Stratification and Priming May Improve Seed Germination of Purple Coneflower, Blue-Flag Iris and Evening Primrose

Wees, David

doi:10.17660/actahortic.2004.629.50

Cited by 8 publications

(5 citation statements)

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“…Commercial production of Echinacea is traditionally seed-based, with seed source and seed quality reported to affect germination of E. purpurea (Hassel et al, 2004;Li, 1998; and E. angustifolia (Hassel et al, 2004), but not E. pallida (Hassel et al, 2004). There has been extensive experimentation on chemical, environmental and mechanical methods, such as scarifi cation and seed priming, to break Echinacea and other species' seed dormancy (Feghahati and Reese, 1994;Pill and Haynes, 1996;Samfi eld et al, 1991;Steadman, 2004;Wees, 2004;Yamauchi et al, 2004) in order to synchronize emergence rates and improve seedling production efficiency. Ethephon pretreatment in conjunction with cold-moist stratifi cation provided optimum Echinacea seed germination (Sari et al, 1999), while GA (Feghahati and Reese, 1994;Macchia et al, 2001) and BA (6-benzylaminopurine) were found to be effective treatments for E. angustifolia (Chuanren et al, 2004).…”

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confidence: 99%

The Effect of Seed Source, Light during Germination, and Cold-moist Stratification on Seed Germination in Three Species of Echinacea for Organic Production

Romero¹,

Delate²,

Hannapel³

2005

HortSci

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Organic production of one of the most popular botanical supplements, Echinacea, continues to expand in the U.S. Echinacea seeds typically show a high degree of dormancy that can be broken by ethephon or gibberellic acid (GA), but these methods are currently disallowed in organic production. In order to determine the efficacy of nonchemical seed treatments, we evaluated the effect of varying seed source and supplying light, with and without cold-moist stratification, on seed germination of the three most important medicinal species of Echinacea, E. angustifolia DC, E. purpurea (L) Moench, and E. pallida (Nutt.) Nutt. Treatments included cold-moist stratification under 24 hours of light, 24 hours of dark, and 16/8 hours of light/dark to break seed dormancy. We found that germination was greater in the E. purpurea and E. pallida seeds from a commercial organic seed source compared to a public germplasm source. When seeds were not cold-moist stratified, 16 to 24 hours light increased germination in E. angustifolia only. Echinacea angustifolia, E. purpurea, and E. pallida seeds that were cold-moist stratified under 16 to 24 hours of light for 4 weeks had a significantly greater percentage and rate of germination compared to seeds germinated in the dark. Therefore, cold-moist stratification under light conditions is recommended as a method to break seed dormancy and increase germination rates in organic production of Echinacea.

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confidence: 99%

The Effect of Seed Source, Light during Germination, and Cold-moist Stratification on Seed Germination in Three Species of Echinacea for Organic Production

Romero¹,

Delate²,

Hannapel³

2005

HortSci

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“…Holloway (1987) showed that, when seeds of Alaska Iris were stratified in peat at 4 °C for 125 d, germination increased from 0% to 30%. Wees (2004) found the storing I. versicolor seeds in wet paper towels at 4 to 5 °C for 4 weeks increased germination percentage from 9% to 58% as compared to control. It was showed that stratification was an effective method in Iris seeds to improve germination via the growth potential of the embryo increased like seed of Syringa refl exa (Junttila,1973), or the pericarp (or endosperm) structure disintegrated like seed of Camptotheca acuminate (Chen et al, 2001).…”

Section: Resultsmentioning

confidence: 86%

NaOH Scarification and Stratification Improve Germination of Iris lactea var. chinensis Seed

Sun¹,

Zhang²,

Wang³

2006

HortSci

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Iris lactea seed is characterized mainly by physiological dormancy. Two experiments were conducted to investigate the effect of NaOH treatment and stratification on Iris seed germination. In Experiment 1, seeds were treated with 14.38 M NaOH for 0 to 28 hours. In Experiment 2, NaOH treated and nontreated seeds were stratified under 7 °C and moistened condition for 0 to 40 days. As results, NaOH treatment for 20 hours effectively removed seedcoat and improved germination percentage from 0% to 56% compared to control (0 hours). However, germination percentage started to decrease after 20 hours. Stratification for 40 days further improved germination percentage of NaOH treated seeds to >80%, but did not affected seeds without NaOH treatment. Results demonstrate that combination of NaOH treatment and stratification is an effective practice to break Iris seed dormancy and improve germination percentage.

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“…It can take from 3 months to 3 years [60]. Iris versicolor seeds germinate 58% in the greenhouse using cold stratification; this is storing seeds in wet paper towels at 4-5°C for 3-4 weeks [61]. Iris pseudacorus germinates 80-86% in an incubator at 12-h/12-h light regime and 30/20°C alternating temperatures or constant temperature of 26°C.…”

Section: Juncoid Speciesmentioning

confidence: 99%

Seed Germination Technologies for Helophyte Production Used in Wastewater Treatment

Téllez¹,

Vázquez-Pardo²,

Salas³

et al. 2016

New Challenges in Seed Biology - Basic and Translational Research Driving Seed Technology

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Constructed green wetlands with horizontal surface for wastewater treatment are gaining acceptance. Many countries have published innovative experiences with this technology. A great variety of wastewaters from industries have been treated. Different plant species have been tested. Seed technology development provides interesting tools to produce these species in nurseries. It is a sustainable new business. But studies on seed germination of aquatic and lacustrine plants are very few. That is why we have made the following bibliographic review. We have summarised and analysed the state of the art of this innovative topic, concluding that seed technology for multiplication of helophytes needs further experimental work. But there is enough information to produce right now, tens of different species. Significant efforts have been done. Even though it is a challenge to produce from now on, experimental results are ready to be transferred to those who are trading with this type of plants. Helophytes have a promising future as sustainable elements of the upcoming sewage equipment. Improvements on the biotechnology of these species are a worthwhile researching line. To this aim, the following revision is an essential compilation with which to begin.Various authors have highlighted that studies on seed germination of aquatic and lacustrine plants are very few [13]. This topic is a much less studied subject that other aspects of seed biology, physiology or ecology. However it has a great importance from an applied point of view. That is why we have made the following bibliographic review. It will let us summarise and analyse the state of the art of this interesting topic.

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Stratification and Priming May Improve Seed Germination of Purple Coneflower, Blue-Flag Iris and Evening Primrose

Cited by 8 publications

References 0 publications

The Effect of Seed Source, Light during Germination, and Cold-moist Stratification on Seed Germination in Three Species of Echinacea for Organic Production

The Effect of Seed Source, Light during Germination, and Cold-moist Stratification on Seed Germination in Three Species of Echinacea for Organic Production

NaOH Scarification and Stratification Improve Germination of Iris lactea var. chinensis Seed

Seed Germination Technologies for Helophyte Production Used in Wastewater Treatment

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