Acid treatment combined with high light leads to increased removal efficiency of Ulva prolifera

The attachment of Ulva prolifera to Pyropia rafts can cause severe economic losses during the cultivation of Pyropia because it can reduce the yield, harvest, and quality of the Pyropia. The existing methods for removing U. prolifera from the Pyropia raft have many limitations, such as low removal e...

Full description

Bibliographic Details
Published in:Algal Research
Main Authors: Liu, Xuehua, Huan, Li, Gu, Wenhui, Gao, Shan, Zheng, Zhenbing, Wang, Guangce
Format: Report
Language:English
Published: ELSEVIER 2020
Subjects:
Cyt b(6)f complex
Light damage
Non-photochemical quenching
Photoprotection
Biotechnology & Applied Microbiology
CYCLIC ELECTRON FLOW
PHOTOSYSTEM-I
CHLAMYDOMONAS-REINHARDTII
OCEAN ACIDIFICATION
QUANTUM YIELD
GREEN-ALGAE
YELLOW SEA
PHOTOINHIBITION
PROTEIN
Psi
Ocean acidification
Online Access:http://ir.qdio.ac.cn/handle/337002/164489
https://doi.org/10.1016/j.algal.2019.101745
Description
Summary:The attachment of Ulva prolifera to Pyropia rafts can cause severe economic losses during the cultivation of Pyropia because it can reduce the yield, harvest, and quality of the Pyropia. The existing methods for removing U. prolifera from the Pyropia raft have many limitations, such as low removal efficiency, Pyropia damage, and environmental pollution. In this study, we developed method that can effectively remove U. prolifera attached to the raft during Pyropia cultivation. After 3 h of citric acid (pH 4.0) and high light treatment (1200 mu mol photons m(2-) s(1-)), followed by recovery in seawater for 24 h, the U. prolifera was completely dead, but the Pyropia was still active. We also studied the response mechanism of U. prolifera to acid and high light, and our results showed that under acidic and high light conditions, H+ may penetrate the interior of U. prolifera cells, causing obvious synergistic injury with high light to PSII in U. prolifera. The degradation of Cyt f in this process severely hindered electron transport and slightly reduced PSI activity. Acid also destroyed the U. prolifera photoprotective mechanism, as shown by the high non-photochemical quenching (NPQ) values and xanthophyll cycle pigment contents. This study provides a solid base for further research on optimizing the treatment of U. prolifera and improving its removal efficiency.

Similar Items