Search Results
Abstract
Mechanical injuries of tubers of potato (Solanum tuberosum L.) such as brushing, cutting, dropping, puncturing, and hammering greatly stimulated glycoalkaloid synthesis in both peel and flesh of tubers. The extent of glycoalkaloid formation depended on cultivar, type of mechanical injury, storage temperature, and duration of storage. High temperature storage stimulated more glycoalkaloid formation than that of low temperature. Most of the injury-stimulated glycoalkaloid formation occurred within 15 days after treatments. Mechanical injury caused by cutting of tubers resulted in the highest contents of glycoalkaloids both in flesh and peel.
Abstract
Subatmospheric pressure (hypobaric) treatments increased the storage life of apricots by 15 to 37 days, peaches by 7 to 27 days, sweet cherries by 16 to 33 days, pears by 1.5 to 4.5 months, and apples by 2.5 to 3.5 months. In general, chlorophyll and starch degradation, losses of sugars and titratable acidity, and formation of carotenoids were delayed by the subatmospheric pressure treatments.
Abstract
Low O2 atmospheres inhibited ripening and thus increased the storage life at 12.78°C (55°F) of tomato fruits. At 10% O2 and 90% N2, the storage life was 62 days; at 3% O2 and 97% N2, 76 days. The maximum life of tomato fruits in this study was 87 days (1% O2 and 99% N2). Low O2 atmospheres inhibited degradation of chlorophyll and starch, and syntheses of lycopene, β-carotene, and soluble sugars of tomato fruits.
Abstract
Oil dipping of potato tubers at 22°C inhibited solanine and chlorophyll formation by 92-97% and 93-100%, respectively. Oil dipping at 60°, 100°, and 160°C completely inhibited chlorophyll and solanine formation. The tuber sprouting of cvs. Russet Burbank, White Rose, and Red Pontiac was com pletely inhibited by oil dipping at all temperatures. There were no significant differences in the respiration of the peel and flesh of treated and control tubers.
Abstract
Soil fumigations with Telone (1,3-dichloropropene and other chlorinated hydrocarbons) at the rates of 10, 20, and 30 gal/A and Nemagon (1,2-dibromo-3-chloropropane) at the rates of 1, 2, and 3 gal/A, one week before planting carrot and sweet corn seeds brought about significant increases in the content of total carotenes, β-carotene, and total sugars in carrots and the total carotenoids in sweet corn seeds and decreases in respiratory rates of the carrot roots.
Abstract
A treatment of potato tubers (Solarium tuberosum L.) at 22°C with corn oil, peanut oil, olive oil, vegetable oil, or mineral oil significantly and effectively inhibited chlorophyll and solanine formation. A concn of 1/8 corn oil and 7/8 acetone was the minimum effective diluted oil treatment.
Abstract
Tubers of potato (Solanum tuberosum L.) with the nonparasitic disorders of hollow heart and blackheart contained significantly more glycoalkaloids in the cortical region than normal tubers in 3 cultivars. The glycoalkaloid content of tuber tissue was related to the severity of the disorders.
Abstract
The results of 2 years’ field trials indicate that application to the soil of s-triazines, including simazine, propazine, igran, and ametryne, at low concentrations (0.125 and 0.5 lb./A) increased the protein content of pea (Pisum sativum L., cv. Perfected Freezer) seeds. Relatively higher concentrations (1 and 4 lb./A) of simazine, atrazine, prometone, igran, or ametryne were needed to increase the protein content of sweet corn (Zea mays L., cv. Iochief) seeds. Both quantitative and qualitative changes were noted in the pattern of amino acids in the seeds from the treated plants.
Abstract
Telone (10, 20, 30 gal/acre) and Nemagon (1, 2, 3 gal/acre) were applied to the soil one week before planting of carrots. Compared to the untreated controls, the roots of the treated plants had a significantly higher content of total carotene, β-carotene and total sugars and a lower rate of respiration.