scholarly journals Developmental Flower and Rhizome Morphology in Nuphar (Nymphaeales): An Interplay of Chaos and Stability

2020 ◽  
Vol 8 ◽  
Author(s):  
Elena S. El ◽  
Margarita V. Remizowa ◽  
Dmitry D. Sokoloff
Keyword(s):  
Rhizome Morphology

scholarly journals Morphology, evolution and taxonomy of Wachendorfia (Haemodoraceae)

Bothalia ◽  
1992 ◽  
Vol 22 (1) ◽  
pp. 59-57 ◽  
Author(s):  
N. E. Helme ◽  
H. P. Linder
Keyword(s):  
Ecological Speciation ◽  
Morphology Evolution ◽  
Distribution Maps ◽  
Speciation Model ◽  
Taxonomic Descriptions ◽  
Infraspecific Taxa ◽  
Cape Floral Region ◽  
Variable Species ◽  
Rhizome Morphology ◽  
Small Genus

Wachendorfia Burm. is a small genus endemic to the Cape Floral Region. Pour species are recognised in this study. Two species were originally described by Burman in 1757 and these were followed by numerous other descriptions of what is essentially one very variable species  (W. paniculaia Burm.). This variation is discussed and reasons are given as to why the recognition of formal infraspecific taxa is inappropriate. Formal taxonomic descriptions, distribution maps and a key to the species are provided. Rhizome morphology, leaf anatomy and pollen and seed coat structures were investigated and illustrations are provided. A cladogram was inferred and this is consistent with an ecological speciation model for the genus. The two species with the most restricted distribution (W. brachyandra W.F. Barker and W. pamfiora W.F. Barker) are considered to be the most recently evolved. Features of systematic and ecological interest (e.g. floral enantiomorphy) are discussed.

Morphotypic Differentiation in the South-Western Australian Restiad Lyginia barbata R.Br (Restionaceae)

1993 ◽  
Vol 41 (1) ◽  
pp. 91 ◽  
Author(s):  
TL Bell ◽  
JS Pate
Keyword(s):  
Growth Rates ◽  
Dry Matter ◽  
The Other ◽  
Spikelet Number ◽  
Male And Female ◽  
First Reproduction ◽  
Ovule Number ◽  
Culm Density ◽  
Rhizome Morphology ◽  
Western Australian

Study of Lyginia barbata across its distribution range in south-western Australia identified five distinctive morphotypes, viz. a tall-culmed, densely tufted fire-sensitive obligate seeder (S morphotype), a tall densely tufted fire-resistant resprouter (R1), a short flexuose-culmed, tufted resprouter (R2), a weakly clonal, semi-tufted resprouter (R3) and a short-culmed, widely spreading clonal form (R4). There was little variation within a morphotype between habitat locations and no evidence of intergrading of cohabiting morphotypes. Morphotype-specific differences were observed in culm height, rhizome morphology, culm density and spikelet morphology. Differences in reproductive biology related to the time of first reproduction in juvenile recruits, spikelet number per male and female culm, ovule number per female culm and seed : ovule ratio. Differences of a physiological nature were observed in seedling growth rates and proportional biomass (dry matter) allocations to culms, rhizomes, spikelets and seeds. Comparative quantitative scorings of the above features according to concepts of r- and K-selection rated the S form strongly r-selected, the R4 form equally strongly K-selected and the other forms (R1, R2 and R3) intermediate and with the R1 form possibly more r-selected than the others. It is suggested that the data provide a basis on which future taxonomic decisions regarding the taxon might be made.

Generic affiliation of Phyllagathis phamhoangii (Melastomataceae) from Vietnam

Phytotaxa ◽  
2020 ◽  
Vol 470 (3) ◽  
pp. 217-225
Author(s):  
JIN-HONG DAI ◽  
QI-YUAN ZHUANG ◽  
REN-CHAO ZHOU ◽  
JAREARNSAK SAE WAI ◽  
TRUONG VAN DO ◽  
...  
Keyword(s):  
Leaf Blade ◽  
Phylogenetic Analyses ◽  
Leaf Shape ◽  
Crystal Form ◽  
New Combination ◽  
Acuminate Apex ◽  
Rhizome Morphology

Phyllagathis phamhoangii, a species from Vietnam, was originally described in Phyllagathis based on its resemblance to P. nanakorniana and P. subrotunda in habit, rhizome morphology and leaf shape. However, its overall morphology, mainly stamen and capsule morphology, corresponds better with Fordiophyton indicating questionable generic affiliation. We included molecular (nrITS) and anatomical (crystal form) evidences to resolve the generic affiliation of P. phamhoangii. Our phylogenetic analyses recovered P. phamhoangii inside Fordiophyton and P. nanakorniana and P. subrotunda inside the Kerriothyrsus clade. The Fordiophyton clade is characterized by the presence of raphides, while the Kerriothyrsus clade is characterized by druses. Based on these evidences, P. phamhoangii is herein transferred to Fordiophyton, resulting in a new combination F. phamhoangii. It is morphologically similar to F. peperomiifolium but differs from the latter in the leaf blade with shortly acuminate to acuminate apex (vs. broadly acute), hypanthium 4-ridged (vs. not ridged), and connectives of shorter stamens dorsally spurred (vs. not spurred).

scholarly journals VARIASI DAN HUBUNGAN FENETIK AKSESI KUNYIT DI YOGYAKARTA DAN SEKITARNYA

2021 ◽  
Vol 26 (1) ◽  
pp. 35-56
Author(s):  
Aditiana Vimala Guna ◽  
Purnomo Purnomo
Keyword(s):  
Curcuma Longa ◽  
Anatomical Variations ◽  
Morphological Characters ◽  
Morphological Variations ◽  
Stomata Size ◽  
Anatomical Characters ◽  
Phenetic Relationship ◽  
Surrounding Areas ◽  
Large Clusters ◽  
Rhizome Morphology

Tujuan penelitian ini adalah menentukan variasi morfologis dan anatomis tiap aksesi Curcuma longa, serta hubungan fenetik pada spesies antar aksesi Curcuma longa. Sebanyak 13 sampel diambil di area Yogyakarta dan sekitarnya, karakter morfologis yang dibandingkan bersumber dari akar, rimpang, daun meliputi bentuk dan ukuran. Karakter anatomis diamati pada daun dan rimpang. Penentuan karakter morfologis berdasarkan Protection of Plant Varieties dan Farmers’ Rights Authority. Hubungan fenetik menggunakan perbandingan karakter morfologis dan anatomis spesies Curcuma longa yang diteliti. Hasil penelitian menunjukkan variasi morfologis Curcuma longa di Yogyakarta dan sekitarnya memiliki perbedaan tinggi tanaman, morfologis daun, serta morfologis akar dan rimpang. Variasi karakter anatomis Curcuma longa memiliki perbedaan ketebalan epidermis daun, ukuran dan densitas stomata, ketebalan berkas pengangkut, ketebalan epidermis dan hipodermis rimpang. Berdasarkan analisis fenetik Curcuma longa di Yogyakarta dan sekitarnya dapat diketahui bahwa hubungan kekerabatan fenetik berdasarkan karakter morfologis terbagi menjadi dua klaster besar dan empat subklaster, sedangkan berdasarkan karakter anatomis terbagi menjadi dua klaster dan enam subklaster.VARIATION AND PHENETIC RELATIONSHIP OF TUMERIC ACCESSIONS IN YOGYAKARTA AND SURROUNDING AREASThe purpose of this study was to determine the morphological and anatomical variations of each accession of Curcuma longa, as well as the phenetic relationship among accessions of Curcuma longa. A total of 13 samples were taken in the Yogyakarta and surrounding areas, the morphological characters compared from roots, rhizomes, leaves include shape and size. The anatomical characters were observed in the leaves and rhizomes. The determination of morphological characters based on Protection of Plant Varieties and Farmers’ Rights Authority. The phenetic relationship used a comparison of the morphological and anatomical characters of the Curcuma longa species studied. The results showed that the morphological variations of Curcuma longa in Yogyakarta and its surroundings had differences in plant height, leaf morphology, and root and rhizome morphology. Variations in anatomical characters of Curcuma longa have differences in leaf epidermis thickness, stomata size and density, carrier bundle thickness, epidermis and rhizome hypodermis thickness. Based on the phenetic analysis of Curcuma longa  in Yogyakarta and its surroundings, it shows phenetic relationship based on morphological characters is divided into two large clusters and four sub-clusters, while based on anatomical characters it is divided into two clusters and six sub-clusters. 

scholarly journals Influence of propagation method a nd indole-3-butyric acid on growth and development of in vitro- and ex vitro-derived lingonberry plants

2006 ◽  
Vol 86 (1) ◽  
pp. 235-243 ◽  
Author(s):  
Samir C Debnath
Keyword(s):  
Butyric Acid ◽  
Growth And Development ◽  
Shoot Growth ◽  
Adventitious Shoot ◽  
Ex Vitro ◽  
Adventitious Shoot Regeneration ◽  
Propagation Methods ◽  
Rhizome Morphology ◽  
Rhizome Development

The effects of two propagation methods and four indole-3-butyric acid (IBA) concentrations were studied in two cultivars of lingonberry (Vaccinium vitis-idaea L.). Cultivars Regal and Erntedank, propagated by conventional softwood cuttings (SC) and adventitious shoot regeneration from excised leaves of micropropagated shoots (LC), were evaluated for growth and morphology. Significant two- and three-way interactions for shoot and rhizome characteristics were observed among the treatments. The LC plants produced shorter and less-vigorous shoots but had more stems, branches, leaves and rhizomes in contrast to conventional cuttings, which rarely produced rhizomes. IBA had an effect on shoot and rhizome morphology, but not on the frequency of rhizome formation. In vitro culture on zeatin-containing nutrient medium apparently induces the juvenile branching characteristics that favored enhanced rhizome production. The advantage of shoot and rhizome production of adventitiously produced LC plants over SC plants varied between the genotypes. Erntedank plants had better shoot growth and rhizome development across propagation methods than did Regal plants. Key words: Vaccinium vitis-idaea, propagation, regeneration, cuttings, indole-3-butyric acid

Estimates of structural complexity in clonal plant morphology: comparisons of grazed and ungrazed Acaena magellanica rhizomes

1999 ◽  
Vol 77 (6) ◽  
pp. 869-876 ◽  
Author(s):  
Jon Moen ◽  
Pär K Ingvarsson ◽  
David WH Walton
Keyword(s):  
Structural Complexity ◽  
Fractal Dimensions ◽  
Clonal Plant ◽  
Plant Morphology ◽  
Directional Growth ◽  
Growth Simulation ◽  
Rhizome Growth ◽  
Highly Correlated ◽  
Rhizome Morphology ◽  
Parameter Values

The aim of this study is to examine the information given by various indices of rhizome morphology that describe grazed and ungrazed rhizome systems of Acaena magellanica (Rosaceae). Internode lengths, branching probabilities, and branching angles were estimated from grazed and ungrazed rhizomes in the field. These parameter values were then used in computer simulations of rhizome growth, and the structural complexity of the simulated rhizomes were described using size, topology, and fractal dimensions. Grazed rhizomes had shorter internodes, higher probabilities of branching, and more open branching angles than ungrazed rhizomes. This resulted in a more directional growth (herring-bone pattern) in the simulated ungrazed rhizomes, whereas the grazed rhizomes had a more space-filling growth pattern. Most indices, even though they are based on different mathematical and theoretical backgrounds, were highly correlated and thus equally good at describing the structural complexity exhibited by the rhizomes. However, indices have different relationships to theories about function, and we suggest that any study of structural complexity of branching systems should use several different indices of shape depending on the questions asked.Key words: Acaena magellanica, fractal dimension, grazing, growth simulation, topology.

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