Germination ecology of five arable Ranunculaceae species
MetadataShow full item record
Germination and emergence are critical life stages for annual plants and so their full understanding is essential for managing arable plant populations. This study investigated the most important species-specific environmental cues that regulate seed germination and emergence (temperature and light)
of the arable Ranunculaceae species Consolida orientalis, Consolida pubescens, Delphinium gracile, Delphinium halteratum ssp. verdunense and Nigella gallica, in order to propose management strategies for their preservation in agro-ecosystems. Growth chamber and outdoor pot experiments were conducted for two consecutive seasons to analyse light (complete darkness or 12 h light) and temperature (5/10, 5/15 and 10/20ºC) requirements and emergence patterns. The relative light germination requirement (ΔGlight), which extends from -100 (complete darkness) to 100 (light), was estimated. Weibull functions were fitted to observed emergence (%) in pots. For all species, germination was higher in complete darkness than with a light regime (-60 < ΔGlight < -95). This dark requirement indicates better germination for buried seeds. A tillage operation just after seed shed is therefore recommended. Consolida spp. germinate and emerge almost exclusively in autumn-winter, while Delphinium spp. and N. gallica can also germinate in spring. These arable plants would be able to adapt to delayed sowings, an important strategy for avoiding early-emerging competitive weeds. Facultative winter-germinating species could face early herbicide treatments if sufficient emergence occurs in winter-spring. These results bring new information to develop conservation strategies for these species in agro-ecosystems.
Is part ofWeed Research, 2015, vol. 55, núm. 5, p. 503-513
European research projects
Showing items related by title, author, creator and subject.
Temperature and light requirements for germination and emergence of three arable Papaveraceae species Torra Farré, Joel; Royo-Esnal, Aritz; Recasens i Guinjuan, Jordi (2016)This research investigated the temperature and light requirements for seed germination and emergence patterns of pinnate poppy, violet horned-poppy, and nodding hypecoum, three annual Papaveraceae species found in arable ...
Royo-Esnal, Aritz; Torra Farré, Joel; Conesa i Mor, Josep A. (Josep Antoni); Forcella, Frank; Recasens i Guinjuan, Jordi (Weed Science Society of America, 2010-03)Multiyear Field data from Spain were used to model seedling emergence for three bedstraw species (Galium) that can coexist in winter cereal fields. The relationships between cumulative emergence and both growing degree ...
Torra Farré, Joel; Royo-Esnal, Aritz; Recasens i Guinjuan, Jordi (Public Library of Science, 2018-06-25)Very little information is available on emergence of rare arable plants (RAP) in relation to soil disturbance and seed burial conditions in Europe. This information is essential to design conservation and soil management ...