| Effects of light environment on the induction of chlorophyll fluorescence in leaves: A comparative study of Tradescantia species of different ecotypes. | |
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MedLine Citation:
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PMID: 21419191 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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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 (T. albiflora, T. fluminensis, T. navicularis, and T. 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 (q(NPQ)) determined by energy losses in the light-harvesting antenna of photosystem 2 (PS2), and PS2 operating efficiency (Φ(PSII)). Comparative study of light-induced changes in q(NPQ) and Φ(PSII) 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. |
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Authors:
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O P Samoilova; V V Ptushenko; I V Kuvykin; S A Kiselev; O S Ptushenko; A N Tikhonov |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-15 |
Journal Detail:
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Title: Bio Systems Volume: - ISSN: 1872-8324 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-22 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0430773 Medline TA: Biosystems Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011. Published by Elsevier Ireland Ltd. |
Affiliation:
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Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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