Effect of salinity on osmotic adjustment, proline accumulation and possible role of ornithine-δ-aminotransferase in proline biosynthesis in Cakile maritima

Physiology and Molecular Biology of Plants, Journal Year: 2018, Volume and Issue: 24(6), P. 1017 - 1033

Published: Sept. 28, 2018

Language: Английский

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Groundwater enhances above‐ground growth in mangroves

Journal of Ecology, Journal Year: 2018, Volume and Issue: 107(3), P. 1120 - 1128

Published: Nov. 15, 2018

Abstract Groundwater flow through coastal wetlands plays an important role in the maintenance of productivity intertidal ecosystems. can reduce salinity and increase nutrient availability which enhance plant growth alter biomass allocation patterns. Here, we used stable isotopes oxygen hydrogen to assess how groundwater influences below‐ground above‐ground widespread mangrove species Avicennia marina . We found source water within tree stems varied seasonally, with non‐saline use higher wet season when rainwater was highest compared dry season. Stems proportional contribution had increased but no effect on growth. Below‐ground however influenced by across zone high‐ low‐intertidal zone. Synthesis This study shows that mangroves available rather than saline sources. flows into stimulates organic matter accumulation suggesting sources, such as rainfall, are for forests.

Language: Английский

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Hydraulic redistribution of foliar absorbed water causes turgor‐driven growth in mangrove seedlings

Plant Cell & Environment, Journal Year: 2019, Volume and Issue: 42(8), P. 2437 - 2447

Published: April 6, 2019

Although foliar water uptake (FWU) has been shown in mature Avicennia marina trees, the importance for its seedlings remains largely unknown. A series of experiments were therefore performed using artificial rainfall events a greenhouse environment to assess ecological implications FWU A. seedlings. One-hour resulted an increased leaf potential, reversed sap flow, and rapid diameter increment signifying turgor-driven growth up 30.1 ± 5.4 μm. Furthermore, application event with deuterated showed that amount absorbed by leaves transported stem was directly univocally correlated observed spurts. The observations this process-based study show is important acquisition mechanism under certain circumstances might be establishment Distribution mangrove trees hence more significantly disturbed climate change-driven changes patterns than previously assumed.

Language: Английский

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Global patterns of tree stem growth and stand aboveground wood production in mangrove forests

Forest Ecology and Management, Journal Year: 2019, Volume and Issue: 444, P. 382 - 392

Published: May 8, 2019

Language: Английский

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Harvesting water from unsaturated atmospheres: deliquescence of salt secreted onto leaf surfaces drives reverse sap flow in a dominant arid climate mangrove, Avicennia marina

New Phytologist, Journal Year: 2021, Volume and Issue: 231(4), P. 1401 - 1414

Published: May 13, 2021

Summary The mangrove Avicennia marina adjusts internal salt concentrations by foliar secretion. Deliquescence of accumulated causes leaf wetting that may provide a water source for salt‐secreting plants in arid coastal wetlands where high nocturnal humidity can usually support deliquescence whereas rainfall events are rare. We tested the hypotheses on surfaces drive top‐down rehydration, and such absorption moisture from unsaturated atmospheres makes functional contribution to dry season shoot balances. Sap flow relations were monitored assess uptake atmospheric branches during under natural manipulated microclimatic conditions. Reverse sap rates increased with increasing relative 70% 89%, consistent function harvesting atmospheres. Top‐down rehydration elevated branch potentials above those possible root uptake, subsidising transpiration reducing vulnerability hydraulic failure subsequent photoperiod. Absorption harvested through enhances balances growing hypersaline climatic these frequent, low intensity contributes prevention carbon starvation drought.

Language: Английский

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Salinity tolerance mechanisms and their breeding implications

Journal of Genetic Engineering and Biotechnology, Journal Year: 2021, Volume and Issue: 19(1), P. 173 - 173

Published: Nov. 9, 2021

The era of first green revolution brought about by the application chemical fertilizers surely led to explosion food grains, but left behind notable problem salinity. Continuous these coupled with fertilizer-responsive crops make country self-reliant, continuous deposition altered water potential and thus negatively affecting proper plant functioning from germination seed setting.

Language: Английский

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A critical review on adaptations, and biological activities of the mangroves

Journal of Natural Pesticide Research, Journal Year: 2022, Volume and Issue: 1, P. 100006 - 100006

Published: June 1, 2022

Mangroves are the species of plants that live along shores, rivers, and estuaries in tropical subtropical regions with distinct tangled roots arising from mud. Nowadays, they considered a very valuable ecosystem by scientists coastal dwellers which was once neglected. remarkably contribute to environmental maintenance providing various services livelihood individuals dependent on these wonders nature. Under severe salinity stress, tend grow, flower, provide support environment. By encompassing physiological adaptations mangroves exhibit wide range survival methods, have well-developed mechanism for salt exclusion, ion-regulation, photosynthesis, nutrient uptake. True also display an efficient coping leaf size, growth, biomass yield, ion regulations, water relations exhibiting significant role maintenance. Some highly tolerant stress found better performance than less salt-tolerant ones. phytochemicals bioactive properties including pesticide activities most their parts can be utilized. Comparing certain biological exhibited true against gives accountable information, thereby paving strong foundation future works "Green Lungs" planet.

Language: Английский

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Proteomic analysis on mangrove plant Avicennia marina leaves reveals nitric oxide enhances the salt tolerance by up-regulating photosynthetic and energy metabolic protein expression

Tree Physiology, Journal Year: 2018, Volume and Issue: unknown

Published: May 1, 2018

Avicennia marina (Forsk.) Vierh is one of the most salt-tolerant mangrove species. Our previous study revealed that nitric oxide (NO) enhanced salt tolerance A. by promoting secretion and Na+ sequestration under stress. However, little known about regulation NO on proteomic profiling for this In study, we used sodium nitroprusside (SNP), an donor, to investigate regulatory mechanism according physiological aspects. Photosynthesis data showed reduction in photosynthesis caused high salinity treatment (400 mM NaCl) could be partially recovered addition SNP (100 μM). Further analysis induce not only stomatal limitation but also non-stomatal photosynthetic reduction, while restore limitation, implying application was beneficial metabolic process leaves. Proteomic identified 49 differentially expressed proteins involved various biological processes such as photosynthesis, energy metabolism, primary RNA transcription, protein translation stress response proteins. Under treatment, abundances related ribulose-phosphate 3-epimerase (RPE, spot 3), RuBisCO large subunit (RBCL, 4, 5, 24), activase A (RCA, 17, 18) quinine oxidoreductase-like isoform 1 (QOR1, 23), were significantly decreased. abundance RBCL (spot 9) QOR1 23) increased addition. addition, exogenous supply alleviated increasing accumulation some metabolism 15), 25, 45, 46), transcription 36) 12, 21, 26, 37, 43). The transcriptional levels nine selected mostly consistent with their except 46. Overall, presented demonstrated has a positive effect improving regulating response.

Language: Английский

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Shifting access to pools of shoot water sustains gas exchange and increases stem hydraulic safety during seasonal atmospheric drought

Plant Cell & Environment, Journal Year: 2021, Volume and Issue: 44(9), P. 2898 - 2911

Published: May 11, 2021

Understanding how plants acclimate to drought is crucial for predicting future vulnerability, yet seasonal acclimation of traits that improve tolerance in trees remains poorly resolved. We hypothesized dry season leaf and stem influencing shoot water storage hydraulic capacitance would mitigate the drought-associated risks reduced gas exchange failure mangrove Sonneratia alba. By late season, availability stored had shifted within leaves between stems. While whole remained stable, symplastic fraction increased 86%, 104% declined 80%. Despite declining plant potentials, conductance unchanged, midday assimilation rates increased. Further, available minimum potential observed corresponding 50% loss 111%. Shifting pools water, organs, maintained buffer periods photosynthesis losses conductivity, mitigating carbon depletion during atmospheric drought. Seasonal changes access tissue organ may have an important role avoidance.

Language: Английский

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Mangroves provide blue carbon ecological value at a low freshwater cost

Scientific Reports, Journal Year: 2022, Volume and Issue: 12(1)

Published: Oct. 21, 2022

Abstract “Blue carbon” wetland vegetation has a limited freshwater requirement. One type, mangroves, utilizes less during transpiration than adjacent terrestrial ecoregions, equating to only 43% (average) 57% (potential) of evapotranspiration ( $$ET$$ ET ). Here, we demonstrate that comparative consumptive water use by mangrove is as much 2905 kL H 2 O ha −1 year ecoregions with $${E}_{c}$$ E c -to- ratios 47–70%. Lower porewater salinity would, however, increase affecting leaf-, tree-, and stand-level eco-physiological controls on transpiration. Restricted also additive other ecosystem services provided such high carbon sequestration, coastal protection support biodiversity within estuarine marine environments. Low demand enables mangroves sustain ecological values connected ecosystems future reductions in while not competing the needs humans. Conservative may be characteristic emergent blue wetlands.

Language: Английский

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