Castillo-Aguilar C de la C¹, JJ Zúñiga-Aguilar², AA Guzmán-Antonio², R Garruña³

Phyton-International Journal of Experimental Botany, Vol.86, pp. 199-204, 2017, DOI:10.32604/phyton.2017.86.199

Abstract The Habanero pepper (Capsicum chinense) is intensively cultivated in the Yucatan peninsula, México. Because of adverse environmental conditions, it required seeding in germination trays, from which six-week-old seedlings were transplanted to the soil. Adequate nursing and fertilization programmes were made to improve health and vigour before seedlings transplanting. During seed germination, we investigated the effects of inoculation with four plant growth-promoting rhizobacteria (PGPR) on growth, nutrient uptake and gas exchange of 8-week-old Capsicum chinense plants. Inoculation was made with Pseudomonas sp. -P61-, Pseudomonas sp. -A46-, Bacillus pumillus -R44-, and Paenibacillus polymyxa-BSP1.1-. The BSP1.1 strain produced the highest increase in plant… More >

Guerrero-Prieto VM¹, DI Berlanga-Reyes², JL Jacobo-Cuellar¹, C Guigón-Lopez³, DL Ojeda-Barrios⁴, GD Ávila-Quezada⁴, A Núñez-Barrios⁴, OA Hernández-Rodríguez⁴

Phyton-International Journal of Experimental Botany, Vol.86, pp. 74-78, 2017, DOI:10.32604/phyton.2017.86.074

Abstract Calcium content and damage severity of Penicillium expansum because of its high concentration on “Red Delicious” postharvest apples were evaluated during the 2012-2013 winter in Cuauhtemoc, Chih. Mexico. Fruit weight, diameter, total soluble solids, pulp firmness and starch index were also determined. Penicillium expansum was inoculated into two wounds of eight mm diameter and 10 mm depth, on a total of 20 apple fruits per treatment. The inoculum was 0.2 mL of a suspension containing 1×10⁸ conidia/mL. After inoculation, apple fruit was stored at 0 °C and 90% relative humidity during five weeks. Treatments were: apple fruit with high (2.28… More >

Wang XG¹, Wuyunna^1*, CA Busso², YT Song¹, FJ Zhang¹, GW Huo¹

Phyton-International Journal of Experimental Botany, Vol.87, pp. 123-132, 2018, DOI:10.32604/phyton.2018.87.123

Abstract Chemical elements, such as carbon (C), nitrogen (N) and phosphorus (P), are major limiting nutrients in arid and semiarid grasslands and their stoichiometry (C:N:P) is a very important ratio to determine. In addition, it is critical to understand how plant stoichiometry responds to multiple environmental factors at the species level. In this study, we conducted a greenhouse experiment to investigate the effects of salt stress (4 g NaCl/kg soil), drought (35% of the soil water holding capacity) and N addition (10 g N/m²), as well as their interactions, on C, N and P concentrations and C:N:P ratios in two dominant… More >

Barresi O^1,2, VM Chiocchio^1,2, RS Lavado²

Phyton-International Journal of Experimental Botany, Vol.87, pp. 14-17, 2018, DOI:10.32604/phyton.2018.87.014

Abstract Previous studies in soils of the Pampas region indicate the prevalence of calcium phosphates within the very complex mix of phosphorus (P) compounds in the soils. We studied the changes in P fractions in a punctual situation in the Pampas region. The sampling was carried out in a farm located near the city of Junín (-34.585; -60.9589) and the soil was Junín series Typic Hapludoll. The farm was devoted to grazing and sporadic crops, but from the last 30 years changed to continuous agriculture. At no time fertilization matched nutrients removal by crops. The soil P fractions were determined using… More >

Huabing Xu^1,†, Xiaojuan Liu^1,†, Zhiping Mei¹, Jinchun Lin¹, Stephan Aaron² and Hong Du^1,*

Phyton-International Journal of Experimental Botany, Vol.88, No.3, pp. 335-348, 2019, DOI:10.32604/phyton.2019.06880

Abstract Given the central role of light in the algal photosynthesis, respiration, cell division, growth and the accumulation of value products, the effects of light-emitting diodes (LEDs) light wavelengths (blue, white, red and green) were studied in Scenedesmus obliquus. Biomass, residual nutrient amount, soluble protein, astaxanthin and reactive oxygen species, superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) activity were analyzed to determine the effects of different monochromatic light wavelengths via biochemical methods. The results showed that blue light wavelength is the optimal light wavelength for phosphorus removal efficiency and the accumulation of biomass and astaxanthin in S. obliquus. Meanwhile, high… More >

Dhouha Belhaj Sghaier¹, Insaf Bankaji¹, Sylvia Pedro², Isabel Caçador², Noomene Sleimi^1,*

Phyton-International Journal of Experimental Botany, Vol.88, No.3, pp. 239-252, 2019, DOI:10.32604/phyton.2019.06887

Abstract The lack of knowledge of plant tolerance and differential response to aluminum (Al) encouraged many researchers, in the last decade, to elucidate Al toxicity and tolerance mechanisms. The current study reported the impact of Al, a toxic element with negative effects on plant growth and development, in halophytic plant Tamarix gallica. Plants were subjected to different Al concentrations (0, 200, 500 and 800 μM) with or without NaCl (200 mM) supplementation. Growth, photosynthesis and mineral content were assessed. Al stress had a significant decrease on shoots’ biomass production between 19 to 41%, and a little variation on chlorophyll content and… More >

Yongren Wu^∗, Sarah Cisewski^∗, Barton L. Sachs^†, Hai Yao^∗,†,‡

Molecular & Cellular Biomechanics, Vol.10, No.2, pp. 159-182, 2013, DOI:10.3970/mcb.2013.010.159

Abstract This study examines the effects of cartilage endplate (CEP) calcification and the injection of intervertebral disc (IVD) cells on the nutrition distributions inside the human IVD under physiological loading conditions using multiphasic finite element modeling. The human disc was modeled as an inhomogeneous mixture consisting of a charged elastic solid, water, ions (Na⁺ and Cl⁻), and nutrient solute(oxygen,glucose and lactate) phases. The effect of the endplate calcification was simulated by a reduction of the tissue porosity (i.e., water volume faction) from 0.60 to 0.48. The effect of cell injection was simulated by increasing the cell density in the nucleus pulposus… More >

Y. González^∗, F. Nieto^∗, M. Cerrolaza^∗,†

Molecular & Cellular Biomechanics, Vol.10, No.1, pp. 67-84, 2013, DOI:10.3970/mcb.2013.010.067

Abstract It is a well-known fact that computational biomechanics and mechanobiology have deserved great attention by the numerical-methods community. Many efforts and works can be found in technical literature. This work deals with the modeling of nutrients and their effects on the behavior of intervertebral discs. The numerical modeling was carried out using the Boundary ELement Method (BEM) and an axisymmetric model of the disc. Concentration and production of lactate and oxygen are modeled with the BEM. Results agree well enough with those obtained using finite elements. The numerical efforts in the domain and boundary discretizations are minimized using the BEM.… More >