Restoration of Phototropic Responsiveness in Decapitated Maize Coleoptiles
نویسندگان
چکیده
منابع مشابه
Restoration of phototropic responsiveness in decapitated maize coleoptiles.
The literature indicates that the tip of maize (Zea mays L.) coleoptiles has the localized functions of producing auxin for growth and perceiving unilateral light stimuli and translocating auxin laterally for phototropism. There is evidence that the auxinproducing function of the tip is restored in decapitated coleoptiles. We examined whether the functions for phototropism are also restored by ...
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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...
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Avena seedlings were germinated and grown while continuously rotated on the horizontal axis of a clinostat. The coleoptiles of these gravity-compensated plants were phototropically more responsive than those of plants rotated on a vertical axis. When the plants were compensated after unilateral irradiation, phototropic curvature of the shoot progressed for the next 6 hours, with the rate of cur...
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For a number of years, it has been assumed that the Bunsen-Roscoe reciprocity law is valid for phototropic curvature (21, 30). This law states that if light intensity and time of exposure are varied in such a way that the product of the two remains constant, the photochemical effect of the light should also remain constant (13). Thus it was thought that if plants were exposed to unilateral ligh...
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The physical bases for enhancement of growth rates induced by auxin involve changes in cell wall structure. Changes in the chemical composition of the primary walls during maize (Zea mays L. cv WF9 x Bear 38) coleoptile development were examined to provide a framework to study the nature of auxin action. This report documents that the primary walls of maize cells vary markedly depending on deve...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1997
ISSN: 1532-2548,0032-0889
DOI: 10.1104/pp.114.4.1267