浙江农业学报 ›› 2024, Vol. 36 ›› Issue (1): 58-66.DOI: 10.3969/j.issn.1004-1524.20230230
何雨1(), 刘峰2,*(
), 张天乐3, 楼宝2, 魏福亮2, 叶挺2
收稿日期:
2023-02-25
出版日期:
2024-01-25
发布日期:
2024-02-18
作者简介:
何雨(1996—),女,四川内江人,硕士研究生,从事鱼类遗传育种研究。E-mail: 2412069997@qq.com
通讯作者:
* 刘峰,E-mail: lengfeng0210@126.com
基金资助:
HE Yu1(), LIU Feng2,*(
), ZHANG Tianle3, LOU Bao2, WEI Fuliang2, YE Ting2
Received:
2023-02-25
Online:
2024-01-25
Published:
2024-02-18
摘要:
为探究高温胁迫对小黄鱼(Larimichthys polyactis)肝脏组织结构和细胞凋亡的影响,研究通过人工控温,按照2 ℃·h-1的升温速率将水温从自然水温15 ℃升高至31 ℃(实验组)并维持此温度至96 h,同时设置15 ℃的常温对照组。分别于处理组水温达到31 ℃后的0、6、12、24、48、72、96 h时,同时采集处理组和对照组肝脏组织,进行组织切片观察肝脏组织的组织学变化,采用脱氧核糖核苷酸末端转移酶介导的缺口末端标记(TUNEL)法检测肝脏组织细胞凋亡情况。结果显示,31 ℃处理0 h时肝脏组织显微结构和超微结构与对照组相类似,无显著变化。但是,随着高温处理时间的延长,肝脏组织损伤逐渐加重,96 h后肝脏呈现严重损伤,表现为水肿、细胞核消失甚至溶解和肝组织局部坏死,以及肝细胞原有结构破坏等现象。此外,随着高温胁迫的持续,肝脏细胞凋亡现象逐渐加重。结果表明,高温胁迫对小黄鱼的肝脏组织造成一定程度的损害,并诱导大量细胞凋亡。研究结果明确了高温胁迫对小黄鱼肝脏组织的影响作用,对于小黄鱼养殖管理避免肝脏疾病发生具有重要的指导意义。
中图分类号:
何雨, 刘峰, 张天乐, 楼宝, 魏福亮, 叶挺. 高温胁迫对小黄鱼肝脏组织结构和细胞凋亡的影响[J]. 浙江农业学报, 2024, 36(1): 58-66.
HE Yu, LIU Feng, ZHANG Tianle, LOU Bao, WEI Fuliang, YE Ting. Histological study on the effect of high temperature stress on liver tissue in Larimichthys polyactis[J]. Acta Agriculturae Zhejiangensis, 2024, 36(1): 58-66.
图1 高温胁迫后小黄鱼肝脏显微结构变化(H.E 染色,400×) A,对照;B,高温处理0 h;C,高温处理6 h;D,高温处理12 h;E,高温处理24 h;F,高温处理48 h;G,高温处理72 h;H,高温处理96 h。CV,中央静脉;HC,肝细胞;BC,血细胞;VD,空泡;AB,淤血;N,细胞核;Oe,水肿;H,结构破坏。
Fig.1 Histology of Larimichthys polyactis liver after high temperature stress (H.E, 400×) A, Control; B, 0 h high temperature stress; C, 6 h high temperature stress; D, 12 h high temperature stress; E, 24 h high temperature stress; F, 48 h high temperature stress; G, 72 h high temperature stress; H, 96 h high temperature stress. CV, Central veins; HC, Hepatocyte; BC, Blood corpuscle; VD, Vacuolation; AB, Gore; N, Nucleus; Oe, Oedema; H, Structural damage.
图2 高温胁迫后小黄鱼肝脏超微结构变化(4 000×) A,对照;B,高温处理0 h;C,高温处理6 h;D,高温处理12 h;E,高温处理24 h;F,高温处理48 h;G,高温处理72 h;H, 高温处理96 h。RER,粗面内质网;M,线粒体;F,脂滴;SER,滑面内质网;L,脂褐质;PL,初级溶酶体;SL,次级溶酶体。
Fig.2 Ultrastructure of Larimichthys polyactis liver under high temperature stress(4 000×) A, Control; B, 0 h high temperature stress; C, 6 h high temperature stress; D, 12 h high temperature stress; E, 24 h high temperature stress; F, 48 h high temperature stress; G, 72 h high temperature stress; H, 96 h high temperature stress. RER, Rough endoplasmic reticulum; M, Mitochondrion; F, Lipid droplet; SER, Smooth endoplasmic reticulum; L,Lipofuscin; PL,Primary lysosome; SL, Secondary lysosome.
图3 高温胁迫下小黄鱼肝脏细胞凋亡观察(400×) A,对照;B,高温处理0 h;C,高温处理6 h;D,高温处理12 h;E,高温处理24 h;F,高温处理48 h;G,高温处理72 h;H, 高温处理96 h。箭头代表凋亡细胞(棕褐色)。
Fig.3 Observation of apoptosis of Larimichthys polyactis liver cells under high temperature stress (400×) A, Control; B, 0 h high temperature stress; C, 6 h high temperature stress; D, 12 h high temperature stress; E, 24 h high temperature stress; F, 48 h high temperature stress; G, 72 h high temperature stress; H, 96 h high temperature stress. Arrows in figure represent apoptotic cells (Brown).
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