Seed dormancy distribution and ecology

Seed dormancy distribution and ecology

Seed dormancy dis­tri­bu­tion and ecology

In sea beet, Beta vul­garis ssp. mari­tima, seed dormancy largely con­trols ger­min­a­tion tim­ing, is highly her­it­able and var­ies geo­graph­ic­ally; cli­mate might select for this trait. Wagmann et al. assess geo­graph­ical vari­ation for seed dormancy among 85 sea beet pop­u­la­tions across the whole of France. Under con­trolled con­di­tions, they find a highly vari­able pro­por­tion of seeds to be dormant, and this fol­lows a geo­graph­ical pat­tern ran­ging from lower dormancy at high lat­it­udes to higher dormancy at low lat­it­udes. Regression points to sum­mer tem­per­at­ure as a plaus­ible select­ive factor. Whilst vari­ation in dormancy seems to stem in part from genetic dif­fer­en­ti­ation, mater­nal phen­o­typic plas­ti­city may also play a role.

Annals of Botany Office.

The Annals of Botany Office is based at the University of Leicester.

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