Cryo-exposure of Neonotonia wightii Wigth and Am seeds enhances field performance of plants

Acosta, Yanier; Santiago, Félix; Escalante, Doris; Mazorra, Carlos; Cejas, Inaudis; Martínez-Montero, Marcos Edel; Escobar, Abraham; Sershen,; Hajari, Elliosha; Lorenzo, José Carlos; Fontes, Dayamí

doi:10.1007/s11738-019-3010-y

Cited by 8 publications

(3 citation statements)

References 5 publications

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“…The effects of temperature on the germination rate of an individual seed and of lots of seeds have been studied for a long time (e.g., Sachs, [11]), but it remains a major topical issue in agronomy and ecology because of its theoretical and practical implications [2,17,[26][27][28].…”

Section: Discussionmentioning

confidence: 99%

The Concepts of Seed Germination Rate and Germinability: A Re-Evaluation for Cool-Season Grasses

et al. 2022

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Temperature is one the most influential environmental factors for the germination and establishment of grass species. The specific objective of this study was to determine the effects of low constant temperature on the time needed to express the full germination capacity of nondormant seedlots. Fifteen accessions, comprising seven of Lolium perenne L., three of Festuca arundinacea Schreb., three of Dactylis glomerata L. and two of Triticum aestivum L., were evaluated at constant temperatures of 5 and 21 °C. As expected, the germination rates were faster at 21 °C than at 5 °C. Indeed, at 5 °C seeds needed up to twenty-one times longer to reach the maximum germination than when tested at 21 °C. The genotypic variability found for the ratio of germination rates between the two temperatures (i.e., germination rate at 5 °C/germination rate at 21 °C) was much more variable than what is found in the literature for perennial cool-season grasses. On the other hand, in most cases, no significant differences were observed in the germinability (the capacity to germinate) response to 5 °C and 21 °C. Within the four species, twelve of the fifteen studied accessions expressed the same germinability at 5 °C and 21 °C, when given enough time. Only three accessions had final germination percentages higher at 21 °C than at 5 °C. Our results suggest that, in general, nondormant seeds at low temperatures germinate as well as nondormant seeds at near-optimal temperatures, provided they have enough time to express their germination capacity. These findings cast doubts on the validity of conclusions drawn in many studies where germination experiments were performed for a period insufficient to obtain full germination at low temperatures. Another major finding in this work concerns the risk of wrongly estimating germinability at low temperatures.

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Section: Discussionmentioning

confidence: 99%

The Concepts of Seed Germination Rate and Germinability: A Re-Evaluation for Cool-Season Grasses

et al. 2022

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“…As many other annual and perennial legumes, in particular of the Papilionoideae subfamily ( Baskin and Baskin, 2014 ; Acosta et al, 2020 ), it has been well documented that physical dormancy due to hardseededness is present in lucerne to various degrees ( Acharya et al, 1999 ). Hardseededness is characterised by a water-impermeable seed coat that ensures a maintenance of the population in the soil and prevents its germination up to several years ( Baskin and Baskin, 2004 ; Finch-Savage and Leubner-Metzger, 2006 ).…”

Section: Introductionmentioning

confidence: 99%

“…Hardseededness is characterised by a water-impermeable seed coat that ensures a maintenance of the population in the soil and prevents its germination up to several years ( Baskin and Baskin, 2004 ; Finch-Savage and Leubner-Metzger, 2006 ). Despite the uncontested ecological advantages associated with the different types of seed dormancy ( Baskin and Baskin, 2014 ), it hampers crop establishment due to low percentage of germinating seeds and slow rates of seedling emergence ( Acosta et al, 2020 ). This type of physical dormancy is broken by different treatments to the seeds, including scarification, which makes imbibition possible by overcoming coat’s impermeability to water ( Baskin and Baskin, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

The History of Domestication and Selection of Lucerne: A New Perspective From the Genetic Diversity for Seed Germination in Response to Temperature and Scarification

et al. 2021

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Lucerne (Medicago sativa), a major perennial pasture legume, belongs to a species complex that includes several subspecies with wild and cultivated populations. Stand establishment may be compromised by poor germination. Seed scarification, deterioration and temperature have an impact on germination. The objective of this study was to analyse the genetic diversity of lucerne germination in response to three factors: (1) temperature, with seven constant temperatures ranging from 5 to 40°C, was tested on 38 accessions, (2) seed scarification was tested on the same accessions at 5 and 22°C, (3) seed deterioration was tested on two accessions and two seed lots at the seven temperatures. The germination dynamics of seed lots over time was modelled and three parameters were analysed: germinability (germination capacity), maximum germination rate (maximum% of seeds germinating per time unit), and lag time before the first seed germinates. Seed scarification enhanced germinability at both temperatures and its effect was much higher on falcata and wild sativa accessions. Incomplete loss of the hardseededness trait during domestication and selection is hypothesised, indicating that the introduction of wild material in breeding programmes should be followed by the selection for germinability without scarification. Seed lots with altered germinability had low germination at extreme temperatures, both cold and hot, suggesting that mild temperatures are required to promote germination of damaged seed lots. A large genetic diversity was revealed for germination (both capacity and rate) in response to temperature. All accessions had an optimal germination at 15 or 22°C and a poor germination at 40°C. The sativa varieties and landraces had a high germination from 5 to 34°C while the germination of falcata and the wild sativa accessions were weakened at 5 or 34°C, respectively. These differences are interpreted in terms of adaptation to the climate of their geographical origin regions in order to escape frost or heat/drought risks. These new findings give insights on adaptation and domestication of lucerne in its wide geographic area. They suggest further improvement of germination is needed, especially when introducing wild material in breeding pools to remove scarification requirements and to limit differences in response to temperature.

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Dormancy breaking in Teramnus labialis (L.f.) Spreng seeds through liquid nitrogen exposure is based on the modification of the hilar region, cuticle, and macrosclereid

et al. 2020

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Cryo-exposure of Neonotonia wightii Wigth and Am seeds enhances field performance of plants

Cited by 8 publications

References 5 publications

The Concepts of Seed Germination Rate and Germinability: A Re-Evaluation for Cool-Season Grasses

The Concepts of Seed Germination Rate and Germinability: A Re-Evaluation for Cool-Season Grasses

The History of Domestication and Selection of Lucerne: A New Perspective From the Genetic Diversity for Seed Germination in Response to Temperature and Scarification

Dormancy breaking in Teramnus labialis (L.f.) Spreng seeds through liquid nitrogen exposure is based on the modification of the hilar region, cuticle, and macrosclereid

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