A5067431279- Light effects on plants
- Plant Molecular Biology Research
- Photosynthetic Processes and Mechanisms
- Circadian rhythm and melatonin
- Plant responses to elevated CO2
- Plant Water Relations and Carbon Dynamics
- Cardiovascular and exercise physiology
- Virology and Viral Diseases
- Plant Gene Expression Analysis
- Respiratory viral infections research
- Sports Performance and Training
- Neurobiology and Insect Physiology Research
- Wheat and Barley Genetics and Pathology
- Plant and Biological Electrophysiology Studies
- Plant Reproductive Biology
- Topic Modeling
- Plant and animal studies
- Mosquito-borne diseases and control
- Authorship Attribution and Profiling
- Cardiovascular Effects of Exercise
- Hate Speech and Cyberbullying Detection
Hebrew University of Jerusalem
2007-2024
Institute of Life Sciences
2024
Johns Hopkins University
2013
Hebrew College
2013
Southern Illinois University Carbondale
2008
University of California, Los Angeles
1998-2002
Salk Institute for Biological Studies
1998-1999
Abstract Circadian rhythms have been demonstrated in organisms across the taxonomic spectrum. In view of their widespread occurrence, adaptive significance these is interest. We previously shown that constitutive expression theCCA1 (CIRCADIAN CLOCK ASSOCIATED 1) gene Arabidopsis plants (CCA1-ox) results loss circadian rhythmicity. Here, we demonstrate CCA1-ox retain ability to respond diurnal changes light. Thus, transcript levels several circadian-regulated genes, as well CCA1 itself and...
The circadian clock-associated 1 (CCA1) gene encodes a Myb-related transcription factor that has been shown to be involved in the phytochrome regulation of Lhcb1*3 expression and function oscillator Arabidopsis thaliana . By using yeast interaction screen identify proteins interact with CCA1, we have isolated cDNA clone encoding regulatory (β) subunit protein kinase CK2 designated it as CKB3 is only reported example third β-subunit found any organism. interacts specifically CCA1 both...
A wide range of processes in plants, including expression certain genes, is regulated by endogenous circadian rhythms. The clock-associated 1 (CCA1) and the late elongated hypocotyl (LHY) proteins have been shown to be closely associated with clock function Arabidopsis thaliana. protein kinase CK2 can interact phosphorylate CCA1, but its role regulation remains unknown. Here we show that plants overexpressing CKB3, a regulatory subunit CK2, display increased activity shorter periods rhythmic...
As an adaptation to life in a world with predictable daily changes, most eukaryotes and some prokaryotes have endogenous circadian (approximately 24 h) clocks. In plants, the clock regulates diverse range of cellular physiological events from gene expression protein phosphorylation calcium oscillations, hypocotyl growth, leaf movements, photoperiod-dependent flowering. Arabidopsis (Arabidopsis thaliana), as other model organisms, such Drosophila (Drosophila melanogaster) mice, rhythms are...
Abstract Endogenous circadian rhythms are almost ubiquitous among organisms from cyanobacteria to mammals and regulate diverse physiological processes. It has been suggested that having an endogenous system enables organism anticipate periodic environmental changes adapt its developmental states accordingly, thus conferring a fitness advantage. However, it is hard measure directly there is, date, only limited evidence supporting the assumption can increase therefore be adaptive. In this...
The circadian system of plants regulates a wide range rhythmic physiological and cellular output processes with period about 24 h. rhythms are generated by an oscillator mechanism that, in Arabidopsis, consists interlocking feedback loops several components including CIRCADIAN CLOCK ASSOCIATED 1 (CCA1), LATE ELONGATED HYPOCOTYL (LHY), TIMING OF CAB EXPRESSION (TOC1) CCA1 HIKING EXPEDITION (CHE). Over recent years, researchers have gained detailed picture the clock at resolution whole plant...
The endogenous circadian (∼24 h) system allows plants to anticipate and adapt daily environmental changes. Stomatal aperture is one of the many processes under control; stomatal opening closing occurs constant conditions, even in absence cues. To understand significance circadian-mediated anticipation opening, we have generated SGC (specifically guard cell) Arabidopsis (Arabidopsis thaliana) which oscillator gene CIRCADIAN CLOCK ASSOCIATED1 (CCA1) was overexpressed control...
In plants, the circadian system controls a plethora of processes, many with agronomic importance, such as photosynthesis, photoprotection, stomatal opening, and photoperiodic development, well molecular gene expression. It has been suggested that modifying rhythms may be means to manipulate crops develop improved plants for agriculture. However, there is very little information on how clock influences performance crop plants. We used noninvasive, high-throughput technique, based prompt...
The circadian clock is an endogenous mechanism that generates rhythms with approximately 24-h period and enables plants to predict adapt daily seasonal changes in their environment. These are generated by molecular oscillators Arabidopsis (Arabidopsis thaliana) have been shown consist of interlocking feedback loops involving a number elements. An important characteristic they can be entrained environmental light temperature. Previous work has one possible entrainment point for the oscillator...
Summary The Arabidopsis circadian system regulates the expression of up to 36% nuclear genome, including many genes that encode photosynthetic proteins. nuclear‐encoded photosynthesis is also regulated by signals from chloroplasts, a process known as retrograde signaling. We have identified CHLOROPLAST RNA BINDING (CRB), putative RNA‐binding protein, and shown it important for proper functioning chloroplast. crb plants are smaller paler than wild‐type plants, altered chloroplast morphology...
Endogenous (˜24 circadian) rhythms control an enormously diverse range of processes in plants and are, increasingly, the target studies aimed at understanding plant performance. Although previous few decades most circadian research has focused on Arabidopsis, there is a pressing need for low-cost, high-throughput tools analyzing wider variety species. The present contribution investigates using temperature oscillations as novel marker assaying rhythms. A thermal imaging platform was set up...
Studies are increasingly showing that metabolic and circadian (~24 h) pathways strongly interconnected, with the system regulating state of cell, products feeding back to entrain oscillator. In plants, probably most significant impact on metabolism is in its reciprocal regulation photosynthesis; however, by which this occurs still poorly understood. We have previously shown members basic helix-loop-helix (bHLH) transcription factor PHYTOCHROME INTERACTING FACTOR (PIF) family involved...
The circadian (~24 h) clock has an enormous influence on the biology of plants and controls a plethora processes including growth, photosynthesis, photoperiodic flowering transcription more than 30% genome. oscillator mechanism that generates these rhythms consists interlocking feedback loops. CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) is single MYB-transcription factor with key role in main loop. CCA1 regulation important for correct function may be integration point environmental signals such as...
Abstract We have used a counter-selection strategy based on aberrant phytochrome regulation of an Lhcb gene to isolate Arabidopsis mutant designated shygrl1(shg1). shg1 seedlings reduced phytochrome-mediated induction the family, but normal several other genes, including rbcS1a gene. Additional phenotypes observed in plants include chlorophyll leaves and additional photomorphogenic abnormalities when are grown medium containing sucrose. Mutations TATA-proximal region Lhcb1*3 promoter that...
Acute heat episodes (heatwaves) present some of the most significant challenges for plants growing in both natural and agricultural settings. Circadian systems are molecular time-pacing mechanisms responsible synchronizing a wide range rhythmic physiological processes with appropriate time day. We hypothesized that circadian system may contribute to capacity wild barley withstand extreme events. have used chlorophyll fluorescence analyse rhythms panel (Hordeum spontaneum) accessions from...