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• W1986687462 endingPage "1742" @default.
• W1986687462 startingPage "1735" @default.
• W1986687462 abstract "Aminopeptidases play important role in the mobilization of storage proteins at the cotyledon during seed germination. It is often referred as inducible component of defense against herbivore attack. However the role of aminopeptidase in response to pathogen attack in germinating seeds is remained to be unknown. An attempt was made to analyze change in the aminopeptidase (EC 3.4.11.1) activity during germination of pigeonpea (Cajanus cajan L.) seeds by infecting the seeds with fungi. Two aminopeptidase activity bands (AP1 and AP2) were detected in control as well as infected pigeonpea seeds. During latter stages of germination in control seeds, AP1 activity was replaced by AP2 activity. However AP1 activity was significantly induced in germinating seeds infected with Fusarium oxysporum f.sp. ciceri and Aspergillus niger var. niger. The estimated molecular weights of AP1 and AP2 were ∼97 and 42.8kDa respectively. The induced enzyme was purified up to 30 fold by gel filtration chromatography. The purified enzyme was preferentially cleaved leucine p-nitroanilide than alanine p-nitroanilide. The enzyme was strongly inhibited by bestatin and 1,10-phenanthroline. Almost 50% of enzyme activity was inhibited by ethylene diamine tetra acetate. The purified enzyme showed broad pH optima ranging from pH 6.0 to 9.0 and optimum at pH 8.5. The induction of aminopeptidase activity during pigeonpea seed germination and in response to pathogen attack indicates significant involvement of these enzymes in primary as well as secondary metabolism of the seeds. These findings could be helpful to further dissect defensive role of aminopeptidases in seed germination which is an important event in plant's life." @default.
• W1986687462 created "2016-06-24" @default.
• W1986687462 creator A5041429222 @default.
• W1986687462 creator A5054203173 @default.
• W1986687462 date "2011-10-01" @default.
• W1986687462 modified "2023-09-24" @default.
• W1986687462 title "Changes and induction of aminopeptidase activities in response to pathogen infection during germination of pigeonpea (Cajanas cajan) seeds" @default.
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• W1986687462 doi "https://doi.org/10.1016/j.jplph.2011.05.002" @default.
• W1986687462 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21640431" @default.
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