A study of calcium homeostasis in the plant Arabidopsis reveals two signalling pathways it uses to balance the objectives of growth and immunity by regulating the level of …
There is a class of elements that promote plant growth at suitable concentrations, but are not necessary for plant growth, such as Si, Na, Co, and Se (Pilon-Smits et al., 2009; Vatansever et al., 2017). Studying the growth regulation of beneficial elements in plants can not only improve plant yield and quality but also increase human intake of ...
Plant-based complementary foods often contain high levels of phytate, a potent inhibitor of iron, zinc, and calcium absorption. This review summarizes the concentrations of phytate (as hexa- and penta-inositol phosphate), iron, zinc, and calcium and the corresponding phytate:mineral molar ratios in 26 indigenous and 27 commercially processed plant-based complementary …
The free calcium ion is now recognized as a major intracellular regulator of numerous biochemical and physiological processes in plants. Over the last six or seven years a large body of evidence has been accumulated which allows us to propose a working hypothesis for the mode of action of calcium-dependent mechanisms.
Free calcium ions stimulate a huge variety of processes inside the cell 1, eliciting specific responses that depend on their spatio-temporal concentrations 2,3.Here we investigate how these ...
Calcium ions (Ca 2+) regulate plant growth and development during exposure to multiple biotic and abiotic stresses as the second signaling messenger in cells.The extracellular calcium-sensing receptor (CAS) is a specific protein spatially located on the thylakoid membrane. It regulates the intracellular Ca 2+ responses by sensing changes in extracellular Ca 2+ …
Precise measurements of dynamic changes in free Ca 2+ concentration in the lumen of the plant endoplasmic reticulum (ER) have been lacking so far, despite increasing evidence for the contribution of this intracellular compartment to Ca 2+ homeostasis and signalling in the plant cell. In the present study, we targeted an aequorin chimera with reduced Ca 2+ affinity to the …
The calcium ion (Ca2+) is a universal signal in all eukaryotic cells. A fundamental question is how Ca2+, a simple cation, encodes complex information with high specificity. Extensive research has ...
Calcium (Ca) is an essential macronutrient for plants and animals where it plays indispensable structural and signalling roles. Soluble calcium ions (Ca 2+) are extracted from the soil solution by plants to form the primary source of Ca in the food chain.In recent years, our understanding of the signalling role of Ca 2+ in organisms has developed significantly (e.g. …
Calcium (Ca) is an essential nutrient that plays important role in various growth and developmental processes in plant. Plants absorb Ca through roots and deliver it to shoot through the xylem stream. Both physiological and molecular mechanisms are involved in the uptake and transport of Ca that affect the distribution and accumulation of Ca in plant tissues. Cation …
A high sodium concentration results in abiotic stress, which is toxic to plants. Calcium protects the plants against salt tolerance imposed by sodic soils. Calcium maintains the structural and functional integrity of cell membranes and cell walls, regulates ion transport, selectivity, and ion-exchange behavior under salt stress conditions.
Calcium concentration in plant tissues varies depending on factors, such as the growing conditions (soil, pH, and climatic factors), plant organ, age of the plant, or species. 4 The relative distribution of total Ca is approximately 70%–90% in the leaves and 10%–30% in the root. 5 Calcium levels in low-transpiring organs, such as fruits and ...
As a crucial element for plants, calcium (Ca) is involved in photosynthesis and nutrient absorption, and affects the growth of plants. Poplar is an important economic forest and shelter forest species in China. However, the optimum calcium concentration for …
Calcium is an essential plant nutrient. It is required for various structural roles in the cell wall and membranes, it is a counter-cation for inorganic and organic anions in the vacuole, and the cytosolic Ca2+ concentration ([Ca2+]cyt) is an obligate intracellular messenger coordinating responses to numerous developmental cues and environmental challenges.
Calcium is an essential plant nutrient. It is required for various structural roles in the cell wall and membranes, it is a counter-cation for inorganic and organic anions in the vacuole, and the ...
Calcium is considered a key player in enhancing stress tolerance in plants. Whether applied independently or in conjunction with exogenous plant hormones like salicylic …
This review provides a comprehensive overview of Ca2+ signaling in plant mineral uptake and detoxification. The role of Ca2+ as a second messenger in response to extracellular stimuli and the distinct Ca2+ signatures induced by different stresses are highlighted. The review also offers insights into future investigations of plant ion homeostasis.
Solution calcium concentrations required for the growth of a range of plant species, including both monocotyledons and dicotyledons, were determined in two experiments in which plants were grown in flowing solution culture at constantly maintained calcium concentrations ranging from 0.5 to 3000 μM. Calcium chloride was used as the calcium source in the first …
In sunflower seedlings roots, calcium concentration in the cell wall region is significantly reduced by NaCl salinity (40 mM NaCl). Sodium ions possibly inhibit the radial movement of calcium from external solution to xylem elements in roots. ... Reid RJ, Smith FA (2000) The limits of sodium/calcium interactions in plant growth. Funct Plant ...
David L. Jones, Leon V. Kochian, Simon Gilroy, Aluminum Induces a Decrease in Cytosolic Calcium Concentration in BY-2 Tobacco Cell Cultures, Plant Physiology, Volume 116, Issue 1, January 1998, ... Effects of auxin and abscisic acid on cytosolic calcium and pH in plant cells. Proc Natl Acad Sci USA. 84. 1990. 9645.
Elevation in calcium concentration in plant cells is an essential early event during plant defense responses. Alterations in the Ca(2+) concentration are sensed by Ca(2+)-binding proteins, including calmodulin, calcium-dependent protein kinases and calcineurin B-like proteins, which relay or decode the encoded Ca(2+) signals into specific ...
Calcium (Ca2+) is a second messenger in plants growth and development, as well as in stress responses. The transient elevation in cytosolic Ca2+ concentration have been reported to be involved in plants response to abiotic and biotic stresses. In plants, Ca2+-induced transcriptional changes trigger molecular mechanisms by which plants adapt and respond to environment …
Calcium ions (Ca 2+) serve as ubiquitous signaling molecules and are involved in diverse biological processes, particularly pivotal in plant growth and stress response.When plants sense environmental changes, an initial response involves an intracellular shift in free Ca 2+ levels, with the spatiotemporal characteristics influenced by the nature, intensity, and …
Calcium ions (Ca 2+) are indispensable mineral nutrients for plants, while also serving as ubiquitous intracellular signaling molecules that play pivotal roles in regulating plant …
The resting concentration of free cytosolic calcium [Ca 2+] cyt is usually retained at a sub-micro molar level between 50 and 100 nM (Fig. 2) to prevent its toxic effect on cellular energy metabolism [3].A wide range of biotic and abiotic stresses as well as several developmental processes evoke increases in the level of [Ca 2+] cyt by a controlled entry of …
Cadmium in minerals replaces calcium (Ca), due to having identical charge and similar ionic radius and chemical behavior (Kubier et al., 2019). ... and plants may show these toxic symptoms when the Cd concentration in plant tissue exceeds 3–30 mg …
As a whole, the drought tolerance of zoysiagrass was improved to some extent by the application of a moderate calcium concentration. ... (2007), who reported that addition of CaCl 2 to drought stressed plants lowered the proline concentration by increasing the level of proline degrading enzyme and decreasing the proline synthesizing enzyme.
EARLY STUDIES ON PLANT CALCIUM. Ca 2+ is an essential element; however, its role is elusive. When examining total Ca 2+ in plants, the concentration is quite large (mM), but its …
Photosynthetic Characteristics of Poplar Seedlings. In general, the indicators of photosynthetic characteristics first showed an increasing trend and then a decreasing trend with increasing calcium concentration ().With the increasing gradient of calcium addition, the best value for all photosynthetic indicators occurred in the treatments with 5 mmol·L −1 calcium, and there …
Non-ratiometric dyes such as fluo, rhod and Calcium Green-1 are used for measuring [Ca 2+] cyt in plants, among them Calcium Green-11 is well-known and most commonly used in plant systems. The single excitation spectrum allows for simple instrumentation. A simple formula is used to calculate the absolute Ca 2+ concentration in …
Abstract. Calcium (Ca) is a unique macronutrient with diverse but fundamental physiological roles in plant structure and signalling. In the majority of crops the largest proportion of long-distance calcium ion (Ca 2+) transport through plant tissues has been demonstrated to follow apoplastic pathways, although this paradigm is being increasingly challenged.
Therefore, the emission intensity (510 nM) of fluorescence light is directly proportional with respect to the free calcium ion concentration. Fura-2 can be used to measure free calcium ions in plant suspension cell culture or …
This review provides new insight that calcium plays important roles in plant growth, heavy metal accumulation and translocation, photosynthesis, oxidative damage and signal transduction under cadmium stress. ... Cadmium (Cd), bein … Effects of calcium at toxic concentrations of cadmium in plants Planta. 2017 May;245(5):863-873. doi: 10.1007 ...
