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Protein:Carbohydrate Ratios in the Diet of Gypsy Moth Lymantria dispar Affect its Ability to Tolerate Tannins.
Journal of Chemical Ecology ( IF 2.3 ) Pub Date : 2020-02-14 , DOI: 10.1007/s10886-020-01161-x
Cynthia Perkovich 1 , David Ward 1
Affiliation  

Generalist insect herbivores may regulate nutrient balance in their diets, including the incorporation of carbohydrates as well as proteins. However, secondary metabolites, including tannins, are likely to interact with dietary protein:carbohydrate ratios in insect herbivores. We investigated the effects of protein:carbohydrate ratios, tannin, and the interaction between macronutrient ratios and tannin on the performance of the gypsy moth Lymantria dispar. We designed a 6 X 3 factorial experiment, with six protein:carbohydrate ratios and three tannin concentrations. We monitored the development time and size of gypsy moths on the different diets. We conducted 4th stadium feeding trials to measure consumption, digestibility, and overall efficiency of ingestion/digestion. Gypsy moths fed a diet containing a 1:1 protein:carbohydrate ratio without tannin grew larger and developed faster than those fed a 1:2 protein:carbohydrate ratio diet. Increasing protein in the diet above the 1:1 protein:carbohydrate ratio (i.e. 2:1 or 7:1) did not have a significant effect on gypsy moth growth or development. Approximate digestibility was greatest in treatments with a low protein:carbohydrate ratio (1:2). Gypsy moths grew faster and larger on no-tannin diets than those with tannin in the diet. However, the specific concentration of tannin did not affect growth. The resulting interaction between protein:carbohydrate ratio and tannin showed that there may be a trade-off between development time and efficiency of food assimilation. We also found that feeding gypsy moth larvae an optimal protein:carbohydrate ratios may be more important for tolerating tannin than the amount of protein ingested alone.

中文翻译:

吉普赛蛾赖氨酸饮食中的蛋白质:碳水化合物比率影响其耐受单宁的能力。

多才多艺的食草动物可能会调节其饮食中的营养平衡,包括碳水化合物和蛋白质的掺入。但是,次生代谢物(包括单宁酸)可能与昆虫食草动物中的饮食蛋白质:碳水化合物比例发生相互作用。我们调查了蛋白质:碳水化合物比率,单宁以及常量营养素比率与单宁之间的相互作用对吉普赛蛾Lymantria dispar性能的影响。。我们设计了一个6 X 3阶乘实验,具有6种蛋白质:碳水化合物比和3种单宁浓度。我们监测了不同饮食中吉卜赛蛾的发育时间和大小。我们进行了第4次体育场饲养试验,以测量消耗量,消化率和总体消化/消化效率。饲喂含蛋白质与碳水化合物比为1:1的饮食而不含单宁的吉普赛蛾比饲喂含蛋白质与碳水化合物比为1:2的饮食的蛾类长得更大且发育更快。日粮中蛋白质的增加比例超过蛋白质与碳水化合物的比例1:1(即2:1或7:1),对吉卜赛蛾的生长没有显着影响。在蛋白质/碳水化合物比率低(1:2)的处理中,近似消化率最大。不含单宁饮食的吉普赛蛾的生长速度要快于单宁饮食。然而,单宁的具体浓度不影响生长。蛋白质:碳水化合物比例与单宁之间的相互作用表明,开发时间与食物同化效率之间可能需要权衡。我们还发现,饲喂吉卜赛蛾幼虫最佳的蛋白质:碳水化合物比对单宁的耐受性可能比单独摄入蛋白质的量更重要。
更新日期:2020-02-14
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