1. Transport of the plant growth hormone into the Avena coleoptile as well as the action of the hormone on cell elongation in the coleoptile are shown to depend upon aerobic metabolism. 2. Crystalline auxine, in contrast with impure preparations, affects neither the magnitude nor the respiratory quotient of coleoptile respiration. 3. Increasing age of the coleoptile cell decreases its rate of e...

In this work, the effects of boric acid pretreatment on the seed germination, seedling growth (coleoptile percentage, radicle length, coleoptile length, radicle number and fresh weight) and leaf anatomy of barley under saline conditions were studied. In parallel with concentration increase, salt stress inhibited the germination and seedling growth of barley seeds. Boric acid application allevia...

Rice (Oryza sativa L.) is the only cereal crop that possesses the ability to germinate under flooded or other oxygen-deficient conditions. Rapid elongation of the coleoptile is a perfect response to flooding during germination, with coleoptile length differing among various rice varieties. Despite multiple studies have uncovered valuable information concerning this trait by focusing on the phys...

Initial results on particle yields obtained by the HARP experiment are presented. The measurements correspond to proton–nucleus collisions at beam energies of 12.9 GeV /c and for a thin Al target of 5% interacion legth. The angular range considered is between 10 and 250 mrad. This results are the first step in the upcoming measurement of the forward production cross-section for the same target ...

We provide solution of first order linear fuzzy differential equations by variation of constant formula. The differentiability concept used in this paper is the strongly generalized differentiability since a fuzzy differential equation under this differentiability can have decreasing legth of support function. Under some conditions we provide solution with decreasing support and so the behaviou...

An auxanometer based on capacitance micrometry is described. It does not require light or contact with the plant, and will detect changes in length of the Avena coleoptile of 1 micrometer in 3 to 5 seconds. The field employed, 1 kilohertz at a gradient of 5 volts per centimeter, does not affect the growth rate of the coleoptile. Vertical illumination with blue light at fluences of 1 to 50 ergs....

Growth of the Avena coleoptile, including elongation and curvature responses, is dependent on the auxin which is produced only by the cells in the extreme apex (4, 12, 13). A polar force is required to direct and control the distribution of this auxin. It frequently has been suggested that the inherent electrical field could function as this force and there is evidence that is consistent with t...

Doubled haploid (DH) technology, which is used for rapidly purifying genetic resources, is a key technology in modern maize breeding. The present study evaluated the tissue culture characteristics of maize haploid coleoptile sections, in order to provide a new way of haploid doubling. With 20 combinations of haploid coleoptile sections, obtained by hybridization within Reid, Tangsipingtou, and ...