Divergence of Drosophila species: longevity and reproduction under different nutrient balances
Divergence of Drosophila species: longevity and reproduction under different nutrient balances
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果蝇物种的分化：不同营养平衡下的寿命和繁殖
DOI：
10.1111/gtc.12798
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发表时间：
2020
期刊：
影响因子：
2.1
通讯作者：
Tadashi Uemura
中科院分区：
文献类型：
--
作者：
Masayoshi Watada;Yusaku Hayashi;Kaori Watanabe;Shoko Mizutani;Ayumi Mure;Yukako Hattori;Tadashi Uemura
营养如何影响生长、繁殖和寿命是复杂的，因为这些生命事件之间的关系很难理清。作为整理这些过程的第一步，我们对具有不同食性的果蝇的相关物种进行了比较分析。特别地，我们研究了两名通才和三名专家在不同蛋白质与碳水化合物比例饮食中的寿命和产卵情况。与通才相反；黑腹怪，成年男性2人，专科医生；sechelliaandD。线虫在富含蛋白质的饮食中寿命更长。这些结果和我们之前的研究共同表明，每种特殊物种的幼虫所适应的饮食确保了同一物种成年雄性的寿命更长。我们还发现，无论饮食如何，上述两种专家的寿命都存在物种特异性的性别二态性，这与d。腹。在黑腹蛇中，雄性比雌性寿命长；sechelliaandD。与其他物种相比，秀丽隐杆线虫的寿命比雄性要长，而那些专业的雌性的产蛋率也非常低。我们从机制的角度讨论了我们的发现，包括卵子生产对寿命的可能贡献。
How nutrition impacts growth, reproduction and longevity is complex because relationships between these life events are difficult to disentangle. As a first step in sorting out these processes, we carried out a comparative analysis of related species ofDrosophilawith distinct feeding habits. In particular, we examined life spans and egg laying of two generalists and three specialists on diets with distinct protein‐to‐carbohydrate ratios. In contrast to the generalistD. melanogaster, adult males of two specialists,D. sechelliaandD. elegans, lived longer on a protein‐rich diet. These results and our previous studies collectively show that the diet to which larvae of each specialist species have adapted ensures a longer life span of adult males of that same species. We also found a species‐specific sexual dimorphism of life span in the above two specialists regardless of the diets, which was in sharp contrast toD. melanogaster. InD. melanogaster, males lived longer than females, whereas females ofD. sechelliaandD. eleganswere longer‐lived than males, and those specialist females were exceedingly low in egg production, relative to the other species. We discuss our findings from perspectives of mechanisms, including a possible contribution of egg production to life span.