Yiannis Manetas

TL;DR: It is suggested that the importance of a photoprotective anthocyanic screen is low in thin, young leaves with low chlorophyll concentrations because the green light attenuated by Anthocyanins is less significant for chlorophyLL excitation.

TL;DR: It may be concluded that P. fruticosa leaves avoid severe photoinhibitory and oxidative damage during the long, warm, dry and sunny Mediterranean summer by reducing light harvesting and electron flow capacity, whilst maintaining an adequate photoprotective ability.

TL;DR: An interdisciplinary summary of the current body of knowledge on autumn colours is provided, and unresolved issues and future avenues of research are discussed that might help reveal the evolutionary meaning of this spectacle of nature.

TL;DR: The more ecological, anti-herbivore hypotheses, consider red leaf color as a signal denoting high defensive commitment, as a camouflage obscuring the green reflectance indicative of a healthy leaf and/or as a device undermining the folivorous insects camouflage.

TL;DR: Pubescence layers with their native structure and orientation were isolated from the leaves of Olea europaea and Olea chrysophylla and were characterized as phenolics with considerable flavonoid contribution, suggesting that leaf hairs, besides other functions, may constitute a shield against UV-B radiation.