Physiological aspects of seed recalcitrance: a case study on the tree<i>Aesculus hippocastanum</i>

Obroucheva, N. V.; Sinkevich, I.A.; Lityagina, S. V.

doi:10.1093/treephys/tpw037

Cited by 42 publications

(40 citation statements)

References 100 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The decreased activity of the antioxidant system and the enhancement of lipid peroxidation were the main reasons for the declined viability of recalcitrant seeds during desiccation [45,46]. The negative effects of seed desiccation were confirmed by the results of MDA content, where the highest values were obtained when MC was reduced from 48% to 15%.…”

Section: Changes Of Mda Content In G Biloba Seeds During Desiccationmentioning

confidence: 99%

Changes in Seed Germination Ability, Lipid Peroxidation and Antioxidant Enzyme Activities of Ginkgo biloba Seed during Desiccation

Feng

Shen

Shi

et al. 2017

Forests

View full text Add to dashboard Cite

Abstract:With the aim of investigating the antioxidant system and germinability in response to the desiccation of Ginkgo biloba seeds, they were put in a drying room (25 ± 2% relative humidity, 25 • C) for 67 days. Results showed that the germination rate remained constant when seed moisture content (MC) decreased from 48% (fresh seeds) to 45.1%. However, when MC reached 40.1%, the germination percentage decreased from 92% to 50%. A significant positive correlation was observed between the MC and seed germination percentage (r = 0.910). The electrical conductivity was significantly increased during the initial desiccation (48-45.1%). Furthermore, both the superoxide dismutase (SOD) and peroxidase (POD) activity first reduced, then elevated to peak values before they declined again. POD activity rose earlier than SOD activity, indicating that the POD reaction was more desiccation-sensitive than the SOD. Significant negative correlations were observed between the MC and malondialdehyde (MDA) content (r = −0.619) and electrical conductivity (r = −0.745). Our collective results suggest that G. biloba seeds are highly sensitive to desiccation. Excessive desiccation could reduce the antioxidant enzyme activity of G. biloba seeds and intensify membrane lipid peroxidation, which causes the consequent reduction-or even the complete loss-of seed germinability.

show abstract

Section: Changes Of Mda Content In G Biloba Seeds During Desiccationmentioning

confidence: 99%

Changes in Seed Germination Ability, Lipid Peroxidation and Antioxidant Enzyme Activities of Ginkgo biloba Seed during Desiccation

Feng

Shen

Shi

et al. 2017

Forests

View full text Add to dashboard Cite

show abstract

“…Median water potential resulting in seed death was −5.1 ± 0.65 MPa ( SE , n = 150) for Scottish seeds and −16.2 ± 0.83 MPa for Greek seeds (Daws et al., ). The physiological and morphological changes that occur in seeds as they develop, pass through dormancy and germinate are described further by Musatenko, Generalova, Martyn, Vedenicheva, and Vasyuk (), Obroucheva, Lityagina, Novikova, and Sin'kevich (); Obroucheva, Sinkevich, and Lityagina (); and Obroucheva, Sinkevich, Lityagina, and Novikova ().…”

Section: Floral and Seed Charactersmentioning

confidence: 98%

“…minate are described further byMusatenko, Generalova, Martyn, Vedenicheva, and Vasyuk (2003), Obroucheva, Lityagina, Novikova, and Sin'kevich (2012);Obroucheva, Sinkevich, and Lityagina (2016);andObroucheva, Sinkevich, Lityagina, and Novikova (2017).…”

mentioning

confidence: 99%

Biological Flora of the British Isles:Aesculus hippocastanum

et al. 2019

View full text Add to dashboard Cite

This account presents information on all aspects of the biology of Aesculus hippocastanum L. (horse‐chestnut) that are relevant to understanding its ecological characteristics and behaviour. The main topics are presented within the standard framework of the Biological Flora of the British Isles: distribution, habitat, communities, responses to biotic factors, responses to environment, structure and physiology, phenology, floral and seed characters, herbivores and disease, history and conservation. Aesculus hippocastanum is a large deciduous tree native to the Balkan Peninsula. Native populations are small (<10,000 trees total) and apparently in decline, but the tree has been widely planted in gardens and streets across Europe and other temperate areas from the 17th century onwards. It was voted the UK's favourite tree in a 2017 poll. As a British neophyte, it is occasionally naturalised in open wooded habitats. Horse‐chestnut is renowned for the beauty of its large (up to 30 cm long), upright panicles of white flowers, and for the large seeds (up to 42 g each) used in the formerly common children's game of “conkers.” More recently, the triterpene glycosides, extractable from various plant parts but especially the seeds, have been widely used in medicine. In much of Europe, horse‐chestnut is affected by chestnut bleeding canker (caused by Pseudomonas syringae pv. aesculi), the horse‐chestnut leaf miner Cameraria ohridella and the leaf blotch fungus Guignardia aesculi. The canker is likely to lead to death of <10% individuals, but seeds of plants infested with the leaf miner are 40%–50% smaller, which may affect long‐term establishment in non‐planted areas.

show abstract

“…A vida útil das sementes recalcitrantes maduras é curta, entre perceber a oportunidade de germinação até a desidratação, pode haver rápida perda de viabilidade. Esta limitação fisiológica está intimamente relacionada com a especificidade ecológica de habitats arbóreos recalcitrantes (OBROUCHEVA et al, 2016).…”

Section: Introductionunclassified

Períodos de secagem na qualidade fisiológica de sementes de cacau

Pereira

David

Fgueiredo

et al. 2019

View full text Add to dashboard Cite

As sementes deAs sementes de cacau recém-colhidas apresentam elevado teor de água o que impede o armazenamento, devido à rápida perda da viabilidade e vigor. Diante do exposto, objetivou-se no presente trabalho avaliar a influência de diferentes períodos de secagem na qualidade fisiológica de sementes de cacau. O delineamento experimental utilizado foi o inteiramente casualizado com os tratamentos constituídos de quatro períodos de secagem das sementes (0, 24, 48 e 72 horas) com quatro repetições. As sementes foram extraídas dos frutos manualmente e com auxílio de uma peneira foram lavadas em água corrente até a completa remoção da polpa. Após o despolpamento, as sementes foram postas sobre papel toalha e submetidas à secagem em condições de laboratório (26°C), de acordo os tratamentos descritos anteriormente. Avaliou-se o teor de água, germinação, tempo médio de germinação, emergência de plântulas, índice de velocidade de emergência e comprimento de plântulas. Conclui-se que a secagem afetou as sementes de cacau, o que confirma sua sensibilidade à dessecação, com efeitos fisiológicos prejudiciais, em especial, períodos prolongados. As sementes de cacau apresentam comportamento recalcitrante, comprometendo a viabilidade e o vigor à medida que o seu teor de água é reduzido. A secagem até o período de 24 horas mantém alta viabilidade das sementes.

show abstract

Physiological aspects of seed recalcitrance: a case study on the treeAesculus hippocastanum

Cited by 42 publications

References 100 publications

Changes in Seed Germination Ability, Lipid Peroxidation and Antioxidant Enzyme Activities of Ginkgo biloba Seed during Desiccation

Changes in Seed Germination Ability, Lipid Peroxidation and Antioxidant Enzyme Activities of Ginkgo biloba Seed during Desiccation

Biological Flora of the British Isles:Aesculus hippocastanum

Períodos de secagem na qualidade fisiológica de sementes de cacau

Contact Info

Product

Resources

About