Effects of High Humidity on Translocation of Foliar-Applied Labeled Compounds in Plants Part: I

Effects of High Humidity on Translocation of Foliar-applied Labeled Compounds in Plants. II. Translocation from Starved Leaves

“…ones will be noticed; second, the nontreated portions of the treated cotyledons are similarly labeled. This is evidence for uptake and movement in the xylem, a phenomenon well demonstrated in the previous paper in this series (3). The characteristic wedge-shaped patterns of normal apoplastic movement are present.…”

“…The procedure used in these studies is the same as that employed in the previous paper in this series (3). In addition to C14-labeled 2,4-D and urea, a third freely mobile compound, C14-labeled 3-amino-1,2,4-triazole was included to broaden the comparative basis of the work.…”

“…Similar rings on the epicotyl did not prevent upward nmovement which movement we interpret to be via the xylem. Secondary phloem movement above the epicotylar ring resulted in high tracer concentrations in the young expanding leaves aind terminal buds (3).…”

“…WVhen the plants were placecl in polyethylene bags to produce high humidity atmlosphere, trainslocation was greatly increased (3).…”

Effects of Nonionic Surfactants on Root Growth and Cation Uptake

“…or even insecticides, but in other circumstances invol ving complex growth phenomena such as differentiation, induction, or auxin-mediated events a strcng case can be made for greater caution. The exact concentration of the surfactant employed is often unspecified (3,5,13 In general the polyethylene sorbitan fatty acid esters were less inhibitory to roots than those witl ether or ether-alcohol structures.…”