Assessment of agro-physiological and biochemical markers for drought tolerance in onion (Allium cepa L.) genotypes during bulb development.

ABSTRACT: Drought is a major constraint that limits onion productivity. This current study explored the physio-biochemical, morphological, and yield attributes of 14 onion genotypes during the bulb development stage under drought conditions. A greenhouse experiment was conducted using a Completely Randomized Design (CRD) with four replications and two treatments. Drought stress was applied for a duration of 30 days. Drought reduced all morpho-physiological parameters of onion genotypes compared to the control. Drought significantly increased (p < 0.001) hydrogen peroxide (H₂O₂) levels in onion plants. The genotypes Goudami and Prema showed higher levels of catalase and ascorbate peroxidase. Additionally, Prema and Goudami exhibited the highest proline content, while Red_Creole

SUBMITTER: Sansan OC 

PROVIDER: S-EPMC12533139 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature