Sugars reducing, concentration related

Lactisole [13794-15-5] the sodium salt of racemic 2(4-methoxyphenoxy)propionic acid, is a sweet-taste inhibitor marketed by Domino Sugar. It was affirmed as a GRAS flavor (FEMA no. 3773). At a concentration of 100 to 150 ppm, lactisole strongly reduces or eliminates the sweet taste of a 10% sugar solution. This inhibition appears to be receptor-related because lactisole also inhibits the sweet taste of aspartame. The 5 -( —)-enantiomer [4276-74-8] (38), isolated from roasted coffee beans, is the active isomer the i -(+)-enantiomer is inert (127). 

Vascular plants including trees. Effects are related to HM toxicity, such as the reduced growth of roots and shoots, elevated concentrations of starch and total sugar and decreased nutrient contents in foliar tissues and depressed biochemical activity ... 

Enzyme activity towards carboxylmethyl cellulose (CMC) was measured by combining 50 fiL enzyme with 0.5 mL of 0.5% CMC in pH 4.8 sodium citrate buffer and incubating at 50°C for 10 min. After this, the reaction was stopped by addition of 1.5 mL dinitrosalicylic acid reagent and the resultant color, which was measured at A54onm, related to the reducing sugar concentration. 

A higher concentration of pectins and possibly pentosans occurred in leaves of boron-deficient plants (101). This was interpreted to be a factor in the reduced wilting of boron-deficient plants under moisture stress. Leaves of boron-deficient plants also had a higher percentage of nonfunctional stomates and a higher sugar and colloid content. In addition, Starck (102) observed that without boron in the nutrient medium, plants absorbed less water and nutrient, possibly because of an indirect effect related to boron deficiency on root growth. 

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