Author: Shu-Hsien Lee
J Integr Plant Biol 1952, 1 (2): -.
The carrot variety, Sweetheart, here examined, is grown ill a sand loam soil. The colour, firmness and mold infection of the carrots, during storage, can be improved by a white plastic Saran emulsion as waxing material.
After 80 days storage, waxing either only the cut surface of the crown end, or the whole surface of the carrots, the rate of shrinkage may reduce. No statistical difference between these two methods can be found. Shrinkage in fresh weight seems mainly due to the transpiration through the cut surface of the carrots, and only partly through the remaining surface. If waxing is used to reduce the shrinkage of carrots, as it should de, it is recommended that the cut surface be waxed only.
Irrespective of the tissue to which the cell belongs, the cell walls of the parenchyma would shrink when excess transpiration took place. The parenchyma cell with large vacuoles in both xylem and phloem sarant first while the cambium cells in meristematic state come next. No shrinkage can be found in the lignified cells in the carrots here studied.
As shrinkage proceeds, splitting of tissues might consequently occur. The splitting lines were usually first found in the phloem, then in the xylem, and in the peiricy in succession. Breakage of cambium is only found in the extreme cases.