Changes in water content and distribution in Quercus ilex leaves during progressive drought assessed by in vivo 1H magnetic resonance imaging

Sardans, Jordi; Peñuelas, Josep; Lope-Piedrafita, Silvia
January 2010
BMC Plant Biology;2010, Vol. 10, p188
Academic Journal
Background: Drought is a common stressor in many regions of the world and current climatic global circulation models predict further increases in warming and drought in the coming decades in several of these regions, such as the Mediterranean basin. The changes in leaf water content, distribution and dynamics in plant tissues under different soil water availabilities are not well known. In order to fill this gap, in the present report we describe our study withholding the irrigation of the seedlings of Quercus ilex, the dominant tree species in the evergreen forests of many areas of the Mediterranean Basin. We have monitored the gradual changes in water content in the different leaf areas, in vivo and non-invasively, by 1H magnetic resonance imaging (MRI) using proton density weighted (pw) images and spin-spin relaxation time (T2) maps. Results: rw images showed that the distal leaf area lost water faster than the basal area and that after four weeks of similar losses, the water reduction was greater in leaf veins than in leaf parenchyma areas and also in distal than in basal leaf area. There was a similar tendency in all different areas and tissues, of increasing T2 values during the drought period. This indicates an increase in the dynamics of free water, suggesting a decrease of cell membranes permeability. Conclusions: The results indicate a non homogeneous leaf response to stress with a differentiated capacity to mobilize water between its different parts and tissues. This study shows that the MRI technique can be a useful tool to follow non-intrusively the in vivo water content changes in the different parts of the leaves during drought stress. It opens up new possibilities to better characterize the associated physiological changes and provides important information about the different responses of the different leaf areas what should be taken into account when conducting physiological and metabolic drought stress studies in different parts of the leaves during drought stress.


Related Articles

  • Effect of year-to-year variability of leaf area index on variable infiltration capacity model performance and simulation of streamflow during drought. Tesemma, Z. K.; Wei, Y.; Peel, M. C.; Western, A. W. // Hydrology & Earth System Sciences Discussions;2014, Vol. 11 Issue 9, p10515 

    This study assessed the effect of using observed monthly leaf area index (LAI) on hydrologic model performance and the simulation of streamflow during drought using the variable infiltration capacity (VIC) hydrological model in the Goulburn-Broken catchment of Australia, which has heterogeneous...

  • THE APPLICATION OF MODIFIED NORMALIZED DIFFERENCE WATER INDEX BY LEAF AREA INDEX IN THE RETRIEVAL OF REGIONAL DROUGHT MONITORING. Hong-wei Zhang; Huai-liang Chen // International Archives of the Photogrammetry, Remote Sensing & S;4/28/2015, Vol. 40-7/W3, p141 

    The vegetation coverage is one of the important factors that restrict the accuracy of remote sensing retrieval of soil moisture. In order to effectively improve the accuracy of the remote sensing retrieval of soil moisture and to reduce the impact of vegetation coverage variation on the...

  • Identification of cowpea genotypes for drought tolerance. Bastos, Edson Alves; do Nascimento, Sebastião Pereira; da Silva, Everaldo Moreira; Freire Filho, Francisco Rodrigues; Gomide, Reinaldo Lúcio // Revista Ciência Agronômica;Jan2011, Vol. 42 Issue 1, p100 

    The genotypes selection for drought tolerance is very important for world food production, principally in arid regions or sites with irregular rain distribution. The objective of this work was to identify cowpea genotypes with drought tolerance and water stress sensitivity characteristics. Two...

  • Seed yield and some physiological traits of safflower as affected by water deficit stress. Amini, H.; Arzani, A.; Bahrami, F. // International Journal of Plant Production;Jul2013, Vol. 7 Issue 3, p597 

    Safflower (Carthamustinctorius L.) is an oilseed crop adapted to drought prone arid and semi-arid environments. This study was conducted to evaluate the effects of water deficit stress on antioxidant activity, membrane stability index (MSI), leaf chlorophyll content, leaf area index (LAI) and...

  • Regional Model Simulations of the 2008 Drought in Southern South America Using a Consistent Set of Land Surface Properties. Müller, Omar V.; Berbery, Ernesto Hugo; Alcaraz-Segura, Domingo; Ek, Michael B. // Journal of Climate;Sep2014, Vol. 27 Issue 17, p6754 

    This work discusses the land surface-atmosphere interactions during the severe drought of 2008 in southern South America, which was among the most severe in the last 50 years in terms of both intensity and extent. Once precipitation returned to normal values, it took about two months for the...

  • Drought tolerance in two perennial bunchgrasses used for restoration in the Intermountain West, USA. Mukherjee, Jayanti Ray; Jones, Thomas A.; Adler, Peter B.; Monaco, Thomas A. // Plant Ecology;Mar2011, Vol. 212 Issue 3, p461 

    n ideal restoration species for the semi-arid Intermountain West, USA would be one that grows rapidly when resources are abundant in the spring, yet tolerates summer's drought. We compared two perennial C Triticeae Intermountain-native bunchgrasses, the widely occurring Pseudoroegneria spicata...

  • Suitability of modelled and remotely sensed essential climate variables for monitoring Euro-Mediterranean droughts. Szczypta, C.; Calvet, J.-C.; Maignan, F.; Dorigo, W.; Baret, F.; Ciais, P. // Geoscientific Model Development Discussions;2013, Vol. 6 Issue 4, p5553 

    Two new remotely sensed Leaf Area Index (LAI) and Surface Soil Moisture (SSM) satellite products are compared with two sets of simulations of the ORCHIDEE and ISBA-A-gs land surface models to investigate how recent droughts affected vegetation over the Euro-Mediterranean area. We analyze the...

  • Nitrogen Loading Enhances Stress Impact of Drought on a Semi-natural Temperate Grassland. Kübert, Angelika; Götz, Miriam; Kuester, Emma; Piayda, Arndt; Werner, Christiane; Rothfuss, Youri; Dubbert, Maren // Frontiers in Plant Science;8/30/2019, p1 

    Two important threats to the sustainable functioning of seminatural grasslands in temperate zones are (1) nutrient loading due to agricultural fertilization and pollution, and (2) the increase of extreme drought events due to climate change. These threats may cause substantial shifts in species...

  • Soil hydraulic parameters estimated from satellite information through data assimilation. Charoenhirunyingyos, Sujittra; Honda, Kiyoshi; Kamthonkiat, Daroonwan; Ines, AmorV. M. // International Journal of Remote Sensing;12/10/2011, Vol. 32 Issue 23, p8033 

    Leaf area index (LAI) and actual evapotranspiration (ETa) from satellite observations were used to estimate simultaneously the soil hydraulic parameters of four soil layers down to 60 cm depth using the combined soil water atmosphere plant and genetic algorithm (SWAP–GA) model. This...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics