Strategies for engineering improved nitrogen use efficiency in crop plants via redistribution and recycling of organic nitrogen

被引:19
|
作者
Melino, Vanessa J. [1 ]
Tester, Mark A. [1 ]
Okamoto, Mamoru [2 ]
机构
[1] King Abdullah Univ Sci & Technol KAUST, Div Biol & Environm Sci & Engn BESE, Thuwal 239556900, Saudi Arabia
[2] Univ Adelaide, Sch Agr Food & Wine Waite Res Precinct, Glen Osmond, SA 5064, Australia
关键词
PROTEIN-CONTENT LOCUS; GRAIN PROTEIN; NITRATE TRANSPORTER; YIELD; SENESCENCE; WHEAT; REMOBILIZATION; EXPRESSION; AUTOPHAGY; GROWTH;
D O I
10.1016/j.copbio.2021.09.003
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Global use of nitrogen (N) fertilizers has increased sevenfold from 1960 to 1995 but much of the N applied is lost to the environment. Modifying the temporal and spatial distribution of organic N within the plant can lead to improved grain yield and/ or grain protein content for the same or reduced N fertilizer inputs. Biotechnological approaches to modify whole plant distribution of amino acids and ureides has proven successful in several crop species. Manipulating selective autophagy pathways in crops has also improved N remobilization efficiency to sink tissues whilst the contribution of ribophagy, RNA and purine catabolism to N recycling in crops is still too early to foretell. Improved recycling and remobilization of N must exploit N-stress responsive transcriptional regulators, N sensing or phloem-localized promotors and genetic variation for N-responsive traits.
引用
收藏
页码:263 / 269
页数:7
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