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Responses of germination to light and to far-red radiation—can they be predicte...
Dias, L.S.; Ganhão, E.; Dias, A.S.This paper presents an update of a dataset of seed volumes previously released online and combines it with published data of the photoblastic response of germination of fruits or seeds (light or dark conditions), and of the effects of enhanced far-red radiation on germination. Some evidence was found to support that germination in larger diaspores might be indifferent to light or dark conditions. Similarly, ger...
Imbibition, germination, and early seedling growth responses of light purple an...
Costa, A.S.; Dias, L.S.; Dias, A.S.The seeds of red clover are heteromorphic and two color morphs can be visually recognized, light purple and yellow, resulting from heterozygosity and recessive homozygosity at two loci. Here, we report the responses of seed imbibition, seed germination, and early seedling growth of the two morphs to distilled water, sodium chloride, and complete nutrient solution. The sensitivity of red clover seeds to treatmen...
Seed germination in Cistus ladanifer: heat shock, physical dormancy, soil tempe...
Dias, L.S.; Pereira, I.P.; Dias, A.S.Seeds of Cistus ladanifer experience bursts of germination following fires. The effects of heat shock from 10 °C to 150 °C on seed germination were investigated by final germination plus the number of days required for germination to start and finish, and symmetry of cumulative germination. The occurrence of physical dormancy in C. ladanifer seeds was investigated by a variety of methods, including imbibition, ...
The relationship between shape and size of diaspores depends on being seeds or ...
Dias, L.S.; Dias, A.S.The relationship between the size and shape of diaspores was investigated in angiosperms and gymnosperms including determining if being a seed or fruit was a factor. Size was expressed as volume and shape as the departure from a perfect idealized sphere. Departure from sphericity in seeds was found to be independent from volume. Conversely, an inverse relationship was found between departure from sphericity and...
Ranking Mediterranean-type shrubs and trees by their allelopathic activity is n...
Pereira, I.P.; Dias, L.S.; Dias, A.S.Water extracts from nineteen Mediterranean-type shrubs and trees were screened for phytoactivity on germination of lettuce. The existing model for the effects of pH and osmotic pressure on germination requires refitting. Extract concentrations were expressed as plant fresh weight, plant dry weight and extract dry weight and final ranking of the six phytoactive species was found to strongly depend on the way the...
Data set of Portuguese traditional recipes based on published cookery books
Dias, A.S.; Dias, L.S.This paper presents a data set resulting from the abstraction of books of traditional recipes for Portuguese cuisine. Only starters, main courses, side dishes, and soups were considered. Desserts, cakes, sweets, puddings, and pastries were not included. Recipes were characterized by the province and ingredients regardless of quantities or preparation. An exploratory characterization of recipes and ingredients i...
Defensive role of allelopathic secondary compounds in plants: a review of data ...
Dias, A.S.; Dias, L.S.; Pereira, I.P.This review examines and whenever appropriate, reanalyses published literature related to two general and independent hypotheses having the underlying assumption that phytoactive secondary compounds produced by plants evolved primarily as plant defences against competitor plant species. The first hypothesis is that production and the main way of release of phytoactive compounds reflect an adaptive response to c...
Investigating and modelling the combined effects of pH and osmotic pressure on ...
Dias, A.S.; Pereira, I.P.; Dias, L.S.Phytoactivity and allelopathic studies are heavily dependent on germination bioassays of water solutions of allelochemical(s), which necessarily imply that pH and osmotic pressure vary among treatments and between treatments and controls and are therefore a confounding factor in the assessment of seed germination responses to allelochemical(s). When the contribution of pH and osmotic pressure to seed germinatio...
“Language is the place from where the World is seen”—On the gender of trees, fr...
Dias, L.S.; Dias, A.S.Trees have always been important as natural entities carrying a strong symbolic and metaphorical weight, not to mention their practical uses. Therefore, words and their gender, used to name natural entities as important as trees and particularly fruit-trees and their fruits, are also important. Starting from the finding that Portuguese and Mirandese, the second official spoken language of Portugal, are Latin-de...
Allelopathy, seed germination, weed control and bioassay methods
Dias, L.S.; Pereira, I.P.; Dias, A.S.Even before its formal establishment as a scientific discipline, allelopathy has been intertwined with agriculture and the potential of allelopathy for weed control has been a permanent matter of interest. Therefore we investigate the importance of seeds and of permanent soil seed banks as a means for propagation of weed species as well as strategies for long-term weed control. Depleting seed banks is critical ...