‘Birth defects’ of photosystem II make it highly susceptible to photodamage during chloroplast biogenesis

Dmitry Shevela, Gennady Ananyev, Ann K. Vatland, Janine Arnold, Fikret Mamedov, Lutz A. Eichacker, G Charles Dismukes, Johannes Messinger

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

High solar flux is known to diminish photosynthetic growth rates, reducing biomass productivity and lowering disease tolerance. Photosystem II (PSII) of plants is susceptible to photodamage (also known as photoinactivation) in strong light, resulting in severe loss of water oxidation capacity and destruction of the water-oxidizing complex (WOC). The repair of damaged PSIIs comes at a high energy cost and requires de novo biosynthesis of damaged PSII subunits, reassembly of the WOC inorganic cofactors and membrane remodeling. Employing membrane-inlet mass spectrometry and O 2 -polarography under flashing light conditions, we demonstrate that newly synthesized PSII complexes are far more susceptible to photodamage than are mature PSII complexes. We examined these ‘PSII birth defects’ in barley seedlings and plastids (etiochloroplasts and chloroplasts) isolated at various times during de-etiolation as chloroplast development begins and matures in synchronization with thylakoid membrane biogenesis and grana membrane formation. We show that the degree of PSII photodamage decreases simultaneously with biogenesis of the PSII turnover efficiency measured by O 2 -polarography, and with grana membrane stacking, as determined by electron microscopy. Our data from fluorescence, Q B -inhibitor binding, and thermoluminescence studies indicate that the decline of the high-light susceptibility of PSII to photodamage is coincident with appearance of electron transfer capability Q A → Q B during de-etiolation. This rate depends in turn on the downstream clearing of electrons upon buildup of the complete linear electron transfer chain and the formation of stacked grana membranes capable of longer-range energy transfer.

Original languageEnglish
JournalPhysiologia Plantarum
DOIs
Publication statusPublished - Jan 1 2019

Fingerprint

Photosystem II Protein Complex
Chloroplasts
photosystem II
chloroplasts
Thylakoids
grana
Etiolation
Membranes
Polarography
etiolation
Electrons
Light
Water
Plastids
biogenesis
water
Energy Transfer
electron transport chain
energy costs
Hordeum

ASJC Scopus subject areas

  • Physiology
  • Genetics
  • Plant Science
  • Cell Biology

Cite this

Shevela, D., Ananyev, G., Vatland, A. K., Arnold, J., Mamedov, F., Eichacker, L. A., ... Messinger, J. (2019). ‘Birth defects’ of photosystem II make it highly susceptible to photodamage during chloroplast biogenesis. Physiologia Plantarum. https://doi.org/10.1111/ppl.12932

‘Birth defects’ of photosystem II make it highly susceptible to photodamage during chloroplast biogenesis. / Shevela, Dmitry; Ananyev, Gennady; Vatland, Ann K.; Arnold, Janine; Mamedov, Fikret; Eichacker, Lutz A.; Dismukes, G Charles; Messinger, Johannes.

In: Physiologia Plantarum, 01.01.2019.

Research output: Contribution to journalArticle

Shevela, Dmitry ; Ananyev, Gennady ; Vatland, Ann K. ; Arnold, Janine ; Mamedov, Fikret ; Eichacker, Lutz A. ; Dismukes, G Charles ; Messinger, Johannes. / ‘Birth defects’ of photosystem II make it highly susceptible to photodamage during chloroplast biogenesis. In: Physiologia Plantarum. 2019.
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