Water Stress

doi:10.5772/1419

Cited by 28 publications

(5 citation statements)

References 174 publications

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“…Similarly, the hydric potential was also recovered (-0.5 MPa), indicating that the leaflets mesophyll may not be affected during this period of stress. According to Larcher (2010) and Rahman and Hasegawa (2012), reduction in photosynthesis rates is common in sensitive species, which is initially mediated by stomatal closing, and later by a reduction in photosynthetic capacity, what was reported by Rocha and Moraes (1997) with S. adstringens species, which maintained the photosynthesis rates between 8 µmol m -2 s -1 and 11.6 µmol m -2 s -1 until day 25 of water stress. Then, these values dropped on day 27 (3.8 µmol m -2 s -1 ) until reaching zero on day 30 with total recovery occurring after 48 hours of irrigation.…”

Section: Photosynthesis Ratesmentioning

confidence: 99%

“…Souza et al (2010) studied four species under drought, and did not observe lower photosynthesis rates in all species studied, except for B. guianensis. Cornic (2000) and Rahman and Hasegawa (2012) wrote that hydric restriction normally causes in parallel a decrease in photosynthesis and conductance rates; this occurs due to the absorption capacity of the mesophyll (conductance) that changes in leaves submitted to drought due to stomatal closing.…”

Section: Photosynthesis Ratesmentioning

confidence: 99%

“…According to Martinez et al (2007) and Rahman and Hasegawa (2012), the stomatal closure causes a decrease in the partial CO 2 pressure, limiting transpiration, an important mechanism to prevent water loss under stress conditions in addition to limiting the chloroplast CO 2 fixation capacity.…”

Section: Introductionmentioning

confidence: 99%

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Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress

Oliveira¹,

Gualtieri²

2017

Biosci. J.

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ABSTRACT:The paratudo, Tabebuia aurea, is a common Brazilian tree from the Pantanal wetland from Miranda, Mato Grosso do Sul, an area with hydric seasonality. To evaluate the effects of water stress on CO 2 exchange, ten-month-old T. aurea seedlings cultivated in planting bags were subjected to water stress by suppressing irrigation for 23 days. Stomatal conductance, transpiration rate, and photosynthetic rate were measured during the stress and recovery period, totaling 28 days, using an infrared portable analyzer. After 23 days without irrigation, the transpiration, stomatal conductance, and net photosynthesis rates in leaflets were zero, while the leaflets water potential reached -2.6 MPa. After this point, daily irrigation was resumed, and the values of the measured variables recovered to the initial levels after 96 hours (transpiration rate from 2.0 to 2.6 mmol m -2 s -1 ; stomatal conductance rate from 0.12 to 0.18 mol m -2 s -1 and photosynthesis rate from 8.1 to 9.5 µmol m -2 s -1 ). Furthermore, the hydric potential values were similar to those observed at the beginning of the experiment (-0.5 MPa). The results showed that T. aurea has tolerance to drought, allowing their survival in areas subjected to periodic water stress.

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Section: Photosynthesis Ratesmentioning

confidence: 99%

Section: Photosynthesis Ratesmentioning

confidence: 99%

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Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress

Oliveira¹,

Gualtieri²

2017

Biosci. J.

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“…Lipids are one of the main components of the cell membrane and are vulnerable to water loss (Ishaku et al, 2020). Drought results in a water deficit, which can alter the cellular water equilibrium and lead to a series of morphological, physiological, biochemical, and molecular changes in organisms (Mofizur Rahman & Hasegawa, 2012). Desiccation can also induce the accumulation of reactive oxygen species (ROS) in algal cells (Scheibe & Beck, 2011); excessive ROS production causes oxidative stress, which in turn influences the lipids, proteins, and nucleic acids of cells (Rezayian et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Responses of the desert green algae, Chlorella sp. to drought stress

Wang,

Li,

Wang

2023

Journal of Phycology

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Desert algae are important components of the desert soil crust and play an essential role in desert soil ecosystem development. Owing to their special habitat, desert algae are often exposed to harsh environments, among which drought represents the most common stress. Green algae are considered to have drought tolerance potential; however, only a few studies have investigated this. In this study, we selected the green alga Chlorella sp., which was isolated from desert soil, and studied its physiological response to polyethylene glycol (PEG) 6000‐induced drought stress. The results showed that drought stress can affect the photosynthetic efficiency of Chlorella sp., reduce its water retention ability, and destroy its ultrastructure. However, Chlorella sp. can cope with drought stress through a series of physiological regulatory strategies. Protective strategies include quick recovery of photosynthetic efficiency and increased chlorophyll content. In addition, induced synthesis of soluble proteins, lipids, and extracellular polysaccharide (EPS), and accumulation of osmotic regulatory substances, such as sucrose and trehalose, also contribute to improving drought tolerance in Chlorella sp. This study provides insights into the physiological responses of Chlorella sp. to drought stress, which may be valuable for understanding the underlying drought adaptation mechanisms of desert green algae.

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“…Therefore, many problems will occur when plants suffer from water stress, such as harmful plant-water interactions that occur under such a situation. Thus, the early detection of water stress is important because water stress is the most critical abiotic stressor limiting plant growth, crop yields and food production quality (Tezara 1999, Siddique 2000, Lisar 2012, Leng et al 2014.…”

Section: Introductionmentioning

confidence: 99%

Temperature/emissivity separation using hyperspectral thermal infrared imagery and its potential for detecting the water content of plants

Huo

Xing

2018

International Journal of Remote Sensing

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Thermal infrared (TIR) remote sensing is among the most effective tools for retrieving land surface temperatures (LSTs) at different scales using remotely sensed data with different spatial resolutions. Significant advancements have recently been made in TIR sensor technology, and hyperspectral TIR images now provide an opportunity to separate temperatures and emissivities with high accuracy. In this study, an experiment is performed to retrieve temperatures and emissivities based on a hyperspectral TIR spectrometer, the HyperCam-LW (Long Wave), and show the potential of this instrument in detecting the water content variations, water deficiencies and health of plants. In this study, a temperature emissivity separation (TES) method based on spectral smoothness is used to retrieve the temperature and emissivity of wheat plants from hyperspectral TIR data. Based on the retrieved temperatures and emissivities, the variations in the emissivity from different wheat plants are observed, and the relationship between the emissivity dynamics and water content is analysed. A comparison of the temperature of different plants was performed, and the results clearly showed the canopy structure of the plants.Subsequently, the health of the wheat was analysed, and the results showed that for water-deficit plants, the emissivity increased in a consistent manner over all spectral bands while the spectral shape remained almost unchanged because the spectral emissivity is sensitive to water content variations in plants. In this paper, the results also demonstrated that it is possible and perhaps reasonable to attribute the overall increase in the emissivity of plants with water deficits to cavity effects resulting from biochemical and structural changes in the leaves caused by water deficits.

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Water Stress

Cited by 28 publications

References 174 publications

Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress

Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress

Responses of the desert green algae, Chlorella sp. to drought stress

Temperature/emissivity separation using hyperspectral thermal infrared imagery and its potential for detecting the water content of plants

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