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      Anatomy of vegetative organs with an emphasis on the secretory structures of two species of Aldama (Asteraceae–Heliantheae)

      , ,

      Botany

      Canadian Science Publishing

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          Most cited references 25

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          Simple method for differential staining of paraffin embedded plant material using toluidine blue o.

           W SAKAI (1973)
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            Plant fructans in stress environments: emerging concepts and future prospects.

            Plants are sessile and sensitive organisms known to possess various regulatory mechanisms for defending themselves under stress environments. Fructans are fructose-based polymers synthesized from sucrose by fructosyltransferases (FTs). They have been increasingly recognized as protective agents against abiotic stresses. Using model membranes, numerous in vitro studies have demonstrated that fructans can stabilize membranes by direct H-bonding to the phosphate and choline groups of membrane lipids, resulting in a reduced water outflow from the dry membranes. Inulin-type fructans are flexible random-coiled structures that can adopt many conformations, allowing them to insert deeply within the membranes. The devitrification temperature (T(g)) can be adjusted by their varying molecular weights. In addition, above T(g) their low crystallization rates ensure prolonged membrane protection. Supporting, in vivo studies with transgenic plants expressing FTs showed fructan accumulation and an associated improvement in freezing and/or chilling tolerance. The water-soluble nature of fructans may allow their rapid adaptation as cryoprotectants in order to give optimal membrane protection. One of the emerging concepts for delivering vacuolar fructans to the extracellular space for protecting the plasma membrane is vesicle-mediated, tonoplast-derived exocytosis. It should, however, be noted that natural stress tolerance is a very complex process that cannot be explained by the action of a single molecule or mechanism.
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              Critical point drying for scanning electron microscopic sthdy of ciliary motion.

               G A HORRIDGE,  S Tamm (1969)
              Scanning electron microscopic study of tile pattern of ciliary coordination and the form of the ciliary beat is now possible. Rapid fixation stops tile ciliary activity instantaneously, and critical point drying avoids distortion of the cilia by surface tension forces. Such stuidies have been made on the ciliate Opalina with this new technique.
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                Author and article information

                Journal
                Botany
                Botany
                Canadian Science Publishing
                1916-2790
                1916-2804
                June 2013
                June 2013
                : 91
                : 6
                : 335-342
                Article
                10.1139/cjb-2012-0271
                © 2013

                http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining

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