Results 181 to 190 of about 5,391 (216)
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Some aspects of geotropism in coleoptiles
Planta, 1970Auxin transport was studied in coleoptile sections that were stimulated geotropically. The early time course of auxin-transport asymmetry was measured. An initial phase in which more IAA was delivered into the receptor for the upper half was found after 5 min of horizontal exposure.
Barbara Filner +4 more
openaire +3 more sources
Coleoptile Growth: Variation in Elongation Patterns of Individual Coleoptiles
Annals of Botany, 1971Etiolated coleoptiles of barley differ in rate of growth and the time during germination when most rapid growth occurs. The final heights of coleoptiles fall into these classes: (1) short, ^ 10 mm, (2) medium, ^ 20 mm, and (3) tall, > 30 mm. Tall coleoptiles are produced by coleoptiles that show rapid growth, ^ 800 /z/h, in one of three periods, i.e ...
D. Davidson, A. Liptay
openaire +2 more sources
Expansins and coleoptile elongation in wheat
Protoplasma, 2008Expansins are now generally accepted to be the key regulators of wall extension during plant growth. The aim of this study was to characterize expansins in wheat coleoptiles and determine their roles in regulating cell growth. Endogenous and reconstituted wall extension activities of wheat coleoptiles were measured. The identification of beta-expansins
Qifang Guo +6 more
openaire +3 more sources
Auxin movement in corn coleoptiles
Planta, 1968Movement of radioactive auxins was analysed in corn coleoptile sections. The results support the idea that processes involved in the transport of indoleacetic acid (IAA) are specific for growth-promoting auxins.Inhibition of IAA transport by triiodobenzoic acid is caused by a reversible block of the exit; the auxin held back remains in the transport ...
Rand Flory, Rainer Hertel
openaire +3 more sources
Plastids of the Avena Coleoptile
Nature, 1960PHOTOTROPIC curvature of the Avena coleoptile may, for reasons which have been summarized elsewhere1, be mediated through the plastids. Geotropic curvature may have a similar basis, for it has long been thought2,3 that the geotropic responses of both shoots and roots are mediated by special starch grains or ‘statoliths’, and these in fact are plastids ...
Helen P. Sorokin, Kenneth V. Thimann
openaire +2 more sources
THE INFLUENCE OF AUXIN ON RESPIRATION OF THE AVENA COLEOPTILE
American Journal of Botany, 1946VARIOUS GROSS effects of auxins on plant growth are easily demonstrated and are well known. The exact mechanism, however, by which these changes are initiated still is obscure. A close connection between growth and respiration is almost axiomatic, and Bonner in 1936 demonstrated that such a close relationship existed in the Avena coleoptile.
G. S. Avery, Patricia Smith, J. Berger
openaire +3 more sources
HISTOLOGICAL STUDIES ON THE COLEOPTILE. I. TISSUE AND CELL TYPES IN THE COLEOPTILE TIP
American Journal of Botany, 1965The uppermost 1‐4 mm of 25‐mm coleoptiles of oats and wheat have been studied at the optical microscope level, using newer histological methods and sections 1‐4 μ thick. The outer epidermal wall, which shows very fine wrinkling, is continuous with the thinner wall of the inner epidermis through the pore.
Kenneth V. Thimann, Terence P. O'Brien
openaire +2 more sources
Glucanase activity in coleoptiles of Avena
Archives of Biochemistry and Biophysics, 1969Abstract The presence of five different β-glucanases has been investigated in coleoptiles of Avena with the use of specific substrates. A high activity of β-1,3-glucanase is found associated with the coleoptiles. With regard to β-1,4-glucanase activity a strong activity of exo -cellulase which splits glucose (or cellobiose) from the end of the ...
openaire +3 more sources
Polyamines and Anaerobic Elongation of Rice Coleoptile
Plant and Cell Physiology, 1989Description d'une difference dans le metabolisme des polyamines entre des coleoptiles de riz poussant en conditions aerobie et anaerobie. En condition anaerobie, on observe une accumulation de putrescine libre. L'utilisation de putrescine exogene et d'inhibiteurs de la synthese des polyamines a permis de demontrer la necessite de ces substances pour l ...
Reggiani R, Hochkoeppler A, Bertani A
openaire +3 more sources