The Influence of the Host Plant On Lipid Reserves of Globodera Rostochiensis

Nematologica Pub Date : 1998-01-01 DOI:10.1163/005325998X00045

R. A. Holz, D. Wright, R. Perry

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引用次数: 5

Abstract

Up to 16 fatty acids were detected in total lipids from roots and leaves of two potato cultivars, Desiree and Maris Piper, and one tomato cultivar, Pixie. The fatty acid profiles from roots were similar for all three cultivars and were dominated by C18 : 2 (30-40%) and C 16 : 0 (about 22%). The fatty acid profiles from leaves were similar for all three cultivars and were dominated by C18 : 3 (about 52%). Both root and leaf lipids contained mainly C18 fatty acids. The lipid content found in dry cysts of Globodera rostochiensis rcared on different cultivars was 11.0%, 12.8% and 9.6% for potato cvs Desiree and Foremost and tomato cv. Pixie, respectively. The total lipid comprised 74-82% neutral lipid, 14-19% non-acidic phospholipid and 4-7% free fatty acid in the three samples. Hatched juveniles (J2) from cysts cultured on cvs Desiree and Foremost contained 26.1% and 24.3% lipid, respectively. The total lipid comprised 77% neutral lipid, 17-18% non-acidic phospholipid and 6-7% free fatty acid in the two samples. The fatty acid profiles of the main lipid classes of cysts of G. rostochiensis cultured on the three different cultivars were similar. The fatty acid composition of the main lipid classes of freshly hatched J2 from cysts of G. rostochiensis cultured on the two potato cultivars differed only in their free fatty acid fractions. A comparison of the fatty acid profiles of the total lipid of potato roots, cv. Desiree, and the total lipid of cysts of G. rostochiensis showed major differences. Root fatty acids and nematode fatty acids were 38% and 22% saturated, 10% and 44% monounsaturated and 52% and 35% polyunsaturated, respectively. The fatty acid profile of root lipids was dominated by C16: 0, C18: 2 and C18 : 3 but the nematode lipids consisted of mainly C18: 1, C20: 1 and C20: 4. The differences in the fatty acids of host and nematodes indicate that G. rostochiensis is capable of fatty acid chain elongation and/or desaturation.

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寄主植物对罗斯托氏Globodera Rostochiensis脂质储备的影响

从两个马铃薯品种Desiree和Maris Piper以及一个番茄品种Pixie的根和叶的总脂质中检测到多达16种脂肪酸。3个品种根部脂肪酸分布相似，均以c18:2(30-40%)和c16:0(约22%)为主。3个品种叶片脂肪酸谱相似，均以C18: 3为主(约52%)。根脂和叶脂主要含有C18脂肪酸。不同品种栽培的罗斯托氏Globodera rostochiensis干囊中脂质含量分别为11.0%、12.8%和9.6%。分别小精灵。三种样品的总脂质为中性脂74-82%，非酸性磷脂14-19%，游离脂肪酸4-7%。在Desiree和最重要的卵囊上孵化的幼鱼(J2)脂肪含量分别为26.1%和24.3%。两种样品的总脂质由77%的中性脂、17-18%的非酸性磷脂和6-7%的游离脂肪酸组成。在3个不同栽培品种上培养的黄芪囊主要脂类的脂肪酸谱相似。在两种马铃薯品种上培养的新鲜孵化的罗斯托奇氏包囊J2主要脂类的脂肪酸组成仅在游离脂肪酸部分上存在差异。马铃薯根总脂质脂肪酸谱的比较。黄芪囊的总脂质和脂肪含量差异较大。根脂肪酸和线虫脂肪酸分别为饱和脂肪酸38%和22%，单不饱和脂肪酸10%和44%，多不饱和脂肪酸52%和35%。线虫根脂主要由C18: 1、C20: 1和C20: 4脂肪酸组成，而根脂主要由C16: 0、C18: 2和C18: 3脂肪酸组成。寄主和线虫脂肪酸的差异表明，罗斯托克氏线虫具有脂肪酸链延伸和/或去饱和的能力。

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Nematologica

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