How tree species fill geographic and ecological space
Ricklefs analyses local assemblages of deciduous trees and finds that the forests in question do not appear to be saturated with species.
annals-of-botany
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Phylogeny and evolution of Cyperus esculentus
Results suggest that tiger nut probably originated in the late Cenozoic in Africa and reached the Americas repeatedly, independently of Columbian exchanges.
Pollinators and maintaining variation in flower colour
This study uses dual choice assays and experimental arrays of blue and white flowers to determine pollinators’ preference for flower colour in Aquilegia.
Stomata and atmospheric CO2 in bryophytes
This study strengthens the hypothesis of incremental rather than early acquisition of stomatal regulatory processes through land plant evolution.
Fast-growing trees rely on reserves for new spring growth
Uscola et al. use isotope labeling to study carbon and nitrogen movements in new spring growth in seedlings of 4 coexisting Mediterranean evergreen trees.
Mechanisms for ethylene-induced aerenchyma formation
Results suggest that ethylene is perceived in all maize root tissues and cortical-cell-specific PCD is controlled downstream of ethylene perception.
Programmed cell death in cryo-exposed embryonic axes
A study of silver maple cools embryonic axes to liquid nitrogen temperatures without prior dehydration or cryoprotection treatments and thaws them rapidly.
Sediment seed banks in freshwater sandstone rock pools
Results suggest that sediment seed banks may represent a significant driver of species persistence in these ecosystems.
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