Qian J^1,2, Z Wang¹, Z Liu¹, W Kuang^1,2, CA Busso³

Phyton-International Journal of Experimental Botany, Vol.83, pp. 407-414, 2014, DOI:10.32604/phyton.2014.83.407

Abstract Understanding the changes in the total bud bank, and its contribution to community regeneration, in response to grassland enclosure to livestock grazing, is crucial for grassland management. Despite its importance, the contribution of the total bud bank and that of different bud types to community regeneration as a whole have been rarely explored. The vegetative offspring recruited from different bud types was investigated in grasslands having different enclosure durations to livestock grazing on a typical steppe of Inner Mongolia, China. Total vegetative offspring density was significantly higher (p<0.05) under continuous grazing than in fenced grasslands, but no significant changes were… More >

Blazquez FR^1,2,3, DV Peláez^1,3,4, RJ Andrioli¹, OR Elia^1,2,3

Phyton-International Journal of Experimental Botany, Vol.83, pp. 397-405, 2014, DOI:10.32604/phyton.2014.83.397

Abstract The interaction between woody and grass species in semi-arid rangelands of central Argentina was assessed through the evaluation of the impact of woody species on grass growth over a 2-y period. The study comprised two morpho-physiologically different woody species and two cool-season perennial grass species highly preferred by domestic livestock. The study involved the assessment of total green length (TGL) and number of green leaves (NGL) per tiller in grasses growing beneath the canopy of woody species and in open rangeland areas. Soil temperature, pH and water, nitrogen, phosphorus and organic matter content were estimated at the same study sites.… More >

Pérez Cuadra V, V Cambi

Phyton-International Journal of Experimental Botany, Vol.83, pp. 389-396, 2014, DOI:10.32604/phyton.2014.83.389

Abstract The halophytic community of Salitral de la Vidriera (Buenos Aires Province, Argentina) has species with different morphoanatomical functional traits. The aim of this study was to compare these traits in four species, two Asteraceae (Baccharis spartioides and B. tenella) and two Frankeniaceae (Frankenia juniperoides and F. pulverulenta). Leaves and stems were treated under traditional techniques for anatomical study. Leaves the of Asteraceae and F. pulverulenta were amphistomatic while in F. juniperoides they were hypostomatic. All species showed trichomes and only the Frankeniaceae had salt glands. The mesophyll was isolateral in Asteraceae, and dorsiventral in Frankeniaceae; the number of foliar vascular… More >

Franchini MC¹, AC F lemmer¹, LI Lindström¹, MA David², PA Fernandez³

Phyton-International Journal of Experimental Botany, Vol.83, pp. 379-388, 2014, DOI:10.32604/phyton.2014.83.379

Abstract The purpose of this study was to describe fruit development in two high oleic safflower (Carthamus tinctorius L.) cultivars during four growing seasons. Pericarp histogenesis, and dynamics of pericarp and seed dry weight and fruit water content were studied. The dynamics of the pericarp and seed growth was similar between cultivars and years. The pericarp completed its growth before the seed. Pericarp potential size was already set at anthesis as no cell division was observed at this time. Maximum pericarp dry weight was achieved 8 days after anthesis, when cell wall lignification concluded. At this time, twinned prismatic simetric crystals… More >

Pérez Cuadra V y PM Hermann

Phyton-International Journal of Experimental Botany, Vol.83, pp. 369-377, 2014, DOI:10.32604/phyton.2014.83.369

Abstract Species belonging to the tribe Salicornieae (Chenopodiaceae), called jumes, are rich in salts, reflecting its halophytic nature. The leaf and stem anatomy of Allenfolfea patagonica, Heterostachys olivascens and H. ritteriana were studied. The material, collected in the Salitral de la Vidriera located 30 km from Bahia Blanca (Buenos Aires, Argentina), was fixed, dehydrated, embedded and stained with traditional techniques for plant anatomy. The foliar abaxial epidermis of the three species had papillate cells, while the adaxial one, usually did not. The stomata were sunken in the abaxial epidermis of the three species, and of the adaxial one of A. patagonica;… More >

Usama K Abdel-Hameed

Phyton-International Journal of Experimental Botany, Vol.83, pp. 363-367, 2014, DOI:10.32604/phyton.2014.83.363

Abstract In Egypt there are two different species that are commercially marketed under the same trade name of Neem: one is Azadirachta indica A. Juss., and the other is Melia azedarach L. In this paper, leaf morphological characters (e.g., lamina architecture, stomatography, petiole and blade micromorphology) of both taxa were described and illustrated to aid in the identification and differentiation between the two misidentified taxa. The obtained results concluded that leaf morpho-anatomical characters will not only provide criteria for their correct taxonomic authentication, but would also serve as future standard data for the quality assessment of the pharmaceutical preparation of botanical… More >

Nurul Hafiza MR, KT Yong, N Osman, A Nasrulhaq-Boyce

Phyton-International Journal of Experimental Botany, Vol.83, pp. 353-361, 2014, DOI:10.32604/phyton.2014.83.353

Abstract The photosynthetic characteristics of eight Malaysian Hymenophyllaceae filmy ferns from shady habitats were investigated in this study. Chlorophyll content was highest in Trichomanes meifolium, followed by Cephalomanes obscurum, Hymenophyllum serrulatum, H. denticulatum, H. javanicum, H. acanthoides, H. exsertum and H. blandum, with values ranging from 3.3 to 8.6 mg/g fresh weight. Soluble protein content was remarkably high in H. serrulatum, with values of 53 ± 3.50 mg/g, followed by H. denticulatum, H. acanthoides, T. meifolium and the other species. Protein to chlorophyll ratios in the filmy ferns were low as expected, except for in H. serrulatum, H. acanthoides and H.… More >

Hermosillo-Cereceres MA¹, E Sánchez¹, E Muñoz-Márquez¹, A Guevara-Aguilar¹, M García-Bañuelos¹, D Ojeda-Barrios²

Phyton-International Journal of Experimental Botany, Vol.83, pp. 347-352, 2014, DOI:10.32604/phyton.2014.83.347

Abstract Selenium (Se) is an essential element for many organisms, although in high concentrations it may become toxic, leading to the generation of reactive oxygen species (ROS). In this study, bean plants received different application rates of Se (0, 10, 20, 40, 80, and 160 µM) in the form of selenite and selenate to evaluate the activity of the detoxifying enzymes of H₂O₂. The results indicated that the activity of these enzymes in bean plants depended on the chemical form of Se: selenite at rates of 20 µM or greater diminished biomass and yield, increasing the activity of superoxide dismutase (SOD).… More >

Boschi CL, M Palazuelos, E Gandolfo

Phyton-International Journal of Experimental Botany, Vol.83, pp. 341-346, 2014, DOI:10.32604/phyton.2014.83.341

Abstract Ginkgo biloba seed germination has hormonal inhibitors. Because of this, it has to be stratified in cold (4 °C) for 9 weeks before planting. This study evaluated other management by dipping prior to the sowing of seeds in solutions of 6-benzylaminopurine (BA) to obviate those nine-week waiting period and thus increase seedling growth period during the first year of cultivation. Dose experiments were performed combining BA and cold days. Treatments were two solutions with BA (2.5 ppm and 5 ppm), four periods of cold stratification (25, 31, 38 and 49 days) and two growth conditions:(a) in pots and (b) in… More >

Morales-Pérez E¹, EJ Morales-Rosales², O Franco-Mora², D de Jesús Pérez-López², A González-Huerta², E Urbina Sánchez³

Phyton-International Journal of Experimental Botany, Vol.83, pp. 333-340, 2014, DOI:10.32604/phyton.2014.83.333

Abstract The aim of this study was to assess different doses of gibberellic and salicylic acids for the production of flowers on Gerbera jamesonni after applications to their foliage or substrate under greenhouse conditions. The ten treatments (growth regulators) were evaluated in a 10 x 2 factorial experiment in a randomized complete block design with four replications. When F values were significant, the honestly significant difference test (HSD) at the 5% level of significance was used. The principal components analysis was also used to study the interrelationship among the ten treatments and the two forms of application (foliar or substrate). The… More >