The control of floods over Echinochloa crus-galli seed dormancy and germination. Perception of environmental cues that break seed dormancy under hypoxic floodwaters

ECHEVERRY J; PERALTA OGOREK LL; MOLLARD FPO; STRIKER GG

Ratisbona

Conferencia; Functional Seed Ecology . VI Conference of the International Society for Seed Science; 2019

International Society for Seed Science

Quiescence is a well-known plant strategy aimed at increasing survival under complete submergence by conserving reserves to resume growth after water recedes. However, the significance of seed dormancy as a quiescence strategy to avoid lethal underwater germination and defer seedling growth until the post-flooding period has not been explored. We studied the control of hypoxic floodwaters on seed dormancy on an Echinochloa crus-galli accession whose seeds are not able to germinate under hypoxia. We carried out a series of experiments exposing seeds to sequential treatments consisting on light pulses and daily alternating temperatures in dormant seeds that were either submerged in hypoxic flasks (DO