Chalcone isomerase (CHI) is a key enzyme involved in anthocyanin metabolism. Previous research on CHI has mainly focused on cDNA cloning and gene expression. In the current study, the 1425-bp potato CHI promoter (PCP) was isolated from four potato cultivars (Heijingang, Zhongshu 7, Désirée, and Favorita) using PCR and DNA sequencing. The PCP contained many cis-regulatory elements (CREs) related...

We evaluated the population dynamics of Colorado potato beetle in processing tomatoes and potatoes using immigration proÞles, density through time, rates of development and survivorship. We also evaluated the beetleÕs inßuence on yield of processing cultivars. Colorado potato beetle immigrated into both crops. The Þrst available crop had the earliest immigration event and higher immigrating adu...

In this study, we selected four different color fleshed sweet potatoes, purple(Jizi 01), red(Xinong 431), yellow(Beijing 553) and white(Shangshu 19) fleshed cultivars as test materials, analyzed nutrient composition, dietary fiber content, anthocyanins quantification, and total phenolics content, and also measured their total antioxidant activity in four different types of sweet potato. In view...

Zarzecka K., Gugała M. (2018): The effect of herbicides and biostimulants on sugars content in potato tubers. Plant Soil Environ., 64: 82–87. The objective of the present work was to determine changes in total sugars, reducing sugars and sucrose content in potato tubers under conditions involving an application of biostimulants and herbicides. Research material included table potato tubers obta...

The oomycete Phytophthora infestans causes late blight of potato, which can completely destroy the crop. Therefore, for the past 160 years, late blight has been the most important potato disease worldwide. The identification of cultivars with high and durable field resistance to P. infestans is an objective of most potato breeding programs. This type of resistance is polygenic and therefore qua...

The paper addresses environmental concerns raised for transgenic potatoes with increased resistance to insects or viruses and discusses whether transgenic potato cultivars are different from traditionally bred cultivars. Iftransgenic potatoes are cultivated in regions with interfertile species, gene transfer to wild relatives will occur. This has implications on the potential for increasedfitne...

Simple sequence repeat (SSR) is a popular tool for individual fingerprinting. The long-core motif (e.g. tetra-, penta-, and hexa-nucleotide) simple sequence repeats (SSRs) are preferred because they make it easier to separate and distinguish neighbor alleles. In the present study, a new set of 8 tetra-nucleotide SSRs in potato (Solanum tuberosum) is reported. By using these 8 markers, 72 out of...

The aim of the research was to determine field, greenhouse and seed bed performance of plantlets derived from in vitro propagated plantlets of three potato cultivars. Generally, higher values were obtained from the mid-early maturing cultivar Marabel, compare to other cultivars (early cultivar Velox and and mid-early cultivar Concorde) for tuber yield, tuber number and average tuber weight. For...

The potato (Solanum tuberosum L.) ranks third in worldwide consumption among food crops. Whereas disposal of potato peels poses significant challenges for the food industry, secondary metabolites in these tissues are also bioactive and essential to crop development. The diverse primary and secondary metabolites reported in whole tubers and wound-healing tissues prompted a comprehensive profilin...

Anthocyanins from purple sweet potatoes can serve as natural colorants due to their high heat and light stability and are commonly used in juices, alcoholic beverages, jams, confectioneries, bread, snacks and noodles. There are several commercially available varieties of purple sweet potatoes, which can vary in storage root size, shape, and color. During the last decade sweet potato cultivars w...