Zhou C^1,2, C Busso³, J Liu¹, YG Yang¹, Y Sun¹, YZ Fang¹, QQ Zhang¹, YB Zhou^1,4, YN Wang^1,4, Z Zhang^4,5, ZW Wang⁶, YF Yang²

Phyton-International Journal of Experimental Botany, Vol.85, pp. 125-130, 2016, DOI:10.32604/phyton.2016.85.125

Abstract The objective of this study was to analyze the relationships between total aboveground plant biomass versus altitude, latitude, longitude, mean annual temperature, mean annual precipitation, and species diversity. Simple linear regression analysis was used to study these relationships. Results showed that altitude was significantly, positively (R²= 0.038, P<0.01) related with total plant aboveground biomass. Meanwhile, when longitude (R²= 0.124, P<0.001) and latitude (R²= 0.221, P<0.001) increased, total aboveground biomass decreased. The relationship between biomass and mean annual precipitation was significantly, positively linear (R²= 0.149, P<0.001). Mean annual temperature was significantly, negatively correlated with biomass (R²= 0.145, P<0.001). The More >

Vital López L, MA Cruz Hernández, S Fernández Dávila, A Mendoza Herrera

Phyton-International Journal of Experimental Botany, Vol.84, No.1, pp. 233-243, 2015, DOI:10.32604/phyton.2015.84.233

Abstract Cultivated surfaces of genetically modified (GM) crops increased year by year, becoming in 2012 more extensive in developed than in industrialized countries. Furthermore, it has been postulated that the plant is which leads to the selection of the microorganisms on its root exudates, creating specific conditions which in turn regulate the specific microbial structure of each plant. In this study, our main objective was to examine whether the introduction of transgenic maize herbicide-tolerant plants will impact the microbial structures that inhabit at the rhizosphere and rhizoplane with respect to conventional hybrid maize plants. Bacterial populations More >

Hu FL^1,2, B Liu^1,3, ZM Liu^1,3, YT Fang^1,3, CA Busso⁴

Phyton-International Journal of Experimental Botany, Vol.84, No.1, pp. 209-221, 2015, DOI:10.32604/phyton.2015.84.209

Abstract Grasslands are one of the most widespread landscapes worldwide, covering approximately one-fifth of the world’s land surface, where grazing is a common practice. How carbon storage responds to grazing in steppes remains poorly understood. We quantified the effects of grazing on community composition and species diversity, and carbon storage in two typical grasslands of northeastern China, one in Horqin and the other one in Hulunbeier. In both grasslands, grazing did not influence plant species diversity. However, it substantially decreased aboveground carbon by 31% and 54% in Horqin and Hulunbeier, respectively. Fenced and grazing treatments showed More >

Morales-Nieto CR¹, C Avendaño-Arrazate², A Melgoza-Castillo¹, M Martinez-Salvador³, P Jurado-Guerra⁴

Phyton-International Journal of Experimental Botany, Vol.84, No.1, pp. 190-200, 2015, DOI:10.32604/phyton.2015.84.190

Abstract Plains bristlegrass (Setaria macrostachya Kunth) is a native grass with forage value. However, due to the lack of grazing management practices, populations and thus genetic diversity, have been reduced. Morphological and genetic variability were analyzed on 44 populations of plains bristlegrass in the State of Chihuahua. Plants were transplanted in a common area under natural conditions. Two years later, morphological characterization was evaluated measuring nine variables, and genetic variability using AFLP molecular markers. The principal components analysis (PC) showed that the three first principal components explained 73.74% of the variation. The variables with the greatest contribution… More >

Avendaño-Arrazate CH¹, L Iracheta-Donjuan¹, JC Gódinez-Aguilar², P López-Gómez¹, A Barrios-Ayala³

Phyton-International Journal of Experimental Botany, Vol.84, No.1, pp. 148-162, 2015, DOI:10.32604/phyton.2015.84.148

Abstract The agave papalote (Agave cupreata Trelease) which is endemic to the Guerrero state, Mexico, is propagated exclusively by seed, but it is overutilized and knowledge of its diversity is needed for its protection. Therefore, the study aimed to determine the morphological variation in wild and cultivated populations of Agave cupreata in five areas of Guerrero. Ninety one characters were evaluated in situ, and only 51 qualitative and quantitative morphological characters of the plant, leaf spine, flower, fruit, seed and flower stalk were selected. The work was carried out in five different altitudinal zones, according to the level of… More >

Martínez ME¹, JM Lesher G², G Castañón N², E de la Cruz L¹, C Zapata H²

Phyton-International Journal of Experimental Botany, Vol.82, pp. 209-214, 2013, DOI:10.32604/phyton.2013.82.209

Abstract Nanche (Byrsonima crassifolia (L.) H.B.K.) grows in the southeastern region of the Mexican republic under both wild and semi-cultivated forms. Despite the importance of the fruit of this tree, only one paper at the molecular level has been published in Mexico, and possibly in America, to date. For this reason, the purpose of this research was to study the genetic variability of nanche trees that grow under both wild and semi-cultivated conditions in the state of Tabasco, Mexico. Molecular determinations were carried out in the Laboratorio de Genómica of the División Académica de Ciencias Biológicas (DACBiológicas),… More >

Bazai ZA¹, RB Tareen¹, AKK Achakzai¹, H Batool²

Phyton-International Journal of Experimental Botany, Vol.82, pp. 69-74, 2013, DOI:10.32604/phyton.2013.82.069

Abstract The data collection approach called Participatory Rural Appraisal (PRA) was used in five villages: Killi Tor Shore; Medadzai; Ghunda; Kala Ragha, and Killi Shaban. Up to five groups were sampled in each village, comprising a total of 17 villages within the Zarghoon Juniper ecosystem. This area is rich both historically and culturally for using medicinal plants, mostly by women (60%). In this study, 26 species of medicinal plants fit in 20 genera and 13 families. They are used by aboriginal people via the indigenous knowledge they have for the treatment of many diseases. About 60,… More >

Escalante-González JG¹, EA García-Zambrano², A Gutiérrez-Diez², RE Vázquez-Alvarado², JA Torres-Castillo², SR Sinagawa-García², F Zavala-García², J Martínez-de la Cerda², C Gallegos-Vázquez³, JI García-Zambrano⁴

Phyton-International Journal of Experimental Botany, Vol.81, pp. 143-148, 2012, DOI:10.32604/phyton.2012.81.143

Abstract The objective of this research was to increase the genetic diversity of the Nopal Germplasm Bank of the FAUANL using RAPD molecular markers to estimate the genetic diversity of 15 accessions of cactus pear from molecular markers recorded in the Bank. DNA extraction was performed by the method of cellular ruptor using FastDNA^® Kit. Performance measurement of DNA was carried out through Picoflour. It was observed that the DNA concentrations ranged from 74.91 ng/µL to 12.32 ng/uL. Twelve primers were used to generate from 1 to 5 bands per primer with a molecular weight ranging from More >

Velázquez-Sepúlveda I, MC Orozco-Mosqueda, CM Prieto-Barajas, G Santoyo

Phyton-International Journal of Experimental Botany, Vol.81, pp. 81-87, 2012, DOI:10.32604/phyton.2012.81.081

Abstract Rhizospheric soil is one the largest reservoirs of microbial genetic diversity. Before conducting a large-scale metagenomic analysis of an environment, such as a rhizospheric soil, it is necessary to perform a pre-screening of the resident genetic diversity. In this study, we analyzed the bacterial diversity associated with the rhizosphere of wheat plants by PCR amplification, construction of a library and sequencing of 16S rDNA genes. Thirty OTUs were detected, including the Classes Alfaproteobacteria, Betaproteobacteria, Deltaproteobacteria, Gammaproteobateria, Actinobacteria, Bacilli, Clostridia and Uncultivable bacteria. Within the Gammaproteobacteria class, the genera Pseudomonas, Stenotrophomonas and Bacillus were the most abundant, since More >

Rojas-Herrera R¹, M Zamudio-Maya¹, L Arena-Ortiz², RC Pless³, A O’Connor-Sánchez⁴

Phyton-International Journal of Experimental Botany, Vol.80, pp. 231-240, 2011, DOI:10.32604/phyton.2011.80.231

Abstract Mexico counts among the five countries with the highest biodiversity in the world. In the Yucatán Peninsula, there are aquatic ecosystems with a very special microbial diversity. These ecosystems are essential for the ecological equilibrium of the region, and are seriously threatened by human activities. Access and knowledge of the microbial resources of these environments have an enormous scientific interest, and could potentially result in biotechnological products which could lead to more efficient and environmentally friendly processes; it could also offer a full arsenal of microorganisms and/or novel molecules to the local and world industry… More >