Pollen-feeding delays reproductive senescence and maintains toxicity of Heliconius erato
Pollen-feeding delays reproductive senescence and maintains toxicity of Heliconius erato
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花粉喂养延缓了Heliconiuserato的生殖衰老并维持了毒性
DOI：
10.1101/2023.01.13.523799
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
De Castro E
中科院分区：
文献类型：
--
作者：
De Castro E
饮食的变化可能会缓解能量的限制，并允许生物体优化生活史特征。Heliconius蝴蝶与其他花蜜饲养者不同，因为它们独特的消化花粉的能力，这为成年人提供了可靠的氨基酸来源。花粉喂养与延长成年人的寿命和提高生育力有关，但缺乏经验数据证明花粉消费如何影响关键的健身特征，包括化学防御和成年体重，以及在其延长的寿命期间的生育力。在这里，我们调查了花粉喂养对生育力，体重和化学防御，以及后代防御的影响，控制蝴蝶的年龄和性别。最近出现的Heliconius eratopterflies类似大小的14或45天喂养的三种饮食之一：糖溶液，或糖溶液补充氨基酸补充剂或花粉。在实验结束时，进行产卵测定以评价生育力，然后将所有蝴蝶和卵称重并用于定量生氰葡糖苷（CG）。我们发现，有一个特定的年龄和性别的影响，花粉喂养蝴蝶的重量，与糖和氨基酸补充剂的饮食减少老年女性（45天）的重量，但没有年轻的女性（14天）或任何年龄的男性。只喂糖的雌性在成年期显著减少了产卵，而有花粉的雌性则保持了生育能力。饮食有显着的影响，女性的化学防御的维护，但不是男性。奇怪的是，即使能够接触到花粉的雌性更重，毒性更强，产卵更多，但这并没有转化为后代防御能力的改善，因为所有年龄段和饮食处理的蝴蝶卵都有类似的CG含量。我们的研究结果强调了在生活史进化研究中控制年龄特异性和性别特异性影响的重要性，并表明饮食新奇可以放松能量限制。
Dietary shifts may act to ease energetic constraints and allow organisms to optimise life-history traits.Heliconiusbutterflies differ from other nectar-feeders due to their unique ability to digest pollen, which provides a reliable source of amino acids to adults. Pollen-feeding has been associated with prolonged adult lifespan and increased fertility, yet there is a lack of empirical data demonstrating how pollen consumption influences key fitness traits, including chemical defences and adult body weight, as well as fertility over their elongated lifespan. Here, we investigated the effect of pollen-feeding on fertility, weight and chemical defences, as well as offspring defences, controlling for butterfly age and sex. Recently emergedHeliconius eratobutterflies of similar size were fed for 14 or 45 days on one of three diets: sugar solution only, or sugar solution replenished with either amino acid supplement or pollen. At the end of the experiment, oviposition assays were performed to evaluate fertility, and afterwards all butterflies and eggs were weighed and used for quantification of cyanogenic glucosides (CG). We found that there is an age-specific and sex-specific effect of pollen-feeding on butterfly weight, with both the sugar-only and amino-acid supplement diets reducing the weight of old females (45d), but not young females (14d) or males of any age. Females fed only sugar significantly reduced their egg-laying through adulthood, whereas females that had access to pollen maintained their fertility. Diet had a significant effect on the maintenance of the chemical defence of females, but not males. Curiously, even though females that have access to pollen were heavier, more toxic and laid more eggs, this did not translate into improvements in offspring defences, as eggs from butterflies of all ages and diet treatments had similar CG content. Our results emphasise the importance of controlling for age-specific and sex-specific effects in studies of life-history evolution and demonstrate that dietary novelty can relax energetic constraints.
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影响因子：
3.3
作者：
Smith G;Macias-Muñoz A;Briscoe AD
通讯作者：
Briscoe AD
影响因子：
3.8
作者：
de Castro, Erika C. Pinheiro;Demirtas, Rojan;Bak, Soren
通讯作者：
Bak, Soren
两种具有对比交配系统的 Heliconius 蝴蝶的精囊质量和产量
影响因子：
1
作者：
M. Cardoso;Emmanuelle S. Silva
通讯作者：
Emmanuelle S. Silva
蝴蝶属Heliconius（鳞翅目：蛱蝶科）亚科的自适应辐射和收敛
DOI：
--
发表时间：
1976
期刊：
影响因子：
--
作者：
J. Turner
通讯作者：
J. Turner
西番莲蝴蝶体内氰苷的封存和生物合成及其对宿主植物多样化的影响
影响因子：
2.6
作者：
Érika C. Pinheiro de Castro;Mika Zagrobelny;J. P. Zurano;Márcio Zikan Cardoso;R. Feyereisen;S. Bak
通讯作者：
S. Bak