Raxetin, a catechol coumarin, was the most prominent coumarin discovered in the growth media of Naringoside In stock FeDeficient A.thaliana plants grown at high pH and was specifically efficient in mobilization of Fe from an Fe(III)oxide.In contrast, the rest of coumarins were noncatechols and were present in much reduced concentrations, and thus their part in mobilizing Fe is unlikely, though they will nonetheless be effective as allelochemicals.Consequently, the production and secretion of phenolics by roots in response to Fe deficiency would promote an overall decrease in the competition for Fe within the quick vicinity of roots, resulting in enhanced plant Fe nutrition.Final results also recommend that Fe deficiency may be a very good experimental model to understand the ecological dynamics from the biotic interactions inside the plant rhizosphere.AUTHOR CONTRIBUTIONSAAF, PF, and AA conceived and made PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/21543622 the experiments, PST carried out experiments, collected data, and drafted the manuscript, ALV quantified phenolics, carried out Fe mobilization studies and produced figures, AA, FG, JFB, JA, andFrontiers in Plant Science www.frontiersin.orgNovember Volume ArticleSisTerraza et al.Coumarins in FeDeficient Arabidopsis PlantsAAF wrote, reviewed and edited the paper.All authors study and authorized the final manuscript.ACKNOWLEDGMENTWe thank Cristina Ortega and Gema Marco (Aula Dei Experimental StationCSIC) for developing and harvesting plants.FUNDINGWork supported by the Spanish Ministry of Economy and Competitiveness (MINECO) (grant AGLR, cofinanced with FEDER) and the Arag Government (group A).PST and ALV were supported by MINECOFPI contracts.SUPPLEMENTARY MATERIALThe Supplementary Material for this short article might be discovered on the web at journal.frontiersin.orgarticle.fpls.full#supplementarymaterial
The proper interactions among pollen and stigma play a important role in effective pollination which can be the important process in reproduction for angiosperms.The Brassicaceae plants have evolved complex and elaborate mechanisms for productive fertilization to generate vigorous progenies.These mechanisms involve blocking the adherence and growth of interspecies pollen, rejecting “self ” pollen (selfincompatibility, SI) and only enabling the fertilization of compatible pollen with distinct genetic background.The Brassicaceae plants have dry stigmas (with no exudate) whose epidermis is composed of large specialized papillae cells covered by a waxy cuticle and also a superficial proteinaceous pellicle layer (Elleman et al ,).When compatible pollen lands on the stigma, a series of signaling events are triggered.For the duration of this approach, a pollen grainFrontiers in Plant Science www.frontiersin.orgMay Volume ArticleZhang et al.PollenStigma Interactions in Brassica napus L.experiences numerous measures, like adhesion, foot formation, pollen hydration, germination and penetration by means of the stigmatic cell walls.Following these measures, pollen tube grows down via the transmitting tissue of the style, and in the end reaches an ovule where fertilization takes location (reviewed in Chapman and Goring,).Nevertheless, when “self ” pollen lands around the stigma, the SI reaction occurs rapidly, blocking the selfcompatible reaction from pollen adhesion to pollen tube penetration (reviewed in De Nettancourt, FranklinTong,).Various stigma certain genes happen to be shown to participate in compatible and incompatible pollenstigma interactions in Brassicaceae.A stigma distinct Slocus connected (SLR) gene is involved in pollen adhesion, and kn.
