What kind of seed dormancy occurs in the legume genus Cassia?

Scientific Reports
Ailton G Rodrigues-JuniorOrlando C De-Paula

Abstract

Cassia is a diverse legume genus widespread in the (sub-)tropical zone of the world. Several studies have been done on this genus; however, significant changes have occurred at the taxonomic level over the years. This has led to inaccurate information about seed dormancy in Cassia since many species are no longer included in the genus. Thus, our work aims to investigate and update the information about the kind of dormancy that occurs in seeds of Cassia species and also look into two notorious species in this group (C. fistula and C. javanica) to compare myxospermous vs. non-myxospermous seeds regarding dormancy and germination traits. Seed dormancy reports were found for 53 Cassia species, and the only kind of seed dormancy found for these species was physical dormancy (PY). Non-dormancy was not found, and all seeds had a blockage to water uptake during the dormant state, that is, all have PY. Of these 53 species, only 18 are currently included in the genus Cassia. C. fistula and C. javanica have fully developed embryos, and dormancy is only conferred by the (water-impermeable) seed coat. The lens in the seed coat is the only structure that creates a water pathway to break PY in C. fistula. Myxospermous seeds came out of dorma...Continue Reading

References

Jul 27, 2006·The New Phytologist·William E Finch-Savage, Gerhard Leubner-Metzger
Jan 1, 1982·Science·D H Janzen, P S Martin
Dec 23, 2008·Annals of Botany·K M G Gehan JayasuriyaCarol C Baskin
Dec 8, 2010·Evolution; International Journal of Organic Evolution·Brigitte Marazzi, Michael J Sanderson
Apr 2, 2014·The New Phytologist·Charles G WillisUNKNOWN NESCent Germination Working Group
Aug 10, 2018·PloS One·Ailton G Rodrigues-JuniorQueila S Garcia
Jan 1, 2019·Annals of Botany·Ailton G Rodrigues-JuniorQueila S Garcia
Mar 21, 2019·Annals of Botany·L Felipe DaibesAlessandra Fidelis

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