典型文献
Manganese toxicity-induced chlorosis in sugarcane seedlings involves inhibition of chlorophyll biosynthesis
文献摘要：
Manganese (Mn) toxicity-induced leaf chlorosis limits crop production in acidic soils, but its underlying mechanisms remain unknown. The effects of excessive Mn on chlorophyll (Chl) biosynthesis in sugarcane (Saccharum officinarum L.) leaves were investigated. Under Mn treatment, Chl concentration decreased with Mn accumulation and chlorosis appeared in expanding leaves. Before that, levels of the initial Chl precursor 5-aminolevulinic acid (ALA) and its downstream intermediates decreased, whereas magnesium-protoporphyrin IX monomethyl ester (MgPME) accumulated. Overaccumulation of Mn in leaves downregulated the ALA biosynthetic gene GluTR (encoding glutamyl-tRNA reductase) and MgPME conversion gene MgPMEC (encoding MgPME cyclase), upregulated the ALA biosynthesis inhibitor FLU (encoding FLUORESCENT), but had no significant effect on the expression of other Chl biosynthetic genes. The above Mn-induced changes of Chl precursors and expression of corresponding genes com-menced before the Chl decline and leaf chlorosis, and were reversed by ALA supplementation. Thus, excessive Mn-induced chlorosis in sugarcane is mediated by a Chl-biosynthesis disorder resulting from the inhibition of ALA synthesis and MgPME conversion.
文献关键词：
中图分类号：
作者姓名：
Shu Yang;Guizhi Ling;Qiuyue Li;Ke Yi;Xinlian Tang;Muqing Zhang;Xiaofeng Li
作者机构：
State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangxi Key Laboratory for Sugarcane Biology,College of Agriculture,Guangxi University,Nanning 530004,Guangxi,China;Institute for New Rural Development,Guangxi University,Nanning 530004,Guangxi,China
文献出处：
引用格式：
[1]Shu Yang;Guizhi Ling;Qiuyue Li;Ke Yi;Xinlian Tang;Muqing Zhang;Xiaofeng Li-.Manganese toxicity-induced chlorosis in sugarcane seedlings involves inhibition of chlorophyll biosynthesis)[J].作物学报（英文版）,2022(06):1674-1682
A类：
MgPME,Overaccumulation,GluTR,MgPMEC,FLUORESCENT,menced
B类：
Manganese,toxicity,induced,chlorosis,sugarcane,seedlings,involves,inhibition,chlorophyll,biosynthesis,Mn,leaf,limits,crop,production,acidic,soils,but,underlying,mechanisms,remain,unknown,effects,excessive,Chl,Saccharum,officinarum,leaves,were,investigated,Under,treatment,concentration,decreased,appeared,expanding,Before,that,levels,initial,aminolevulinic,ALA,downstream,intermediates,whereas,magnesium,protoporphyrin,IX,monomethyl,ester,accumulated,downregulated,biosynthetic,encoding,glutamyl,tRNA,reductase,conversion,cyclase,upregulated,inhibitor,had,significant,expression,other,genes,above,changes,precursors,corresponding,com,before,decline,reversed,by,supplementation,Thus,mediated,disorder,resulting,from
AB值：
0.487278
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