Planthopper "adaptation" to resistant rice varieties: Changes in amino acid composition over time
Planthopper "adaptation" to resistant rice varieties: Changes in amino acid composition over time
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DOI：
10.1016/j.jinsphys.2011.07.002
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发表时间：
2011-10-01
影响因子：
2.2
通讯作者：
Fitzgerald, Melissa A.
中科院分区：
文献类型：
--
作者：
Chen, Yolanda H.;Bernal, Carmencita C.;Fitzgerald, Melissa A.
褐飞虱褐飞虱对栽培稻品种的反应具有很大的地理和时间变异性。N.褐飞虱已多次“适应”抗性水稻品种;然而，对稻飞虱适应性的生理变化知之甚少。稻飞虱体内的内共生菌，如酵母样内共生菌（YLS），可以发挥作用，因为它们产生稻飞虱必需氨基酸。我们使用了一个完整的析因研究，以确定如何纳塔尔水稻品种，暴露的水稻品种，YLS的存在，以及饲养的代数影响若虫发育，稻飞虱总氮含量，和稻飞虱水解氨基酸谱。若虫发育受到暴露的水稻品种，纳塔尔的水稻品种，饲养的世代数，和YLS的存在之间的四向相互作用的强烈影响。虽然共生在第8代提高了若虫的性能，但在第11代，它似乎是对若虫的消耗，此时非共生若虫实际上表现出比共生若虫更高的性能。这表明，共生关系可能在一代人中起着有益的作用，而在另一代人中起着消耗的作用。共生稻飞虱饲养11代有较高的比例浓度的稀有氨基酸比饲养8代，表明稻飞虱本身似乎提高其获得稀有氨基酸的能力。因此，稻飞虱氨基酸组成的变化表明蛋白质表达或氨基酸代谢随时间的变化。(C)2011爱思唯尔有限公司保留所有权利。
The brown planthopper. Nilaparvata lugens, shows considerable geographic and temporal variability in its response to varieties of cultivated rice. N. lugens has repeatedly "adapted" to resistant rice varieties; however, the physiological changes underlying planthopper adaptation are poorly understood. Endosymbionts within planthoppers, such as yeast-like endosymbionts (YLS) could play a role as they produce essential amino acids for planthoppers. We used a full factorial study to determine how natal rice variety, exposed rice variety, YLS presence, and the number of reared generations affected nymphal development, planthopper total nitrogen content, and planthopper hydrolyzed amino acid profiles. Nymphal development was strongly influenced by a four-way interaction between the exposed rice variety, natal rice variety, number of reared generations, and YLS presence. While symbiosis improved nymphal performance in the 8th generation, it appeared to be a drain on nymphs in the 11th generation, when the aposymbiotic nymphs actually showed higher performance than the symbiotic nymphs. This suggests that the symbiotic relationship may be acting beneficially in one generation while acting as a drain during another generation. Aposymbiotic planthoppers reared for 11 generations had a higher proportional concentration of rare amino acids than those reared for 8 generations, indicating that the planthopper itself appears to improve its ability to acquire rare amino acids. Therefore, the change in amino acid composition of planthoppers suggests an underlying change in protein expression or amino acid metabolism over time. (C) 2011 Elsevier Ltd. All rights reserved.