Identification of a slowly inducible zeaxanthin-dependent component of non-photochemical quenching of chlorophyll fluorescence generated under steady-state conditions in Arabidopsis
Identification of a slowly inducible zeaxanthin-dependent component of non-photochemical quenching of chlorophyll fluorescence generated under steady-state conditions in Arabidopsis
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DOI：
10.1016/j.bbabio.2010.01.001
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发表时间：
2010-04-01
影响因子：
4.3
通讯作者：
Jahns, Peter
中科院分区：
文献类型：
--
作者：
Nilkens, Manuela;Kress, Eugen;Jahns, Peter
研究了拟南芥在稳态条件下（即在饱和光强照射下长达90 min）非光化学猝灭（NPQ）的诱导和弛豫。除了表征良好的快速qE和非常慢的qI组分外，NPQ动力学分析还发现了玉米黄质（Zx）依赖组分qZ。qZ的形成（上升时间10 ~ 15 min）和弛豫（寿命10 ~ 15 min）分别与Zx的合成和环氧化有关。对拟南芥不同NPQ突变体的比较分析表明，qZ明显与qE、qT或qI无关，因此代表了一个独立的、依赖于zx的NPQ成分。(C) 2010 Elsevier B.V.版权所有
The induction and relaxation of non-photochemical quenching (NPQ) under steady-state conditions, i.e. during up to 90 min of illumination at saturating light intensities, was studied in Arabidopsis thaliana. Besides the well-characterized fast qE and the very slow qI component of NPQ, the analysis of the NPQ dynamics identified a zeaxanthin (Zx) dependent component which we term qZ. The formation (rise time 10-15 min) and relaxation (lifetime 10-15 min) of qZ correlated with the synthesis and epoxidation of Zx, respectively. Comparative analysis of different NPQ mutants from Arabidopsis showed that qZ was clearly not related to qE, qT or qI and thus represents a separate, Zx-dependent NPQ component. (C) 2010 Elsevier B.V. All rights reserved.