cytotypes, the up-to-date revision had identified three subspecies under the A. philippense complex. In Taiwan, different ploidies and reproductive modes had also been found in this species complex, and existence of (a) cryptic species among these cytotypes had been suggested. The current study focuses on taxonomical revision of Taiwanese A. philippense complex. We sampled not only different Taiwanese cytotypes/populations but also all subspecies under A. philippense and the closely related species of them. By re-examining their phylogeny, ploidies, and reproductive modes, we confirmed that the sexual diploids in Taiwan belong to Adiantum menglianense, and this species is phylogenetically separated from A. philippense. We further approved that A. menglianense can be morphologically distinguished from A. philippense by their frond features and spore numbers in sporangia. Another taxon of Taiwanese A. philippense complex is A. philippense subsp. philippense, which is an apomictic and triploidy subspecies. Additionally, we assigned lectotypes of A. menglianense, and revised the hybrid combination of A. × meishanianum. We also provided a key in order to identify two taxa under Taiwanese A. philippense complex and the other once-pinnate Adiantum species in Taiwan.

A clarification of Medicago sinskiae

1991 ◽  
Vol 69 (1) ◽  
pp. 100-106 ◽  
Author(s):  
Ernest Small ◽  
Brenda Brookes
Keyword(s):  
Chromosome Number ◽  
Key Words ◽  
Related Species ◽  
The Other ◽  
Species Status ◽  
Closely Related Species

Little information has been available to justify the species status of the rare Turkmenian Medicago sinskiae Uljan. recognized by Uljanova in 1964. The holotype and plants raised from its seeds were examined, the chromosome number was determined, and a numerical taxonomic comparison was made of M. sinskiae and the other 12 species of Medicago section Spirocarpos subsection Pachyspirae. It was found that M. sinskiae is well separated from the most closely related species of Medicago and deserves recognition at the rank of species. Key words: Medicago sinskiae, Leguminoseae, alfalfa, taxonomy.

scholarly journals Evolutionary insights into Mariner-like elements in Apis species

2020 ◽  
Author(s):  
Kakeru Yokoi ◽  
Kiyoshi Kimura ◽  
Hidemasa Bono
Keyword(s):  
Phylogenetic Analysis ◽  
Transposable Element ◽  
Related Species ◽  
Horizontal Transfer ◽  
The Other ◽  
Closely Related Species ◽  
Sequences Analysis ◽  
Almost All

AbstractBackgroundMariner and mariner-like elements (MLEs) are distributed in various species and their sequences are highly diverse. In previous reports, a few transposable element in the genomes of Apis species mainly consist of mariner and MLE. For further insight of Apis MLEs, detailed classifications of Apis MLE and sequences analysis of long MLEs, which may potentially encode the transposase, are needed.ResultsMuch more MLEs were detected in A. mellifera genome compared to other Apis species genomes. They were classified into 31 Drosophila MLE classes. In this classification, almost all of MLEs were classified into the three classes belonging to mellifera subfamilies, suggesting that Apis MLEs which exist thorough Apis species derived from single MLE belonging to mellifera subfamily. Phylogenetic analysis using MLEs in the three classes showed that there two types of clusters, of which one consist of multiple Apis species MLEs, and others of only A. mellifera MLEs. Long MLEs analysis showed that only one long MLE encoding complete transposase was found in all Apis genome except for A. mellifera genome, and the MLE and multiple MLEs similar to it were found in A. mellifera genome. The analysis also showed that other several long MLEs encoding complete transposase were found only in A. mellifera genome.ConclusionsAlmost all of Apis MLEs are mellifera subfamilies. Of these MLEs, one types of them settled in Apis species and burst in A. mellifera genome. The other one of MLEs invaded into A. mellifera genome by horizontal transfer and exploded in A. mellifera genome. This is the first example of the finer aspects of MLE evolution among closely related species.

scholarly journals In vitro Regeneration in Three Varieties of White jute (Corchorus capsularis L.)

1970 ◽  
Vol 17 (1) ◽  
pp. 11-18 ◽  
Author(s):  
RH Sarker ◽  
GM Al-Amin ◽  
MI Hoque
Keyword(s):  
Shoot Regeneration ◽  
Multiple Shoots ◽  
Multiple Shoot ◽  
The Other ◽  
Nodal Explants ◽  
Root Induction ◽  
Corchorus Capsularis ◽  
Best Response ◽  
Multiple Shoot Regeneration

Healthy multiple shoot regeneration was observed from petiole-attached cotyledon (PC) explants of CVL-1 on MS containing 0.2 mg/l BAP and 1.0 mg/l IAA. On the other hand, the best response for multiple shoot regeneration in CVE-3 was obtained when the same explants were cultured on MS with 2.5 mg/l BAP and 0.5 mg/l NAA. However, the same explant of D-154 was found to show less responsive compared to other two varieties to produce multiple shoots. Cotyledonary nodal explants of all the three varieties were found to produce maximum number of multiple shoots on MS supplemented with 0.2 mg/l BAP and 1.0 mg/l IAA. Best root induction was observed at the base of the in vitro regenerated shoots on half the strength of MS supplemented with 0.3 mg/l IBA. The in vitro grown plantlets were successfully transplanted into soil. They grew up to maturity, flowered and fruited like the control plants.Key words: Regeneration, White jute, Corchorus capsularisDOI = 10.3329/ptcb.v17i1.1116Plant Tissue Cult. & Biotech. 17(1): 11-18, 2007 (June)

Quadroppia (Coronoquadroppia) sezeki sp. n. (Acari: Oribatida), a new soil mite from Turkey

Biologia ◽  
2009 ◽  
Vol 64 (1) ◽  
Author(s):  
Şule Baran ◽  
Nusret Ayyildiz
Keyword(s):  
New Species ◽  
Related Species ◽  
Mite Species ◽  
Pine Forest ◽  
Morphological Features ◽  
The Other ◽  
Closely Related Species ◽  
Pine Tree ◽  
Soil Mite

AbstractA new soil mite species, Quadroppia (Coronoquadroppia) sezeki sp. n., is described. Adult mites were recorded from moss under a pine tree from a pine forest. The new species differs from the other species of the subgenus by bearing epimera III+IV with a wide key hole shaped inner border and the shape of frontal appendage of rostrum. The morphological features of the new species are also compared with those present in closely related species.

Sign in / Sign up

Export Citation Format

Share Document