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

Robles-Díaz, Erika; Flores, Joel; Yáñez-Espinosa, Laura

doi:10.1016/j.jplph.2016.01.005

Cited by 11 publications

(5 citation statements)

References 27 publications

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“…At this point, the dye solution was absorbed by the inner part of the seed and water uptake began in the embryo, with movement patterns similar to those of the seed coat. Similar results were found Erika et al (2016). Seed Dormancy and Germination in Alfalfa (Medicago falcata L.)…”

Section: Initial Point Of Water Entry Into Seedssupporting

confidence: 86%

Seed Dormancy and Germination in Alfalfa (Medicago falcata L.)

Wang,

Shi,

Shi

et al. 2023

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Background: Medicago falcata L. (M. falcata L.) is widely distributed in Xinjiang and Inner Mongolia, which is a significant source of resistance genes. Its seeds have a high level of physical dormancy (PD). The current study aimed to study the dormancy characteristics, water absorption characteristics and methods for releasing hard seeds of M. falcata L., to reveal the the relationship between seed coat structure and water absorption and to understand the dormancy characteristics, which can provide theoretical basis for seed dormancy and seed biology research. Methods: Seed germination rate (GR), absorption, germination inhibitor activity and initial site of water entry into seeds were measured to investigate the causes of seed dormancy. Treatments to break dormancy included: (1) sandpaper sanding, (2) ultrasonic treatment for 30 min after sandpaper sanding, (3) 98% sulfuric acid immersion (5,10, 20, 40, 60 and 120 min) and (4) hot water immersion at different temperatures (50, 60, 70, 80 and 90oC) for 10 min, 20 min and 30 min. Result: The results showed that the hard rate of untreated seeds was 99.33% and the hard rate after the seed coat was scratched was 1.33%. Based on the inhibitory activity test of M. falcata L. seeds, high concentration seed extract has an inhibitory effect on the growth of other seeds. The toludine staining test showed that the hilum and microscope are the initial and main parts for seed water absorption. The germination rate of seeds after soaking in 98% sulfuric acid for 40 minutes and ultrasonic treatment with sandpaper for 30 minutes is higher than 94%, which is an effective method to relieve the PY of M. falcata L. seeds.

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Section: Initial Point Of Water Entry Into Seedssupporting

confidence: 86%

Seed Dormancy and Germination in Alfalfa (Medicago falcata L.)

Wang,

Shi,

Shi

et al. 2023

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“…In this context, Robles-Díaz [ 2 , 6 ] and Perissé and Planchuelo [ 5 ] documented the presence of cushion-like structure and tracheid bars as direct evidence of the existence of PY in Mexican and Argentine Lupinus species respectively. Although we found almost all these morphological structures described above, our results about morphological characterization also confirm the assumption of the existence of PY in E. cyclocarpum and P. piscipula [ 12 , 19 ].…”

Section: Discussionmentioning

confidence: 99%

“…When the water gap opens, then, the PY breaks. In the case of some Fabaceae species, the cushion-like structure is also involved in the process of seed imbibition [ 5 , 6 ]. Germination process is a crucial phase in plant development influenced in part by water [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Pre-Germinative Treatments and Morphophysiological Traits in Enterolobium cyclocarpum and Piscidia piscipula (Fabaceae) from the Yucatan Peninsula, Mexico

Arceo-Gómez

Robles-Díaz

Manrique-Ortega

et al. 2022

Plants

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Enterolobium cyclocarpum and Piscidia piscipula are two important tree Fabaceae species distributed from the Yucatan Peninsula, Mexico. Our aims were focused on the E. cyclocarpum and P. piscipula seeds for: (1) to examine the seed permeability and imbibition rate, (2) to evaluate the effect of seed pre-germinative treatments, and (3) to characterize the structures involved on the presence of physical dormancy (PY). We used fresh seeds to determine seed permeability and imbibition rate, seed viability by means of tetrazolium test, furthermore, we applied mechanical scarification and boiler shocks for 5 s, 10 s and 15 s treatments. Morphological characterization of the seed coat was by Scanning Electron Microscope (SEM). Seed viability in E. cyclocarpum and P. piscipula were 100% and 96%, respectively. Seed permeability and imbibition rate in E. cyclocarpum were low. The highest germination in E. cyclocarpum was in the mechanical scarification (92%), while in P. piscipula, this parameter was in the 10 s boiling water treatment (76.0%). The presence of PY was confirmed in both species because they showed low seed permeability, and imbibition rate; furthermore, exhibited macrosclereids cells. The present research seeks to promote the sustainable use of E. cyclocarpum and P. piscipula.

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“…parahyba, while in this study, a mesotesta with thick cell walls and no intercellular space below a multi-layered hypodermis of osteosclereids could be observed. This is unusual, as several studies describe the hypodermis in the seed coat of Fabaceae as a single layer of osteosclereids (for example, Costa et al, 2011;Rodrigues-Junior, et al, 2014;Robles-Díaz et al, 2016;Geisler et al, 2017;Jaganathan et al, 2017;Teixeira et al, 2018). In this way, the multi-layered hypodermis of osteosclereids seems to be a useful characteristic to distinguish the S. parahyba var.…”

Section: /9mentioning

confidence: 99%

Moist Heat Overcomes Physical Dormancy at the Seed Coat Lens in Schizolobium parahyba var. amazonicum

Smychniuk¹,

Calvi

Ferraz

2020

Floresta Ambient.

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Schizolobium parahyba var. amazonicum (Huber ex Ducke) Barneby (Fabaceae-Caesalpinoideae) is a tree of the Amazon region with pioneer characteristics and large seeds with physical dormancy. Using Accelerated Ageing (AA) methodology, seeds were exposed to Moist Heat (40 °C; >97% Relative Humidity; RH) or Dry Heat (40 °C; 22% RH). Furthermore, it was also investigated dormancy release and the primary site of water entrance into the seeds. Seeds tolerate these conditions for up to six days without any reduction in vigour, however, only Moist Heat could overcome seed dormancy, allowing germination. The lens is the water-gap for primary water entry (where the palisade layer is thinner), as seeds with blocked lens did not imbibe. An unusual multi-layered hypodermis of osteosclereids in the seed coat was observed. Our results suggest that the combination of high temperature with high RH is a key factor involved in overcoming dormancy in the natural habitat of this Amazonian species.

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

Cited by 11 publications

References 27 publications

Seed Dormancy and Germination in Alfalfa (Medicago falcata L.)

Seed Dormancy and Germination in Alfalfa (Medicago falcata L.)

Pre-Germinative Treatments and Morphophysiological Traits in Enterolobium cyclocarpum and Piscidia piscipula (Fabaceae) from the Yucatan Peninsula, Mexico

Moist Heat Overcomes Physical Dormancy at the Seed Coat Lens in Schizolobium parahyba var. amazonicum

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