Bin Du¹, Qixia Wu¹, Shuochen Jiang¹, Dingyue Zhang¹, Yue Qiao¹, Yimei Xie², Jianlong Xu^3,*, Jianqiang Zhu^1,*

Phyton-International Journal of Experimental Botany, Vol.90, No.2, pp. 437-447, 2021, DOI:10.32604/phyton.2021.012903

Abstract The improvement of grain quality in aromatic rice is very important for farmer to increase their income. Present study was conducted with a two-year field experiment and three aromatic rice cultivars in order to study the effects of exogenous α-ketoglutaric acid on yield formation, grain quality characters and the biosynthesis of 2-acetyl-1-pyrroline (2-AP, key component of aromatic rice’s fragrance) in aromatic rice. At heading stage, 0.50 mmol L^–1 (T1) and 1.00 mmol L^–1 (T2) α-ketoglutaric acid solutions were overhead sprinkle to aromatic rice plants, respectively while the treatment which was overhead sprinkled with distilled water was set as control (CK).… More >

Mashile SP^1,2, MP Tshisikhawe¹

Phyton-International Journal of Experimental Botany, Vol.84, No.2, pp. 473-477, 2015, DOI:10.32604/phyton.2015.84.473

Abstract This paper looked at the leaf architecture characteristics of Vachellia tortilis to determine if either there is or not an effect of the tropic line on plants. Vachellia tortilis leaves were sampled along a national road (N1) in Limpopo province. Sampling points were set 10 km apart away from the Tropic of Capricon in opposite directions. Leaf morphology revealed that leaves of V. tortilis are bipinnately compound with alternate arrangement. The venation pattern of the pinnules was eucamptodromus and brochidodromous with imperfect reticulation. Areoles were imperfect and pentagonal or irregular in shape. More >

Espinoza Sánchez EA¹, H Silos Espino¹, S Flores Benitez¹, LL Valera Montero¹, E Rodríguez Salazar², C Gallegos Vázquez³, F Guevara Lara⁴, M González Chavira⁵, HS Guzmán Maldonado⁵

Phyton-International Journal of Experimental Botany, Vol.83, pp. 299-306, 2014, DOI:10.32604/phyton.2014.83.299

Abstract Dendrograms were constructed based on AFLP markers and a table was used to group fruit characters of wild and cultivated genotypes of Mexican nopal (Opuntia spp.). The AFLP dendrogram obtained using ≈57.5 markers (from primers Mse I-CAC/Eco RI-AAG) did not agree with the known taxonomic classification for this species. Additionally, a complementary table for fruit characters (morphological and °Brix) showed a wide range for wild genotypes, e.g. from 21-22 °Brix for ‘Tapón Blanco’ and ‘Guilanche’ genotypes, to 5.0-8.2 °Brix for xoconostles (acidic fruits). Even though there were some divergences with taxonomic classification, it is expected that both genetic and physicochemical… More >

Bucciarelli A, PV Hansen, VN Cambi

Phyton-International Journal of Experimental Botany, Vol.78, pp. 135-140, 2009, DOI:10.32604/phyton.2009.78.135

Abstract Pluchea microcephala (“cuatrocantos”, “lucera”) is a perennial native species from northern Argentina, Bolivia and NW of Perú, commonly used to treat digestive and hepatic disorders in humans. It grows in humid and saline soils, and bordering watercourses. Morphoanatomical characteristics of leaves, stems and capitula have been studied in order to determine the main diagnostic characters for the identification of this species. Light microscope observations were carried out on herbarium specimens, dissociated material, and serial transverse sections of restored herbarium material. Leaves are decurrent, anfistomatic, with eglandulate septate-flagellate trichomes and glandular trichomes with a entire biseriate stem. The mesophyll is isobilateral… More >

Bucciarelli A, VN Cambi, CB Villamil

Phyton-International Journal of Experimental Botany, Vol.77, pp. 283-295, 2008, DOI:10.32604/phyton.2008.77.283

Abstract Araujia hortorum (“tasi”) is a native species of South America, invading crops in several countries. It is used as food and in medicine due to its galactogenic properties. Morphoanatomical and micrographic characters of leaves, stems and roots were studied to determine diagnostic characters that allow its identification in the vegetative state. Stomata and palisade parenchyma indexes, stomata location, the proportion and characteristics of palisade and spongy parenchyma and the scarce quantity of idioblasts, resulted in the most relevant, differential characters. More >

Mamouni El Mamoun^1,*, Zennaki Mahmoud¹, Sadouni Kaddour¹

CMC-Computers, Materials & Continua, Vol.61, No.3, pp. 995-1008, 2019, DOI:10.32604/cmc.2019.08081

Abstract Using Support Vector Machine (SVM) requires the selection of several parameters such as multi-class strategy type (one-against-all or one-against-one), the regularization parameter C, kernel function and their parameters. The choice of these parameters has a great influence on the performance of the final classifier. This paper considers the grid search method and the particle swarm optimization (PSO) technique that have allowed to quickly select and scan a large space of SVM parameters. A comparative study of the SVM models is also presented to examine the convergence speed and the results of each model. SVM is applied to handwritten Arabic characters… More >

Tantasawat PA, K Lunwongsa, T Linthaisong, P Wirikitgul, N Campatong, N Talpolkrung, A Tharapreuksapong, O Poolsawat, A Khairum, A Sorntip, C Kativat

Phyton-International Journal of Experimental Botany, Vol.87, pp. 162-170, 2018, DOI:10.32604/phyton.2018.87.162

Abstract Genetic diversity and relatedness of 17 water primrose (Ludwigia hyssopifolia) accessions in Thailand were estimated using morphological characters and random amplified polymorphic DNA (RAPD) markers. Eight morphological characters were diverse among the accessions. However, some accessions could not be distinguished from one another based on these morphological characters alone. Unweighted pair-group arithmetic average (UPGMA) analysis of these characters separated these 17 accessions into 2 major clusters. Among the 5 RAPD primers used, a total of 68 fragments (150 to 2000 bp) were amplified, showing a polymorphism percentage of 80%. The polymorphic information content (PIC) among accessions varied from 0.31 to… More >

Chengcheng Li¹, Chan Zhou², Yunfei Yang¹

Phyton-International Journal of Experimental Botany, Vol.88, No.1, pp. 55-61, 2019, DOI:10.32604/phyton.2019.04577

Abstract Ramet modules in a certain population differ in terms of functions, which accounts for different contributions of the same ramets. Shortening heading time brings about different contributions of such modules. Ramets heading one after another were treated as a continuum in respective cohorts of Elymus cylindricus aged two. The reproductive ramets that head earlier were marked with tags every four days during the whole heading stage from the beginning to the end, after which all the labeled ramets at the maturity period were gathered. The results showed that, the height and biomass of ramets, the length and biomass of inflorescences,… More >

Mamouni El Mamoun^1,*, Zennaki Mahmoud¹, Sadouni Kaddour¹

CMC-Computers, Materials & Continua, Vol.60, No.1, pp. 55-66, 2019, DOI:10.32604/cmc.2019.06444

Abstract The paper discusses the segmentation of words into characters, which is an essential task in the development process of character recognition systems, as poorly segmented characters will automatically be unrecognized. The segmentation of offline handwritten Arabic text poses a greater challenge because of its cursive nature and different writing styles. In this article, we propose a new approach to segment handwritten Arabic characters using an efficient analysis of the vertical projection histogram. Our approach was tested using a set of handwritten Arabic words from the IFN/ENIT database, and promising results were obtained. More >