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2025年8月5日 星期二
农业生物技术学报  2023, Vol. 31 Issue (12): 2568-2579    DOI: 10.3969/j.issn.1674-7968.2023.12.011
  研究论文与报告 本期目录 | 过刊浏览 | 高级检索 |
水体外源钙补充对罗氏沼虾蜕皮周期的影响
都婷婷1, 丁丽1, 潘玺方1, 唐琼英1, 夏正龙2, 杨国梁1,2, 易少奎1,*
1 湖州师范学院 生命科学学院/浙江省水生生物资源养护与开发技术研究重点实验室,湖州 313000;
2 江苏数丰水产种业有限公司,高邮 225654
Effects of Exogenous Calcium Supplementation in Water on Molting Cycle of Macrobrachium rosenbergii
DU Ting-Ting1, DING Li1, PAN Xi-Fang1, TANG Qiong-Ying1, XIA Zheng-Long2, YANG Guo-Liang1,2, YI Shao-Kui1,*
1 College of Life Sciences, Huzhou University/Zhejiang Provincial Key Laboratory of Aquatic Resources Conservation and Development, Huzhou 313000, China;
2 Jiangsu Shufeng Prawn Breeding Co., Ltd., Gaoyou 225654, China
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摘要 钙离子在甲壳动物蜕皮通路中发挥着重要作用,也是甲壳动物蜕皮后期新表皮矿化过程中的必需元素。为探究水体中外源钙的补充对罗氏沼虾(Macrobrachium rosenbergii)蜕皮周期的影响,本研究开展了水体钙离子浓度25 (对照组)、85、145和205 mg/L的养殖实验,统计了不同水体钙离子浓度下罗氏沼虾蜕皮率,测定了罗氏沼虾蜕皮周期内血淋巴组织钙离子浓度变化,并通过扫描电镜分析了“补钙”对罗氏沼虾钙吸收与外骨骼矿化的影响。同时,获得了罗氏沼虾蜕皮通路中钙调蛋白(calmodulin, MrCaM, GenBank No. OQ411017)和钙网蛋白(calreticulin, MrCRT, GenBank No. OQ411018)基因CDS全长序列,通过qPCR分析了MrCaMMrCRT基因在罗氏沼虾蜕皮各个阶段的表达情况。结果表明,罗氏沼虾在145 mg/L实验组的蜕皮率最高,当钙离子浓度为205 mg/L时蜕皮率显著低于对照组(25 mg/L)(P<0.05)。在不同的蜕皮时期,罗氏沼虾血淋巴钙离子含量随着水体钙浓度的增加呈现先上升后下降的趋势,均在145 mg/L实验组达到最大值,随后下降。扫描电镜结果表明,水体外源钙补充对蜕皮后期的外骨骼矿化具有促进作用。qPCR结果显示,MrCaMMrCRT基因在不同的蜕皮阶段均在145 mg/L实验组表达量最高(P<0.05),205 mg/L实验组显著低于145 mg/L实验组(P<0.05)。不同蜕皮时期MrCaMMrCRT基因与血淋巴钙离子含量的相关性分析结果表明,MrCaM在蜕皮期(E期)与其呈强相关性(r=0.8854),MrCRT基因在不同蜕皮时期都与血淋巴钙离子含量呈极显著相关(P<0.01)。综上所述,水体中的Ca2+浓度在适宜范围内增加,可促进罗氏沼虾的蜕皮和外骨骼矿化。本研究为罗氏沼虾高密度养殖池塘水体的“补钙”提供了科学依据。
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都婷婷
丁丽
潘玺方
唐琼英
夏正龙
杨国梁
易少奎
关键词 罗氏沼虾氯化钙蜕皮钙调蛋白钙网蛋白    
Abstract:Calcium plays an important role in the molting pathway in crustaceans, and it is also an essential element for crustaceans in the biomineralization of the new epidermis in the late ecdystic period. To investigate the effects of exogenous calcium supplementation in water on molting of Macrobrachium rosenbergii, this study conducted the culture experiment with the Ca2+ concentration of 25 (control group), 85, 145 and 205 mg/L in the water. At the end of the culture experiment, the molting rate of the 4 groups was calculated. The content of Ca2+ in the hemolymph was detected, and the effects of exogenous calcium supplementation on calcium absorption and exoskeleton mineralization were investigated using scanning electron microscopy. Meanwhile, the CDS of calmodulin (MrCaM, GenBank No. OQ411017) and calreticulin (MrCRT, GenBank No. OQ411018) in the molting pathway of M. rosenbergii were obtained. The expression levels of MrCaM and MrCRT mRNA in different molting stages of M. rosenbergii were analyzed by qPCR. The results showed that the molting rate of M. rosenbergii was the highest in the 145 mg/L group, and that in 205 mg/L group was significantly lower than that in 25 mg/L group (control group)(P<0.05). In the different molting stages, calcium content in hemolymph of M. rosenbergii firstly increased and then decreased with the increase of water Ca2+ concentration, reaching the peak in the 145 mg/L group. Scanning electron microscope (SEM) results showed that exogenous calcium supplementation could promote the exoskeletal mineralization. The expression levels of MrCaM and MrCRT at different molting stages were the highest in the 145 mg/L group (P<0.05) and significantly lower in 205 mg/L group compared to the 145 mg/L group (P<0.05). The correlation analysis of MrCaM and MrCRT with hemolymph calcium ion content in the different molting stages showed that the expression levels of MrCaM were significantly correlated with hemolymph calcium ion content in molting stage (E stage)(r=0.8854), and the expression level of MrCRT was positively correlated with hemolymph calcium ion content in the different molting stages (P<0.01). Overall, the increase of Ca2+ concentration in water could promote the molting and exoskeleton mineralization of M. rosenbergii. This study provides a basis for clarifying the effects of exogenous calcium supplementation on molting in M. rosenbergii.
Key wordsMacrobrachium rosenbergii    CaCl2    Molt    Calmodulin    Calreticulin
收稿日期: 2023-02-22     
ZTFLH:  S917.4  
基金资助:湖州市公益性应用研究项目(2021GZ36); 国家自然科学基金(32202964); 湖州师范学院研究生科研创新项目(2022KYCX65)
通讯作者: *02844@zjhu.edu.cn   
引用本文:   
都婷婷, 丁丽, 潘玺方, 唐琼英, 夏正龙, 杨国梁, 易少奎. 水体外源钙补充对罗氏沼虾蜕皮周期的影响[J]. 农业生物技术学报, 2023, 31(12): 2568-2579.
DU Ting-Ting, DING Li, PAN Xi-Fang, TANG Qiong-Ying, XIA Zheng-Long, YANG Guo-Liang, YI Shao-Kui. Effects of Exogenous Calcium Supplementation in Water on Molting Cycle of Macrobrachium rosenbergii. 农业生物技术学报, 2023, 31(12): 2568-2579.
链接本文:  
https://journal05.magtech.org.cn/Jwk_ny/CN/10.3969/j.issn.1674-7968.2023.12.011     或     https://journal05.magtech.org.cn/Jwk_ny/CN/Y2023/V31/I12/2568
 
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