Hyponastic leaf growth decreases the photoprotective demand, prevents damage to photosystem II and delays leaf senescence in Salvia broussonetii plants.

@article{Abreu2008HyponasticLG,
  title={Hyponastic leaf growth decreases the photoprotective demand, prevents damage to photosystem II and delays leaf senescence in Salvia broussonetii plants.},
  author={Maria Elizabeth Abreu and Sergi Munn{\'e}-Bosch},
  journal={Physiologia plantarum},
  year={2008},
  volume={134 2},
  pages={369-79}
}
The influence of leaf angle on the response of plants to high light was studied in Salvia broussonetii, a species endemic of the Canary Islands that shows hyponastic leaf growth. The response of vertical, naturally oriented leaves was compared with that of horizontal, artificially held leaves for 1, 13, 24 and 29 days in terms of photoinhibition [efficiency of photosystem II (PSII)], photoprotection (by the xanthophyll cycle, alpha-tocopherol and beta-carotene) and progression of leaf… CONTINUE READING