Exogenous Spermidine and Amino-Ethoxyvinylglycine Improve Nutritional Quality via Increasing Amino Acids in Rice Grains

Ying Liu, Yi Jiang, Xiaohan Zhong, Chaoqing Li, Yunji Xu, Kuanyu Zhu, Weilu Wang, Junfei Gu, Hao Zhang, Zhiqin Wang, Lijun Liu, Jianhua Zhang, Weiyang Zhang*, Jianchang Yang*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

Abstract

Polyamines and ethylene are key regulators of the growth and development, quality formation, and stress response of cereal crops such as rice. However, it remains unclear whether the application of these regulators could improve the nutritional quality via increasing amino acids in rice grains. This study examined the role of exogenous polyamines and ethylene in regulating amino acid levels in the milled rice of earlier-flowered superior grain (SG) and later-flowered inferior grain (IG). Two rice varieties were field grown, and either 1 mmol L−1 spermidine (Spd) or 50 μmol L−1 amino-ethoxyvinylglycine (AVG) was applied to panicles at the early grain-filling stage. The control check (CK) was applied with deionized water. The results showed that the Spd or AVG applications significantly increased polyamine (spermine (Spm) and Spd) contents and decreased ethylene levels in both SG and IG and significantly increased amino acid levels in the milled rice of SG and IG relative to the CK. Collectively, the application of Spd or AVG can increase amino acid-based nutritional quality and grain yield via increasing polyamine (Spm and Spd) contents and reducing ethylene levels in both SG and IG of rice.

Original languageEnglish
Article number316
Number of pages17
JournalPlants
Volume13
Issue number2
DOIs
Publication statusPublished - 2 Jan 2024

Scopus Subject Areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science

User-Defined Keywords

  • amino acid
  • ethylene
  • inferior grains
  • polyamine
  • rice
  • superior grains

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