Abstract:
:Nitrogen (N) is essential for plant growth and crop productivity. Organic N is a major form of remobilized N in plants' response to N limitation. It is necessary to understand the regulatory role of N limitation adaption (NLA) in organic N remobilization for this adaptive response. Transcriptional and proteomic analyses were integrated to investigate differential responses of wild-type (WT) and nla mutant plants to N limitation and to identify the core organic N transporters targeted by NLA. Under N limitation, the nla mutant presented an early senescence with faster chlorophyll loss and less anthocyanin accumulation than the WT, and more N was transported out of the aging leaves in the form of amino acids. High-throughput transcriptomic and proteomic analyses revealed that N limitation repressed genes involved in photosynthesis and protein synthesis, and promoted proteolysis; these changes were higher in the nla mutant than in the WT. Both transcriptional and proteomic profiling demonstrated that LHT1, responsible for amino acid remobilization, were only significantly upregulated in the nla mutant under N limitation. These findings indicate that NLA might target LHT1 and regulate organic N remobilization, thereby improving our understanding of the regulatory role of NLA on N remobilization under N limitation.
journal_name
Int J Mol Scijournal_title
International journal of molecular sciencesauthors
Liao Q,Tang TJ,Zhou T,Song HX,Hua YP,Zhang ZHdoi
10.3390/ijms21062171subject
Has Abstractpub_date
2020-03-21 00:00:00issue
6issn
1422-0067pii
ijms21062171journal_volume
21pub_type
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