Bonamico¹ NC, MG Balzarini², AT Arroyo², MA Ibañez¹, DG Díaz³, JC Salerno³, MA Di Renzo¹

Phyton-International Journal of Experimental Botany, Vol.79, pp. 31-38, 2010, DOI:10.32604/phyton.2010.79.031

Abstract Resistance to Mal de Río Cuarto (MRC) disease in maize (Zea mays L.) is important in Argentina because the crop area involves a wide region where the disease is endemic. Molecular marker-assisted selection could be used as an additional selection tool to enhance precision of the genotype selection for resistance. It demands the identification of informative markers. Microsatellite (SSR) markers linked to gene(s) associated with resistance to MRC have been reported from previous QTL analyses. These analyses have been made on linkage maps derived from a relatively early mapping population. In advanced populations, where highly distinct genotypes are easily classified,… More >

Ahmad¹ S, S Gul², AKK Achakzai², M Islam¹

Phyton-International Journal of Experimental Botany, Vol.79, pp. 19-23, 2010, DOI:10.32604/phyton.2010.79.019

Abstract Seedling growth and development of Seriphidium quettense were examined under water stress (WS) and non-water stress (NWS) conditions. Seedlings were grown in pots to investigate their response to NWS conditions. Impact of WS on seedling growth was assessed in pre-existing plants grown under a semi-arid, natural environment. Seedling growth attributes were recorded on a monthly basis. Seedling growth exhibited a significant positive response under NWS conditions. Length of the main root axis at the first leaf emergence stage was 5.69 cm under NWS conditions; however, it was 4.8 cm in the natural environment (WS). At the end of the growing… More >

De la Cruz-Lázaro E¹, G Castañón-Najera², NP Brito-Manzano¹, A Gómez-Vázquez¹, V Robledo-Torres³, AJ Lozano del Río³

Phyton-International Journal of Experimental Botany, Vol.79, pp. 11-17, 2010, DOI:10.32604/phyton.2010.79.011

Abstract Estimation of genetic parameters using diallel crosses experiments aids to objective decision making in plant breeding programs. The objectives of this study were to estimate heterosis, the general combining ability (GCA) of eight tropical maize populations, and the specific combining ability (SCA) of 28 crosses. The populations evaluated were: population 21, 22, 23, 25, 32, 43, 49 and the commercial variety VS 536. The Griffing method 2 design was utilized to estimate GCA and SCA effects, on a complete randomized block design with two replications, at two planting dates. The diallel analysis showed significant differences (p≤0.01 and p≤0.05) among planting… More >

Lovey¹ RJ, P Perissé², C V ieyra³, JC Coraglio³

Phyton-International Journal of Experimental Botany, Vol.79, pp. 5-10, 2010, DOI:10.32604/phyton.2010.79.005

Abstract Cologania broussonetii (Balb.) DC. (Fabaceae) grows from the Bolivian eastern Andes to the north west of Argentina, Cordoba hills and San Luis Province. It is recognized as a native forage. The objectives of this study were to characterize the seed, the germination and the seedling of C. broussonetii. Seed structure was characterized through free hand sections and analyzed with optical and stereoscopic microscopy. The germination assay treatments were: (1) intact non-scarfied seeds at 25 °C constant, (2) scarified seeds at 25 °C constant, (3) intact non-scarified seeds at 20-30 °C alternating, and (4) scarified seeds at 20-30 °C alternating. Results… More >

Manilal¹ A, S Sujith², J Selvin³, C Shakir⁴, G Seghal Kiran⁵

Phyton-International Journal of Experimental Botany, Vol.78, pp. 161-166, 2009, DOI:10.32604/phyton.2009.78.161

Abstract The antibacterial property of the red algae, Falkenbergia hillebrandii (Born) collected from the southwest coast of India (Indian Ocean) was evaluated against three multidrug resistant human pathogens. Four different solvents: ethyl acetate, dichloromethane, methanol and phosphate buffer saline (PBS) were used with this purpose. Dried samples extracted with methanol showed broadest and highest antimicrobial activity when compared to other solvents. However, PBS extract showed no antibacterial activity. The highly active compounds red alga, F. hillebrandii were fractionated and purified using different chromatographic systems, including reverse phase HPLC and GCMS. The analysis revealed that the most abundant metabolite was the oleic… More >

Diniz SPSS, RC Oliveira

Phyton-International Journal of Experimental Botany, Vol.78, pp. 155-160, 2009, DOI:10.32604/phyton.2009.78.155

Abstract The effects of fusaric acid, a mycotoxin produced by Fusarium sp, were investigated in relation to its action on corn seedlings. The mycotoxin inhibited the development of corn seedlings at 0.2 mM, causing root length reduction. Anatomically, alterations were only visible from 0.5 mM fusaric acid, directly influencing the cell differentiation process. Precocious differentiation reduces the elongation region. This explains (1) that root shortening is morphologically visible, and (2) the differentiation of a great number of lateral roots nearby the apex, which can be seen in longitudinal cuts. More >

Zhang¹ WD, DS Liu², JC Tian^1*, FL He¹

Phyton-International Journal of Experimental Botany, Vol.78, pp. 147-154, 2009, DOI:10.32604/phyton.2009.78.147

Abstract Soil arsenic contamination becomes a potential agricultural and environmental hazard worldwide, and has been a serious problem for safe food production. A field experiment on soil contamination was conducted on four wheat varieties (Jimai, Gaoyou, Weimai and Wennong) in Eastern China, using 50 or 100 mg arsenic/kg soil. Biomass production and yield components were determined and arsenic concentrations were measured in plant tissues. Differential arsenic effects on wheat varieties were determined at maturity. Results showed that addition of arsenic significantly (p<0.05) reduced root, stem and spike dry weight and yield components, which resulted in the decrease of grain yield per… More >

Montenegro G, F Salas, RC Peña, R Pizarro

Phyton-International Journal of Experimental Botany, Vol.78, pp. 141-146, 2009, DOI:10.32604/phyton.2009.78.141

Abstract The detection of phenolics, flavonoids and related compounds by HPLC in extracts of unifloral honey of Quillay (Quillaja saponaria) showed phenolic compounds such as caffeic, coumaric and salicylic acids, the flavanone naringenin and the flavonol kaempferol. These extracts showed antibacterial activity against Pseudomonas aureginosa, Escherichia coli, Staphylococcus typhi, S. aureus, Streptococcus pneumoniae type β, and Vibrio cholerae, and antifungal activity against Candida albicans. Additionally, some aroma and decomposition compounds were identified in the ethanol extract. 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 >

Robles-Hernández^1* L, AC González-Franco¹, SO Guy², WC Chun²

Phyton-International Journal of Experimental Botany, Vol.78, pp. 129-134, 2009, DOI:10.32604/phyton.2009.78.129

Abstract This study presents the effect of Liquid Compost Factor (LCF) seed treatments on plant height in greenhouse trials, and plant density, plant height and seed yield of chickpea in field conditions. The greenhouse trials were organized in a randomized block design, while in field experiments were established in a factorial complete randomized block design conducted in Moscow and Genesee, Idaho, USA locations during 2003 and 2004. In the greenhouse, LCF 1:64 had the highest plant growth, and was statistically similar to LCF 1:110, LCF 1:128 and LCF 1:140, but different to the non-treated control. The orthogonal contrasts of LCF treatments… More >