Screening key sorghum germplasms for low-nitrogen tolerance at the seedling stage and identifying from the carbon and nitrogen metabolism.

ABSTRACT:

Introduction

Sorghum (Sorghum bicolor L.) can withstand drought and heat stress and efficiently utilize water and nutrients. However, the underlying mechanism of its tolerance to low-nitrogen (N) stress remains poorly understood.

Materials and methods

This study assessed low-N tolerance in 100 sorghum-inbred lines and identified those with exceptional resilience. Principal component analysis, Pearson's correlation, and Y value analysis were used to examine various seedling growth metrics, including plant and root dimensions, biomass, chlorophyll content, root N content, shoot N content, and root/shoot ratio.

Results and discussion

The genotypes were categorized into four distinct groups based on their respective Y values, revealing a spectrum from highly tolera

SUBMITTER: Liu C 

PROVIDER: S-EPMC11424420 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature