Light Growth Response and Auxin Curvatures of Avena

Growth Substance Curvatures of Avena in Light and Dark

An attempt has been made to analyze the base response, one of the light growth responses of Avena coleoptiles, by means of growth substance curvatures. The decrease in growth rate (first part of the base response) after exposure to light does not show if hetero-auxin is substituted for auxin-a (Sections 5, 6, and 10). This decreased growth after exposure very likely is due to an oxidative inact...

Growth, Auxin, and Tropisms in Decapitated Avena Coleoptiles.

With all the work on auxin appearing in the last years it is remarkable that not more investigations are concerned with the actual role of the auxins inside the plant. Barring some early opposition, the original statement "Without auxin no growth" (12) has stood unchallenged for many years. Probably this was so because all test methods were based on the principle of proportionality between auxi...

Ph Ysiolog Y: J. Van Overbeek Light Growth Response and a Uxin Curvatures of a Vena

Red Light and the Geotropic Response of the Avena Coleoptile.

rung auf den. Wuchsstoffgehalt, das Langenwachstum und die geotropische Krimmungsfahigkeit von Helianthus hypokotylen. Planta 60: 109-30. 3. BRAY, G. A. 1960. A simple efficient liquid scintillator for counting aqueous solutions in a liquid scintillation counter. Anal. Biochem. 1: 279-85. 4. DIJKMNAN, M. J. 1934. Wuchsstoff und geotrop)ische Kriimmung bei Lupinus. Rec. tray, bot. n~erland. 31: ...

Physiological mechanism of the auxin-induced increase in light sensitivity of phytochrome-mediated growth responses in Avena coleoptile sections.

The physiology of the auxin-induced 10,000-fold increase in light sensitivity of a phytochrome-mediated growth response (Shinkle and Briggs, 1984 Proc Natl Acad Sci USA 81: 3742-3746) has been characterized in subapical coleoptile sections from dark-grown oat (Avena sativa L. cv Lodi) seedlings. Six micromolar indole-3-acetic acid (IAA) must be present for 1 hour before to 2 hour after irradiat...