Wang Ran, Gao Bingli, Zhang Qinghe, Zhang Ziyi, Li Yunyi, Yang Qingyi, Zhang Mi, Li Wenxiang, Luo Chen
Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China.
College of Agriculture and Forestry Technology, Hebei North University, Zhangjiakou, China.
Front Plant Sci. 2022 Sep 2;13:993279. doi: 10.3389/fpls.2022.993279. eCollection 2022.
Acylsugars are secondary metabolites that are produced in the trichomes of some solanaceous species and can help control several herbivorous insect pests. Previously, knockout mutations ( mutants) were shown to significantly reduce the acylsugar content of , and significantly improve the fitness of six generalist insect herbivores. The current study compared the significant mortality and fitness costs in conferred by acylsugar protection of (wild-type plants) compared to strains reared in acylsugar-deficient plants with depleted acylsugar biosynthesis. Acylsugar protection prolonged the developmental duration and decreased viability in the larval stages. Further, the fecundity of females and the hatching rate of eggs significantly decreased under acylsugar protection. For F offspring, acylsugar protection still exerted significant negative effects on larval survival rate and fecundity per female. The net reproductive rate and relative fitness of the strain were strongly affected by acylsugar. Altogether, these results indicate that acylsugar could contribute to plant protection due to toxicity to pests, diffused availability, and low environmental persistence. This could represent a complementary and alternative strategy to control populations of insect pests.
酰基糖是一些茄科植物的腺毛中产生的次生代谢产物，能够帮助控制多种食草害虫。此前研究表明，基因敲除突变（突变体）会显著降低酰基糖含量，并显著提高六种多食性食草昆虫的适合度。本研究比较了酰基糖对野生型植株的保护作用与酰基糖生物合成耗竭的酰基糖缺乏型植株饲养的品系相比，所带来的显著死亡率和适合度代价。酰基糖保护延长了发育时间，并降低了幼虫阶段的活力。此外，在酰基糖保护下，雌虫的繁殖力和卵的孵化率显著下降。对于F代后代，酰基糖保护仍然对幼虫存活率和每只雌虫的繁殖力产生显著负面影响。品系的净繁殖率和相对适合度受到酰基糖的强烈影响。总之，这些结果表明，酰基糖可能因其对害虫的毒性、广泛可得性和低环境持久性而有助于植物保护。这可能代表了一种控制害虫种群的补充和替代策略。
