A5060263216- Insect-Plant Interactions and Control
- Plant Parasitism and Resistance
- Plant Stress Responses and Tolerance
- Photosynthetic Processes and Mechanisms
- Plant and animal studies
- Plant Molecular Biology Research
- Plant-Microbe Interactions and Immunity
- Horticultural and Viticultural Research
- Plant Pathogens and Fungal Diseases
- Light effects on plants
- Plant Reproductive Biology
- Selenium in Biological Systems
- Allelopathy and phytotoxic interactions
- Plant Gene Expression Analysis
- Plant responses to water stress
- Aluminum toxicity and tolerance in plants and animals
- Mercury impact and mitigation studies
- Mycorrhizal Fungi and Plant Interactions
- Microtubule and mitosis dynamics
- Plant nutrient uptake and metabolism
- Heavy Metal Exposure and Toxicity
- Biochemical and biochemical processes
- Insect and Pesticide Research
- Plant Pathogenic Bacteria Studies
- Ginseng Biological Effects and Applications
Karlsruhe Institute of Technology
2016-2025
Institute of Agrobiological Sciences
2007-2015
University of Freiburg
2002-2007
Hitachi (Japan)
2003
Ruhr University Bochum
2003
Two photomorphogenic mutants of rice, coleoptile photomorphogenesis 2 (cpm2) and hebiba, were found to be defective in the gene encoding allene oxide cyclase (OsAOC) by map-based cloning complementation assays. Examination enzymatic activity recombinant GST-OsAOC indicated that OsAOC is a functional enzyme involved biosynthesis jasmonic acid related compounds. The level jasmonate was extremely low both mutants, agreement with fact rice has only one cyclase. Several flower-related mutant...
Early stages of a beneficial relationship Plants benefit from widespread symbiosis with arbuscular mycorrhizal fungi. This between plant and fungus aids plants in capturing mineral micronutrients the soil. Gutjahr et al. have now identified component an intracellular receptor, hydrolase DWARF 14 LIKE, required rice roots for initiating symbiosis. A similar receptor detects karrikins smoke that signal opportunity fireweed to grow after forest fire. Science , this issue p. 1521
We elucidate grapevine evolution and domestication histories with 3525 cultivated wild accessions worldwide. In the Pleistocene, harsh climate drove separation of grape ecotypes caused by continuous habitat fragmentation. Then, occurred concurrently about 11,000 years ago in Western Asia Caucasus to yield table wine grapevines. The domesticates dispersed into Europe early farmers, introgressed ancient western ecotypes, subsequently diversified along human migration trails muscat unique...
Salinity stress represents a global constraint for rice, the most important staple food worldwide. Therefore role of central signal jasmonate salt response was analysed in rice comparing responses to two jasmonic acid (JA) biosynthesis mutants (cpm2 and hebiba) impaired function ALLENE OXIDE CYCLASE (AOC) their wild type. The aoc were less sensitive stress. Interestingly, both accumulated smaller amounts Na+ ions leaves, showed better scavenging reactive oxygen species (ROS) under Leaves...
Salt stress is a major constraint for many crop plants, such as the moderately salt-sensitive economically important fruit grapevine.Plants have evolved different strategies protection against salinity and drought.Jasmonate signalling central element of both biotic abiotic responses.To discriminate quality, there must be cross-talk with parallel signal chains.Using two grapevine cell lines differing in salt tolerance, response jasmonate ZIM/tify-domain (JAZ/TIFY) proteins (negative...
Cadmium (Cd) and arsenic (As), non essential, but toxic, elements for animals plants are frequently present in paddy fields. Oryza sativa L., a staple food at least the half of world population, easily absorbs As Cd by root, this organ pollutants evoke consistent damages, reducing/modifying root system. Auxins key hormones regulating all developmental processes, including organogenesis. Moreover, respond to environmental stresses, such as those caused As, changing levels distribution...
Abstract Induced defenses play a key role in plant resistance against leaf feeders. However, very little is known about the signals that are involved defending plants root feeders and how they influenced by abiotic factors. We investigated these aspects for interaction between rice (Oryza sativa) two root-feeding insects: generalist cucumber beetle (Diabrotica balteata) more specialized water weevil (Lissorhoptrus oryzophilus). Rice responded to attack increasing production of jasmonic acid...
The elongation of rice (Oryza sativa) coleoptiles is inhibited by light, and this photoinhibition was used to screen for mutants with impaired light response. In one the isolated mutants, hebiba, coleoptile stimulated in presence red but dark. Light responses endogenous indolyl-3-acetic acid abscisic were identical between wild type mutant. contrast, showed a dramatic increase jasmonate heralded corresponding increases content its precursor o-phytodienoic acid, whereas both compounds not...
Plant roots play important roles not only in the absorption of water and nutrients, but also stress tolerance. Previously, we identified RSOsPR10 as a root-specific pathogenesis-related (PR) protein induced by drought salt treatments rice. Transcripts proteins were strongly jasmonate (JA) ethylene (ET) precursor 1-aminocyclopropane-1-carboxylic acid (ACC), while salicylic (SA) almost completely suppressed these inductions. Immunohistochemical analyses showed that accumulated cortex cells...
It is widely known that numerous adaptive responses of drought-stressed plants are stimulated by chemical messengers as phytohormones. Jasmonic acid (JA) one such kind phytohormone. But there very few reports revealing its direct implication in drought related or cross-talk with other In this study, we compared the morpho-physiological traits and root proteome a wild type (WT) rice plant JA biosynthesis mutant coleoptile photomorphogenesis 2 (cpm2), disrupted allene oxide cyclase (AOC) gene,...
Jasmonic acid (JA) is an important negative regulator of light-regulated coleoptile elongation in rice. We isolated rice JASMONATE RESISTANT 1 (osjar1) mutants from the Tos17 mutant panel by BLAST search. In far-red and blue lights, osjar1 coleoptiles were longer if compared with wild type (WT), indicating that OsJar1 participates suppression these light conditions, while did not show a clear phenotype red light. The analysis expression phytochrome (phy) revealed A (phyA) B (phyB) act...
Stilbene synthase is a key enzyme for the production of phytoalexin resveratrol. Some clones Vitis sylvestris, wild European grapevine species which almost extinct, have been shown to accumulate more resveratrol in response different forms stress. In current study, we asked whether induction stilbene transcripts Hoe29, one V. sylvestris with elevated inducibility, might result from transcription factor MYB14. The MYB14 promoter Hoe29 and Ke83 (a second stilbene-inducible genotype) harboured...
Productivity of important crop rice is greatly affected by salinity. The plant hormone jasmonate plays a vital role in salt stress adaptation, but also evokes detrimental side effects if not timely shut down again. As novel strategy to avoid such effects, OsJAZ8, negative regulator signalling, expressed under control the salt-inducible promoter transcription factor ZOS3-11, obtain transient signature response stress. To modulate time course either full-length or dominant C-terminally...
Soil pollutants may affect root growth through interactions among phytohormones like auxin and jasmonates. Rice is frequently grown in paddy fields contaminated by cadmium arsenic, but the effects of these on jasmonates/auxin crosstalk during adventitious lateral roots formation are widely unknown. Therefore, seedlings Oryza sativa cv. Nihonmasari jasmonate-biosynthetic mutant coleoptile photomorphogenesis2 were exposed to and/or jasmonic acid methyl ester, then analysed morphological,...
Abstract Background The annual yield losses caused by the Rice Blast Fungus, Magnaporthe oryzae , range to equivalent for feeding 60 million people. To ward off infection this fungus, rice has evolved a generic basal immunity (so called compatible interaction), which acts in concert with strain-specific defence (so-called incompatible interaction). plant-defence hormone jasmonic acid (JA) promotes resistance M. but underlying mechanisms remain elusive. get more insight into open question, we...
Sucrose, the primary carbon form synthesized by photosynthesis, is transported via phloem for proper plant development and productivity. However, long-distance sucrose transport can become unbalanced under adverse environmental conditions. Therefore, we highlight influence of salt stress on sugar partitioning in source versus sink tissues sorghum generative including role induced transporter expression. The two genotypes displayed different responses to salinity terms resource allocation,...
The bioactive form of jasmonate is the conjugate amino acid isoleucine (Ile) with jasmonic (JA), which biosynthesized in a reaction catalysed by GH3 enzyme JASMONATE RESISTANT 1 (JAR1). We examined biochemical properties OsJAR1 and its involvement photomorphogenesis rice (Oryza sativa). has similar substrate specificities as orthologue Arabidopsis. However, osjar1 loss-of-function mutants did not show severe coleoptile phenotypes JA-deficient 2 (cpm2) hebiba, develop long coleoptiles all...
Up to 1 billion people are affected by low intakes of the essential nutrient selenium (Se) due concentrations in crops. Biofortification this micronutrient plants is an attractive way increasing dietary Se levels. We investigated a promising method biofortification rice seedlings, as primary staple for 3 people, but naturally contains concentrations. studied hydroponic uptake 0–2500 ppb Se, potential phyto-toxicological effects and speciation along shoots roots function added species, other...
Cytoplasmic male sterile (CMS) rice has been widely used for hybrid seed production in China. However, CMS suffers from undesirable flowering habits including scattered floret opening time (FOT), which causes different FOTs among parental plants and greatly reduces production. Little is known about the mechanism of FOT rice. Our results demonstrate that Zhenshan 97A (ZS97A) resulted lack a driving force to open florets, was directly caused by retarded lodicule expansion. indicate expansion...
Jasmonate (JA) signaling and functions have been established in rice development response to a range of biotic or abiotic stress conditions. However, information on the molecular actors mechanisms underlying turnover bioactive jasmonoyl-isoleucine (JA-Ile) is very limited this plant species. Here we explored two gene families which some members were described previously Arabidopsis encode enzymes metabolizing JA-Ile hormone, namely cytochrome P450 CYP94 subfamily (CYP94, 20 members)...
Summary Grapevine trunk diseases have devastating consequences on vineyards worldwide. European wild grapevines ( Vitis vinifera subs. sylvestris ) from the last viable population in Germany along Rhine river showed variable degrees of resistance against Neofusicoccum parvum (strain Bt‐67), a fungus associated with Botryosphaeriaceae‐related dieback. Representative genotypes different subclades this were mapped respect to their ability induce wood necrosis, as well defence responses...