The aim of this study was to evaluate the effect of pre-treatments on overcoming dormancy of A. coriacea seeds. Seeds were processed and stored in polyethylene bags at temperatures of at -18°C (42% RH), 5°C (34% RH), 15°C (60% RH) and 25°C (34% RH), during 0, 30, 60, 90, 120 and 150 days. After storage, seeds were immersed in 350 mg.L-1 gibberellic acid for 144 hours. Sowing was carried out in ...

Context Seed dormancy is one issue hindering implementation of conservation actions for rainforest species. Aims We studied and germination in Tasmannia sp. Mt Bellenden Ker membranea, two tropical montane species threatened by climate change, to develop a better understanding the genus. Methods Dormancy was classified T. on basis an imbibition test, analysis embryo seed length (E:S) ratios res...

Mechanisms controlling germination of > 2600 Arecaceae species adapted to the tropical forests are not clearly understood. This contribution underpins notion that coexistence dormancy and desiccation sensitivity in some could significantly affect ecology. Although evolutionary ecological significance behind this occurrence is unknown, these traits together limit from inappropriate depths allow ...

Cultivar registration agencies typically require morphophysiological trait-based distinctness of candidate cultivars. This requirement is difficult to achieve for cultivars of major perennial forages because of their genetic structure and ever-increasing number of registered material, leading to possible rejection of agronomically valuable cultivars. This study aimed to explore the value of mol...

The timing of seed germination significantly affects the fitness and life cycle plants. Torilis scabra is a perennial medicinal herb occurring in mixed forests but increasing use modification forestlands recent decades has led to degeneration its natural habitat. Nonetheless, requirements for T. remain unclear. present study focused on identifying conditions necessary break dormancy describing ...

Abstract Generally, orchids produce dust-like seeds in which endosperm reduction and embryo undifferentiation represent a derived state shared with species about 11 other plant families. Orchid are proposed to have special kind of morphological or morphophysiological dormancy. We test this proposition, overcoming several design limitations earlier studies, specifically that the vitro germinatio...