Morphophysiological dormancy in the basal angiosperm order Nymphaeales.

ABSTRACT:

Background and aims

Substantial evidence supports the hypothesis that morphophysiological dormancy (MPD) is the basal kind of seed dormancy in the angiosperms. However, only physiological dormancy (PD) is reported in seeds of the ANA-grade genus Nymphaea. The primary aim of this study was to determine the kind of dormancy in seeds of six species of Nymphaea from the wet-dry tropics of Australia.

Methods

The effects of temperature, light and germination stimulants on germination were tested on multiple collections of seeds of N. immutabilis, N. lukei, N. macrosperma, N. ondinea, N. pubescens and N. violacea. Embryo growth prior to hypocotyl emergence was monitored.

Key results

Germination was generally <10 % after 28 d in control treatments. Germination percentage was

SUBMITTER: Dalziell EL 

PROVIDER: S-EPMC6344092 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature