Trine Hvoslef-Eide

Norwegian University of Life Sciences (NMBU); Norway · Department of Plant Sciences (IPV)

Sweet potato (Ipomoea batatas L. Lam.) is a major source of food in many parts of Ethiopia. In recent years, viral diseases have become the main threat to sweet potato production in Ethiopia. Previous virus survey studies carried out from 1986 to 2020 reported eight viruses infecting sweet potato in Ethiopia. Consequently, obtaining and multiplying...

The Entada landrace of enset (Ensete ventricosum (Welw.) Chessman) is probably the most unique indigenous crop in Ethiopia, being maintained and utilized by the Ari people in the South of Ethiopia. Here we describe genetic diversity, selection signatures and relationship of Entada with cultivated and wild enset using 117 Entada genotypes collected...

Potato is an important part of the traditional Norwegian diet, and the crop faces several challenges with respect to pests and diseases, as well as the increasingly challenging changes in climate. Genome editing may provide tools to improve the resilience of Norwegian potato cultivars to new climate challenges. We have altered the skin colour of tw...

Potato is an important part of the traditional Norwegian diet, and the crop faces several challenges with respect to pests and diseases, as well as the increasingly challenging changes in climate. Genome editing may provide tools to improve the resilience of Norwegian potato cultivars to new climate challenges. We have altered the skin colour of tw...

Enset (Ensete ventricosum (Welw.) Cheesman) is a multipurpose, drought-tolerant and a key food security crop, which is the staple food for peoples in the south and southwestern parts of Ethiopia. In this study, we characterized genetic diversity, population structure and selection signatures in 226 cultivated and 10 wild enset accessions collected...

Enset (Enseteventricosum (Welw.) Cheesman) is a multipurpose, drought-tolerant and a key food security crop, which is the staple food for peoples in the South and Southwestern parts of Ethiopia. Despite its importance, enset is an orphan crop as regards genetic research and breeding. In this study, we characterized genetic diversity, population str...

Last decade’s advances in biotechnology, with the introduction of CRISPR, have challenged the regulatory framework for competent authorities all over the world. Hence, regulatory issues related to gene editing are currently high on the agenda both in the EU and in the European Economic Area (EEA) Agreement country of Norway, particularly with regar...

Purpose: Due to environmental concerns, there is a demand to reduce the use of peat as a growing medium for horticultural crops. Simultaneously, there is an interest to recycle organic waste materials in the form of compost. This study aimed to document effects on growth, yield, and fruit quality of tomato plants when cultivated in a sewage digesta...

Background: Enset (Ensete ventricosum (Welw.) Cheesman) is a staple food for more than 20 million Ethiopians and only cultivated in the native indigenous farming systems of Ethiopia. In contrast to other cultivated species in the Musaceae family, enset has been relatively little studied at the molecular level. Application of advanced molecular gene...

Enset (Ensete ventricosum), is a perennial herbaceous plant belonging to the family Musaceae, along with banana and plantain. Despite wild populations occurring in eastern, central and southern Africa, it is only in Ethiopia that the crop has been domesticated, where it is culturally and agriculturally symbolic as a food security crop. Although an...

Developing a protocol for somatic embryogenesis (SE) for adult mother plants of Jatropha curcas, aids to overcome problems such as harvesting time and an uneven yield, providing the opportunity to propagate proven elite genotypes. Until now, several authors have achieved SE in J. curcas using different explants, however, in none of these protocols...

Products derived from agricultural biotechnology is fast becoming one of the biggest agricultural trade commodities globally, clothing us, feeding our livestock, and fueling our eco-friendly cars. This exponential growth occurs despite asynchronous regulatory schemes around the world, ranging from moratoriums and prohibitions on genetically modifie...

Pratylenchus goodeyi appears to be the most prevalent nematode pest of enset in Ethiopia, where it can occur in extremely high densities. However, the damage to yield or how different enset cultivars react to the nematode has yet to be determined. The current study therefore sought to establish a first assessment of these reactions by enset to P. g...

Enset ( Ensete ventricosum ) is an important starch staple crop, cultivated primarily in south and southwestern Ethiopia. Enset is the main crop of a sustainable indigenous African system that ensures food security in a country that is food deficient. Related to the banana family, enset is similarly affected by plant-parasitic nematodes. Plant-para...

The study of an anion-exchange resin (Amberlyst A26 (OH)) catalyzed transesterification of Jatropha (Jatropha curcas L.) oil was conducted to determine the effects of three variables: reaction temperature, ethanol: oil molar ratio and catalyst amount, on Jatropha oil conversion (XJO) and fatty acid ethyl esters yield’s (YFAEEs). The modified centra...

Sweet potato (Ipomoea batatas (L.) Lam.) is an important root crop for poor farmers in developing countries. Since the late 1980s, viral diseases have increasingly become a threat to sweet potato production in Ethiopia. This review paper presents the role of sweet potato production for ensuring food security, the level of sweet potato virus researc...

Sweet potato (Ipomoea batatas (L.) Lam.) is an important root crop for poor farmers in developing countries. Since the late 1980s, viral diseases have increasingly become a threat to sweet potato production in Ethiopia. This review paper presents the role of sweet potato production for ensuring food security, the level of sweet potato virus researc...

Sweet potato (Ipomoea batatas L. Lam) has become one of the staple crops in Africa in the last 20 years. In Ethiopia, sweet potato is the second most widely grown root crop and is the first regarding the production per hectare. Thus, there is a great demand of planting material throughout the country. Currently, planting material is usually obtaine...

Sweet potato (Ipomoea batatas (L.) Lam.) is an important root crop for poor farmers in developing countries. Since the late 1980s, viral diseases have increasingly become a threat to sweet potato production in Ethiopia. This review paper presents the role of sweet potato production for ensuring food security, the level of sweet potato virus researc...

Vegetatively propagated crops are exposed to pests every growing season, providing them with the opportunity to feed on the plants and transmit diseases. Meristem culture is an important method to clean for viruses to restore high yields. Media optimizations with different concentrations and combinations of 6-benzylamino purine (BAP) and Naphthalen...

Bemisia tabaci (Gennadius) is a polyphagous, highly destructive pest that is capable of vectoring viruses in most agricultural crops. Currently, information regarding the distribution and genetic diversity of B. tabaci in South Sudan is not available. The objectives of this study were to investigate the genetic variability of B. tabaci infesting sw...

Bemisia tabaci (Gennadius) is a polyphagous, highly destructive pest capable of vectoring viruses in most agricultural crops. Currently, information on the distribution and genetic diversity of B. tabaci in South Sudan is not available. The objectives of this study were to investigate the genetic variability of B. tabaci infesting sweet potato and...

There are different technologies for biodiesel production, each having its benefits and drawbacks depending on the type of feedstock and catalyst used. In this study, the techno-economic performances of four catalyst technologies were investigated. The catalysts were bulk calcium oxide (CaO), enzyme, nano-calcium oxide, and ionic liquid. The study...

Jatropha (Jatropha curcas L) seed contains non-edible oil, which is suitable for biodiesel production. The present research focused on the mathematical modelling of the drying kinetics of Jatropha seeds at a storage moisture content. The non-pretreated seeds (whole seeds) and pretreated seeds (crushed seeds) were dried at five different air tempera...

Enset (Ensete ventricosum (Welw.) Cheesman) is one of the Ethiopia’s indigenous sustainability crops supporting the livelihoods of about 20 million people, mainly in the densely populated South and Southwestern parts of the country. Enset serves as a food security crop for humans, animal feed, and source of fiber for the producers. The production o...

This is an article in a Norwegian trade journal in Horticulture on gene editing

Urban agriculture is important for NMBU and we are working on creating a Master Programme in Urban Agriculture in connection with the EU-project SiEUGreen

Background: Quantitative measurement of actual auxin levels in plant tissue is complimentary to molecular methods measuring the expression of auxin related genes. Current analytical methods to quantify auxin have pushed the limit of detection to where auxin can be routinely quantified at the pictogram (pg) level, reducing the amount of tissue need...

Anthocyanins are widely distributed, glycosylated, water-soluble plant pigments, which give many fruits and flowers their red, purple or blue colouration. Their beneficial effects in a dietary context have encouraged increasing use of anthocyanins as natural colourants in the food and cosmetic industries. However, the limited availability and diver...

Abstract Cities are dependent on large imports of water, food, and energy. In return they produce huge amounts of climate gases, solid and liquid waste. Emerging technologies can turn cities into important suppliers of fertilizer and soil amendment products and simultaneously convert cities into greener more sustainable areas that contribute to sol...

Plant research and breeding has a long and successful history in the Scandinavian countries Denmark, Finland, Norway and Sweden, and researchers in the region have been early in adopting plant gene technologies as they developed. This review gives a background, as well as discusses current and future progress of plant gene technology in these four...

Background In pea seeds (Pisum sativum L.), the presence of the Def locus determines abscission event between its funicle and the seed coat. Cell wall remodeling is a necessary condition for abscission of pea seed. The changes in cell wall components in wild type (WT) pea seed with Def loci showing seed abscission and in abscission less def mutant...

Abscission is a highly regulated and coordinated developmental process in plants. It is important to understand the processes leading up to the event, in order to better control abscission in crop plants. This has the potential to reduce yield losses in the field and increase the ornamental value of flowers and potted plants. A reliable method of a...

ANTHOPLUS yields anthocyanins in stable plant tissue cultures. We aim to produce purified anthocyanins, of novel complexity in side chain decoration, or labelled with stable isotopes for assaying the composition of feedstock for natural colors, bioavailability, bioefficacy and mechanistic research in experimental medicine and as analytical standard...

The def mutant pea (Pisum sativum L) showed non-abscission of seeds from the funicule. Here we present data on seed development and growth pattern and their relationship in predicting this particular trait in wild type and mutant lines as well as the inheritance pattern of the def allele in F2 and F3 populations. Pod length and seed fresh weight in...

Argyranthemum frutescens is a commercially important ornamental species with extensive breeding programmes in several countries. Since it is vegetatively propagated there is a great need for tools for identification of cultivars. Vegetatively propagated species require clean-up from diseases, often performed through meristem-tip cultures. Forty-thr...

Postharvest is here defined as including both senescence and abscission. Since there is a recent review on senescence, where the authors were to present at the same meeting, readers are referred to their contributions in this volume and their review (van Doorn and Woltering, 2008). However, some of the early work in carnation is briefly described....

In pea seeds (Pisum sativum L.), the Def locus defines an abscission event where the seed separates from the funicle through the intervening hilum region at maturity. A spontaneous mutation at this locus results in the seed failing to abscise from the funicle as occurs in wild type peas. In this work, structural differences between wild type peas t...

We investigated in vitro culture techniques to efficiently micropropagate the economically important flower plant, Gypsophila paniculata L., using stem segments as explants. We obtained multiple shoots using three different media, Alt1, RS1 and RS2 which all differed in macro and micro elements as well as growth regulators. RS2 gave the average max...

Somatic embryogenesis can be used to produce artificial seeds of Cyclamen persicum, one of the most important ornamental plants for the European market, both as a potted plant in northern Europe and a bedding plant in the cool winters in southern Europe. The aim of this study was to obtain new insights into the molecular biology of somatic embryoge...

Propagation in liquid culture, especially bioreactors, is one possible way to produce clonal propagules of Cyclamen persicum Mill. at a low cost. The current propagation method for C. persicum is from expensive hybrid seeds. This paper presents models of the potential effects of oxygen concentration, daily mean temperature, the difference between d...

Uapaca kirkiana Muell Arg. is one of the most popular indigenous fruit trees in the Miombo woodlands of southern Africa. An investigation into existing indigenous knowledge and socio-economic use of this fruit tree was conducted in Malawi. The survey revealed that U. kirkiana fruits contribute considerably to livelihood as a food supplement and for...

Alterations in the detection of cell wall polysaccharides during an induced abscission event in the pedicel of Euphorbia pulcherrima (poinsettia) have been determined using monoclonal antibodies and Fourier transform infrared (FT-IR) microspectroscopy. Concurrent with the appearance of a morphologically distinct abscission zone (AZ) on day 5 after...

Mass propagation through use of labour-saving techniques such as bioreactors and use of temporary immersion systems (TIS) has been the theme of several European network Actions through COST since 1982. Presently the working group dedicated to this field is named "Advanced Regeneration in vitro". We meet once a year to discuss our results and experi...

Poinsettia (Euphorbia pulcherrima) is a major ornamental pot plant in many countries. Two viruses, poinsettia mosaic virus (PnMV) and poinsettia cryptic virus, often infect modern poinsettia cultivars. To produce virus-resistant poinsettia plants,genetic engineering has been considered. Since there is no established methodavailable for the transfor...

There are many forms of begonias which are popular flowering potted plants and annual bedding plants for containers and hanging baskets, including tuberous, Elatior, Loraine, gracilis, semperflorens, and Rex. Begonias readily hybridise and many natural hybrids exist; new species are still being discovered around the globe. This exciting group of pl...

There are many forms of begonias which are popular flowering potted plants and annual bedding plants for containers and hanging baskets, including tuberous, Elatior, Loraine, gracilis, semperflorens, and Rex. Begonias readily hybridise and many natural hybrids exist; new species are still being discovered around the globe. This exciting group of pl...

Impatiens wallerana Imp atiens continues to lead as one of the three most important bedding plants worldwide. It is available as both seed and vegetative products. The history of its development, marketing success, wide adaptability, a large palette of flower colors and forms, and unparalleled garden performance as a bedding plant for shade are des...

Six identical bioreactors were constructed and built at the Agricultural University of Norway to provide optimal conditions for plant cell regeneration from cells into somatic embryos (clonal or somatic seeds). This was made possible through cooperation in COST87 by a European network in a working group on regeneration from plant cell cultures. The...

Six identical bioreactors were constructed and built at the Agricultural University of Norway to provide optimal conditions for plant cell regeneration from cells into somatic embryos (clonal or somatic seeds). This was made possible through cooperation in COST87 by a European network in a working group on regeneration from plant cell cultures. The...

Nutrition for in vitro and greenhouse production systems is reviewed and found to be broadly similar. The optimal pH (5.0–6.0) is independent of the growing system used, with some lower or higher pH values required for special crops. The pH of nutrient solutions is regulated either with acid or via the NH4:NO3 ratio. For in vitro solutions, it is p...

Automation of micropropagation via organogenesis or somatic embryogenesis in a bioreactor has been advanced as a possible way of reducing costs. Micropropagation by conventional techniques is typically a labour-intensive means of clonal propagation. The paper describes lower cost and less labour-intensive clonal propagation through the use of modif...

High-efficiency micropropagation, with relatively low labour costs, has been demonstrated in this unique book detailing liquid media systems for plant tissue culture. World authorities (e.g. von Arnold, Curtis, Takayama, Ziv) contribute seminal papers together with papers from researchers across Europe that are members of the EU COST Action 843 "Ad...