منابع مشابه
Improved Avena Coleoptile Elongation Test for Auxin'
Sum rv01,1f. A mo(lifie(l )rocedlure is presente(d for the bioassay of aulxin lusilng -Iv'eno coleoptile segments. The modifications introduicedl restult in a substantial improvement of the commonly uised( coleoptile elongatioil tests. The proposed test retains the simplicity of physical reqillremeints and of manipulatioIn characteristic of all elongatioln tests. The maiin featuire of the propo...
متن کاملAuxin Transport and Geoelectric Potential in Corn Coleoptile Sections.
Asyximmetry of ildoleacetic aci(l distribution has lbeen associated witlh the (levelollment of plant bioelectric l)otentials. In the absenlce of auxinl. no detectable l)otential (levelops, but wvhen atuxin is suppliedl auxin asymmlletries cause(l by(lifferelnces in translport give rise to bioelectric potelntials (4. 6). Recenltlv (2) it \-as demonistrate(d that uinder anoxia. vhere no potential...
متن کاملAuxin-induced Changes in Avena Coleoptile Cell Wall Composition.
Sugar and uronic acid residues were derived from wall polysaccharides of oat (Avena sativa, var. Victory) coleoptiles by means of 2 N trifluoroacetic acid, 72% sulfuric acid, or enzymic hydrolysis. The products of hydrolysis were reduced and acetylated to form alditol acetates which were analyzed using gas chromatography. Time-course studies of auxin-promoted changes in various wall fractions i...
متن کاملDo mycobacteria produce endospores?
The genus Mycobacterium, which is a member of the high G+C group of Gram-positive bacteria, includes important pathogens, such as M. tuberculosis and M. leprae. A recent publication in PNAS reported that M. marinum and M. bovis bacillus Calmette-Guérin produce a type of spore known as an endospore, which had been observed only in the low G+C group of Gram-positive bacteria. Evidence was present...
متن کاملThe Nature of the Auxin in Tomato Stem Tips.
It is of considerable importance to know the chemical identity of the naturally occurring growth hormone or auxin. However, the natural auxin occurs in such small amounts in the plant that chemical isolation is difficult if not impossible. To overcome the difficulty of the low concentration plant materials have been sought which conitained an exceptionally high auxin concentration. As such, cor...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 1973
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1973.tb04393.x