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The importance of plant genetic resources has received increasing attention in crop improvement and plant variation in breeding procedures. Here, plant variation and the structures of plant populations were examined among 93 flax accessions using SCoT and URP molecular markers. Polymorphic-fragments by URP and SCoT primers were, on average, 9.3 and 10.9, respectively, and the mean of polymorphism information content for primers revealed a good efficiency of both marker techniques (0.34 and 0.35 for URP and SCoT, respectively). The neighbor-joining (NJ)-based clustering, via combined data, classified all investigated accessions into four main groups that were further confirmed by principal coordinate analysis (PCoA). Moreover, molecular diversity (88%) was mostly observed inside the populations. STRUCTURE-analysis confirmed the cluster analysis and all samples were separated into four subpopulations (∆K = 4). The results implied that the sub-populations consisted of diverse accessions, suggesting that this gene pool has the potential for flax breeding programs. Furthermore, our findings indicated that URP and SCoT markers are reliable techniques in assessing plant variation, especially in elucidating the structures of flax populations. However, gene-targeting markers like SCoT are preferable because of their roots in functional genome-based regions. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Natural Fibers is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of GMS Hygiene & Infection Control is the property of German Medical Science Publishing House gGmbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

It has been suggested that cesium is absorbed from the soil through potassium uptake machineries in plants; however, not much is known about perception mechanism and downstream response. Here, we report that the jasmonate pathway is required in plant response to cesium. Jasmonate biosynthesis mutant aos and jasmonate-insensitive mutant coi1-16 show clear resistance to root growth inhibition caused by cesium. However, the potassium and cesium contents in these mutants are comparable to wild-type plants, indicating that jasmonate biosynthesis and signaling are not involved in cesium uptake, but involved in cesium perception. Cesium induces expression of a high-affinity potassium transporter gene HAK5 and reduces potassium content in the plant body, suggesting a competitive nature of potassium and cesium uptake in plants. It has also been found that cesium-induced HAK5 expression is antagonized by exogenous application of methyl-jasmonate. Taken together, it has been indicated that cesium inhibits plant growth via induction of the jasmonate pathway and likely modifies potassium uptake machineries. [ABSTRACT FROM AUTHOR]