López-Malvar Ana, Ordás Bernardo, Souto Carlos, Encina Antonio, Malvar Rosa A, Santiago Rogelio
Universidad de Vigo , Dpto. Biología Vegetal y Ciencias del Suelo, Unidad Asociada BVE1-UVIGO y Misión Biológica de Galicia (CSIC), Campus As Lagoas Marcosende, 36310 Vigo, Spain.
CSIC-Misión Biológica de Galicia , Grupo de Genética y Mejora de Maíz, Apartado 28, C.P., 36080 Pontevedra, Spain.
J Agric Food Chem. 2017 Oct 25;65(42):9180-9185. doi: 10.1021/acs.jafc.7b02911. Epub 2017 Oct 16.
The Mediterranean corn borer (MCB), Sesamia nonagrioides Lef, is an important pest of maize in temperate areas, causing significant stalk lodging and yield losses. The main goals of this study were to determine possible changes in chemical traits (phenols, flavonoids, anthocyanins, sugars, fibers, and lignin) during plant development after the flowering stage and to assess how those traits may differ in diverse genotypes of maize, such as MCB resistant and susceptible. Higher values for some particular traits in more mature tissues seemed to increase their effectiveness against the MCB attack. A decreased amount of borer damage in the field was recorded in the resistant inbred line and in older tissues (7.90 cm vs 31.70 cm as the mean for the stalk tunnel length). In accordance with these results, the resistant inbred line showed a higher degree of hemicellulose cross-linkage (due to ferulic and diferulic acids), higher soluble sugar content, and higher stalk strength. The use of resistant varieties and early sowings is highly recommended as an integrated approach to reduce the yield losses produced by this pest.
地中海玉米螟（Sesamia nonagrioides Lef）是温带地区玉米的一种重要害虫，会导致严重的茎倒伏和产量损失。本研究的主要目的是确定开花期后植物发育过程中化学特性（酚类、黄酮类、花青素、糖类、纤维和木质素）的可能变化，并评估这些特性在不同基因型玉米（如抗地中海玉米螟和感虫玉米）中的差异。在更成熟的组织中，某些特定特性的较高值似乎会增强其抵御地中海玉米螟侵害的能力。在田间，抗性自交系和较老组织中的螟虫危害量有所减少（茎隧道长度平均值分别为7.90厘米和31.70厘米）。根据这些结果，抗性自交系表现出更高程度的半纤维素交联（由于阿魏酸和二阿魏酸）、更高的可溶性糖含量和更高的茎强度。强烈建议采用抗性品种和早播作为综合措施，以减少这种害虫造成的产量损失。
