Physiological mechanisms for antagonistic interaction of manganese and aluminum in barley

Abstract

In a previous study, we found that the combined addition of Al and Mn in the culture solution could alleviate the inhibition of barley growth by addition of Al or Mn alone. The current experiment was conducted in a greenhouse to investigate the physiological mechanisms of the antagonistic interaction using two barley genotypes, XZ16 (both Al and Mn tolerant) and ZU9 (both Al and Mn sensitive). The treatments consisted of three Al levels (0, 0.1, and 0.5 mM) and three Mn levels (0, 0.2, and 1.0 mM) and their combinations, and a completely randomized block design was used with three replications. The combined treatments had larger plant biomass, lower Al and Mn concentrations and accumulation in plant tissues, lower malondialdehyde content, and higher root ATPases activities, compared with Al or Mn alone treatment. The two genotypes had the similar trend in the antagonistic interaction, with ZU9 being more predominant than XZ16.

Keywords:

• aluminum
• antagonism
• interaction
• manganese
• subcellular distribution

Additional information

Funding

This research was supported by Natural Science Foundation of China (31330055), China Agriculture Research System (CARS-05), and Jiangsu Collaborative Innovation Center for Modern Crop Production (JCIC-MCP).