Effects of Different Nutritional Conditions on the Growth and Reproduction of Nilaparvata lugens (Stål)

Abstract

Growth and reproduction are the two most basic life processes of organisms and the distribution of energy in these processes is a core issue of the life history of organisms. Nilaparvata lugens (Stål), the brown planthopper (BPH), is a single-feeding rice pest. In the present study, this species was used as a model for testing the effects of nutritional conditions on various growth and reproduction indicators. First, the third-instar nymphs were fed with three different concentrations (100, 50, and 25%) of artificial diet until the second day of adulthood. The results showed that as the nutrient concentration decreased, the body development and oviposition of BPH were hindered. The total lipid content in the fat bodies was also significantly reduced. RT-PCR analysis showed compared to the 100% concentration group, the expression levels of vitellogenin (Vg) genes in the fifth-instar nymphs, adults, and in different tissues (ovary, fat body, and other tissues) were significantly decreased in the 50 and 25% treatment groups. Western blot analysis showed that Vg protein expression was highest in the 100% group, followed by the 50% group, with no expression in the 25% group. These results indicate that growth and reproduction in the BPH are regulated by, or correlated with, nutrient concentration. This study is of great significance as it reveals the adaptive strategies of the BPH to nutritional deficiencies and it also provides valuable information for the comprehensive control of this pest.

Response of the serine/threonine kinase AKT and phosphoinositide‐dependent kinase PDK in Frankliniella occidentalis (Thysanoptera: Thripidae) to three kinds of foods and their regulation of reproductive function

“…Pooraiiouby et al (2018) found that a high‐carbohydrate food source significantly induced the expression of ILP3 in A. aegypti and increased the storage of nutrients to enhance the fecundity of female mosquitoes. Similarly, under high‐nutrient concentrations, Nilaparvata lugens upregulated the expression of AKT and InR and phosphorylation of AKT and FOXO proteins, thereby affecting the synthesis of 20E and JH and increasing the fecundity of females (Kang et al, 2021).…”

Metabolic Modeling of Hermetia illucens Larvae Resource Allocation for High-Value Fatty Acid Production

“…In recent years, a consensus has been reached regarding the fact that the resource allocation strategies and mechanisms present in different growth and dietary conditions are key aspects in the determination of an organism’s phenotypic specificities [ 1 , 2 ], including metabolism and even biomass composition [ 3 , 4 , 5 ].…”

Spatial, seasonal variation and impacts of anthropogenic factors on insect assemblages (Arthropoda: Insecta) in Northwest Morocco

“…These insects, belonging to diverse orders, are especially vulnerable to the challenges posed by seasonal shifts. Physiological constraints can be imposed due to temperature and water availability fluctuations (Tougeron et al 2020), as well as changes in the availability of nutrients required for individual development and reproduction (Kang et al 2022). However, ecologically and taxonomically, different groups cannot be expected to respond similarly to climate variables and changes in agricultural practices (Cameron et al 2019;Le Provost et al 2021).…”