Drought Stress in Plants: An Overview

Farooq, Muhammad; Hussain, Mubshar; Wahid, Abdul; Siddique, Kadambot H.M.

doi:10.1007/978-3-642-32653-0_1

Cited by 316 publications

(261 citation statements)

References 154 publications

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“…To optimize C assimilation and usage during drought, DM accumulation is reduced in all plant components, though with different magnitudes (Farooq et al 2012). In forage plants, a decrease in growth and development of leaf area is the first sign, resulting in smaller leaves and reduced LAI (Sanderson et al 1997).…”

Section: Growth and Dry Matter Production Under Water-limited Conditionssupporting

confidence: 40%

“…In addition, rates of leaf and stem production are affected and depend on species and water stress conditions (Likoswe and Lawn 2008). Turgor loss seems the primary factor limiting growth by blocking cell elongation and division (Farooq et al 2012). Declines in plant growth and DM production in herbaceous legumes can vary between and within species (Likoswe and Lawn 2008;Pang et al 2011) and in this study the magnitude of the reductions in DM production appeared to vary according to plant age.…”

Section: Growth and Dry Matter Production Under Water-limited Conditionsmentioning

confidence: 41%

“…Among interrelated effects of water deficit on plant functioning are: a decrease in cell division and extension; reduction of net CO2 assimilation by either stomatal or non-stomatal limitations; reduced shoot and/or root growth; and alteration of water relations, oxidative defense, mineral nutrition and water use efficiency (Turner and Begg 1981;Ludlow 1989;Farooq et al 2012).…”

Section: Introductionmentioning

confidence: 41%

“…increased leaf wilting and senescence in C. molle, and a decline in leaf biomass production in C. macrocarpum. Under waterlimited conditions, SLA decreases due to active accumulation of cell wall components (Barker and Caradus 2001), which aids in reducing transpiration (De Micco and Aronne 2012;Farooq et al 2012). However, this study showed the low plasticity of SLA (or alternatively, LMA: leaf mass area) to reduced water availability.…”

Section: Morphological Traits Contributing To Drought Acclimation In mentioning

confidence: 46%

See 3 more Smart Citations

Survival strategies of Centrosema molle and C. macrocarpum in response to drought

Guenni

Romero

Guedez

et al. 2016

Trop. Grassl.-Forrajes Trop.

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Section: Growth and Dry Matter Production Under Water-limited Conditionssupporting

confidence: 40%

Section: Growth and Dry Matter Production Under Water-limited Conditionsmentioning

confidence: 41%

Section: Introductionmentioning

confidence: 41%

Section: Morphological Traits Contributing To Drought Acclimation In mentioning

confidence: 46%

See 2 more Smart Citations

Survival strategies of Centrosema molle and C. macrocarpum in response to drought

Guenni

Romero

Guedez

et al. 2016

Trop. Grassl.-Forrajes Trop.

View full text Add to dashboard Cite

“…Among the abiotic stresses, drought has a crucial devastating impact on agricultural production (Farooq et al 2009;Farooq et al 2012). Plants recruit complex overlapping mechanisms to reprogram their gene expression to cope with drought stress (Ahuja et al 2010;Golldack et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Mining expressed sequence tags of rapeseed (Brassica napus L.) to predict the drought responsive regulatory network

Shamloo‐Dashtpagerdi

Razi

Ebrahimie

2015

Physiol Mol Biol Plants

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It is of great significance to understand the regulatory mechanisms by which plants deal with drought stress. Two EST libraries derived from rapeseed (Brassica napus) leaves in non-stressed and drought stress conditions were analyzed in order to obtain the transcriptomic landscape of drought-exposed B. napus plants, and also to identify and characterize significant drought responsive regulatory genes and microRNAs. The functional ontology analysis revealed a substantial shift in the B. napus transcriptome to govern cellular drought responsiveness via different stress-activated mechanisms. The activity of transcription factor and protein kinase modules generally increased in response to drought stress. The 26 regulatory genes consisting of 17 transcription factor genes, eight protein kinase genes and one protein phosphatase gene were identified showing significant alterations in their expressions in response to drought stress. We also found the six microRNAs which were differentially expressed during drought stress supporting the involvement of a posttranscriptional level of regulation for B. napus drought response. The drought responsive regulatory network shed light on the significance of some regulatory components involved in biosynthesis and signaling of various plant hormones (abscisic acid, auxin and brassinosteroids), ubiquitin proteasome system, and signaling through Reactive Oxygen Species (ROS). Our findings suggested a complex and multi-level regulatory system modulating response to drought stress in B. napus.

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Estimating Global Ecosystem Isohydry/Anisohydry Using Active and Passive Microwave Satellite Data

Guan

Gentine

et al. 2017

JGR Biogeosciences

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The concept of isohydry/anisohydry describes the degree to which plants regulate their water status, operating from isohydric with strict regulation to anisohydric with less regulation. Though some species level measures of isohydry/anisohydry exist at a few locations, ecosystem‐scale information is still largely unavailable. In this study, we use diurnal observations from active (Ku‐Band backscatter from QuikSCAT) and passive (X‐band vegetation optical depth (VOD) from Advanced Microwave Scanning Radiometer on EOS Aqua) microwave satellite data to estimate global ecosystem isohydry/anisohydry. Here diurnal observations from both satellites approximate predawn and midday plant canopy water contents, which are used to estimate isohydry/anisohydry. The two independent estimates from radar backscatter and VOD show reasonable agreement at low and middle latitudes but diverge at high latitudes. Grasslands, croplands, wetlands, and open shrublands are more anisohydric, whereas evergreen broadleaf and deciduous broadleaf forests are more isohydric. The direct validation with upscaled in situ species isohydry/anisohydry estimates indicates that the VOD‐based estimates have much better agreement than the backscatter‐based estimates. The indirect validation with prior knowledge suggests that both estimates are generally consistent in that vegetation water status of anisohydric ecosystems more closely tracks environmental fluctuations of water availability and demand than their isohydric counterparts. However, uncertainties still exist in the isohydry/anisohydry estimate, primarily arising from the remote sensing data and, to a lesser extent, from the methodology. The comprehensive assessment in this study can help us better understand the robustness, limitation, and uncertainties of the satellite‐derived isohydry/anisohydry estimates. The ecosystem isohydry/anisohydry has the potential to reveal new insights into spatiotemporal ecosystem response to droughts.

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Drought Stress in Plants: An Overview

Cited by 316 publications

References 154 publications

Survival strategies of Centrosema molle and C. macrocarpum in response to drought

Survival strategies of Centrosema molle and C. macrocarpum in response to drought

Mining expressed sequence tags of rapeseed (Brassica napus L.) to predict the drought responsive regulatory network

Estimating Global Ecosystem Isohydry/Anisohydry Using Active and Passive Microwave Satellite Data

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