Physiological seed dormancy of Ruschia imbricata and Ruschia uitenhagensis (Aizoaceae) is broken by dry heat and unaffected by seasonality

Benabdallah Aminaa, Betina Soumeyab,Bouchentouf Salim,Boumendjel Mahieddine,Bechkri Sakina,Bensouici Chawki,Nicoli Francesca,Vergine Marzia,Negro Carmine, De Bellis Luigi

South African Journal of Botany（2022）

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摘要

•Ruschia imbricata and Ruschia uitenhagensis have physiological seed dormancy.•Primary seed dormancy depth differs between populations of R. imbricata.•Seed harvest time does not affect dormancy depth or breaking in R. imbricata.•Seed dormancy is broken by dry heat, with germination increasing > 50% on average.•Dry heat does not enhance seed permeability to high molecular weight compounds.

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关键词

Dormancy depth,Dry heat,Germination,Mesembryanthemaceae,Seed harvest time,South Africa

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