Enhanced growth performance of abi5 plants under high salt and nitrate is associated with reduced nitric oxide levels

Quang Tri Le, Hai An Truong, Dinh Thanh Nguyen, Seonyoung Yang, Liming Xiong, Hojoung Lee

Research output: Contribution to journalArticlepeer-review


Numerous environmental stresses have a significant impact on plant growth and development. By 2050, it is anticipated that high salinity will destroy more than fifty percent of the world's agricultural land. Understanding how plants react to the excessive use of nitrogen fertilizers and salt stress is crucial for enhancing crop yield. However, the effect of excessive nitrate treatment on plant development is disputed and poorly understood; so, we evaluated the effect of excessive nitrate supply and high salinity on abi5 plant growth performance. We demonstrated that abi5 plants are tolerant to the harmful environmental conditions of excessive nitrate and salt. abi5 plants have lower amounts of endogenous nitric oxide than Arabidopsis thaliana Columbia-0 plants due to their decreased nitrate reductase activity, caused by a decrease in the transcript level of NIA2, a gene encoding nitrate reductase. Nitric oxide appeared to have a critical role in reducing the salt stress tolerance of plants, which was diminished by an excess of nitrate. Discovering regulators such as ABI5 that can modulate nitrate reductase activity and comprehending the molecular activities of these regulators are crucial for the application of gene-editing techniques. This would result in the appropriate buildup of nitric oxide to increase the production of crops subjected to a variety of environmental stresses.

Original languageEnglish
Article number154000
JournalJournal of Plant Physiology
Publication statusPublished - 2023 Jul

Bibliographical note

Funding Information:
This work was supported by grants from the National Research Foundation of Korea, South Korea (to Hojoung Lee, 2019; grant NRF-2019R1A2C1088417 ) and the Korea University, South Korea (Grant K2207591 ). Quang Tri Le thank the Huyndai Chung Mong-Koo Foundation for financial support ( FHS-20-010 ).

Publisher Copyright:
© 2023


  • ABI5
  • Abscisic acid
  • Arabidopsis
  • Nitrate reductase
  • Nitric oxide
  • Salt stress tolerance

ASJC Scopus subject areas

  • Physiology
  • Agronomy and Crop Science
  • Plant Science


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