Effects of genetic modifications to flax Linum usitatissimum on arbuscular mycorrhiza and plant performanceReport as inadecuate




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Mycorrhiza

, Volume 22, Issue 7, pp 493–499

First Online: 05 January 2012Received: 22 August 2011Accepted: 14 December 2011

Abstract

Although arbuscular mycorrhizal fungi AMF are known for their positive effect on flax growth, the impact of genetic manipulation in this crop on arbuscular mycorrhiza and plant performance was assessed for the first time. Five types of transgenic flax that were generated to improve fiber quality and resistance to pathogens, through increased levels of either phenylpropanoids W92.40, glycosyltransferase GT4, GT5, or PR2 beta-1,3-glucanase B14 or produce polyhydroxybutyrate M50, were used. Introduced genetic modifications did not change the degree of mycorrhizal colonization as compared to parent cultivars Linola and Nike. Arbuscules were well developed in each tested transgenic type except M50. In two lines W92.40 and B14, a higher abundance of arbuscules was observed when compared to control, untransformed flax plants. However, in some cases W92.40, GT4, GT5, and B14 Md, the mycorrhizal dependency for biomass production of transgenic plants was slightly lower when compared to the original cultivars. No significant influence of mycorrhiza on the photosynthetic activity of transformed lines was found, but in most cases P concentration in mycorrhizal plants remained higher than in nonmycorrhizal ones. The transformed flax lines meet the demands for better quality of fiber and higher resistance to pathogens, without significantly influencing the interaction with AMF.

KeywordsMycorrhiza Linum usitatissimum Transgenic flax Plant performance  Download fulltext PDF



Author: Magdalena Wróbel-Kwiatkowska - Katarzyna Turnau - Katarzyna Góralska - Teresa Anielska - Jan Szopa

Source: https://link.springer.com/







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