Recently, we isolated dehydroipomeamarone, a new sesquiterpenoid from sweet potato (Ipomoea batatas Lam.) root tissue infected with Ceratocystis fimbriata (Ell. et Halst.). The purpose of this investigation was to determine whether dehydroipomeamarone was a precursor in the biosynthetic pathway of ipomeamarone. The incorporation of acetate-2-(14)C into ipomeamarone was markedly inhibited by the...

The exposure of dark-grown Pharbitis nil seedlings to continuous R induces a rapid decrease in PHYA mRNA abundance with a half-life of about 2 h. A 5 min R pulse also induces this decline, and the effect is partially reversible by subsequent FR irradiation, confirming that the regulation of expression is mediated via the Pfr form of a phytochrome. When de-etiolated seedlings are returned to dar...

objective: ipomoea mauritiana is used in both ayurveda and folk medicine systems. the tuberous roots are known to be diuretic, depurative, carminative, and anthelmintic. the objective of the current study was to identify phenolic antioxidants from i. mauritiana using spectrophotometric and lc-ms analysis. materials and methods: an activity-guided fractionation and purification process was used t...

The effects of photoperiod on floral and vegetative development of Pharbitis nil were modified by atmospheric CO(2) concentrations maintained during plant growth. Short day (SD) photoperiods caused rapid flowering in Pharbitis plants growing in 0.03 or 0.1% CO(2), while plants in long day (LD) conditions remained vegetative. At 1 or 5% CO(2), however, flower buds were developed under both the S...

O n his voyages across the Pacific, Captain James Cook encountered geographically disparate Polynesian societies, including those living on Easter Island, Hawai’i, and the north island of New Zealand. These far-flung communities cultivated a South American domesticate, the sweet potato (Ipomoea batatas). Subsequent debates concerning the timing and nature of the dispersals of sweet potato into ...

In both short-day and long-day plants, endogenous rhythms apparently are involved in photoperiodic response. One line of the evidence is a rhythmic flowering response to cycle length (1, 3,4, 6,9), and another is the rhythmic effectiveness of light breaks given at different points in very long dark periods (2, 4,6,8, 10). Phlarbitis nil, strain Violet, is an extremely sensitive short-day plant....

Previously we showed that acid invertase activity increased and then decreased rapidly in wounded sweet potato (Ipomoea batatas Liam.) root tissue, and that the tissue contained a heat-stable, proteinaceous inhibitor with a molecular weight of about 19,500 daltons.In response to wounding of sweet potato root tissue, inhibitor activity decreased during the increase in invertase activity but late...

UNLABELLED Proteins isolated from sweet potatoes (Ipomoea batatas) have been shown to possess antidiabetic, antioxidant, and antiproliferative properties. The objective of this study was to chemically optimize a process for extracting proteins from sweet potato peel. The extraction procedure involved mixing peel with saline solvent to dissolve proteins and then precipitating with CaCl(2). Quadr...

As hortaliças desempenham importante papel na alimentação humana, devido ao seu valor nutricional, sendo elas ricas em diversas vitaminas e minerais. principais produzidas no Brasil atualidade são a alface, batata, cenoura, cebola tomate. O objetivo deste trabalho foi trazer o cenário atual da demanda por sementes de hortaliças, bem como abordar os fatores que podem contribuir, tanto positivame...