Influence of Exogenous Melatonin on the Physiological Traits of Camellia hainanica Seedlings Under Polyethylene Glycol-Induced Drought Stress

Plants, Journal Year: 2025, Volume and Issue: 14(5), P. 676 - 676

Published: Feb. 22, 2025

This study investigated the effects of exogenous melatonin (MT) on physiological responses Camellia hainanica seedlings under drought stress, using drought-tolerant variety “Hai Da 1” and drought-sensitive “Wan Hai as test materials. Seedlings were treated with MT at concentrations 0, 50, 100, 150, 200, 250 μmol/L through irrigation, followed by stress induced polyethylene glycol (PEG-6000). The results revealed that alleviated growth damage caused PEG-simulated leaf relative conductivity malondialdehyde (MDA) content showing an initial decrease increase concentration rose. In contrast, water content, chlorophyll antioxidant enzyme activity, secondary metabolite levels, carbohydrate initially increased then declined increasing concentration. Treatment 200 notably reduced MDA 40–50%, enhanced activity 20–30%, levels 11–42% in variety. These findings identified optimal for mitigating C. seedlings, providing a foundation its practical application production further research into resistance mechanisms mediated MT.

Language: Английский

Genome-wide identification of MYB gene family and exploration of selenium metabolism-related candidates in paper mulberry (Broussonetia papyrifera)

Plant Cell Reports, Journal Year: 2025, Volume and Issue: 44(4)

Published: March 25, 2025

Language: Английский