Identity of Pourthiaea podocarpifolia (Rosaceae)

Phytotaxa ◽  
2016 ◽  
Vol 269 (3) ◽  
pp. 221 ◽  
Author(s):  
BIN-BIN LIU ◽  
DE-YUAN HONG
Keyword(s):  
Statistical Analysis ◽  
Leaf Blade ◽  
Lower Surface ◽  
Field Observations ◽  
Population Sampling ◽  
Extensive Field ◽  
Character Correlation

Based on extensive field observations, population sampling, examination of a large number of specimens, and subsequent statistical analysis, we found that the characters used previously to distinguish between Pourthiaea blinii and P. podocarpifolia (Rosaceae), i.e. the density of indumentum on the lower surface of leaf blade and inflorescences, are extremely various within a population and continuous in variation, and show no character correlation. These characters are therefore of little value for delimiting these two species. Here we reduce P. podocarpifolia to the synonymy of P. blinii. Lectotypification is made for both Cotoneaster blinii (basionym of Pourthiaea blinii) and Photinia podocarpifolia (basionym of Pourthiaea podocarpifolia).

A taxonomic revision of four complexes in the genus Pourthiaea (Rosaceae)

Phytotaxa ◽  
2017 ◽  
Vol 325 (1) ◽  
pp. 1 ◽  
Author(s):  
BIN-BIN LIU ◽  
DE-YUAN HONG
Keyword(s):  
Leaf Blade ◽  
Taxonomic Revision ◽  
Population Level ◽  
Lower Surface ◽  
Morphological Characters ◽  
Population Sampling ◽  
New Synonyms ◽  
Species Complexes ◽  
Extensive Field ◽  
Qualitative Characters

The taxonomy of four species complexes of Pourthiaea (i.e., P. arguta, P. pilosicalyx, P. salicifolia, and P. sorbifolia), distributed in E, S, and SE Asia, is extremely controversial among authors. This situation may have been caused by the lack of proper analysis and evaluation of the characters at the population level used previously. The present study is the first comprehensive taxonomic revision of these four complexes. We conducted extensive field observations, population sampling, examination of a large number of specimens, and did subsequent statistical analysis of the characters. All the morphological characters used in previous taxonomic treatments were evaluated one by one at the population level. They are length, width, margin, number of lateral veins, type of base, type of apex, and shape of leaf blade, length of petioles, type of inflorescences, length of pedicels, and density of indumentum on leaf blade and inflorescences. All these characters were found to be extremely variable within population and continuously varied between populations, and thus they are of little value for delimiting species. However, seven characters, i.e., width of leaf blade, lateral veins of leaf blade parallel or not, lower surface of leaf blade glabrescent or not, type of fruit, sepals caducous or not, number of carpels, and ratio of number of fertile seeds to that of total seeds, were found distinctly different (for qualitative characters) or statistically discontinuous (for quantitative characters), and thus they are valuable for species delimitation in these four complexes. As a result, we recognize four species and two subspecies, P. pilosicalyx, P. salicifolia, P. sorbifolia, and P. arguta which consists of two subspecies: subsp. arguta and subsp. pustulata. Two new combinations, P. sorbifolia (W. B. Liao & W. Guo) B. B. Liu & D. Y. Hong and P. arguta subsp. pustulata (Lindl.) B. B. Liu & D. Y. Hong, are proposed herein. Forty-one taxa are reduced as new synonyms, and 20 lectotypes are designated here.

A taxonomic revision of the Pourthiaea villosa complex (Rosaceae)

Phytotaxa ◽  
2016 ◽  
Vol 244 (3) ◽  
pp. 201 ◽  
Author(s):  
Binbin Liu ◽  
Deyuan Hong
Keyword(s):  
Leaf Blade ◽  
Taxonomic Revision ◽  
Morphological Characters ◽  
Petiole Length ◽  
Analysis And Evaluation ◽  
Population Sampling ◽  
New Synonyms ◽  
Extensive Field ◽  
Statistical Support ◽  
Proper Analysis

The taxonomy of the Pourthiaea villosa complex, distributed in E Asia, is extremely controversial. The lack of proper analysis and evaluation of the characters used previously may have caused these controversies among taxonomists. The present study is the first comprehensive taxonomic revision of this complex. We have conducted extensive field observations, population sampling, examination of a large number of specimens and subsequent statistical analysis. All morphological characters used in previous taxonomic treatments were analyzed one by one. They include length, breadth, basal angle, and apex of leaf blade, length of petiole, length of pedicel, number of flowers, and density of indumentum on leaves, petiole, pedicel, hypanthium, and branchlets. We found that these characters were extremely variable both within and between populations of this complex. Such variations are continuous or with no statistical support, and there is no correlation between the different characters. Therefore, the characters used in this complex are of little value for species delimitation. As a result of our study, only one species, P. villosa, is recognized, without subdivision. Fourteen names are reduced as new synonyms of P. villosa. In addition, P. villosa is designated as the type of Pourthiaea and 10 lectotypes are designated.

A new species of Hypatima Hübner (Lepidoptera: Gelechiidae) injurious to mango trees in East Africa

1989 ◽  
Vol 79 (3) ◽  
pp. 411-420 ◽  
Author(s):  
K. Sattler ◽  
A. B. Stride
Keyword(s):  
Life History ◽  
New Species ◽  
East Africa ◽  
Female Genitalia ◽  
Field Observations ◽  
Laboratory Studies ◽  
Male And Female ◽  
Extensive Field ◽  
A New Species

AbstractHypatima mangiferae Sattler sp. n. is described from Kenya, where its larva is injurious to commercial mango trees. A description of its life-history, based on extensive field observations and laboratory studies, is also provided. The moth, its male and female genitalia and the damage caused by the larva are illustrated.

scholarly journals A Case Study of the Exotic Poisonous Plants found in Kottayam District, Kerala, India

2020 ◽  
Vol 2 (4) ◽  
pp. 1-12
Author(s):  
Binu Thomas ◽  
Vrunda Vasudev
Keyword(s):  
Exotic Plants ◽  
Plant Part ◽  
Field Observations ◽  
Poisonous Plants ◽  
Number Of Species ◽  
Extensive Field ◽  
Different Types ◽  
Living Organisms

Poisonous plants contain many harmful biological components which can be dangerous for living organisms upon contact or due to ingestion. The current study is based on extensive field observations aimed to find out the various exotic poisonous plants in the Meenachil Taluk of Kottayam District, Kerala. A total of 19 exotic plants belonging to 10 families and 18 genera were documented. Among these, Apocynaceae and Euphorbiaceae were dominant in terms of the number of species with 5 species each. Moreover, the authors also verified the nativity of these plants. The various plant part(s) such as bark, stem, leaves, fruits, latex, and tuber were found to have different types of poisonous compounds. The severity of the illness caused due to these plants and their respective parts depends on the dose in which the organisms ingest their components or the extent to which they make contact with them. People should be aware about such poisonous plants for avoiding various complications.

scholarly journals Taxonomic revision of the Asplenium wrightii complex (Aspleniaceae) with reinstatement of A. alatulum and A. subcrenatum

PhytoKeys ◽  
2021 ◽  
Vol 172 ◽  
pp. 75-91
Author(s):  
Ke-Wang Xu ◽  
Lu-Lu Wang ◽  
Li-Bing Zhang
Keyword(s):  
Species Delimitation ◽  
Taxonomic Revision ◽  
Molecular Data ◽  
Field Observations ◽  
Phylogenetic Studies ◽  
Extensive Field ◽  
Voucher Specimens ◽  
Previously Treated ◽  
Type Information

The Asplenium wrightii complex is morphologically variable and difficult in species delimitation. Owing to lack of comprehensive sampling in phylogenetic studies, the taxonomy of this complex remains unresolved. Based on extensive field observations, specimen examination and our recent molecular data, the present study aims to clarify the identities of three species of Asplenium in this complex from Asia. Our study revealed that A. alatulum and A. subcrenatum, previously treated as synonyms of A. wrightii, should be reinstated. A taxonomic revision of the three species, including their type information, detailed descriptions, voucher specimens, distribution, ecology, as well as taxonomic notes, is carried out.

scholarly journals Statistical Birkeland current distributions from magnetic field observations by the Iridium constellation

2008 ◽  
Vol 26 (3) ◽  
pp. 671-687 ◽  
Author(s):  
B. J. Anderson ◽  
H. Korth ◽  
C. L. Waters ◽  
D. L. Green ◽  
P. Stauning
Keyword(s):  
Magnetic Field ◽  
Statistical Analysis ◽  
Large Scale ◽  
Field Observations ◽  
Marked Contrast ◽  
Data Set ◽  
Current Distributions ◽  
Magnetometer Data ◽  
Pure States ◽  
Birkeland Currents

Abstract. We present a statistical analysis of Birkeland currents derived from Iridium magnetometer data acquired in the Northern Hemisphere to determine the dependence of large-scale currents on the interplanetary magnetic field (IMF) direction. Because the Iridium data span nearly seven years, we can restrict analysis to only those intervals with stable currents. We used image comparison to quantify the consistency between successive one-hour current distributions and selected 1550 two-hour intervals, 5% of the data, for analysis. Results include: no statistically significant average currents are present poleward of 80° during southward IMF; Region-2 currents are weak and confined to latitudes >65° during northward IMF; there is marked contrast between currents for northward and southward IMF but the evolution of the patterns is continuous with IMF rotation. The directions of flows inferred from the most poleward currents are more consistent with theoretical expectations of transport away from magnetopause reconnection than previous results. We attribute the differences to the restriction in this analysis to intervals having relatively stable distributions of current so that the data set corresponds more nearly to pure states of the system.

scholarly journals A Case Study of the Exotic Poisonous Plants found in Kottayam District, Kerala, India

2020 ◽  
Vol 2 (4) ◽  
pp. 1-12
Author(s):  
Binu Thomas ◽  
Vrunda Vasudev
Keyword(s):  
Exotic Plants ◽  
Plant Part ◽  
Field Observations ◽  
Poisonous Plants ◽  
Number Of Species ◽  
Extensive Field ◽  
Different Types ◽  
Living Organisms

Poisonous plants contain many harmful biological components which can be dangerous for living organisms upon contact or due to ingestion. The current study is based on extensive field observations aimed to find out the various exotic poisonous plants in the Meenachil Taluk of Kottayam District, Kerala. A total of 19 exotic plants belonging to 10 families and 18 genera were documented. Among these, Apocynaceae and Euphorbiaceae were dominant in terms of the number of species with 5 species each. Moreover, the authors also verified the nativity of these plants. The various plant part(s) such as bark, stem, leaves, fruits, latex, and tuber were found to have different types of poisonous compounds. The severity of the illness caused due to these plants and their respective parts depends on the dose in which the organisms ingest their components or the extent to which they make contact with them. People should be aware about such poisonous plants for avoiding various complications.

scholarly journals METHOD FOR DETERMINING THE HYPER SENSITIVE RESPONSE OF POTATO PLANTS TO CLUSTERS OF THE COLORADO POTATO BEETLE EGGS FOR USE IN BREEDING

ÈKOBIOTEH ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 255-262
Author(s):  
I.S. Mardanshin ◽  
◽  
A.V. Sorokan ◽  
A.A. Gordeev ◽  
G.V. Benkovskaya ◽  
...  
Keyword(s):  
Colorado Potato Beetle ◽  
Leaf Blade ◽  
Reactive Oxygen ◽  
Leaf Tissue ◽  
Lower Surface ◽  
Plant Responses ◽  
Vascular Bundles ◽  
Potato Beetle ◽  
Urgent Task ◽  
Protective Reaction

The creation of new varieties of potato revealing innate highly effective mechanisms of protection against Colo-rado potato beetle is an urgent task of breeding, which requires the development of methods that allow standardizing certain plant responses to different aspects of the influence of this phytophage under laboratory conditions. The laying of eggs by insects on the surface of plant laves leads to the development of an intense protective reaction and the production of ovicides, intensive death of tissue, followed by the loss of eggs or their drying. To simulate the laying of eggs on the leaves, we used a washout from the surface of the clutches of the Colorado potato beetle containing a pool of elicitors of plant defense reactions. On cultivars Bashkirsky (high resistance to the Colorado potato beetle) and Udacha (medium-resistant cultivar), drying of leaf areas was observed in response to the treatment of the lower surface of the leaf blade, and on cultivar Rannyaya rosa (unstable cultivar), there was no reaction. The dried spots on the leaf blade were strictly limited to the place where the wash was applied. It was found that the formation of reactive oxygen species in response to the application of the washout occurs only on potato varieties Bashkirsky and Udacha with the development of a hypersensitive response, which corresponded to the drying of leaf blades observed under the field conditions at the sites of clutch attachment. Localization of hydrogen peroxide and superoxide anion occurs in the cells of the vascular bundles and adjacent tissues. On the Rannyaya Rosa cultivar, the application of the washout did not lead to the accumulation of reactive oxygen spe-cies in the leaf tissue and the drying of the leaves.

Sign in / Sign up

Export Citation Format

Share Document