Effects of light environment on the induction of chlorophyll fluorescence in leaves: A comparative study of Tradescantia species of different ecotypes

O. P. Samoilova, V. V. Ptushenko, I. V. Kuvykin, S. A. Kiselev, O. S. Ptushenko, A. N. Tikhonov

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In this work, using a PAM-fluorimetry technique, we have compared effects of plant adaptation to the light or dark conditions on the kinetics of chlorophyll a fluorescence yield in Tradecantia leaves of several species (Tradescantia albiflora, Tradescantia fluminensis, Tradescantia navicularis, and Tradescantia sillamontana), which represent plants of different ecotypes. Two fluorescence parameters were used to assess photosynthetic performance in vivo: non-photochemical quenching (NPQ) of chlorophyll fluorescence (qNPQ) determined by energy losses in the light-harvesting antenna of photosystem 2 (PS2), and PS2 operating efficiency (ΦPSII). Comparative study of light-induced changes in qNPQ and ΦPSII has demonstrated that shade-tolerant Tradecantia species (T. albiflora Kunth, T. fluminensis Vell.) reveal higher capacities for NPQ and demonstrate slower transitions between the 'light-adapted' and 'dark-adapted' states than succulent species T. navicularis and T. sillamontana, which are typical habitats of semi-deserts. We analyze the photosynthetic performance of Tradescantia species in the context of their adaptabilities to variable environment conditions. The ability of shade-tolerant plants to retain a relatively long-term (∼40-60min) 'memory' for illumination history may be associated with the regulatory mechanisms that provide the flexibility of photosynthetic apparatus in response to fluctuations of light intensity.

Original languageEnglish
Pages (from-to)41-48
Number of pages8
JournalBioSystems
Volume105
Issue number1
DOIs
Publication statusPublished - Jul 1 2011
Externally publishedYes

Keywords

  • Ecotypes
  • Electron transport
  • Non-photochemical quenching
  • Photosynthesis
  • Tradescantia

ASJC Scopus subject areas

  • Statistics and Probability
  • Modelling and Simulation
  • Biochemistry, Genetics and Molecular Biology(all)
  • Applied Mathematics

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