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 bank to the number of… More >

BIOCELL, Vol.26, Suppl.S, pp. 69-118, 2002

Abstract This article has no abstract. More >

Juanita BUSTAMANTE^1,*, Analía CZERNICZYNIEC², Silvia LORES-ARNAIZ²

BIOCELL, Vol.40, No.1, pp. 11-14, 2016, DOI:10.32604/biocell.2016.40.011

Abstract The suppressive effects of ketamine on intracellular calcium has been reported in a variety of cells although the mechanisms involved are not well understood. The aim of this work was to evaluate the ketamine effect on the mitochondrial Ca²⁺ accumulation and the cellular Ca²⁺ mobilization using FLUO4-AM and flow cytometry. The results showed that mitochondria from ketamine injected animals presented a lower ability to retain calcium at concentrations higher than 20 μM, as compared with controls (saline injected animals). In addition, ketamine showed a significant decreased KCl-induced intracellular calcium concentration. KCl increased calcium influx through cellular depolarization. According to the… More >

KHESLLER PATRÍCIA OLÁZIA NAME, GIULIANO PAGY FELIPE DOS REIS, SÔNIA NAIR BÁO

BIOCELL, Vol.31, No.2, pp. 229-236, 2007, DOI:10.32604/biocell.2007.31.229

Abstract The spermiogenesis of Sitophilus zeamais and Sitophilus oryzae, the maize and the rice weevil, respectively, was studied by light microscopy and scanning and transmission electron microscopy. Sitophilus spp. is the most widespread and destructive primary pest of stored cereals in the world. The spermiogenesis occurs within cysts. There are approximately 256 germ line cells per cyst. Inside each cysts, all the spermatids are in the same stage of maturation. The ultrastructure of the spermatozoa of S. zeamais and S. oryzae is similar to that described for other beetles. The head is formed by a three-layered acrosome with the perforatorium, the… More >

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 in the nursery. This variable… More >

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 roadsides and embankments along… More >

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 10 minutes; (3)… More >

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 not grouped) of… More >

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, and… More >

María P BENAVIDES¹, Susana M GALLEGO¹, Facundo RAMOS ARTUSO², Mariana CHECOVICH³, Andrea GALATRO^*

BIOCELL, Vol.40, No.1, pp. 1-6, 2016, DOI:10.32604/biocell.2016.40.001

Abstract Plants are exposed to environmental stress, in natural and agricultural conditions.Nitric oxide (NO), a small gaseous molecule which plays important roles in plants, has been involved in many physiological processes, and emerged as an important endogenous signaling molecule in the adaptation of plants to biotic and abiotic stress. NO is produced from a variety of enzymatic and non enzymatic sources, which are not yet fully understood. Also, NO and reactive nitrogen species (RNS) can produce posttranslational modifications affecting protein function. Nitrate reductase, a key enzyme in the nitrogen metabolism, is a proposed source of NO in plants which could be… More >