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Quantitative differences detected in the histology of galls induced by the same aphid species in different varieties of the same host
Martinez, J.-J.I.; Moreno-González, V.; Jonas-Levi, A.; Álvarez, R. (2018). Quantitative differences detected in the histology of galls induced by the same aphid species in different varieties of the same host. Plant Biol. 20(3): 516-524. https://dx.doi.org/10.1111/plb.12705
In: Plant Biology. Blackwell Publishing: New York; Stuttgart. ISSN 1435-8603; e-ISSN 1438-8677
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| Auteurs | | Top |
- Martinez, J.-J.I.
- Moreno-González, V.
- Jonas-Levi, A.
- Álvarez, R.
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| Abstract |
Plant galls are abnormal growths caused by an inducer that determines their morphology and anatomy. We qualitatively and quantitatively compared the histological anatomy of five aphid species (Paracletus cimiciformis, Forda marginata, Forda formicaria, Baizongia pistaciae and Geoica wertheimae) that induce galls in Pistacia terebinthus shrubs growing in Israel. We also quantitatively compared these galls to those that the aphids create on the same host in Spain. - Histological study was conducted following methods described previously by the authors.
- Quantitative differences among the galls were found in five of 12 common anatomical traits: gall thickness, stomatal number in the epidermis‐air, size of vascular bundles, distance of phloem ducts from the lumen and number of intraphloematic schizogenous ducts. Other structures were particular to one or some species: number of cracks in the epidermis–lumen, a sclereid layer, trichomes and microcrystal inclusions. Fisher's tests of combined probabilities showed that the galls induced in Israel were statistically different from those in Spain. In particular, the number of intraphloematic schizogenous ducts was higher in the galls induced in P. terebinthus in Israel. Such differences were also found in other traits related to defence of the gall inhabitant.
- In conclusion, while the gall shape and size are determined mainly by the cecidogenic insect, it seems that the host plant also plays an important role in determining the number/size of quantitative traits, in this case mainly protective structures.
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