scholarly journals Arquitectura foliar y anatomía de la corteza y la madera de Quercus sartorii y Q. xalapensis (Fagaceae)

2017 ◽  
pp. 63
Author(s):  
Dorismilda Martínez-Cabrera ◽  
Teresa Terrazas ◽  
Fernando Zavala-Chávez
Keyword(s):  
Leaf Size ◽  
Secondary Vein ◽  
Leaf Architecture ◽  
Venation Pattern ◽  
Similar Morphology ◽  
Stomata Number

Leaf architecture and wood and ba rk anatomy of Quercus sartorii and Q. xalapensis, species with similar morphology, are described and compared, with the main purpose of recognizing features that may contribute to distinguish them. The results showed that venation pattern features such as areole number and shape, veintlets branching, and secondary vein arrangement inside the tooth are characters that help distinguish both species, but not leaf size and stomata number. Both species differ in their external bark appearance and phelloderm. Wood of both species is similar to that reported for the genus, but there is a tendency to having fewer vessels and solitary in radial rows in Q. sartorii. These traits should be used together with floral, fruit and seed features to support the recognition of both species.

Leaf Architecture of Hoya incrassata Warb. and Hoya crassicaulis Elmer x Kloppenb. (Apocynaceae): Taxonomic Identification and Conservation Concerns

2015 ◽  
Vol 15 (1) ◽  
Author(s):  
Angela Marie M. Villareal ◽  
Inocencio E. Buot Jr.
Keyword(s):  
The Philippines ◽  
Conservation Strategies ◽  
Width Ratio ◽  
Secondary Vein ◽  
Shape Variation ◽  
Leaf Architecture ◽  
Forest Protection ◽  
Primary Vein ◽  
Acuminate Apex ◽  
Entire Margin

Hoya incrassata Warb. and Hoya crassicaulis Elmer x Kloppenb, both Philippine endemics have been always thought to be one species. Leaf architecture study of the two controversial species were examined to determine if they have similar characteristics in terms of leaf architecture, the main morphological character used in fossil studies and in taxonomic works dealing with sterile plant specimens. The unifying characters of the two species are the symmetrical and unlobed blade, acuminate apex, entire margin, pinnate primary vein, straight primary vein course, weak brochidodromous secondary vein, moderate relative secondary vein thickness, sinuous secondary vein course, loop-forming branches, enclosed by 3° or 4° arches, composite intersecondary veins, random reticulate tertiary vein, regular polygonal reticulate quaternary vein, looped ultimate marginal venation, and random areole arrangement. The characters blade length to width ratio, blade class and form, base shape, variation in secondary vein angle of divergence, and areole development delineates the two species apart. The study proved that H. incrassata and H. crassicaulis are two different species. Leaf architecture can be of great use when identifying and classifying seemingly similar plant species and sterile specimens. As both species are endemics to the Philippines, conservation ought to be massive as these species can be lost anytime with forest destruction. Conservation strategies could include forest protection and domestication.     Keywords - Botany, leaf architecture, taxonomy, Hoya crassicaulis, Hoya incrassata, Philippines

scholarly journals Leaf architecture and petiole anatomy of Philippine Dipterocarpus species (Dipterocarpaceae)

2020 ◽  
Vol 27 (1) ◽  
pp. 1-14
Author(s):  
Jonathan O Hernandez ◽  
Lerma SJ Maldia ◽  
Dennis E Pulan ◽  
Inocencio E Buot ◽  
Byung Bae Park
Keyword(s):  
Leaf Size ◽  
The Philippines ◽  
Molecular Techniques ◽  
Vascular Bundles ◽  
Leaf Architecture ◽  
Forest Reserve ◽  
Freehand Technique ◽  
Plant Taxon ◽  
Taxonomic Markers ◽  
Upgma Phenogram

The study investigated the leaf architecture and petiole anatomy of eight Dipterocarpus (Dipterocarpaceae) species growing in Mount Makiling Forest Reserve (MMFR) in the Philippines to delineate the species, especially during their non-flowering phase. Leaf and petiole samples from MMFR were examined following the manual on leaf architecture studies. Freehand technique was used to examine the stomata and petiole characters. A UPGMA phenogram was then generated to determine the relationships among Dipterocarpus species using 26 leaf and petiole characters. The most useful characters to delineate Dipterocarpus species are the presence of trichomes, the arrangement of vascular bundles (medullary and outer vascular bundles), areolation, fimbrial vein, and leaf size. Other characters viz., the laminar ratio, blade class, laminar shape, base shape, margin type, and intersecondary, and layers and shape of parenchyma and collenchyma cells were useful as unifying characters. Therefore, certain characters of the leaf architecture and petiole anatomy may be used as taxonomic markers to delineate and correlate the Dipterocarpus species in the Philippines particularly during the nonflowering phase of the species. However, further investigations using samples from the wild populations of the species and molecular techniques may be done to elucidate the taxonomic use of the characters presented in this study. Bangladesh J. Plant Taxon. 27(1): 1-14, 2020 (June)

STUDIES ON LEAF VENATION IN SELECTED CLIMBERS

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
B. K. AUTI
Keyword(s):  
Leaf Size ◽  
Higher Order ◽  
Secondary Vein ◽  
Gloriosa Superba ◽  
Clitoria Ternatea ◽  
Leaf Venation ◽  
Line Drawings ◽  
Size And Shape ◽  
Tooth Type ◽  
Leaf Size And Shape

In this paper studies on leaf venation characterized for four species of climbers namely, Clitoria ternatea Linn, Daemia extensa R. Br., Aristolochia bracteata Retz, and Gloriosa superba Linn. To morphotype leaves, these were sorted out on the basis of serrated versus entire margins, primary and secondary vein patterns, etc. With some exceptions, these characters are usually stable within morphotypes. The leaf size and shape are the least reliable characters in identifying leaves. After the leaves are sorted into these broad categories, one can further divide them by looking at higher order venation patterns and tooth type. This paper illustrated with line drawings of prepared stained leaves, provides a framework of the leaves. This study will be very useful to a broad range of people who work with plants.

scholarly journals Delineation of the selected Cucumis L. species and accessions using leaf architecture characters

2019 ◽  
Vol 20 (3) ◽  
pp. 629-635
Author(s):  
LAILANI A LAILANI A. MASUNGSONG ◽  
MARILYN M BELARMINO ◽  
INOCENCIO E BUOT JR
Keyword(s):  
Euclidean Distance ◽  
Group Method ◽  
Secondary Vein ◽  
Leaf Architecture ◽  
Good Tool ◽  
Pair Group ◽  
Tertiary Vein ◽  
Irregular Pattern ◽  
Taxonomic Confusion ◽  
Distance Coefficient

Abstract. Masungsong LA, Belarmino MM, Buot IEJr. 2019. Delineation of the selected Cucumis L. species and accessions using leaf architecture characters. Biodiversitas 20: 629-635. Regardless of the several attempts of the early and recent studies to separate the wild species of Cucumis from the cultivated ones, there is still taxonomic confusion brought about by the similarities in morphology of the genus. In a gene bank with so many species and accessions of Cucumis stored, it is appropriate to delineate these numerous accessions to save time and resources as well. This study aims to delineate fifty selected Cucumis accessions based on leaf architecture. Using Unweighted Pair Group Method using Averages (UPGMA) and Euclidean distance coefficient, a cluster analysis for the fifty Cucumis accessions was done. A dendogram with cophenetic coefficient of 0.9606 supported the clustering of the Cucumis species and accessions. At Eucledian distance of 1.5 two major clusters were formed on the basis of secondary vein spacing. Cucumis melo accessions separated from all the remaining accessions of C. myriocarpus, C. metuliferus, C. anguria and C. anguria var longaculeatus for having an increasing towards the base secondary vein spacing while the rest have irregular pattern of secondary vein spacing. Further sub-clustering of the remaining accessions comprising four species were delineated on the basis of tertiary vein (C. myriocarpus), tertiary vein angle to primary (C. metuliferus), and blade class (C. anguria and C. anguria var longaculeatus). Laminar shape delineated C. myriocarpus accessions from each other, apex angle for C. metuliferus accessions, and primary vein size for C. melo accessions. Results implied that leaf architecture is a good tool to classify the numerous accessions of Cucumis.

Leaf architecture in Adansonia, Bombax and Celiba (Bombacaceae)

1996 ◽  
Vol 9 (2) ◽  
pp. 255 ◽  
Author(s):  
RB Bhat
Keyword(s):  
Leaf Architecture ◽  
Venation Pattern ◽  
The Family ◽  
Shape And Size

Leaf architecture was investigated in three species of the family Bombacaceae. The mature leaflets from both fresh and herbarium materials were cleared using the method of Mohan Ram and Nayyar (1977), and terminologies of Hickey (1973) were used to determine the leaf characters and the venation patterns. The whole lamina is more or less symmetrical in all the species investigated. The major venation pattern conforms to the types of camptodromous mixed with festooned brochidodromous, and festooned brochidodromous. In all the members of the family studied, the primary and secondary veins are ornamented with parenchymatous bundle sheaths. Imperfectly developed areoles are predominant over the developed ones. The size and the shape of the areole is variable. The vein endings may be simple, or once or sometimes twice dichotomously branched. The highest venation order of the family is sixth degree. Marginal ultimate venation is looped. Tracheids are either uni-, bi-, tri-, or multi-seriate and vary in shape and size, and are commonly found at the free ends of the veins. Extension cells and isolated tracheids are not common. These characters are remarkably different from those in members of the Malvaceae.

scholarly journals SAMBA controls the rate of cell division in maize development through APC/C interaction

2021 ◽  
Author(s):  
Pan Gong ◽  
Michiel Bontinck ◽  
Kirin Demuynck ◽  
Jolien De Block ◽  
Kris Gevaert ◽  
...  
Keyword(s):  
Cell Division ◽  
Cell Cycle Progression ◽  
Leaf Size ◽  
Leaf Length ◽  
Leaf Architecture ◽  
Or Efficiency ◽  
Division Rate ◽  
Knock Out ◽  
Growth Defects ◽  
Altered Cell

AbstractSAMBA has been identified as a plant-specific regulator of the anaphase-promoting complex (APC/C) which controls unidirectional cell cycle progression in Arabidopsis, but so far its role was not studied in monocots. Here, the association of SAMBA with APC/C was shown to be conserved in maize. Two samba CRISPR alleles showed growth defects that aggravated with plant age such as dwarfed plants due to shortened upper leaf length, erect leaf architecture, and reduced leaf size due to an altered cell division rate and cell expansion. Despite the fact that in both alleles the frameshift occurred at the same position, the two alleles differed in the severity and developmental onset of the phenotypes, because samba-1 represented a knock-out allele, while translation re-initiation in samba-3 resulted in a truncated protein that was still able to interact with the APC/C and regulate its function, albeit with altered APC/C activity or efficiency. Our data are consistent with a dosage-dependent role for SAMBA to control developmental processes for which a change in growth rate is pivotal.

scholarly journals Short communication: Variations in leaf morphological characters of Shorea leprosula in progeny trial stand of a logging concession in Kalimantan, Indonesia

2021 ◽  
Vol 22 (11) ◽  
Author(s):  
Alnus Meinata ◽  
MUHAMMAD NA’IEM ◽  
DWI TYANINGSIH ADRIYANTI
Keyword(s):  
Measurement Data ◽  
Principal Component ◽  
Leaf Size ◽  
Morphological Characters ◽  
Leaf Architecture ◽  
Size Category ◽  
Morphological Variations ◽  
Progeny Trial ◽  
Variable Contribution ◽  
Shorea Leprosula

Indonesia has the highest distribution of Dipterocarpaceae members, and Shorea leprosula is one of the species that has a natural hybrid in its habitat. Furthermore, the members have intermediate morphological character with the neighboring species, Shorea curtisii. This study aimed to investigate the morphological variations of Shorea leprosula Miq. Progeny trial in PT Sari Bumi Kusuma. The morphological level of 72 Shorea leprosula in PT Sari Bumi Kusuma was identified through sampling. Furthermore, macroscopic and microscopic observations were conducted, and the measurement data were analyzed using cluster and principal component analyses to explain the morphological variable contribution. The results showed leaf architecture variations in laminar shape, apex shape, base shape, and midrib thickness category. The cluster analyses classified the samples into four cluster groups and they consist of a notophyll leaf size category with a rounded base. Meanwhile, the second group consists of an ellipse laminar shape with medium midrib thickness, and the third has an oblong laminar with an obtuse apex shape. The fourth group has a notophyll leaf size category with an obtuse base. The principal component analysis showed that the base shape has the highest contribution to diversity in the samples.

Electron investigations of rhabdovirus-like particles in mexican bean beetles and crickets

1978 ◽  
Vol 36 (2) ◽  
pp. 378-379
Author(s):  
J. R. Adams ◽  
G. J Tompkins ◽  
A. M. Heimpel ◽  
E. Dougherty
Keyword(s):  
Biological Control ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Developmental Stages ◽  
Management Program ◽  
Acheta Domesticus ◽  
Epilachna Varivestis ◽  
House Cricket ◽  
Similar Morphology ◽  
Bean Beetle

As part of a continual search for potential pathogens of insects for use in biological control or on an integrated pest management program, two bacilliform virus-like particles (VLP) of similar morphology have been found in the Mexican bean beetle Epilachna varivestis Mulsant and the house cricket, Acheta domesticus (L. ).Tissues of diseased larvae and adults of E. varivestis and all developmental stages of A. domesticus were fixed according to procedures previously described. While the bean beetles displayed no external symptoms, the diseased crickets displayed a twitching and shaking of the metathoracic legs and a lowered rate of activity.Examinations of larvae and adult Mexican bean beetles collected in the field in 1976 and 1977 in Maryland and field collected specimens brought into the lab in the fall and reared through several generations revealed that specimens from each collection contained vesicles in the cytoplasm of the midgut filled with hundreds of these VLP's which were enveloped and measured approximately 16-25 nm x 55-110 nm, the shorter VLP's generally having the greater width (Fig. 1).

Studies on leaf architecture of the Oleaceae with a note on the systematic position of the genusNyctanthes

1983 ◽  
Vol 94 (3-4) ◽  
pp. 201-211 ◽  
Author(s):  
J. S. S. Mohan ◽  
J. A. Inamdar
Keyword(s):  
Systematic Position ◽  
Leaf Architecture

Venation pattern of eleven species ofTephrosia

1986 ◽  
Vol 97 (7-8) ◽  
pp. 475-478
Author(s):  
R. P. Bhatt ◽  
S. K. Tuteja
Keyword(s):  
Venation Pattern ◽  
Eleven Species
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