Influence of Sugarcane Variety on Rhizosphere Microbiota Under Irrigated and Water-Limiting Conditions

Author(s)

Pereira, Leticia B. ; de Oliveira Gambarini, Victor Marques ; de Menezes, Alexandre Barretto ; Ottoboni, Laura M. M. ; Vicentini, Renato

• Document type: Journal article
• Source: Current Microbiology; v. 79, n. 9, p. 10-pg., 2022-09-01.

Abstract

Drought is one of the main problems linked to climate change that is faced by agriculture, affecting various globally important crops, including sugarcane. Environmentally sustainable strategies have been sought to mitigate the effects of climate change on crops. Among them, the use of beneficial microorganisms offers a promising approach. However, it is still necessary to understand the mechanisms that regulate plant-microorganism interactions, in normal situations and under stress. In this work, the rhizosphere metagenomes of two sugarcane varieties, one resistant and the other susceptible to drought, were compared under normal conditions and under water-limiting conditions. The results showed that for the drought-resistant sugarcane variety, bacteria belonging to the order Sphingomonadales and the family Xanthomonadaceae presented increased activities in terms of mobility, colonization, and cell growth. In contrast, the rhizosphere associated with the drought-sensitive variety exhibited increases of bacteria belonging to the family Polyangiaceae, and the genus Streptomyces, with modifications in DNA metabolism and ribosome binding proteins. The results pointed to variation in the rhizosphere microbiota that was modulated by the host plant genotype, revealing potential bacterial candidates that could be recruited to assist plants during water-limiting conditions. (AU)

• FAPESP's process: 14/05929-0 - Impact of elevated concentration of CO2 and water stress in the microbiota associated with sugarcane rhizosphere
• Grantee: Letícia Bianca Pereira
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 15/00408-5 - Effects of elevated concentration of CO2 and water stress in the microbiota associated with sugarcane rhizosphere
• Grantee: Renato Vicentini dos Santos
• Support Opportunities: Research Program on Global Climate Change - Regular Grants
• FAPESP's process: 16/08994-3 - Analysis of the metatranscriptome of sugarcane rhizosphere subjected to water stress
• Grantee: Victor Marques de Oliveira Gambarini
• Support Opportunities: Scholarships in Brazil - Master