leaflet anatomy
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PhytoKeys ◽  
2021 ◽  
Vol 180 ◽  
pp. 31-52
Author(s):  
Larry R. Noblick ◽  
Bruno F. Sant’anna-Santos

This paper is an investigation into how the anatomy changes within a leaflet and between the leaflets of a single leaf blade of Butia. Four species of Butia were studied: Butia paraguayensis, B. eriospatha, B. yatay and B. odorata. Changes in the anatomical characters are important because some have been used in keys to help separate the species. Recently, anatomical mid-rib characters were used in a key to separate species of Butia. We found that characters, such as abaxially projected or rounded mid-rib fibrous ring or number and arrangement of accessory bundles, do change within a single leaflet or between the leaflets of a single leaf blade. Growing conditions and leaf developmental maturity are also important factors that influence leaflet anatomy and may cause one to be misled in an identification key based on anatomical characters. We re-emphasize the importance of always sampling from the same part of the leaf, to have a broader sampling, be attentive to the environmental condition and health of the plant from which you are sampling and to consider population differences.


2020 ◽  
Vol 181 (7) ◽  
pp. 697-715
Author(s):  
Mario Coiro ◽  
Nicola Jelmini ◽  
Hanna Neuenschwander ◽  
Michael A. Calonje ◽  
Andrew P. Vovides ◽  
...  
Keyword(s):  

2020 ◽  
Vol 22 (2) ◽  
pp. 103-110
Author(s):  
R.A. Bamigboye ◽  
A.A. Yusuf ◽  
F.A. Oloyede

The effect of various concentrations of Lead on stipe and leaflet anatomy of Pteris vittata and Pityrogramma calomelanos were investigated. Fernlets were transplanted into 5 kg pots of soil pre-treated with five different concentrations of Lead, adequately watered and arranged in a complete randomized design in the screen house. Pots with no Lead treatment served as control. At twelve weeks after planting, plants were carefully removed, washed and taken to the laboratory. Anatomical sections of leaflets and stipe of each of the treatments were carried out with a sledge microtome (10-15 μm). Microscopic observations of structures were made after staining the sections. In Pteris vittata, the thickness of the cuticle of the stipe increased with increasing Lead concentrations but the reverse of this was observed in Pityrogamma calomelanos. There was also significant reduction of epidermal and mesophyll cell area of both species with increasing Lead concentrations. It can be concluded from this study that P. vittata has a higher tolerance level to Lead than Pityrogramma calomelanos. Key words: Anatomy, Cuticle thickness, Ferns, Lead, Pteridaceae.


Flora ◽  
2019 ◽  
Vol 260 ◽  
pp. 151484 ◽  
Author(s):  
Katiane Reis Mendes ◽  
Ana Paula Fortuna-Perez ◽  
Tatiane Maria Rodrigues

2018 ◽  
Vol 187 (1) ◽  
pp. 99-117 ◽  
Author(s):  
Nayla Fernanda Silva ◽  
Rosani Do Carmo de Oliveira Arruda ◽  
Flavio Macedo Alves ◽  
Ângela Lúcia Bagnatori Sartori
Keyword(s):  

Flora ◽  
2018 ◽  
Vol 239 ◽  
pp. 20-44 ◽  
Author(s):  
Andrew P. Vovides ◽  
James A.R. Clugston ◽  
José Said Gutiérrez-Ortega ◽  
Miguel A. Pérez-Farrera ◽  
M.Ydelia Sánchez-Tinoco ◽  
...  

Phytotaxa ◽  
2016 ◽  
Vol 270 (3) ◽  
pp. 161 ◽  
Author(s):  
MIGUEL A. PÉREZ-FARRERA ◽  
ANDREW P. VOVIDES ◽  
CHRISTIAN RUIZ-CASTILLEJOS ◽  
SONIA GALICIA ◽  
ANGÉLICA CIBRIÁN-JARAMILLO ◽  
...  

The validity of Zamia splendens has been debated, mainly as a result of its synonymy under Z. katzeriana. Field explorations have uncovered previously unknown populations, and some do not appear to match the circumscription of Z. katzeriana. Some populations are morphologically more similar to, and often sympatric with, Z. loddigesii. This study aims at clarifying the morphological and anatomical distinction between the three taxa. To study the morphological variation, a total of 88 individuals from four populations were sampled, these spanning the geographical range of the three cycads in southern Mexico. Univariate, principal component and discriminant analyses of 12 vegetative morphological variables were carried out. To study variation in leaflet anatomy, three individuals per population were analysed for nine anatomical variables and their stomatal index. Standard plant histological techniques and bright field light microscopy were used for observations and measurements of leaflet anatomical variables. Both morphological and anatomical variables were analysed by multivariate statistical methods. Principal component and discriminant analyses on both morphological and anatomical variables and the stomatal index have shown a significant difference between the populations (P = <0.0002) with scatter diagram dispersion indicating three distinctive groups, with Z. katzeriana values consistently intermediate between those of Z. splendens and Z. loddigesii. Some individuals of Z. katzeriana have a leaflet morphology and anatomy similar to Z. loddigesii, yet others resemble Z. splendens. The three taxa comprise distinct species and we propose the acceptance of Z. splendens as independent from Z. katzeriana. The intermediate placement of Z. katzeriana in the analyses suggests a hybrid origin with Z. splendens and Z. loddigesii as putative ancestors.


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