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Does acclimation reduce the negative effects of acorn tannins in the wood mouse Apodemus speciosus?

100%

Shimada T., Saitoh T., Matsui T.

Acta Theriologica

2004

tom 49

nr 2

Acclimation as a mechanism of mitigating the damaging effects of acorn tannins was examined in the Japanese wood mouse Apodemus speciosus Temminck, 1844. Mice were fed the two types of diet: a control diet laboratory chow for mice), and acorns of Quercus serrata (QS), which differ in tannin contents (control = 0%, QS = 2.7% tannic acid equivalent). Body weight changes and digestive abilities were compared between the first stage (Days 1 to 5; Day 0 was defined as the first day of acorn feeding) and the second stage (Days 6 to 10). The amount of salivary proline-rich proteins (PRPs), which are thought to be defensive products to tannins, was measured before and after the experiment. The responses of the wood mice to QS acorns differed between stages: decreases in body weight during the second stage were less than half those that occurred during the first stage; digestive abilities tended to improve; and the relative amount of PRPs after the experiment increased by a factor of five compared with the value recorded before the experiment in the QS-feeding mice. These results suggest that the negative effects of ingesting acorn tannins may be reduced by acclimation, which may result primarily from the induction of PRP production.

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The number and abundance of ichneumonidae (Hymenoptera, Apocrita) subfamilies occurring in apple orchards and on their edges

75%

Piekarska-Boniecka H., Zyprych-Walczak J., Rzanska-Wieczorek M., Dinh D. T., Siatkowski I.

Acta Scientiarum Polonorum. Hortorum Cultus

2018

tom 17

nr 2

Plant communities which form orchard edges are a vital element of ecological infrastructure enriching these agrocenoses. The research was conducted in an orchard environment made up of apple orchards and their edges in the form of agricultural cultivations, tree clumps and a road lined with trees and shrubberies. The study aim was to determine the impact of the orchard edge plant diversity onto the number and abundance of Ichneumonidae subfamilies in the orchards. The study showed that orchard environments made up of an apple orchard and edge plants of various species create better living conditions for Ichneumonidae parasitoids than the environment of an orchard and neighbouring agricultural cultivations. The diversity of orchard edge plants positively influences the abundance of the Ichneumonidae subfamilies rather than the number of subfamilies in the orchard. In the orchard habitat the following dominant subfamilies were found: Campopleginae, Cryptinae, Orthocentrinae and Pimplinae. These entomophages may control the abundance of pests infesting orchards.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Hortorum Cultus

1 Acta Theriologica

1 Dinh D. T.

1 Matsui T.

1 Piekarska-Boniecka H.

1 Rzanska-Wieczorek M.

1 Saitoh T.

1 Shimada T.

1 Siatkowski I.

1 Zyprych-Walczak J.

1 2018

1 2004

Wyniki wyszukiwania

Does acclimation reduce the negative effects of acorn tannins in the wood mouse Apodemus speciosus?

The number and abundance of ichneumonidae (Hymenoptera, Apocrita) subfamilies occurring in apple orchards and on their edges