Economic network

Study reveals energy reassignment network in Litopenaeus vannamei sensitive to heat stress

Schematic illustration of separate responses and energy reallocations between three tissues under heat stress. The red and blue rectangles or arrowheads represent up-regulated and down-regulated biological processes. Credit: IOCAS

High economic value and excellent breeding characteristics have allowed the Pacific white shrimp Litopenaeus vannamei to become one of the world’s leading aquaculture species. However, in summer, continuous hot weather or periodic temperatures above 35 degrees Celsius lead to high shrimp mortality rates. Therefore, it is necessary to study the mechanisms of L. vannamei in response to high temperature.

Recently, a research team led by Prof. Li Fuhua from the Institute of Oceanology, Chinese Academy of Sciences (IOCAS) provided new insights into the energy reallocation strategy in L. vannamei in response to the thermal stress.

The study was published in Ecotoxicology and environmental safety in May. 5.

Previous heat stress studies were limited to single tissues or only a few indicators. However, the spatial network of tissue cooperation and the relationship with energy in response to heat stress remains unclear.

In this study, the researchers conducted a comparative and robust transcriptomic analysis on three shrimp tissues under heat stress, including the hepatopancreas, gills and muscles. They found that energy-related genes were the main change genes, which inferred that energy flow could be reallocated between different tissues under heat stress.

“Understanding the cooperation of various animal tissues in response to heat stress is the basis for clarifying the regulatory mechanism of different species under heat stress,” said Dr. Zhang Xiaoxi, first author of the study.

“We find that different tissues can cooperate with each other simultaneously via energy reallocation in response to heat stress. Less energy was channeled into protein turnover in the gills and hepatopancreas for minimal maintenance of life, and more energy was required for the muscle to come out of adverse circumstances,” Professor Zhang said.

“This work not only provides a comprehensive understanding of the molecular mechanism of L. vannamei in response to high temperature, but also lays the groundwork for thermotolerance gene mining and offers effective strategies to cope with the high-temperature environment. temperature,” Professor Li said.

Mechanism of transcriptional regulation of clams against heat and hypoxic stress

More information:
Xiaoxi Zhang et al, Comparative transcriptomic analysis uncovers an energy reallocation network in Litopenaeus vannamei sensitive to heat stress, Ecotoxicology and environmental safety (2022). DOI: 10.1016/j.ecoenv.2022.113600

Provided by Chinese Academy of Sciences

Quote: Study Reveals Energy Reallocation Network in Litopenaeus vannamei Sensitive to Heat Stress (2022, May 9) Retrieved May 9, 2022 from reallocation-litopenaeus. html

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