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Paths of water entry and structures involved in the breaking of seed dormancy of Lupinus

dc.contributor.authorRobles Díaz, Erika
dc.contributor.authorFlores Rivas, Joel David
dc.contributor.authorYáñez Espinosa, Laura
dc.date.accessioned2019-08-09T22:22:48Z
dc.date.available2019-08-09T22:22:48Z
dc.date.issued2016
dc.identifier.citationErika Robles-Díaz, Joel Flores, Laura Yáñez-Espinosa, Paths of water entry and structures involved in the breaking of seed dormancy of Lupinus, Journal of Plant Physiology, Volume 192, 2016, Pages 75-80.
dc.identifier.urihttp://hdl.handle.net/11627/5044
dc.description.abstract"Physical dormancy is the water impermeability of the seed coat caused by one or more palisade cell layer(s) called macrosclereids. The specialised structure for water entry sites is the water gap, which serves as a detector of environmental cues for germination. In Fabaceae, the water gap is the lens, although another seed structure for water entry could exist. In this study, we identified the initial site of water entry, observed the hydration of a cushion-like structure near the radicle, described the anatomy of the water gap, and analysed the association of anatomical seed traits with the initial site of water entry and the imbibition velocity of six species of Lupinus from the state of Jalisco, Mexico. Dye tracking with a toluidine blue solution was used to identify the initial site of water entry. The anatomical description was performed using conventional microtechnique and a light microscope. The entry of the toluidine solution into seeds of L. montanus was observed after 6 h, followed by L. exaltatus and L. mexicanus after 18 h and L. elegans, L. reflexus and L. rotundiflorus after 48 h. The site of water entry was the lens in L. elegans, L. exaltatus, L. reflexus and L. rotundiflorus and the micropyle in L. mexicanus and L. montanus. The cushion-like structure was responsible for water accumulation in embryo imbibition. Significant differences among anatomical seed traits such as thickness in the hilar region, the counter-palisade layer, cushion-like structure, epidermis, hypodermis, and innermost parenchyma layer were found among the species."
dc.publisherElsevier
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectSeed anatomy
dc.subjectLupinus
dc.subjectPhysical dormancy
dc.subjectWater entry path
dc.subjectWater gap
dc.subject.classificationBIOLOGÍA VEGETAL (BOTÁNICA)
dc.titlePaths of water entry and structures involved in the breaking of seed dormancy of Lupinus
dc.typearticle
dc.identifier.doihttps://doi.org/10.1016/j.jplph.2016.01.005
dc.rights.accessAcceso Abierto


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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internacional