典型文献
Autophagic pathway contributes to low-nitrogen tolerance by optimizing nitrogen uptake and utilization in tomato
文献摘要：
Autophagy is a primary process involved in the degradation and reuse of redundant or damaged cytoplasmic components in eukaryotes.Autophagy has been demonstrated to facilitate nutrient recycling and remobilization by delivering intracellular materials to the vacuole for degradation in plants under nutrient starvation.However,the role of autophagy in nitrogen(N)uptake and utilization remains unknown.Here,we report that the ATG6-dependent autophagic pathway regulates N utilization in tomato(Solanium lycopersicum)under low-nitrogen(LN)conditions.Autophagy-disrupted mutants exhibited weakened biomass production and N accumulation compared with wild-type(WT),while ATG6 overexpression promoted autophagy and biomass production under LN stress.The N content in atg6 mutants decreased while that in ATG6-overexpressing lines increased due to the control of N transporter gene expression in roots under LN conditions.Furthermore,ATG6-dependent autophagy enhanced N assimilation efficiency and protein production in leaves.Nitrate reductase and nitrite reductase activities and expression were compromised in atg6 mutants but were enhanced in ATG6-overexpressing plants under LN stress.Moreover,ATG6-dependent autophagy increased plant carbon fixation and photosynthetic capacity.The quantum yield of photosystem Ⅱ,photosynthetic N use efficiency and photosynthetic protein accumulation were compromised in atg6 mutants but were restored in ATG6-overexpressing plants.A WT scion grafted onto atg6 mutant rootstock and an atg6 scion grafted onto WT rootstock both exhibited inhibited LN-induced autophagy and N uptake and utilization.Thus,ATG6-dependent autophagy regulates not only N uptake and utilization as well as carbon assimilation but also nutrient recycling and remobilization in tomato plants experiencing LN stress.
文献关键词：
中图分类号：
作者姓名：
Jiajian Cao;Xuelian Zheng;Dongling Xie;Hui Zhou;Shujun Shao;Jie Zhou
作者机构：
College of Horticulture,Hunan Agricultural University,Nonda Road 1,Changsha,410128,China;Department of Horticulture/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology,Zhejiang University,Yuhangtang Road 866,Hangzhou,310058,China;Key Laboratory of Horticultural Plants Growth,Development and Quality Improvement,Agricultural Ministry of China,Yuhangtang Road 866,Hangzhou,310058,China
文献出处：
引用格式：
[1]Jiajian Cao;Xuelian Zheng;Dongling Xie;Hui Zhou;Shujun Shao;Jie Zhou-.Autophagic pathway contributes to low-nitrogen tolerance by optimizing nitrogen uptake and utilization in tomato)[J].园艺研究（英文）,2022(01):336-351
A类：
Solanium,atg6,scion,rootstock
B类：
Autophagic,pathway,contributes,low,nitrogen,tolerance,by,optimizing,uptake,utilization,tomato,Autophagy,primary,process,involved,degradation,reuse,redundant,damaged,cytoplasmic,components,eukaryotes,has,been,demonstrated,facilitate,nutrient,recycling,remobilization,delivering,intracellular,materials,vacuole,plants,under,starvation,However,role,autophagy,remains,unknown,Here,report,that,ATG6,dependent,autophagic,regulates,lycopersicum,LN,conditions,disrupted,mutants,exhibited,weakened,biomass,production,accumulation,compared,wild,type,WT,while,overexpression,promoted,stress,content,decreased,overexpressing,lines,increased,due,control,transporter,gene,Furthermore,enhanced,assimilation,efficiency,protein,leaves,Nitrate,reductase,nitrite,activities,were,compromised,Moreover,carbon,fixation,photosynthetic,capacity,quantum,yield,photosystem,restored,grafted,onto,both,inhibited,induced,Thus,not,only,well,also,experiencing
AB值：
0.439785
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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。
