Carotene in the leaves of the carrot

Abstract

Leaves of carrot plants of cultivated varieties contained an average of I 19 mg. of total carotene per kg. fresh weight, or 546 mg. per kg. dry weight. The concentration of total carotene bused on uvevuges of many batches was approximately constant through the season so long its the leaves remained healthy in appearance, and except for small seedlings, was independent of the age of the plant. The average concentration was the same during three successive years.There was, however, a variation between individual batches from different varieties, seasons and growing conditions. A measure of this overall variation is given by the standard deviation, 19 mg. per kg. fresh weight. Part of this variation was due t o experimental error of the analytical method, and part t o sampling. Beyond these there was a residual variation between different batches which has not been explained.The concentration of leaf total carotene was independent of variety among cultivated types of carrot. There was no correlation between carotene concentrations in leaf and in root althhough the latter varied several hundredfold in different varieties, which included deep red, orange and white types.In these respects leaves contrasted with roots.

Effect of diet on growth, survival and fatty acid profile of marine amphipods: implications for utilisation as a feed ingredient for sustainable aquaculture

“…In the current study, however, all diets were readily consumed, and the highest rates of survival and growth were observed for E. marinus with dried Fucus and for G. locusta with dried carrot leaves. The high survival of G. locusta when fed carrot leaves might be partially explained by high levels of carotenoids in carrot leaves, which can be higher than 700 mg per 100 g of dry weight (Booth 1957, Perrin et al 2016. Specimens of this treatment group featured more intense pigmentation and had a dark orange colouration after freezedrying ( Fig.…”

Pigments in Vegetables

“…a-Carotene constituted WOlo of the total (MacKinney, 1935). Later, a higher value of 13% was determined, namely in the leaves of carrots having appreciable total carotenes in the roots; it was already detectable in their cotyledons (Booth, 1956(Booth, , 1957.…”

“…Total carotene content was 60 to 170 ILg (g fresh wt) -I, the concentration remaining nearly constant through the season. The concentration of leaf total carotenes was independent of the variety (Booth, 1957). a-Carotene constituted WOlo of the total (MacKinney, 1935).…”