Effect of Drought Stress on Lipid Metabolism in the Leaves of Arabidopsis thaliana (Ecotype Columbia)

Gigon, Agnès; Matos, Ana Rita; Laffray, D.; Zuily-Fodil, Yasmine; Pham-Thi, Anh-Thu

doi:10.1093/aob/mch150

Cited by 374 publications

(298 citation statements)

References 39 publications

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“…Similar reduction was due to a sharp decrease in GL, PL and NL. The same tendency was reported as a result of heavy metal toxicity (Quartacci et al 2001;Ben Yousef et al 2005;Nouairi et al 2005), salinity (Ben Hamed et al 2005) and drought stress (Gigon et al 2004). Changes in the PL level due to metallic treatment may affect the fluidity.…”

Section: Discussionsupporting

confidence: 75%

The effect of cadmium on lipid and fatty acid biosynthesis in tomato leaves

et al. 2008

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Abstract:This research aims to examine the effect of cadmium uptake on lipid composition and fatty acid biosynthesis, in young leaves of tomato treated seedlings (Lycopersicon esculentum cv. Ibiza F1). Results in membrane lipids investigations revealed that high cadmium concentrations affect the main lipid classes, leading to strong changes in their composition and fatty acid content. Thus, the exposure of tomato plants to cadmium caused a concentration-related decrease in the unsaturated fatty acid content, resulting in a lower degree of fatty acid unsaturation. The level of lipid peroxides was significantly enhanced at high Cd concentrations. Studies of the lipid metabolism using radioactive labelling with [1-14 C]acetate as a major precursor of lipid biosynthesis, showed that levels of radioactivity incorporation in total lipids as well as in all lipid classes were lowered by Cd doses. In total lipid fatty acids, [1-14 C]acetate incorporation was reduced in tri-unsaturated fatty acids (C16:3 and C18:3); While it was enhanced in the palmitic (C16:0), palmitoleic (C16:1), stearic (C18:0) and linoleic (C18:2) acids. [1-14 C]acetate incorporation into C16:3 and C18:3 of galactolipids [monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG)] and some phospholipids [phosphatidylcholine (PC) and phosphatidylglycerol (PG)] was inhibited by Cd stress. Our results showed that in tomato plants, cadmium stress provoked an inhibition of polar lipid biosynthesis and reduced fatty acid desaturation process.

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Section: Discussionsupporting

confidence: 75%

The effect of cadmium on lipid and fatty acid biosynthesis in tomato leaves

et al. 2008

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“…Another possibility of ion leakage from the cell may be due to thermalinduced inhibition of membrane-bound enzymes responsible for maintaining chemical gradients in the cell (Reynolds et al, 2001). Arabidopsis leaf membranes appeared to be very resistant to water deficit, as shown by their capacity to maintain polar lipid contents and the stability of their composition under severe drought (Gigon et al, 2004).…”

Section: Cell Membrane Stabilitymentioning

confidence: 99%

Plant drought stress: effects, mechanisms and management

Farooq

Wahid

Kobayashi

et al. 2009

Agron. Sustain. Dev.

3,058

1,622

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-Scarcity of water is a severe environmental constraint to plant productivity. Drought-induced loss in crop yield probably exceeds losses from all other causes, since both the severity and duration of the stress are critical. Here, we have reviewed the effects of drought stress on the growth, phenology, water and nutrient relations, photosynthesis, assimilate partitioning, and respiration in plants. This article also describes the mechanism of drought resistance in plants on a morphological, physiological and molecular basis. Various management strategies have been proposed to cope with drought stress. Drought stress reduces leaf size, stem extension and root proliferation, disturbs plant water relations and reduces water-use efficiency. Plants display a variety of physiological and biochemical responses at cellular and whole-organism levels towards prevailing drought stress, thus making it a complex phenomenon. CO 2 assimilation by leaves is reduced mainly by stomatal closure, membrane damage and disturbed activity of various enzymes, especially those of CO 2 fixation and adenosine triphosphate synthesis. Enhanced metabolite flux through the photorespiratory pathway increases the oxidative load on the tissues as both processes generate reactive oxygen species. Injury caused by reactive oxygen species to biological macromolecules under drought stress is among the major deterrents to growth. Plants display a range of mechanisms to withstand drought stress. The major mechanisms include curtailed water loss by increased diffusive resistance, enhanced water uptake with prolific and deep root systems and its efficient use, and smaller and succulent leaves to reduce the transpirational loss. Among the nutrients, potassium ions help in osmotic adjustment; silicon increases root endodermal silicification and improves the cell water balance. Low-molecular-weight osmolytes, including glycinebetaine, proline and other amino acids, organic acids, and polyols, are crucial to sustain cellular functions under drought. Plant growth substances such as salicylic acid, auxins, gibberrellins, cytokinin and abscisic acid modulate the plant responses towards drought. Polyamines, citrulline and several enzymes act as antioxidants and reduce the adverse effects of water deficit. At molecular levels several drought-responsive genes and transcription factors have been identified, such as the dehydration-responsive element-binding gene, aquaporin, late embryogenesis abundant proteins and dehydrins. Plant drought tolerance can be managed by adopting strategies such as mass screening and breeding, marker-assisted selection and exogenous application of hormones and osmoprotectants to seed or growing plants, as well as engineering for drought resistance. drought response / stomatal oscillation / osmoprotectants / hormones / stress proteins / drought management / CO 2

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“…Moreover, acyl hydrolases can stimulate the mobilization of lipid reserves to provide sugars that are involved in osmotic adjustment (Creelman & Mullet, 1997). Thus, in drought stressed Arabidopsis leaves increased lipolytic activity was associated with reduced lipid contents in response to drought (Gigon et al, 2004).…”

Section: The Effect Of Drought Stress On Soluble Proteins Lipid Acylmentioning

confidence: 99%

“…LAH present in protein extracts from potato tubers are lipolytic enzymes with different substrate preference (Anderson et al, 2002;Andrews et al, 1988;Hasson & Laties, 1976) that are capable of hydrolysing monoacylglycerols (MAG), phospholipids and galactolipids to form fatty acids and fatty acid hydroperoxides (Galliard, 1971), but can also be used under certain conditions to synthesize MAG (Macrae et al, 1998). Changes in the composition of membrane lipids may contribute to protect cell membranes under stress conditions (Gigon et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Influence of Drought and Wounding Stress on Soluble Phenols and Proteins in Potato Tubers

Wegener¹,

Jansen²,

Jürgens³

2014

SAR

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Potato is a valuable source for phytochemicals like vitamins, minerals, plant phenols, amino acids and proteins. However, environmental stress may affect the level of all these components. In this study, two purple breeding clones and one yellow fleshed cultivar (cv.) were assessed in their response to drought and wounding stress in two consecutive years. The plants were grown in the greenhouse under control (sufficient water supply) and with drought stress conditions. After harvest the tubers were analyzed for the content of soluble phenols and proteins in fresh tissue and after wounding. In addition, free amino acids (AAS) and activity of lipid acyl hydrolases (LAH) were assayed in control and drought stressed tubers. The results revealed significant differences in soluble phenols and proteins between genotypes, and that drought stress significantly increased the level of soluble proteins (P < 0.0001) and LAH activity (P < 0.001), but had no significant effect on the concentration of phenols. Moreover, total amounts of free AAS were higher in the drought stress variant. Wounding stress caused a significant increase of soluble phenols in cv. Agave. But, this was less prominent in purple clones which in general had higher contents of phenols. Proteins were also enhanced as a result of wounding, although, the effect of wounding stress on their level was smaller than that of drought stress.

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Effect of Drought Stress on Lipid Metabolism in the Leaves of Arabidopsis thaliana (Ecotype Columbia)

Cited by 374 publications

References 39 publications

The effect of cadmium on lipid and fatty acid biosynthesis in tomato leaves

The effect of cadmium on lipid and fatty acid biosynthesis in tomato leaves

Plant drought stress: effects, mechanisms and management

Influence of Drought and Wounding Stress on Soluble Phenols and Proteins in Potato Tubers

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