Evaluation of Rice Genotypes under Propionate Stress

Abstract

The objective of the present work was to evaluate the response of 25 rice genotypes to propionate, a compound largely produced in low‐drainage and high‐organic matter‐content soils. The work was performed in hydroponics with four doses and a random block design with three replications. The variables measured were root (RL) and shoot (SL) length, number of roots (NR), and root (RDM) and shoot (SDM) dry matter. Analyses of variance, relative performance, and regression fitting were performed, showing significance for most variables. The variable RL was the most affected by propionate, and the use of this variable for screening genotypes indicated 6 tolerant and 19 sensitive genotypes. Most tolerant genotypes belonged to irrigated japonica.

Keywords:

• Abiotic stress
• organic acids
• Oryza sativa
• phytotoxicity