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锯缘青蟹卵黄发生期卵巢和肝胰腺脂类的变化

, PP. 66-77

Keywords: 锯缘青蟹,卵黄发生,卵巢,肝胰腺,脂类

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Abstract:

锯缘青蟹2次卵巢发育时的卵黄发生旺期与卵黄发生初期相比,卵巢指数和卵巢脂肪含量(%卵巢干重或湿重)均显著增加,积累了大量的脂类,而这一时期的肝胰腺指数和肝胰腺脂肪含量均无显著变化,说明在卵黄发生时期,肝胰腺吸收的脂肪均及时转运到正在发育的卵巢.卵黄发生期,卵巢或肝胰腺磷脂/总脂的百分含量,均无显著变化,肝胰腺中游离脂肪酸逐步增加,甚至在卵黄发生后期超过甘油三酯的含量.卵黄发生阶段,无论肝胰腺或卵巢,其磷脂长链多不饱和脂肪酸显著高于中性脂,而饱和脂肪酸含量相对较低;肝胰腺脂类脂肪酸组成的最主要变化是中性脂的n3系列的长链多不饱和脂肪酸,尤其是C22:6n3显著降低.卵黄发生初期,肝胰腺磷脂与卵巢中性脂的脂肪酸组成(肝胰腺转运脂肪时,首先要将吸收或储存的脂类转换成磷脂,才能运出)无显著差异,但卵黄发生旺期,肝胰腺磷脂的长链多不饱和脂肪酸显著高于卵巢中性脂的含量.文中讨论了这些变化的原因.

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