Drought and Its Consequences to Plants – From Individual to Ecosystem

Silva, Elizamar Ciríaco da; Albuquerque, Manoel Bandeira de; Neto, André Dias de Azevedo; Silva, Carlos Dias da

doi:10.5772/53833

Cited by 80 publications

(100 citation statements)

References 99 publications

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“…The accumulation of osmoregulators in response to drought is an important mechanism for maintaining cell turgor, contributing to alleviate the reduction of the water potential. Previous studies have observed an increase in solutes in sugarcane and other species under water-deficient conditions (Ashraf and Foolad 2007, Cha-um e Kirdmanee 2009, Silva et al 2009, Silva et al 2013. Nevertheless, only solute accumulation does not favour the tolerance to drought per se, but the pathway that leads to the mechanism of drought tolerance is strongly influenced by this factor (Hasegawa et al 2000, Medeiros et al 2012.…”

Section: Discussionmentioning

confidence: 97%

“…According to Ashraf and Foolad (2007), the accumulation of proline is the first response of plants exposed to water stress in order to reduce injuries to the cells. The important role of proline to drought tolerance assisting in osmotic adjustment (Kavi Kishor et al 2005), stabilizing the membrane and eliminating oxygen radicals, and preventing damage to cell structures caused by environmental stresses is a matter of study (Ashraf and Foolad 2007;Silva et al 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Even in humid regions, an inequality in the rainfall distribution causes limitations on plant growth (Silva et al 2013). Irrigation has been used to reduce the impact, making it possible for many crops to successfully grow.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Physiological limitations in two sugarcane varieties under water suppression and after recovering

Medeiros¹,

Silva²,

Nogueira³

et al. 2013

Theor. Exp. Plant Physiol.

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Increasing water scarcity and depleted water productivity in irrigated soils are inducing farmers to adopt improved varieties, such as those with high-capacity tolerance. The use of tolerant varieties of sugarcane might substantially avoid the decline of productivity under water deficit. This research aimed to evaluate the harmful effects of drought on the physiology of two sugarcane varieties (RB867515 and RB962962) during the initial development. Young plants were subjected to irrigation suspension until total stomata closure, and then rewatered. Significant reduction on stomatal conductance, transpiration, and net photosynthesis were observed. RB867515 showed a faster stomatal closure while RB962962 slowed the effects of drought on the gas exchanges parameters with a faster recovering after rewatering. Accumulation of carbohydrates, amino acids, proline, and protein in the leaves and roots of the stressed plants occurred in both varieties, substantially linked to reduction of the leaf water potential. Due to the severity of stress, this accumulation was not enough to maintain the cell turgor pressure, so relative water content was diminished. Water stress affected the contents of chlorophyll (a, b, and total) in both varieties, but not the levels of carotenoids. There was a significant reduction in dry matter

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Physiological limitations in two sugarcane varieties under water suppression and after recovering

Medeiros¹,

Silva²,

Nogueira³

et al. 2013

Theor. Exp. Plant Physiol.

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show abstract

“…Drought can cause nutrient deficiencies, even in fertilized soil. The increased duration and intensity of drought are usually linked to decreasing N mineralization [105], mobility, and absorbance of inorganic nutrients [106,107]. Moreover, plant biomass, N concentration levels, and the amount of N in the whole plant increases by adding water after a short-term or medium-term drought, while they decrease after a long-term drought [108].…”

Section: N Depositionmentioning

confidence: 99%

Drought and Carbon Cycling of Grassland Ecosystems under Global Change: A Review

Lei

Pang

Xing-yong

et al. 2016

Water

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Abstract:In recent years, the increased intensity and duration of droughts have dramatically altered the structure and function of grassland ecosystems, which have been forced to adapt to this change in climate. Combinations of global change drivers such as elevated atmospheric CO 2 concentration, warming, nitrogen (N) deposition, grazing, and land-use change have influenced the impact that droughts have on grassland C cycling. This influence, to some extent, can modify the relationship between droughts and grassland carbon (C) cycling in the multi-factor world. Unfortunately, prior reviews have been primarily anecdotal from the 1930s to the 2010s. We investigated the current state of the study on the interactive impacts of multiple factors under drought scenarios in grassland C cycling and provided scientific advice for dealing with droughts and managing grassland C cycling in a multi-factor world. Currently, adequate information is not available on the interaction between droughts and global change drivers, which would advance our understanding of grassland C cycling responses. It was determined that future experiments and models should specifically test how droughts regulate grassland C cycling under global changes. Previous multi-factor experiments of current and future global change conditions have studied various drought scenarios poorly, including changes in precipitation frequency and amplitude, timing, and interactions with other global change drivers. Multi-factor experiments have contributed to quantifying these potential changes and have provided important information on how water affects ecosystem processes under global change. There is an urgent need to establish a systematic framework that can assess ecosystem dynamic responses to droughts under current and future global change and human activity, with a focus on the combined effects of droughts, global change drivers, and the corresponding hierarchical responses of an ecosystem.

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“…It covers a part of an ecologically important region-The Daurian International Protected Areas (DIPA), namely, The Hulun Lake Nature Reserve grassland. The Hulun Lake Nature Reserve is a reserved grassland and least influenced by human activities [14,15]. This draws attention to identify the consequences of water resource changes (consecutive years of precipitation deficit and decline in TWS) on representative natural grassland-vegetation with minimum anthropogenic disturbances.…”

Section: Study Areamentioning

confidence: 99%

Remote Sensing Based Analysis of Recent Variations in Water Resources and Vegetation of a Semi-Arid Region

Ning

Ishidaira

Udmale

et al. 2015

Water

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This study is designed to demonstrate use of free remote sensing data to analyze response of water resources and grassland vegetation to a climate change induced prolonged drought in a sparsely gauged semi-arid region. Water resource changes over Hulun Lake region derived from monthly Gravity Recovery and Climate Experiment (GRACE) and Tropical Rainfall Measuring Mission (TRMM) products were analyzed. The Empirical Orthogonal Functions (EOF) analysis results from both GRACE and TRMM showed decreasing trends in water storage changes and precipitation over 2002 to 2007 and increasing trends after 2007 to 2012. Water storage and precipitation changes on the spatial and temporal scale showed a very consistent pattern. Further analysis proved that water storage changes were mainly caused by precipitation and temperature changes in this region. It is found that a large proportion of grassland vegetation recovered to its normal state after above average rainfall in the following years (2008)(2009)(2010)(2011)(2012) and only a small proportion of grassland vegetation (16.5% of the study area) is degraded and failed to recover. These degraded grassland vegetation areas are categorized as ecologically vulnerable to climate change and protective strategies should be designed to prevent its further degradation. OPEN ACCESSWater 2015, 7 6040

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Drought and Its Consequences to Plants – From Individual to Ecosystem

Cited by 80 publications

References 99 publications

Physiological limitations in two sugarcane varieties under water suppression and after recovering

Physiological limitations in two sugarcane varieties under water suppression and after recovering

Drought and Carbon Cycling of Grassland Ecosystems under Global Change: A Review

Remote Sensing Based Analysis of Recent Variations in Water Resources and Vegetation of a Semi-Arid Region

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