Suarez Tapia A¹, MB Villamil¹, LJ Grabau²

Phyton-International Journal of Experimental Botany, Vol.83, pp. 71-81, 2014, DOI:10.32604/phyton.2014.83.071

Abstract Public demand for healthier foods and more sustainable food systems in the U.S. has triggered market prices and production of organic alternatives of major crops such as corn (Zea mays L.). Two cover crops and their interactions with tillage systems, N sources and N rates were studied to evaluate the possibility of using these agronomic practices to facilitate growing corn under organic management in Kentucky. A split-split plot design in a RCBD with four replications was evaluated in three environments (SP08, UKR08, UKR09). The main plot treatments were cover crops [hairy vetch, HV (Vicia villosa Roth) and rye (Secale cereale… More >

Rodríguez-González RE¹, JJ Paz Hernández¹, CG Iñiguez Monroy³, EO Rueda Puente², L Avendaño-Reyes¹, M Cruz-Villegas¹, CE Ail-Catzim¹, M Stoycheva⁴, R Koytchev Zlatev⁴, P Renganathan², AM García López¹

Phyton-International Journal of Experimental Botany, Vol.83, pp. 65-70, 2014, DOI:10.32604/phyton.2014.83.065

Abstract The aim of this study was to evaluate grain yield (RG) stability of some commercial wheat varieties, and to assess the stability of other parameters which are not typically measured for grain release purposes: performance of straw (RP), weight per hectoliter (PH), white belly (PB), harvest index (IC), grain protein (PG) and gluten strength (W). The evaluation was performed with the wheat varieties Cachanilla F-2000 (C), Yécora F-70 (Y) and Triguenio F-00 (TR), in El Valle de Mexicali, Baja California under four test environments, with the application of the Eberhart and Russell model. The study was developed during the 2010-2012… More >

Zhu XJ^†, YF Hu^†, X Chen, YH Wang, WP Fang, XH Li

Phyton-International Journal of Experimental Botany, Vol.83, pp. 57-63, 2014, DOI:10.32604/phyton.2014.83.057

Abstract The purpose of this study was to evaluate the antagonistic activity of two endophytic fungal strains, Pseudocercospora kaki and Penicillium sclerotiorum, isolated from the leaves of Camellia sinensis, against the rice blast pathogen Magnaporthe grisea. The inhibitory activity of the two endophytes against M. grisea in dual-culture was compared with that in monoculture. It was confirmed that the broth and its ethyl acetate extract of the dual-culture had a much stronger inhibition activity against M. grisea than the monocultures of P. kaki and P. sclerotiorum. The antagonism index of the broth and ethyl acetate extract from dual-culture to the mycelial… More >

Hernández-Castillo FD¹, RH Lira-Saldivar², G Gallegos-Morales¹, M Hernández-Suárez¹, S Solis-Gaona²

Phyton-International Journal of Experimental Botany, Vol.83, pp. 49-55, 2014, DOI:10.32604/phyton.2014.83.049

Abstract One of the most severe phytosanitary problems that face chili pepper producers in Mexico, and in many other parts of the world, is the disease known as "secadera" or wilting, caused by diverse pathogens. These patogens are mainly controlled with synthetic pesticides, thus causing a severe ecological impact, toxicity to humans, generation of plant resistance to fungicides, and increments of production costs. Because of this, it rises the need of finding more environmentally friendly options. We evaluated rhizospheric bacteria as a possible biological control of pepper wilt. We used three bacterial strains belonging to the Bacillus genera. These strains were… More >

Ruiz SE, AJ Cristóbal, RA Reyes, SJ Tun, RA García, AJ Pacheco

Phyton-International Journal of Experimental Botany, Vol.83, pp. 45-47, 2014, DOI:10.32604/phyton.2014.83.045

Abstract The antagonistic activity of native Bacillus subtilis strains from Yucatán peninsula soils were evaluated on two soilborne pathogens. Bacillus subtilis cbck36 and cbrf24 caused more than 60% inhibition of colony growth in Machophomina phaseolina. Cell-free culture filtrate of B. subtilis cbr24 were active against second- stage juveniles (J2) of Meloidogyne incognita (LC₅₀ 25.8% v/v). More >

García-Pereyra J¹, GN Aviña-Martínez¹, AA Orozco-Flores², OG Alvarado-Gómez³, M García-Montelongo⁴, G Alejandre-Iturbide⁵, JN Uribe-Soto⁵, H Medrano-Roldan⁶

Phyton-International Journal of Experimental Botany, Vol.83, pp. 37-43, 2014, DOI:10.32604/phyton.2014.83.037

Abstract It was analyzed the genetic variability of (1) three strains of a pathogenic fungi of the genus Metharhizium anisopliae var anisopliae, named MA22, MA24 and MA25, brand spesifik^®; (2) two strains of the product Metasaven^®, named MA1A and MAII; one strain of the product Metatron^®; and a native strain named MACN. This latter strain was directly isolated from the insect chapulin (Brachystola magna), from the farmer, corn plots in Durango, located in north central Mexico. Studies were conducted in the laboratory of molecular biology of the Technological Institute of the Valley of Guardiana in Durango, Mexico, from September 2008 to… More >

Astiz V¹, LF Hernández^2,3

Phyton-International Journal of Experimental Botany, Vol.83, pp. 27-36, 2014, DOI:10.32604/phyton.2014.83.027

Abstract The intra-plant pollen production in cultivated sunflower (Helianthus annuus L.) was quali- and quantitatively studied. Two modern self-pollinated, high oleic sunflower hybrids were grown during two consecutive seasons: 2009 in three planting dates, and 2010 in two planting dates. Two cross-pollinated varieties of sunflower, Hopi and Havasupai, were also studied to determine if an anomalous intracapitulum pollen gradient observed in preliminary studies could be a remnant character inherited from primitive genotypes. Pollen grains per flower (PGF), anther volume (AV), pollen grain volume (PGV) and pollen viability (PV) were measured in three capitulum sectors, external (ES), middle (MS) and internal (IS).… More >

Santander F¹, C Fredes¹, G Nuñez¹, G Casaubon², MI Espinoza², G Montenegro¹

Phyton-International Journal of Experimental Botany, Vol.83, pp. 17-26, 2014, DOI:10.32604/phyton.2014.83.017

Abstract Currently, the search for chemical markers related to the botanical origin of honey is an important issue because of its potential use as a complementary tool for melisopalinological analysis. The objective of this research was to compare the (1) volatile compounds of Quillaja saponaria Mol. (Fam. Quillajaceae) floral nectar with those of unifloral honey of this same species, and (2) volatile compounds in Q. saponaria honeys from the same geographical origin. For the identification and semiquantification of volatile compounds, Gas Chromatography with Mass Spectrometry (GC-MS) was performed. The nectar of Q. saponaria presented volatile compounds different from the compounds identified… More >

Bianchimano AS¹, MG Murray^2,3, ME Aztiria¹, B Montes^2,3, ML Calfuán², MI Prat¹

Phyton-International Journal of Experimental Botany, Vol.83, pp. 9-15, 2014, DOI:10.32604/phyton.2014.83.009

Abstract Chenopodium album is a very polymorphic, cosmopolitan, annual herb that grows spontaneously in modified soils in wasteland in the outlying urban zones of Bahía Blanca. In this city, the flowering period is mainly during February and March, which coincides with the highest concentrations of this pollen type in the atmosphere of the city. The objective of this study was to characterize the pollen grains of Chenopodium album, both morphologically and immunochemically, that were obtained from three different zones in the urban area of Bahía Blanca. Samples were collected from the three separate zones in the city that were far apart.… More >

Pascualides AL y NS Ateca

Phyton-International Journal of Experimental Botany, Vol.82, pp. 313-319, 2013, DOI:10.32604/phyton.2013.82.313

Abstract Crotalaria juncea L. (Fabaceae) is an annual herbaceous species native to India. Their seeds have polymorphism in the seed coat color and different seed sizes. Seeds were grouped according to their seed coat color into uniform (dark gray seeds) and variegated (brown mottled seeds), to evaluate the vigour of C. juncea seed morphotypes. They were also classified into small (< 5mm length) and big seeds (>5 mm length). The 1000 seed weight, germination percentage, length and seedling dry weight, electrical conductivity and field emergence were evaluated. The results showed that uniform seeds had greater weight than those variegated of the… More >