Genetic and molecular mechanisms underlying nitrogen use efficiency in maize

Area of Science:

• Agricultural Science
• Plant Physiology
• Molecular Biology

Background:

• Nitrogen (N) is essential for crop productivity and quality.
• Excessive nitrogen fertilizer use incurs high costs and environmental damage.
• Improving nitrogen use efficiency (NUE) in maize is a key agricultural challenge.

Purpose of the Study:

• To synthesize the genetic and molecular regulation of nitrogen uptake, assimilation, and remobilization in maize.
• To highlight key genes, metabolic pathways, and plant-microbe interactions influencing maize NUE.
• To identify strategies for enhancing nitrogen utilization in maize for sustainable agriculture.

Main Methods:

• Literature review and synthesis of existing research on nitrogen metabolism in maize.
• Analysis of genetic and molecular mechanisms governing nitrogen transport, assimilation, and remobilization.
• Exploration of the role of root system architecture and rhizosphere microbiome in NUE.

Main Results:

• Identified key genetic regulators of nitrate and ammonium transport for efficient N uptake.
• Elucidated molecular mechanisms of root adaptation to nitrogen distribution.
• Detailed the impact of rhizosphere microorganisms and plant-microbe interactions on maize NUE.
• Summarized intricate regulatory networks of N assimilation and remobilization, including signaling pathways.

Conclusions:

• Improving maize NUE requires an integrative approach combining genetic diversity and synthetic biology.
• Understanding complex regulatory mechanisms is vital for developing sustainable agricultural practices.
• Targeting nitrogen transport, assimilation, remobilization, and plant-microbe interactions can enhance crop yield and reduce environmental footprint.