A5074018177- Photosynthetic Processes and Mechanisms
- Remote Sensing in Agriculture
- Plant Water Relations and Carbon Dynamics
- Greenhouse Technology and Climate Control
- Leaf Properties and Growth Measurement
- Plant responses to elevated CO2
- Biocrusts and Microbial Ecology
- Water Quality Monitoring and Analysis
- Metalloenzymes and iron-sulfur proteins
- Microbial Community Ecology and Physiology
- Algal biology and biofuel production
- Microbial Fuel Cells and Bioremediation
- Light effects on plants
- Electrocatalysts for Energy Conversion
- Horticultural and Viticultural Research
- Remote Sensing and LiDAR Applications
- Biofuel production and bioconversion
- Coral and Marine Ecosystems Studies
- Marine Biology and Ecology Research
- Plant-Microbe Interactions and Immunity
- Pharmacogenetics and Drug Metabolism
- Marine and coastal plant biology
- Probiotics and Fermented Foods
- Postharvest Quality and Shelf Life Management
- Plant Physiology and Cultivation Studies
Migal - Galilee Technology Center
2019-2025
Israel Oceanographic and Limnological Research
2023-2024
Hebrew University of Jerusalem
2023
Smith Institute
2023
University of Haifa
2016-2022
Tel Aviv University
2016-2017
Interuniversity Institute for Marine Sciences in Eilat
2016
Carmel (Israel)
2016
Agricultural Research Organization
2008
Ben-Gurion University of the Negev
2008
Microbes from the three domains of life, bacteria, archaea and eukarya, share need to sense respond changes in external internal concentrations protons. When proton concentration is high, acidic conditions prevail cells must appropriately ensure that macromolecules metabolic processes are sufficiently protected sustain life. While we have learned much recent decades about mechanisms microbes use cope with acid, including unique challenges presented by organic acids, there still be gained...
Hydrogen photo-production in green algae, catalyzed by the enzyme [FeFe]-hydrogenase (HydA), is considered a promising source of renewable clean energy. Yet, significant increase hydrogen production efficiency necessary for industrial scale-up. We have previously shown that major challenge to be resolved inferior competitiveness HydA with NADPH production, ferredoxin-NADP(+)-reductase (FNR). In this work, we explored vivo Fd-HydA, where electron donor ferredoxin (Fd) fused and expressed...
Photosynthetic coral reef structures extend from the shallow sundrenched waters to dimly lit, "twilight" mesophotic depths. For their resident endosymbiotic dinoflagellates, primarily genus Symbiodinium spp., this represents a photic environment that varies ~15 fold in intensity and also differs spectral composition. We examined photosynthesis scleractinian Stylophora pistillata (3 m) settings (65m) northern Red Sea. spp. corals originating consistently performed below photosynthetic...
Photosynthetic hydrogen production in the microalga Chlamydomonas reinhardtii is catalyzed by two [FeFe]-hydrogenase isoforms, HydA1 and HydA2, both irreversibly inactivated upon a few seconds exposure to atmospheric oxygen. Until recently, it was thought that hydrogenase not active air-grown microalgal cells. In contrast, we show entire pool of cellular remains cells due efficient scavenging Using membrane inlet mass spectrometry, 18O2 isotope, various inhibitors, were able dissect oxygen...
Solar Induced Fluorescence (SIF) emitted from the photosynthetic apparatus is related indirectly to biomass production. In this study, a non-imager point spectroradiometer was mounted on UAV (Unmanned Aerial Vehicle) system (SIF-UAV), and retrieved SIF at high spatial resolution, which fitted for precision agriculture applications. Spatial variation of tracked along season over commercial avocado (P. americana Mill.) orchard. The signals were Krieg-interpolated create continuous layer that...
Abstract Nonphotochemical quenching (NPQ) mechanisms are crucial for protecting photosynthesis from photoinhibition in plants, algae, and cyanobacteria, their modulation is a long-standing goal improving crop yields. The current work demonstrates that Chlorella ohadii, green microalga thrives the desert under high light intensities fatal to many photosynthetic organisms does not perform nor require NPQ protect constant light. Instead of dissipating excess energy, it minimizes its uptake by...
Plants transpire water through their tissues in order to move nutrients and the cells. Transpiration includes various mechanisms, primarily stomata movement, which controls rate of CO2 vapor exchange between atmosphere. Assessment stomatal conductance is available for gas techniques at leaf level, yet these are not scalable whole plant let alone a large vegetation area. Hyperspectral reflectance spectroscopy, acquires hundreds bands single scan, may capture glimpse crop’s physiological...
Doxorubicin (DOX) is a widely used chemotherapeutic drug for human hepatocellular carcinoma (HCC). A major limitation to its effectiveness the development of multidrug resistance cancer cells. In clinical trials, patients with advanced HCC were treated high-dose acetaminophen (HAAP) in an effort improve antitumor activity chemotherapeutics. this study, we investigated effect concomitant treatment DOX and HAAP on hepatoma-derived HepG2 Viability, cell cycle distribution, ultrastructure...
Synechocystis sp. PCC6803 actively uptake inorganic carbon to elevate the dioxide concentration around their Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) enzyme. The mechanism is comprised of a set enzymatic complexes which act in an orchestrated manner transfer extracellular dissolved into cell and concentrate it within specialized compartment. NADPH dehydrogenase-1 first operational super-complex light conditions and, therefore, allows direct estimation flux cell, albeit...
Chemical thinning of apple fruitlets is an important practice as it reduces the natural fruit load and, therefore, increases size final for commercial markets. In apples, one chemical thinner used Metamitron, which sold product Brevis® (Adama, Ashdod, Israel). This inhibits electron transfer between Photosystem II and Quinone-b within light reactions photosynthesis. this study, we investigated responses two cultivars—Golden Delicious Top Red—and photosynthetic after administration Brevis®....
Photosynthesis performance can be assessed quantitatively with light response curves. These curves record the Electron Transport Rate (ETR) as a function of intensity. Then, statistical fit on these parameterize use efficiency, maximum photosynthetic activity and reaction apparatus to stress. While this technique is performed portable fluorometers in field conditions, it difficult scale canopy level. The Fraunhofer line discrimination technique, which detects fluorescence signals emitted...
Abstract A major drawback of avocado ( Persea americana Mill.) is susceptibility to frosts, which reduces yields and limits its geographic distribution market growth. Whereas the frost-susceptible cultivar ‘Hass’ leads global market, cv. ‘Ettinger’, although commercially less important, considered frost-tolerant. The mechanism behind greater frost tolerance ‘Ettinger’ has not yet been elucidated; therefore, aim current study was evaluate differences between responses two cultivars. results...
Avocado is a commercially important fruit tree which sold worldwide. Originating in subtropical regions of the South America, this species now grown worldwide and sometimes exposed to cold temperatures. Specifically, frost stress harms crop yield its quality. While it known general that photosynthetic apparatus changes response conditions, there still not much information regarding sporadic stress. In study, we tracked apparatus’ light reaction ‘Hass’ ‘Ettinger’ avocado cultivars stress,...
We present work of our COST Action on "Understanding and exploiting the impacts low pH micro-organisms". First, we summarise a workshop held at European Federation Biotechnology meeting Microbial Stress Responses (online in 2020) "Industrial applications stress microbial bio-based production", as an example initiative fostering links between pure applied research. report outcomes small survey challenging topic developing researchers working academia industry that show that, while people...
Abstract Non-photochemical quenching (NPQ) mechanisms are crucial for protecting photosynthesis from photoinhibition in plants, algae, and cyanobacteria, their modulation is a long-standing goal improving crop yields. The current work demonstrates that Chlorella ohadii , green micro-alga thrives the desert under high light intensities which fatal to many photosynthetic organisms, does not perform nor require NPQ protect constant light. Instead of dissipating excess energy, it minimizes its...
Abstract In phytoplankton, the intricate balance between respiration and photosynthesis is co-regulated to ensure efficient energy management adaptation varying environmental conditions. cyanobacteria, both processes occur on same membrane, sharing electron transport carriers within cellular compartment. By studying interaction respiration, we can better understand how cyanobacteria their energetic budget for survival. this study, present an integrated approach that combines tracking gas...
Chlorophyll fluorescence can be remotely sensed in open fields via the Fraunhofer atmospheric absorption lines of oxygen and is termed Solar-Induced Fluorescence (SIF). SIF has been extensively related to carbon assimilation at global ecology scale was interpreted as electron transport rate. However, shown unrelated directly finer-scale resolution may other photosynthetic processes, such non-photochemical quenching. This raises question how exactly relates actual activity. Based on a...
High-throughput measurements of photosynthesis plants grown under various conditions may provide important insights into the plasticity photosynthetic performance plants. Remote sensing activity [i.e., solar-induced chlorophyll fluorescence (SIF)] and its derivatives are next generation remote techniques, enabling high-throughput field conditions. We hypothesized that by measuring SIF simultaneously with whole-plant water relations in a standardized controlled drought experiment, we would be...
Abstract Solar Induced Fluorescence (SIF) emitted from the photosynthetic apparatus is related indirectly to biomass production. It can be remotely sensed airborne platforms, yet, spatial resolution satellites, for example, too low commercial agricultural uses. We used a non-imager point spectroradiometer mounted on SIF-UAV (Unmanned Aerial Vehicle) system, and retrieved SIF at high resolution, which fitted precision agriculture applications. In this study, we tracked variation of along...
High-throughput measurements of photosynthesis across various cultivars/genomes and environmental conditions are crucial for understanding plant photosynthetic adaptability. Advanced remote sensing techniques, such as solar-induced chlorophyll fluorescence (SIF), facilitate field-based, high-throughput assessments. Our research explored whether combining SIF with whole-plant water relation data during standardized drought experiments could effectively quantify activity early-stage stress...