Sebastián Bañón

Effects of a protein hydrolysate applied by fertigation on the effectiveness of calcium as a corrector of blossom-end rot in tomato cultivated under saline conditions

Abstract The effects of the addition of Ca (100 and 200 g of gypsum per plant) to the substrate on the incidence of blossom-end rot (BER) in tomatoes cultivated by drip irrigation with water of 4.85 dS m−1 and high level of Mg salts (11.7 meq l−1) were studied, with and without the application by fertigation of a protein hydrolysate containing 87.6 g l−1 of organic N (with 13.2% of free amino acids). The addition of gypsum reduced BER at best by 50%. The concentration of Ca in fruit and leaves usually increased with the addition of gypsum, as did the Ca Mg ratio. A highly significant correlation between BER incidence and Ca concentration in the distal portion of the fruit was found 10 days after anthesis, but not at full ripeness. Application of a protein hydrolysate by fertigation improved the reduction of BER, with a total absence of affected fruits in the first truss of those plants with 200 g of gypsum. The addition of the hydrolysate increased the content of histidine (17%), proline (15%) and alanine (11%) in ripe fruit. A highly significant correlation was found between the incidence of BER and the joint content of Ca and proline in the fruit.

Flowering responses of Gladiolus tristis (L.) after exposing corms to cold treatment

The influence on the subsequent growth and development of Gladiolus tristis after exposing the corms to low temperatures was studied. Corms stored for 3 or 6 weeks at 5°C and 90% RH flowered 20 and 11 days, respectively, before the controls, while the length of the flowering period increased by 35 days after the longer storage period. The vegetative and quality parameters of the gladiolus flowering stem were similar to those of the control, except that flowering stem and spike lengths increased after 6 weeks of cold treatment.

Effects of vernalization and exogenous gibberellins on curd induction and carbohydrate levels in the apex of cauliflower (Brassica oleracea var. botrytis)

Abstract The effect of applying gibberellins (GA 4+7 ) to autumn cauliflower plants ( Brassica oleracea var. botrytis , cv. Nautilus) grown under strong (10°C) and weak (22°C) curd-inducing conditions was studied, and the carbohydrate levels in the apex were analysed. Plants grown at 10°C developed hardly any new leaves, and there was no increase in accumulated dry matter in the leaves compared with plants cultivated at 22°C. Curd initiation occurred after three weeks at 10°C after the appearance of 23 leaves. Identical results were obtained after the application of gibberellins to plants grown at this temperature. However, at 22°C, the application of gibberellins reduced the number of initiated leaves by 30%. Curd initiation occurred after the initiation of 28 and 44 leaves by treated and untreated plants, respectively, although a week earlier in the treated plants. The sugars identified in the apex were glucose, fructose and sucrose. Levels of these carbohydrates increase in plants cultivated 10°C, although the applications of gibberellins, both to plants cultivated at 10°C and 22°C, increased the carbohydrate content in the apex. Taken together, these results suggest that the applications of gibberellins advances curd initiation in cauliflower only under sub-optimal conditions of vernalization.

The effect of ethephon on the growth and development of Liatris spicata

SummaryThe first experiment studied the effect of applying ethylene biosynthesis regulating compounds (ethephon 1000 ppm, silver thiosulphate 0.4 mM and cobalt chloride 5 mM) on the growth and development of Liatris spicata cv. Callilepis. The results pointed to the important growth retardant properties of ethephon and the increased number of flowering stems per corm which could be obtained by pre-planting application. A second experiment aimed to optimize ethephon treatment in Liatris by applying the growth retardant in different concentrations (100, 700, 1300, 1900 and 2500 ppm) at three stages of development: stage I (pre-planting), stage II (immediately after the formation of basal leaf rosette) and stage III (when the main shoot began its rapid longitudinal growth). Besides confirming the effects produced by ethephon in the first experiment, the results suggested that the application of high ethephon concentrations (1900 and 2500 ppm) during stage II of growth produced many miniature flowering stems ...

Effect of different quality irrigation water on the growth, mineral concentration and physiological parameters of Viburnum tinus plants

This work was supported by the projects: CICYT (AGL 2008- 05258-CO2-1-2- AGR and AGL 2011-30022-CO2-01-02), Fundacion Seneca (15356/PI/10) and Vias y Construccion, S. A. (CDTI IDI-20101191).Resumen del trabajo presentado a la 4th International Conference on Analytical proteomics, celebrada en Caparica (Portugal) del 7 al 9 de septiembre de 2015.Resumen del trabajo presentado al XXII Congreso Espanol de Toxicologia y VI Iberoamericano, celebrado en Valencia (Espana) del 28 al 30 de junio de 2017.

Effects of salinity and B excess on the growth, photosynthesis, water relation and mineral composition of laurustinus grown in greenhouse

Trabajo presentado en el XXVIII International Horticultural Congress on Science and Horticulture for People (IHC2010): International Symposium on Greenhouse 2010 and Soilless Cultivation, celebrado en Lisboa, Portugal, del 22 al 27 de agosto de 2010