Nitrogen topdressing timing modifies free amino acids profiles and storage protein gene expression in wheat grain.

ABSTRACT:

Background

Nitrogen is one basic element of amino acids and grain protein in wheat. In field experiments, wheat plants were subjected to different timing of nitrogen topdressing treatments: at the stages of emergence of the top fifth leaf (TL5), top third leaf (TL3) and top first leaf (TL1) to test the regulatory effects of nitrogen topdressing timing on grain protein quality. The underlying mechanisms were elucidated by clarifying the relationship between proteolysis in vegetative organs and accumulation of amino acids in the endosperm cavity, conversion of amino acids, and storage protein synthesis in endosperm of wheat grain.

Results

Delayed nitrogen topdressing up-regulated gene expression related to nitrogen metabolism and protease synthesis in the flag leaf, followed b

SUBMITTER: Zhong Y 

PROVIDER: S-EPMC6293556 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature