A.L. Estebenet, P.R. Martín

BIOCELL, Vol.26, Suppl.S, pp. 83-89, 2002

Abstract This article has no abstract. More >

Shi G¹, ZY Liu¹, T Baoyin¹, J Sun², JJ Duan³, XL Li³, GF Yang⁴

Phyton-International Journal of Experimental Botany, Vol.87, pp. 236-241, 2018, DOI:10.32604/phyton.2018.87.236

Abstract Plant functional traits and their effects on rangeland ecosystem function have received much attention by ecologists. However, the importance of functional traits and the interactive effects of grazing exclusion and climate are poorly understood. This study, therefore, aimed to analyse the response of Leymus chinensis functional traits in long-term grazing exclusion in different habitats (rainless typical steppe and rainy meadow steppe). This study showed that although the sensitivity and variability of different traits were similar in two steppe habitats, phenotypic plasticity of L. chinensis in meadow steppe was significantly higher than typical steppes. With the increased degree of plasticity, the… More >

Hernández LF^1,2, PM Bellés³, MA Bidegain^4,5, PD Postemsky⁴

Phyton-International Journal of Experimental Botany, Vol.87, pp. 198-208, 2018, DOI:10.32604/phyton.2018.87.198

Abstract Absence or underdevelopment of sunflower fruits come usually from failure in fertilization, stresses as well as physiological and morphological defects in the ovary. Thigmomorphogenesis has never been included as a possible cause. We have previously shown that a 2-3 day fertilization shift can occur between neighboring florets in the sunflower capitulum. It is proposed here that those ovaries with advanced fertilization can generate a significant radial and axial compressive stress on ovaries with delayed fertilization. This mechanical stimulus could be strong enough to trigger a thigmo response that affects further ovary development. In vivo tests were performed, isolating ovaries by… More >

Xin ZM^1,2, MH Liu², Q Lu^1,3, CA Busso⁵, YJ Zhu^1,3, Z Li², YR Huang², XL Li2, FM Luo², F Bao¹, JQ Qian^4*, YH Li^1,3*

Phyton-International Journal of Experimental Botany, Vol.87, pp. 144-155, 2018, DOI:10.32604/phyton.2018.87.144

Abstract Leaf δ¹³C is widely used to explain plant strategies related to resource availability in different environments. However, the coupled response of leaf δ¹³C to precipitation and temperature as well as the relationship between leaf δ¹³C and leaf traits remain unclear. The leaf δ¹³C and its relationship with leaf traits [leaf size (LS), leaf length (LL), leaf width (LW), leaf length to width ratio (L:W), specific leaf area (SLA) and mass-based leaf nitrogen concentration (N_mass)] were investigated on the dominant shrub species Nitraria tangutorum Bobr. in the arid region (Dengkou and Minqin) of northwestern China under the simulated increasing precipitation (PGS)… More >

Han DY^1,2, YF Yang²

Phyton-International Journal of Experimental Botany, Vol.87, pp. 113-122, 2018, DOI:10.32604/phyton.2018.87.113

Abstract Rapid and precise assessment of biodiversity is a central issue in conservation biology and biodiversity science. Higher taxonomic units and life form-based morphospecies were utilised to assess plant diversity patterns at the habitat scale in temperate meadow steppe, Songnen Plain, China. Patch area, taxonomic composition (families and genera) and life form (based on Raunkiaer’s life forms, and stem and root growth forms) were recorded in five communities. Taxonomic unit-based hierarchical diversity indices (HDI) and life form-based hierarchical diversity indices (HLDI) were calculated. Twenty-six families, 67 genera, and 87 species were recorded in the five communities. HDI and HLDI were significantly… More >

Rodrigues Costa A^1,2, PS Pereira³, MK Alves de Sousa^1,2, FC Rodrigues⁵, VR Duarte Mendes¹, KR Rodrigues Lima¹, L Marivando Barros^1,4, CM Rocha Sousa¹, MS Alcântara¹, AB Leite Cavalcante⁴, R Cruz Macedo⁵, JP Kamdem³, AE Duarte^1,2

Phyton-International Journal of Experimental Botany, Vol.87, pp. 79-86, 2018, DOI:10.32604/phyton.2018.87.079

Abstract The species Rhaphiodon echinus, known as betonica or creeping mint, is considered an infesting plant species, typical of the caatinga biome. Morphoanatomy is a very important tool to study the structure of plants, both its external and internal morphology, opening the knowledge about the production of secondary metabolites. These compounds are of great importance for scientific research, which may present themselves as the best antioxidants. Taking into account a lack of data in the literature on the essential oil of R. echinus, this study aimed to demonstrate its antioxidant activity and toxicity. In order to test this hypothesis, tests were… More >

Chel-Guerrero LD¹, R Gómez-Cansino², SL Gúzman-Gutierrez³, MG Campos-Lara⁴, E Saury-Duch¹, F Díaz de León Sánchez⁵, R Reyes-Chilpa⁶, JA Mendoza-Espinoza⁷

Phyton-International Journal of Experimental Botany, Vol.87, pp. 68-71, 2018, DOI:10.32604/phyton.2018.87.068

Abstract The objective of this study was to investigate extracts from the peels of Annona squamosa L. (purple sugar apple), Annona reticulata L. (custard apple), Chrysophyllum cainito L. (green star apple), and Melicoccus bijugatus Jacq. (mamoncillo), as potential sources of anti-HIV-1 agents. Methanolic extracts from the peels of the aforementioned tropical fruits were obtained by maceration. Antiviral activity was evaluated through HIV-1 RT inhibition by extracts, using a non-radioactive immuno/colorimetric assay (Lenti RT Activity Assay, Cavidi Tech). Assay was performed according to the protocol provided by the manufacturer. Extracts from the peels of A. squamosa, A. reticulata, and C. cainito showed… More >

Ithurrart LS^1,2, CA Busso^1,2, YA Torres^1,3, DV Peláez^1,2,3, H Giorgetti⁴, G Rodríguez⁴, ML Ambrosino^2,5

Phyton-International Journal of Experimental Botany, Vol.87, pp. 51-59, 2018, DOI:10.32604/phyton.2018.87.051

Abstract Plant competition for soil resources is common in semiarid rangelands. Plants have various, alternative mechanisms to deal with soil resource acquisition. They include (1) length, weight and proliferation of roots, (2) root length density, and (3) root colonization by arbuscular mycorrhiza. In rangelands of Argentina, plants are exposed to herbivory after natural fires. As a result, knowledge on how these disturbances impact root traits is important for outlining guidelines focused on rangeland management and improvement. Our aim was to analyze the effects of defoliation after a controlled burning on root traits (1) to (3) on two preferred (Poa ligularis and… More >

Díaz-López E¹, A Morales-Ruíz¹, A Olivar-Hernández¹, HR Bravo-Delgado², JM Loeza-Corte³

Phyton-International Journal of Experimental Botany, Vol.87, pp. 18-24, 2018, DOI:10.32604/phyton.2018.87.018

Abstract Sunflower is a crop that is used as ornamental, oleaginous, forage, and currently as a bioremediation plant, of hard water affected soils. For this reason, the main objective of this investigation was to study the effect of potassium fertilization on yield under field conditions, and the effect of gibberellic acid (GA₃), at postharvest of inflorescences. Two experiments were established, under field and laboratory conditions. In the field experiment, four levels of potassium, 0, 50, 100 and 150 kg/ha were evaluated, under a randomized complete block design and four replicates (4×4) = 16 experimental units. The variables evaluated were agronomic and… More >

KIVANÇ ERGEN^*, MUHAMMET BEKTAŞ^**, SINA GÖKÇE^**, RÜSTEM NURTEN^**

BIOCELL, Vol.31, No.1, pp. 61-66, 2007, DOI:10.32604/biocell.2007.31.061

Abstract Eukaryotic elongation factor 2 (eEF-2) can undergo ADP-ribosylation in the absence of diphtheria toxin. The binding of free ADP-ribose and endogenous transferase-dependent ADP-ribosylation were distinct reactions for eEF-2, as indicated by different findings. Incubation of eEF-2 tryptic fragment 32/33 kDa (32F) with NAD was ADP-ribosylated and gave rise to the covalent binding of ADP-ribose to eEF-2. 32F was revealed to be at the C-terminal by Edman degradation sequence analysis.
In our study, the elution of 32F from SDS-PAGE was ADP-ribosylated both in the presence and absence of diphtheria toxin. These results suggest that endogenous ADP-ribosylation of 32F might be related… More >