Amorçage et séparation des graines d'épinette noire (Picea mariana (Mill.) B.S.P.) :

Gaudreault, Mélanie

doi:10.1522/24079327

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…Thus, the germination index of cultivars Padma, Petomech and Thorgal was less affected by salt stress than that of the four other cultivars. According to [29], the germination index quantifies the speed with which the seeds perform their germination indicating whether the seeds quickly germinate and synchronously. Our results revealed that salt stress significantly reduced the germination index in tomato cultivars from 30 mM NaCl indicating that salt stress reduced from lower concentration the speed of seed germination in four cultivars and consequently delayed germination.…”

Section: Time (Days)mentioning

confidence: 99%

Salt Resistance of Tomato (Lycopersicon esculentum Mill.) Cultivars Produced in Benin at Germination Stage

Kinsou¹,

Montcho

Zanklan³

et al. 2019

IJPSS

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Aims: In this research study, salt resistance level of seven tomato cultivars grown in Benin, namely Akikon, Tounvi; F1 Mongal, Petomech, Padma, TLCV 15 and Thorgal was evaluated at the germination stage. Study Design: The experiment was laid out as a completely randomized design with four replications. Place and Duration of Study: The experiment was carried out in the Laboratory of Plant Physiology and Abiotic Stresses Study of University of Abomey-Calavi, Republic of Benin from May to June, 2017. Methodology: Seeds were submitted to treatment with four NaCl concentrations (0; 30; 60 and 90 mM NaCl) in Petri dishes. Seed germination was checked every day during ten days incubation period. Four replicates of 40 seeds each were used. Results: NaCl reduced seed germination rate in all cultivars from day 2 to day 10 and the germination index proportionately to NaCl concentration. At the end of the 10 days, salt stress reduced the final germination percentages with a significant difference among cultivars: cultivars F1 Mongal followed by Akikon, Thorgal, TLCV15 and Tounvi were less affected in comparison with the two other cultivars. Salt Tolerance Index was significantly variable according to the cultivar with the highest values for cultivars F1 Mongal (1.086), Akikon (1.028), TLCV15 (1.005) and Tounvi (0.989) and the weakest value for cultivar Petomech (0.436). Conclusion: NaCl stress delayed seed germination and reduced the rate of final germination. Salt Tolerance Index was variable among the seven cultivars. Based on this criterion, cultivars F1 Mongal, Akikon, TLCV15 and Tounvi were the most salt-resistant whereas Petomech was the most salt-sensitive at germination stage.

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Section: Time (Days)mentioning

confidence: 99%

Salt Resistance of Tomato (Lycopersicon esculentum Mill.) Cultivars Produced in Benin at Germination Stage

Kinsou¹,

Montcho

Zanklan³

et al. 2019

IJPSS

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“…Germination speed [78] The germination speed is an expression of the germination energy responsible for the depletion of seed reserves. It can be expressed by the median germination time (T50) (the time after which 50% of the germinated seeds were reached) [80]; the germination velocity coefficient (CV) [81][82][83] corresponds to the reciprocal of the average germination time, and makes it possible to evaluate the uniformity of germination [84]. These measures allowed us to take into consideration the germination behavior of all the seeds for each treatment.…”

mentioning

confidence: 99%

Effects of Pre-Treatments and Conservation Conditions on Seed Viability and Germination of Two Varieties of an Endangered Species Anacyclus pyrethrum (L.) Link (Asteraceae)

et al. 2023

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This research presents, for the first time, a study of seed germination for two varieties, ‘Anacyclus pyrethrum var. pyrethrum (L.) Link’ and ‘Anacyclus pyrethrum var. depressus (Ball.) Maire’, of an endemic and endangered medicinal species listed in the IUCN red list as Anacyclus pyrethrum (L.) Link. Our objective was to provide information for their protection as well as a sustainable development strategy, by understanding whether the seeds germinate easily or have very specific germination requirements, and whether the storage conditions provided for the seeds were sufficiently favorable for the development of the species. A study of seed germination of the two varieties was conducted on lots of 25 seeds for each variety/treatment. Five treatments were used to break seed dormancy, which were chemical scarification with sulphuric acid (H2SO4), hydrogen peroxide (H2O2) and potassium nitrate (KNO3); hot water (80 °C); and cold scarification at 4 °C. The viability was examined for stored seeds (6 months, 1 year and 2 years) and for those that did not germinate after the germination test at harvest, using the tetrazolium test. The dormancy was broken via cold scarification (4 °C) and chemical scarification (H2O2, H2SO4, NP (KNO3)). The results also showed that a long storage time in wet cold (4 °C) causes a loss of seed viability, whereas a long storage time at −17 °C causes seed dormancy, which can be broken by cold scarification and chemical scarification. It was concluced that the rarity of the species was not due to the reproductive system, but to the overexploitation of the species during the flowering season, which influenced the natural regeneration of the species.

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Study of the effect of pretreatments on the germination and growth of Pistacia Atlantica subsp. atlantica: Investigations for the conservation of an endangered species in Morocco

Bassouya,

Jawhari,

Lafraxo

et al. 2024

BIO Web Conf.

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The study delves into the critical issue of declining Moroccan endemic plant species of agro-sylva-pastoral and medicinal significance, impacted by various environmental degradation factors. With the aim of conserving and rehabilitating these species, the research focused on improving the germination and growth parameters of Pistacia atlantica subsp. atantica whose seeds were carried from different area of the Middle Moulouya; Oled Ali Youssef; El Orjane and Fritissa. In this study, nine different treatments were employed to overcome seed dormancy. These treatments included chemical scarification using gibberellic acid and sulfuric acid (98%), thermal scarification at 40°C for 24, 48, and 72 hours, mechanical scarification using manual sandpaper, and stratification at +4°C for 45, 60, and 75 days. The results showed that mechanical scarification yielded notably higher germination rates compared to the control group. Specifically, for seeds from Oled Ali Youssef, the germination rate was 81.11%, while for El Orjane and Fritissa, it was 38.88% and 71.11%, respectively, in contrast to 67.78%, 25.56%, and 44.44% in the control group. Moreover, the study revealed that treatments such as mechanical scarification, gibberellin application, and 30-day cold stratification significantly influenced the growth of seedlings, enhancing propagation practices for the species from its seeds. These findings underscore the importance of seed source, viability, and pre-germination treatments in achieving successful germination and growth.

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Amorçage et séparation des graines d'épinette noire (Picea mariana (Mill.) B.S.P.) :

Cited by 4 publications

References 29 publications

Salt Resistance of Tomato (Lycopersicon esculentum Mill.) Cultivars Produced in Benin at Germination Stage

Salt Resistance of Tomato (Lycopersicon esculentum Mill.) Cultivars Produced in Benin at Germination Stage

Effects of Pre-Treatments and Conservation Conditions on Seed Viability and Germination of Two Varieties of an Endangered Species Anacyclus pyrethrum (L.) Link (Asteraceae)

Study of the effect of pretreatments on the germination and growth of Pistacia Atlantica subsp. atlantica: Investigations for the conservation of an endangered species in Morocco

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