Daily Archives: 7th of December 2011

More evidence found for quantum physics in photosynthesis

Via Scoop.itAnnBot

Physicists have found the strongest evidence yet of quantum effects fueling photosynthesis. Multiple experiments in recent years have suggested as much, but it’s been hard to be sure. Quantum effects were clearly present in the light-harvesting antenna proteins of plant cells, but their precise role in processing incoming photons remained unclear. In an experiment published Dec. 6 in Proceedings of the National Academy of Sciences, a connection between coherence—far-flung molecules interacting as one, separated by space but not time—and energy flow is established.

(PHH Editor note: I think not yet available 7 Dec; may eventually  be at http://dx.doi.org/10.1073/pnas.1105234108 )

Via arstechnica.com

Shoot apical meristem structure in oil palm

Shoot apical meristem structure in oil palm

Shoot apical meristem structure in oil palm

Oil palm (Elaeis guineensis) is an unbranched palm, possessing a single shoot apical meristem (SAM) that may remain active for more than 100 years. Through histological analysis and 3-D reconstructions, Jouannic et al. detail the SAM structural variations that occur during the oil palm life cycle, and find that development of the SAM is characterized by a juvenile-to-mature phase transition accompanied by establishment of a zonal pattern and modified shape. SAM zonation is dynamic during the plastochron period and displays distinct features compared with other monocots.