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  • Open Access

    ARTICLE

    Application of the random forest algorithm for predicting the persistence of seed banks in the Horqin Sandy Land, China

    Tang Y1, SS Jin2

    Phyton-International Journal of Experimental Botany, Vol.87, pp. 280-285, 2018, DOI:10.32604/phyton.2018.87.280

    Abstract Persistent seed banks have been detected in the Horqin Sandy Land, China using experimental methods. In this study, we used seed traits (i.e. seed mass and seed shape) to predict the persistence of seed banks using the random forest algorithm. The results showed that the mean decrease in accuracy for seed mass and seed shape was 18.26 and 9.90, respectively, suggesting that seed mass was a better predictor than seed shape. With increasing seed mass, the log of P (where P is the ratio of the number of votes selecting existence of a persistent seed… More >

  • Open Access

    ARTICLE

    Microbial inoculation of Parkinsonia praecox (Ruiz & Pav. ex Hook.) Hawkins for ecological restoration

    Álvarez AS1, DR Pérez2

    Phyton-International Journal of Experimental Botany, Vol.87, pp. 274-279, 2018, DOI:10.32604/phyton.2018.87.274

    Abstract The use of microbial inocula for the restoration of severely degraded arid environments is of great interest. This is because there is a presumption that growth-favoring microorganisms can facilitate the establishment of seedlings by increasing their ability to withstand both the stress of transplantation in the case of nursery seedlings, and the extreme conditions for natural establishment imposed by the scarce, random and variable rainfall. In this work we analyze the “slenderness index”- the height of the plant divided by its diameter at the height cotyledon node- to analyze the effect of treatments with microorganisms… More >

  • Open Access

    ARTICLE

    Germination of Oenothera odorata, endemic ruderal Onagraceae from Argentina

    Chichizola GA, AE Rovere, SL Gonzalez

    Phyton-International Journal of Experimental Botany, Vol.87, pp. 265-273, 2018, DOI:10.32604/phyton.2018.87.265

    Abstract The Onagraceae are a well-defined family of flowering plants much used by man. Many representatives of this group, which contains 75 species belonging to 8 genera, are indigenous to Argentina, and 19% of these are commonly found throughout the country. Many Onagraceae are ruderal and promote the subsequent establishment of other species, thus contributing to the restoration of degraded areas. Since it is important to know the characteristics of seeds to be used in restoration projects, we studied the basic germination physiology of Oenothera odorata Jacq., a ruderal plant indigenous to Argentina. Material was collected from… More >

  • Open Access

    ARTICLE

    Pre-germination treatments on Senna arnottiana and Senna kurtzii: key contributions for restoration initiatives in Payunia, Patagonia, Argentina

    Turuelo NM1, DR Pérez2

    Phyton-International Journal of Experimental Botany, Vol.87, pp. 260-264, 2018, DOI:10.32604/phyton.2018.87.260

    Abstract In arid and semi-arid ecosystems, increasing and irreversible degradation in areas of high conservation value has prompted the search for various solutions, such as rehabilitation and ecological restoration. To implement these strategies, it is essential to solve critical issues affecting the establishment of plants in the field and the production of seedlings in nursery gardens. In the present work, the following pre-germination treatments were evaluated for the species Senna arnottiana and S. kurtzii, endemic to the Patagonian steppe (Payunia): (1) Immersion in water at 80 °C for 5 minutes; (2) Immersion in water at 80 °C for… More >

  • Open Access

    ARTICLE

    Does seed aggrupation and substrate type affect the germination on three native species of Durango, Mexico?

    Sánchez J1, J Sáenz Mata1, J Flores3, E Jurado2, E Estrada Castillón2, O Aguirre2, G Muro1

    Phyton-International Journal of Experimental Botany, Vol.87, pp. 252-259, 2018, DOI:10.32604/phyton.2018.87.252

    Abstract The chemical and physical properties of the substrate produce positive or negative effects on the germination of seeds, and different pre-germination treatments are applied to obtain better results. However, the use of soil as a substrate where the species grows is usually not evaluated or used as a treatment. The objective of the present study was to evaluate the effect of the native substrate [two types of substrate where the woody species grow (clay and sand)] on the germination of Acacia farnesiana, Larrea tridentata and Prosopis laevigata. In addition, two groups were compared in seeds (grouped and More >

  • Open Access

    ARTICLE

    Regrowth, yield and nutrition of Leymus chinensis and Hordeum brevisubulatum in response to defoliation intensity and frequency

    Song Y1, CA. Busso5, Y Yu2, P Wang3, Wuyunna1, D Zhou4

    Phyton-International Journal of Experimental Botany, Vol.87, pp. 242-251, 2018, DOI:10.32604/phyton.2018.87.242

    Abstract The effects of different defoliation intensities and frequencies were studied on regrowth and herbage mass of Leymus chinensis and Hordeum brevisubulatum in northeast China for two years. Plants were defoliated to 6, 8 or 10 cm stubble height by removing about 40% of growth down to each designated defoliation height. In the first year, L. chinensis was defoliated 22, 17 or 13 times, and in the second year was defoliated 21, 15 or 15 times to reach 6, 8 or 10 cm stubble height treatments, respectively. H. brevisubulatum was defoliated 26, 21 or 15 times in the first year,… More >

  • Open Access

    ARTICLE

    Patterns of Leymus chinensis in response to grazing exclusion across two steppe habitats in Inner Mongolia: implications for phenotypic plasticity

    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 More >

  • Open Access

    ARTICLE

    Stem and root anatomy of Mnesithea selloana (Hack.) de Koning & Sosef

    Moya ME1,2, AA Galussi1,2, N Sattler2, MS Fontana2, YG Gillij1,2

    Phyton-International Journal of Experimental Botany, Vol.87, pp. 231-235, 2018, DOI:10.32604/phyton.2018.87.231

    Abstract The objective of this study was to analyze the anatomy of stems and roots of Mnesithea selloana. Free hand cross sections were made from fresh material of reproductive stems and adventitious roots; they were colored with safranin and mounted on glycerin jelly. Observations were made using an Olympus CH2 light microscope and photographed. In cross section, the stems were circular towards the distal end of the synflorescence and semicircular toward the proximal end, and have two ribs. A uniseriate, continuous epidermis presenting a smooth and thick cuticle and no hairs was observed. Parenchyma cells increased in… More >

  • Open Access

    ARTICLE

    Influence of heat stress on growth and physiological activities of potato (Solanum tuberosum L.)

    Naz N1, F Durrani1, Z Shah2, NA Khan1, I Ullah1

    Phyton-International Journal of Experimental Botany, Vol.87, pp. 225-230, 2018, DOI:10.32604/phyton.2018.87.225

    Abstract The progress and development of crops like potato are harmfully affected by increased heat stress throughout the world. Stress caused by increased heat adversely affects germination and seedling growth which result in a reduced crop development and yield. The present research was carried out to know the influence of heat stress on growth indices and physiological processes of potato (Solanum tuberosum L.). The heat stresses C- Control (25 °C); T1-45 °C, and T2-40 °C were applied in separate growth chambers to the plants, after 25 days from their germination. Increased heat stress considerably decreased the chlorophyll More >

  • Open Access

    ARTICLE

    Effect of the scarification methods on the germination and growth of seeds of the Fabaceae family members in presence of silver nanoparticles

    Vázquez Núñez E1, S Awate2, MC Carrasco Monrroy3

    Phyton-International Journal of Experimental Botany, Vol.87, pp. 216-224, 2018, DOI:10.32604/phyton.2018.87.216

    Abstract The effect of scarification methods and silver nanoparticles on plantlets growth were tested on seeds of plants belonging to the Fabaceae family (Prosopis laevigata, Acacia farnesiana and Erythrina americana), which are predominant species in semi-arid ecosystems in Mexico. The scarification methods consisted in using coarse sand paper and two different concentrations of sulphuric acid (H2SO4 98% and H2SO4 50%); immersion of seeds in distilled water was used as a control. The percentage of germination was calculated and the Kotowski´s coefficient was determined. After scarification, the seeds were immersed in silver nanoparticles solutions at different concentrations i.e., 100 mg/L, More >

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