. Hydration and growth. Growth (Plants); Plants. Fig. 42.—Arrangement of auxograph to take variations in length of pod of Phaseolua. The mature tip of pod is fastened to cork buffer on end of lever of instrument. close of the day the rate accelerates again and growth is rapid until checked by the falling temperature. (Fig, 43.) These records were all made of plants not subjected to the direct action of the sim. One was placed in such position that the svmlight fell directly upon the pod for about 15 minutes before 6 p. m., with the. Fig. 43.—Tracing of auxographic record of growth in length of
. Hydration and growth. Growth (Plants); Plants. Fig. 42.—Arrangement of auxograph to take variations in length of pod of Phaseolua. The mature tip of pod is fastened to cork buffer on end of lever of instrument. close of the day the rate accelerates again and growth is rapid until checked by the falling temperature. (Fig, 43.) These records were all made of plants not subjected to the direct action of the sim. One was placed in such position that the svmlight fell directly upon the pod for about 15 minutes before 6 p. m., with the. Fig. 43.—Tracing of auxographic record of growth in length of bean pod, X 45. The features of active elongation are similar to those described for variations in thickness in fig. 44. Retardation of growth is seen at temperatures above 30° C. Downward course of pen denotes increase. result that a sudden enlargement followed, which was quickly retracted and quiescence or slow shrinkage followed. Such sudden variations have been seen in other types of organs, such as the joints of Opuntia, and seem to be enlargements due to expansion of gases in the organ, the cavity of the pods in this case being of such size that a marked response might be expected (fig. 44). The features of variation of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original MacDougal, Daniel Trembly, 1865-1958. Washington, Carnegie Institution of Washington
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectplants, bookyear1920
