التفاصيل البيبلوغرافية
| العنوان: |
Effects of Larch Woolly Adelgid Infestation on Morphological, Histological and Allelochemical Traits of European Larch Needles. |
| المؤلفون: |
Dancewicz, Katarzyna1 (AUTHOR) b.gabrys@wnb.uz.zgora.pl, Kordan, Bożena2 (AUTHOR) bozena.kordan@uwm.edu.pl, Damszel, Marta2 (AUTHOR) marta.damszel@uwm.edu.pl, Sergiel, Iwona3 (AUTHOR) i.sergiel@wnb.uz.zgora.pl, Biesaga, Magdalena4 (AUTHOR) mbiesaga@chem.uw.edu.pl, Mroczek, Joanna4 (AUTHOR) joannagasik93@gmail.com, Gabryś, Beata1 (AUTHOR) |
| المصدر: |
Insects (2075-4450). Dec2024, Vol. 15 Issue 12, p938. 23p. |
| مصطلحات موضوعية: |
*EUROPEAN larch, *PLANT defenses, *PHENOLS, *LARCHES, *CATECHIN, *FLAVONOLS, *EPICATECHIN |
| مستخلص: |
Simple Summary: Plant defense mechanisms can be divided into two categories: structural and chemical. Using morphological and biochemical analysis methods, we investigated the effect of the larch wooly adelgid Adelges laricis Vallot infestation on its secondary host, the European larch Larix decidua Mill. The population of the larch wooly adelgid developed from the end of April until the end of June, with the peak number in the first days of May. Anatomical examination of larch needles revealed the altered shape of the needles, the presence of a thicker layer of wax covering the epidermis and an increase in the number of layers of mesophyll as the results of adelgid feeding. The increased amounts of total phenols and individual flavonoids in adelgid-infested needles corresponded with the increase in the larch wooly adelgid numbers. The most abundant flavonoids were catechin and epicatechin, which predominated in larch needles collected at successive phases of adelgid infestation and their content increased along the increase in adelgid infestation. In contrast, the content of kaempferol decreased. These results greatly expand the knowledge on the anatomical and biochemical mechanisms of adelgid-conifer interaction. The study was carried out to assess the effect of the larch wooly adelgid Adelges laricis Vallot (Hemiptera: Adelgidae) infestation on its secondary host, the European larch Larix decidua Mill. Morphology and anatomy of adelgid-infested needles, and content of defense phenolic compounds including individual flavonoids isorhamnetin, kaempferol, quercetin, rutin, catechin, epicatechin, apigenin, ampelopsin and taxifolin, were analyzed. The amount of total phenols in needles from adelgid-infested twigs of L. decidua increased following the development of the A. laricis population, from the end of April until the end of June. The most abundant among flavonoids were the flavanols, mainly catechin and epicatechin, which predominated in the larch needles during the whole period of adelgid infestation. The content of catechin and epicatechin increased following the increase in the adelgid population number. An increase in content occurred also in flavanonols ampelopsin and taxifolin, while the content of the flavonol kaempferol decreased as the population number of A. laricis increased. The analysis of the anatomical structure of needles showed changes in the shape of the needles, the presence of a thicker layer of epicuticular waxes, and a higher number of mesophyll layers as a result of adelgid feeding. [ABSTRACT FROM AUTHOR] |
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