A5028445247- Plant Water Relations and Carbon Dynamics
- Tree-ring climate responses
- Plant responses to elevated CO2
- Forest ecology and management
- Hydrology and Watershed Management Studies
- Horticultural and Viticultural Research
- Plant responses to water stress
- Plant biochemistry and biosynthesis
- Plant Surface Properties and Treatments
- Nuts composition and effects
- Irrigation Practices and Water Management
- Fern and Epiphyte Biology
- Remote Sensing in Agriculture
Weizmann Institute of Science
2018-2023
Hebrew University of Jerusalem
2020
Agricultural Research Organization
2018
Land surface models (LSMs) typically use empirical functions to represent vegetation responses soil drought. These largely neglect recent advances in plant ecophysiology that link xylem hydraulic functioning with stomatal climate. We developed an analytical optimization model based on hydraulics (SOX) predict Coupling SOX the Joint UK Environment Simulator (JULES) LSM, we conducted a global evaluation of against leaf- and ecosystem-level observations. simulates leaf conductance climate for...
Cavitation resistance has often been viewed as a relatively static trait, especially for stems of forest trees. Meanwhile, other hydraulic traits, such turgor loss point (Ψtlp ) and xylem anatomy, change during the season. In this study, we hypothesized that cavitation is also dynamic, changing in coordination with Ψtlp . We began comparison optical vulnerability (OV), microcomputed tomography (µCT) cavitron methods. All three methods significantly differed slope curve,Ψ12 Ψ88 , but not Ψ50...
Abstract It has been assumed that mixing of species with high physiological diversity reduces competition over water and light resources, compared to single‐species forests. Although several mechanisms explain this observation have proposed, quantification these effects is lacking. Here we studied water‐use dynamics for five tree in a mature, mixed, evergreen, Mediterranean forest. We use empirical measurements key structural attributes including root distribution, through DNA barcoding soil...
Lycophytes are the earliest diverging extant lineage of vascular plants, sister to all other plants. Given that most species adapted ever-wet environments, it has been hypothesized lycophytes, and by extension common ancestor have few adaptations drought. We investigated responses drought key fitness-related traits such as stomatal regulation, shoot hydraulic conductance (Kshoot ) stem xylem embolism resistance in Selaginella haematodes S. pulcherrima, both native tropical understory. During...
Abstract. Drought stress causes multiple feedback responses in plants. These span from stomata closure and enzymatic downregulation of photosynthetic activity to structural adjustments xylem biomass leaf area. Some these processes are not easily reversible may persist long after the has ended. Despite a multitude hydraulic model approaches, simulation models still widely lack an integrative mechanistic description how this sequence physiological tree be realized that is also simple enough...
Trees of the genus Prunus produce some most widely consumed fruits globally. The combination climate change-related warming and increased drought stress, scarcity freshwater resources for irrigation, increasing demands due to population growth creates a need tolerance in these tree species. Recently, we have shown field that native wild pear species performs better under than two cultivated Here, comparative study was conducted Israel investigate traits associated with almond (cultivated...
Recent findings suggest that trees can survive high levels of drought-induced xylem embolism. In many cases, the embolism is irreversible and, therefore, potentially affect post-drought recovery and tree function under recurring droughts. We examined development in potted Aleppo pines, a common species hot, dry Mediterranean habitats. asked (1) how affected by different (2) what consequences this damage has drought scenario. Young were dehydrated to target water potential (Ψx ) values -3.5,...
The Fourth Xylem International Meeting (XIM4) brought together over 100 plant scientists to discuss a wide range of topics related embolism resistance and efficiency long-distance water transport through plants, their implications for cultivated natural systems. diversity methods, species, physiological processes discussed in the context stress at meeting highlighted need integrate spatial temporal data about functioning, specifically regard climate-change-related challenges. Structural...
Abstract. Drought stress is imposing multiple feedback responses in plants. These span from stomata closure and enzymatic downregulation of photosynthetic activity to structural adjustments leaf area. Some these processes are not easily reversible may persist long after the ended. Unfortunately, simulation models widely lack an integrative mechanistic description on how this sequence tree physiological occur. Here, we suggest approach simulate drought responses. Firstly, a decreasing plant...
Xylem embolism impairs hydraulic conductivity in trees and drives drought-induced mortality. Research shows that can endure high levels of embolism, but quantifying the amount which kills a tree is difficult. Specifically, re-sprouting woody species, pose challenge, since even determining mortality not straight forward. This calls for long-term monitoring post-drought recovery, raises question – while prevail with how their recovery affected?   To answer these questions,...
Abstract Xylem embolism is a major threat to tree function and survival under drought, in natural agricultural settings alike, with its impact increasing light of global climate change. Conversely, potassium (K + ) has been shown increase xylem conductivity s trees, carbohydrates were reported leaf gas exchange. In this study we examined the effects K on two divergent evergreen species that are regularly exposed drought: pine ( Pinus brutia lemon Citrus × limon ). Five-year-old trees...
Abstract Aims In plant eco-physiology, less negative (enriched) carbon 13 (13C) in the leaves indicates conditions of reducing leaf gas exchange through stomata, e.g. under drought. addition, 13C is expected to be non-photosynthetic tissues as compared with leaves. However, these relationships δ from (photosynthetic organs) branches, stems and roots (non-photosynthetic are rarely tested across multiple closely related tree species, compartments, or trees growing extreme heat Methods We...
<p>It has been assumed that mixing of species with high physiological diversity reduces competition over water and light resources, compared to single-species forests. Although several mechanisms explain this observation have proposed, empiric evidence is lacking. Here we studied water-use dynamics at a monthly resolution for two years in five key tree mature, mixed, evergreen, Mediterranean forest. Root distribution was measured DNA barcoding soil cores. Measurements the...