Biology Postdoctoral Exit Report: Gracilaria Response to Cs and Sr Stress

Talk Details

Item	Details
Title	Physiological, Biochemical and Transcriptomic Responses of Gracilaria lemaneiformis under Different Concentrations of Cesium and Strontium Stress
Speaker	Muhamad Syaifudin (Supervisor: Prof. Du Hong)
Time	May 30 (Saturday), 2:00–3:00 PM
Venue	Admin Building East, Room E401

Abstract

This study investigates the response mechanisms of the economic red alga Gracilaria lemaneiformis to cesium (Cs) and strontium (Sr) stress. Key findings: under Cs stress, the alga exhibits a strict dose-dependent defense mode (low-dose “active braking” to reduce energy consumption; acute toxicity causing photosynthetic collapse); under Sr stress, a three-stage response occurs — brief growth promotion, protein degradation, and eventual transformation into a passive “mineral sponge” state with Sr accumulation up to 45-fold.

The results suggest Gracilaria has potential as an early warning bioindicator for coastal radioactive pollution and highlight risks of radionuclide transfer in mariculture (e.g., using Gracilaria as abalone feed).

Source: STU OA Notice (Biology Postdoctoral Research Station)