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  • cyanobacteria
  • We also found that the transcription patterns in UCYN-A are more similar to those in marine cyanobacteria that are capable of aerobic N 2 fixation in the light, such as Trichodesmium and heterocyst-forming cyanobacteria, than to those in Crocosphaera or Cyanothece species, which are more closely related to unicellular marine cyanobacteria evolutionarily. (asm.org)
  • photosynthetic apparatus
  • The regulation of the photosynthetic apparatus in this interesting microalgae has been deeply discussed in Section B. Our study focused firstly on the acclimation response in Nannochloropsis gaditana subjected to prolonged exposition to low and high light. (unipd.it)
  • The influence on NPQ seems to be related mostly on de novo synthesis of zeaxanthin while the molecules already present in the photosynthetic apparatus are involved in a transient NPQ active only in the first minute after the dark-light transition. (unipd.it)
  • molecules
  • Interestingly zeaxanthin molecules are found to be constitutively present in this microalga, even in conditions of very low light in which the xanthophyll cycle is not yet induced. (unipd.it)
  • Mutants
  • In studies presented here, under fluctuating high light, growth of young seedlings lacking PsbS is retarded, and PSII in detached leaves of the mutants is more sensitive to photoinhibitory illumination compared with the wild type. (biomedcentral.com)
  • chlorophyll
  • However, because excess light is harmful, plants engage several protective mechanisms, including non-photochemical quenching (NPQ) of chlorophyll (Chl) fluorescence. (biomedcentral.com)
  • genes
  • Over-represented in light-induced cotyledon and root common genes and root-specific genes (Jiao et al. (gifu-u.ac.jp)
  • Responses
  • Chazdon, R.L. and Pearcy, R.W., Photosynthetic Responses to Light Variation in Rain Forest Species: 1. (springer.com)
  • Cells grown in high light also show increased photosynthetic electron transport, paralleled by an increased contribution of cyclic electron transport around Photosystem I. Even when exposed to extreme light intensities, Nannochloropsis cells do not activate photo-protection responses, such as NPQ and the xanthophyll cycle in a constitutive way. (unipd.it)
  • These results suggest NPQ and the xanthophyll cycle in Nannochloropsis gaditana play exclusive roles in response to short-term changes in illumination but only play a slight role, if any, in responses to chronic light stress. (unipd.it)
  • mechanisms
  • For instance, when using an ultrafast laser one can generate a 2 9 10-14 s long flash of light so as to study kinetics and mechanisms of the primary processes of light energy storage. (slideshare.net)
  • quantum
  • This process is initiated by a quantum of light, and this fact makes it possible to use modern physical instru- mentation for the analysis of its mechanism. (slideshare.net)
  • high
  • For instance the so called non photochemical quenching of fluorescence (NPQ) acts dissipating excess energy as heat and it's used as short term response to high light in order to avoid oxidative damages. (unipd.it)
  • visible
  • Moreover, a system that can perform multiple turnovers is required, because even the energy contained in a single photon of visible light is not sufficient for many biochemical reactions. (schoolbag.info)