amounts of auxin rather than absolute ones are being considered the auxin amounts may be more conveniently expressed in arbitrary units. The above-described method has been used for the determination of the distribution of the auxin concentrations in maize, Avena and pea seedlings and also by Yin (unpublished as yet) to study the auxin distribution of Papaya leaves, and has proved to be reliabl...

Light-induced coleoptile stimulation and mesocotyl suppression in etiolated Avena sativa (cv. Lodi) has been quantitated. Etiolated seedlings showed the greatest response to light when they were illuminated 48 to 56 hours after imbibition. Two low-irradiance photoresponses for each tissue have been described. Red light was 10 times more effective than green and 1,000 times more effective than f...

Introduction The effect of incandescent light on the electrical potentials of etiolated seedlings has been studied by only a few investigators. WALTm E(7) maintained that etiolated seedlings gave little, if any, electrical response when illuminated. CLARK (1), however, has demonstrated changes in the longitudinal electrical polarity in intact etiolated Avena seedlings when they are uniformly il...

OBJECTIVE to examine if those adolescents who dislike physical education classes get better results on academic and cognitive performance than their peers. METHODS participants included 4 226 adolescents from the AVENA, AFINOS and UP&DOWN studies. Physical education enjoyment was assessed with a 7-point Likert scale. Cognitive performance in the AVENA study was assessed using the Spanish vers...

1. BONNER, J. and FOSTER, R. J. The growth-time relationships of the auxin-induced growth in Avena coleoptile sections. Jour. Exptl. Bot. 6: 293-302. 1955. 2. COOIL, B. and BONNER, J. Effects of calcium and potassium ions on the auxin-induced growth of Avena coleoptile sections. Planta (In press). 3. HEYN, A. N. J. Der Mechanisms der Zellstreckung. Rec. trav. bot. neerl. 28: 113-244. 1931. 4. H...

Sequence databases could be efficiently exploited for development of DNA markers if it were known which gene regions reveal the most polymorphism when amplified by PCR. We developed PCR primer pairs that target specific regions of previously sequenced genes from Avena and Zea species. Primers were targeted to amplify 40 introns, 24 exons, and 23 promoter regions within 54 maize genes. We survey...