Georg Jander
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View article: Success and limitations in adaptation of Fast-TrACC tissue culture-independent transformation in coffee, cotton, and tree tobacco
Success and limitations in adaptation of Fast-TrACC tissue culture-independent transformation in coffee, cotton, and tree tobacco Open
Plant transformation is a critical process for generating transgenic and genome-edited plants for use in research and agriculture. For most plant species, this process has traditionally involved genomic insertion of DNA in tissue culture a…
View article: Identification of UDP-dependent glycosyltransferases in the wallflower cardenolide biosynthesis pathway
Identification of UDP-dependent glycosyltransferases in the wallflower cardenolide biosynthesis pathway Open
Cardenolides are potent plant-defensive metabolites that have been studied for decades for their significance in plant-insect interactions and their use in treating heart failure in humans. With recent advancements in genome and transcript…
View article: 2-Oxoglutarate-dependent dioxygenases contribute to cardenolide biosynthesis in <i>Erysimum cheiranthoides</i> (wormseed wallflower)
2-Oxoglutarate-dependent dioxygenases contribute to cardenolide biosynthesis in <i>Erysimum cheiranthoides</i> (wormseed wallflower) Open
Summary Cardenolide biosynthesis evolved convergently in several plant lineages, including wallflowers ( Erysimum , Brassicaceae). Although the first steps of the biosynthetic pathway, which involve conversion of sterols to pregnane deriva…
View article: Genome and Tissue‐Specific Transcriptome of the Tropical Milkweed ( <scp> <i>Asclepias curassavica</i> </scp> )
Genome and Tissue‐Specific Transcriptome of the Tropical Milkweed ( <span> <i>Asclepias curassavica</i> </span> ) Open
Tropical milkweed ( Asclepias curassavica ) serves as a host plant for monarch butterflies ( Danaus plexippus ) and other insect herbivores that can tolerate the abundant cardiac glycosides that are characteristic of this species. Cardiac …
View article: Modification of Non-photochemical Quenching Pathways in the C<sub>4</sub>Model Plant <i>Setaria viridis</i> Revealed Shared and Unique Photoprotection Mechanisms as Compared to C<sub>3</sub>Plants
Modification of Non-photochemical Quenching Pathways in the C<sub>4</sub>Model Plant <i>Setaria viridis</i> Revealed Shared and Unique Photoprotection Mechanisms as Compared to C<sub>3</sub>Plants Open
Summary Light is essential for photosynthesis; however, excess light can increase the accumulation of photoinhibitory reactive oxygen species that reduce photosynthetic efficiency. Plants have evolved photoprotective non-photochemical quen…
View article: Overexpression of Xanthophyll Cycle Genes Leads to Faster NPQ Acclimation in the C4 Monocot<i>Setaria viridis</i>
Overexpression of Xanthophyll Cycle Genes Leads to Faster NPQ Acclimation in the C4 Monocot<i>Setaria viridis</i> Open
Slow relaxation and induction of Non-Photochemical Quenching (NPQ) limits plant productivity under fluctuating light in C3 plants but it is unknown if this trait extends to C4 plants. Three genes have been implicated in determining NPQ ind…
View article: Catechol acetylglucose: a newly identified benzoxazinoid‐regulated defensive metabolite in maize
Catechol acetylglucose: a newly identified benzoxazinoid‐regulated defensive metabolite in maize Open
Summary An enormous diversity of specialized metabolites is produced in the plant kingdom, with each individual plant synthesizing thousands of these compounds. Previous research showed that benzoxazinoids, the most abundant class of speci…
View article: COI1 F-box proteins regulate DELLA protein levels, growth, and photosynthetic efficiency in maize
COI1 F-box proteins regulate DELLA protein levels, growth, and photosynthetic efficiency in maize Open
The F-box protein Coronatine Insensitive (COI) is a receptor for the jasmonic acid signaling pathway in plants. To investigate the functions of the 6 maize (Zea mays) COI proteins (COI1a, COI1b, COI1c, COI1d, COI2a, and COI2b), we generate…
View article: Catechol acetylglucose: A newly identified benzoxazinoid-regulated defensive metabolite in maize
Catechol acetylglucose: A newly identified benzoxazinoid-regulated defensive metabolite in maize Open
An enormous diversity of specialized metabolites is produced in the plant kingdom, with each individual plant synthesizing thousands of these compounds. Previous research showed that benzoxazinoids, the most abundant class of specialized m…
View article: Serine proteinase inhibitors from <scp><i>Nicotiana benthamiana</i></scp>, a nonpreferred host plant, inhibit the growth of <scp><i>Myzus persicae</i></scp> (green peach aphid)
Serine proteinase inhibitors from <span><i>Nicotiana benthamiana</i></span>, a nonpreferred host plant, inhibit the growth of <span><i>Myzus persicae</i></span> (green peach aphid) Open
BACKGROUND The green peach aphid ( Myzus persicae ) is a severe agricultural crop pest that has developed resistance to most current control methods, requiring the urgent development of novel strategies. Plant proteinase inhibitors (PINs) …
View article: Four enzymes control natural variation in the steroid core of<i>Erysimum</i>cardenolides
Four enzymes control natural variation in the steroid core of<i>Erysimum</i>cardenolides Open
Plants commonly produce families of structurally related metabolites with similar defensive functions. This apparent redundancy raises the question of underlying molecular mechanisms and adaptive benefits of such chemical variation. Carden…
View article: Regulation of Arabidopsis polyamine acetylation by NATA1 and NATA2
Regulation of Arabidopsis polyamine acetylation by NATA1 and NATA2 Open
Polyamines have vital functions in organisms, including bacteria, plants, and animals, with key roles in growth, development, and stress responses. Spermine/spermidine N 1-acetyl transferases (SSATs) regulate polyamine abundance by catalys…
View article: Knockout mutations of<i>Nicotiana benthamiana</i>defenses reveal the relative importance of acylsugars, nicotine, and a serine protease inhibitor in a natural setting
Knockout mutations of<i>Nicotiana benthamiana</i>defenses reveal the relative importance of acylsugars, nicotine, and a serine protease inhibitor in a natural setting Open
Summary Plants produce an immense diversity of defensive specialized metabolites. However, despite extensive functional characterization, the relative importance of different defensive compounds is rarely examined in natural settings. Here…
View article: Aphid Resistance Segregates Independently of Cardenolide and Glucosinolate Content in an Erysimum cheiranthoides (Wormseed Wallflower) F2 Population
Aphid Resistance Segregates Independently of Cardenolide and Glucosinolate Content in an Erysimum cheiranthoides (Wormseed Wallflower) F2 Population Open
Plants in the genus Erysimum produce both glucosinolates and cardenolides as a defense mechanism against herbivory. Two natural isolates of Erysimum cheiranthoides (wormseed wallflower) differed in their glucosinolate content, cardenolide …
View article: Cardiac glycosides protect wormseed wallflower ( <i>Erysimum cheiranthoides</i> ) against some, but not all, glucosinolate‐adapted herbivores
Cardiac glycosides protect wormseed wallflower ( <i>Erysimum cheiranthoides</i> ) against some, but not all, glucosinolate‐adapted herbivores Open
Summary The chemical arms race between plants and insects is foundational to the generation and maintenance of biological diversity. We asked how the evolution of a novel defensive compound in an already well‐defended plant lineage impacts…
View article: Aphid resistance segregates independently of cardiac glycoside and glucosinolate content in an<i>Erysimum cheiranthoides</i>(wormseed wallflower) F2 population
Aphid resistance segregates independently of cardiac glycoside and glucosinolate content in an<i>Erysimum cheiranthoides</i>(wormseed wallflower) F2 population Open
Plants in the genus Erysimum produce both glucosinolates and cardiac glycosides as defense against herbivory. Two natural isolates of Erysimum cheiranthoides (wormseed wallflower) differed in their glucosinolate content, cardiac glycoside …
View article: Genome and tissue-specific transcriptome of the tropical milkweed (<i>Asclepias curassavica</i>)
Genome and tissue-specific transcriptome of the tropical milkweed (<i>Asclepias curassavica</i>) Open
Tropical milkweed ( Asclepias curassavica ) serves as a host plant for monarch butterflies ( Danaus plexippus ) and other insect herbivores that can tolerate the abundant cardiac glycosides that are characteristic of this species. Cardiac …
View article: Fatty alcohols, a minor component of the tree tobacco surface wax, are associated with defence against caterpillar herbivory
Fatty alcohols, a minor component of the tree tobacco surface wax, are associated with defence against caterpillar herbivory Open
Despite decades of research resulting in a comprehensive understanding of epicuticular wax metabolism, the function of these almost ubiquitous metabolites in plant–herbivore interactions remains unresolved. In this study, we examined the e…
View article: Cardiac glycosides protect wormseed wallflower (<i>Erysimum cheiranthoides</i>) against some, but not all, glucosinolate-adapted herbivores
Cardiac glycosides protect wormseed wallflower (<i>Erysimum cheiranthoides</i>) against some, but not all, glucosinolate-adapted herbivores Open
SUMMARY The chemical arms race between plants and insects is foundational to the generation and maintenance of biological diversity. We asked how the evolution of a novel defensive compound in an already well-defended plant lineage impacts…
View article: Reversing the escape from herbivory: Knockout of cardiac glycoside biosynthesis in wormseed wallflower (Erysimum cheiranthoides L., Brassicaceae)
Reversing the escape from herbivory: Knockout of cardiac glycoside biosynthesis in wormseed wallflower (Erysimum cheiranthoides L., Brassicaceae) Open
Like other members of the Brassicaceae, plants in the wallflower genus (Erysimum) produce glucosinolates, which are potent defenses against a wide range of herbivores. As a more recently evolved second line of defense, Erysimum produces ca…
View article: Cytokinin Promotes Jasmonic Acid Accumulation in the Control of Maize Leaf Growth
Cytokinin Promotes Jasmonic Acid Accumulation in the Control of Maize Leaf Growth Open
Plant organ growth results from the combined activity of cell division and cell expansion. The co-ordination of these two processes depends on the interplay between multiple hormones that determine the final organ size. Using the semidomin…
View article: Serine proteinase inhibitors from<i>Nicotiana benthamiana</i>, a non-preferred host plant, inhibit the growth of<i>Myzus persicae</i>(green peach aphid)
Serine proteinase inhibitors from<i>Nicotiana benthamiana</i>, a non-preferred host plant, inhibit the growth of<i>Myzus persicae</i>(green peach aphid) Open
The green peach aphid ( Myzus persicae ) is a severe agricultural crop pest that has developed resistance to most current control methods, requiring the urgent development of novel strategies. Plant proteinase inhibitors (PINs) are small p…
View article: Maize<i>COI1</i>quadruple-knockout mutants exhibit elevated DELLA protein accumulation, stunted growth, and reduced photosynthetic efficiency
Maize<i>COI1</i>quadruple-knockout mutants exhibit elevated DELLA protein accumulation, stunted growth, and reduced photosynthetic efficiency Open
The F-box protein Coronatine Insensitive (COI) is a receptor for the jasmonic acid signaling pathway in plants. To investigate the functions of the six maize COI proteins (COI1a, COI1b, COI1c, COI1d, COI2a, and COI2b), we made single, doub…
View article: Inoculation of Maize with Sugarcane Mosaic Virus Constructs and Application for RNA Interference in Fall Armyworms
Inoculation of Maize with Sugarcane Mosaic Virus Constructs and Application for RNA Interference in Fall Armyworms Open
Virus-mediated transient gene overexpression and gene expression silencing can be used to screen gene functions in plants. Sugarcane mosaic virus (SCMV) is a positive strand RNA virus in the Potyviridae family that has been modified to be …
View article: Horizontally transferred genes as <scp>RNA</scp> interference targets for aphid and whitefly control
Horizontally transferred genes as <span>RNA</span> interference targets for aphid and whitefly control Open
Summary RNA interference (RNAi)‐based technologies are starting to be commercialized as a new approach for agricultural pest control. Horizontally transferred genes (HTGs), which have been transferred into insect genomes from viruses, bact…