Cell extension in the growing zone of plant roots typically takes place with a maximum local growth rate of 50% length increase per hour. The biochemical mechanism of this dramatic growth process is still poorly understood. Here we test the hypothesis that the wall-loosening reaction controlling root elongation is effected by the production of reactive oxygen intermediates, initiated by a NAD(P...

Growth of temperate lettuce (Lactuca sativa) plants aeroponically in tropical greenhouses under ambient root-zone temperatures (A-RZTs) exposes roots to temperatures of up to 40 degrees C during the middle of the day, and severely limits root and shoot growth. The role of ethylene in inhibiting growth was investigated with just-germinated (24-h-old) seedlings in vitro, and 10-d-old plants grown...

We studied the impact of drought on growth regulation in leaves of 13 maize varieties with different drought sensitivity and geographic origins (Western Europe, Egypt, South Africa) and the inbred line B73. Combining kinematic analysis of the maize leaf growth zone with biochemical measurements at a high spatial resolution allowed us to examine the correlation between the regulation of the cell...

On a loom, the warp yarns experience exceptionally high mechanical stresses and strains, as well significant abrasion from friction. As result, yarn breakages cause loom stoppages and, hence, production quality interruptions. To mitigate this problem, should be treated with thin, strong film of an appropriate adhesive. The aim study is therefore, to investigate effect sizing machine parameters ...

The feasibility of friction stir welding to joining AC4CH semisolid cast aluminum alloy with 6061 plates was investigated, including the influence condition on mechanical properties joints. Excessive heat input conditions high tool rotational speed and low result in formation large burrs. Although hardness zone is scarcely affected by condition, as 1mm/s makes heat-affected zones both sides sof...

the sangbast-shandiz fault zone, with a length of about 57 km, a width of moderately 2 km, and a nw-se direction, is located about 15 km in the west of mashhad city. that is one of the major faults in the binalud mountains. geomorphic evidences illustrate that the sangbast-shandiz fault zone has dextral strike- slip offsets with thrust activity. in this article, we investigated geomorphic featu...