典型文献
High non-photochemical quenching of VPZ transgenic potato plants limits CO2 assimilation under high light conditions and reduces tuber yield under fluctuating light
文献摘要：
Under natural conditions, photosynthesis has to be adjusted to fluctuating light intensities. Leaves exposed to high light dissipate excess light energy in form of heat at photosystem Ⅱ(PSII) by a process called non-photochemical quenching (NPQ). Upon fast transition from light to shade, plants lose light energy by a relatively slow relaxation from photoprotection. Combined overexpression of violaxanthin de-epoxidase (VDE), PSⅡ subunit S (PsbS) and zeaxanthin epoxidase (ZEP) in tobacco accelerates relaxa-tion from photoprotection, and increases pho-tosynthetic productivity. In Arabidopsis, ex-pression of the same three genes (VPZ) resulted in a more rapid photoprotection but growth of the transgenic plants was impaired. Here we report on VPZ expressing potato plants grown under various light regimes. Similar to tobacco and Arabidopsis, induction and relaxation of NPQ was accelerated under all growth con-ditions tested, but did not cause an overall increased photosynthetic rate or growth of transgenic plants. Tuber yield of VPZ expressing plants was unaltered as compared to control plants under constant light conditions and even decreased under fluctuating light conditions. Under control conditions, levels of the phyto-hormone abscisic acid (ABA) were found to be elevated, indicating an increased violaxanthin availability in VPZ plants. However, the in-creased basal ABA levels did not improve drought tolerance of VPZ transgenic potato plants under greenhouse conditions. The failure to benefit from improved photoprotection is most likely caused by a reduced radiation use efficiency under high light conditions resulting from a too strong NPQ induction. Mitigating this negative effect in the future might help to improve photosynthetic performance in VPZ expressing potato plants.
文献关键词：
中图分类号：
作者姓名：
Günter G.Lehretz;Anja Schneider;Dario Leister;Uwe Sonnewald
作者机构：
Department of Biology,Division of Biochemistry,Friedrich-Alexander-University Erlangen-Nürnberg,Staudtstrasse 5,Erlangen 91058,Germany;Plant Molecular Biology,Faculty of Biology,Ludwig Maximilians University of Munich,Gro?haderner Str.2-482152,Planegg-Martinsried,Munich,Germany
文献出处：
引用格式：
[1]Günter G.Lehretz;Anja Schneider;Dario Leister;Uwe Sonnewald-.High non-photochemical quenching of VPZ transgenic potato plants limits CO2 assimilation under high light conditions and reduces tuber yield under fluctuating light)[J].植物学报（英文版）,2022(09):1821-1832
A类：
VPZ,violaxanthin,PsbS,tosynthetic
B类：
High,photochemical,quenching,transgenic,potato,plants,limits,assimilation,under,high,light,conditions,reduces,tuber,yield,fluctuating,Under,natural,photosynthesis,has,adjusted,intensities,Leaves,exposed,dissipate,excess,energy,heat,photosystem,PSII,by,process,called,NPQ,Upon,fast,transition,from,shade,lose,relatively,slow,relaxation,photoprotection,Combined,overexpression,epoxidase,VDE,subunit,zeaxanthin,ZEP,tobacco,accelerates,increases,productivity,In,Arabidopsis,same,three,genes,resulted,more,rapid,but,growth,was,impaired,Here,report,expressing,grown,various,regimes,Similar,induction,accelerated,tested,did,not,overall,increased,photosynthetic,Tuber,unaltered,compared,control,constant,even,decreased,levels,phyto,hormone,abscisic,acid,ABA,were,found,elevated,indicating,availability,However,basal,drought,tolerance,greenhouse,failure,benefit,improved,most,likely,caused,reduced,radiation,efficiency,resulting,too,strong,Mitigating,this,negative,effect,future,might,help,performance
AB值：
0.484355
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
