Lipid metabolism and oxidation in plants subjected to abiotic stresses

Sofo, Adriano; Scopa, Antonio; Hashem, Abeer; Abd_Allah, Elsayed Fathi

doi:10.1002/9781119081005.ch11

Cited by 8 publications

(3 citation statements)

References 70 publications

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“…Enhanced expression of the POD enzymes results in the increased production of lignins and the associated protective compounds like quinones which ultimately work for reducing the damage induced by oxidative stress. Efficient detoxifications of ROS help plants in maintenance of growth and the physiological activity of plant [4, 12, 13]. Increase in the activity of antioxidant enzymes (SOD and POD) as a result of AMF colonization coincides with the results of Abd Allah et al [13] for Phaseolus vulgaris and Alqarawi et al [37] for Ephedra aphylla .…”

Section: Discussionsupporting

confidence: 54%

“…Recent studies have shown that the colonization of plant roots with PGPR and AMF increases plants tolerance to salinity [ 10 ] through induction of osmoregulation and modulation of the impact of salt stress [ 2 , 11 , 12 ]. Plants inoculated with AMF show lower lipid peroxidation and enhanced antioxidant enzyme activities in common bean [ 13 ] as systemic resistance tool against salt stress.…”

Section: Introductionmentioning

confidence: 99%

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Induction of Osmoregulation and Modulation of Salt Stress inAcacia gerrardiiBenth. by Arbuscular Mycorrhizal Fungi andBacillus subtilis(BERA 71)

Hashem

Abd_Allah

Alqarawi³

et al. 2016

BioMed Research International

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The role of soil microbiota in plant stress management, though speculated a lot, is still far from being completely understood. We conducted a greenhouse experiment to examine synergistic impact of plant growth promoting rhizobacterium, Bacillus subtilis (BERA 71), and arbuscular mycorrhizal fungi (AMF) (Claroideoglomus etunicatum; Rhizophagus intraradices; and Funneliformis mosseae) to induce acquired systemic resistance in Talh tree (Acacia gerrardii Benth.) against adverse impact of salt stress. Compared to the control, the BERA 71 treatment significantly enhanced root colonization intensity by AMF, in both presence and absence of salt. We also found positive synergistic interaction between B. subtilis and AMF vis-a-vis improvement in the nutritional value in terms of increase in total lipids, phenols, and fiber content. The AMF and BERA 71 inoculated plants showed increased content of osmoprotectants such as glycine, betaine, and proline, though lipid peroxidation was reduced probably as a mechanism of salt tolerance. Furthermore, the application of bioinoculants to Talh tree turned out to be potentially beneficial in ameliorating the deleterious impact of salinity on plant metabolism, probably by modulating the osmoregulatory system (glycine betaine, proline, and phenols) and antioxidant enzymes system (SOD, CAT, POD, GR, APX, DHAR, MDAHR, and GSNOR).

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Section: Discussionsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Induction of Osmoregulation and Modulation of Salt Stress inAcacia gerrardiiBenth. by Arbuscular Mycorrhizal Fungi andBacillus subtilis(BERA 71)

Hashem

Abd_Allah

Alqarawi³

et al. 2016

BioMed Research International

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“…Oxidative stress caused by excessive ROS generation is another direct event that occurs in plants under drought stress. These same compounds, at lower concentrations, function as signal molecules to stimulate metabolic reprogramming for stress adaptation through regulating cellular redox status (Carvalho, 2008;Cou ee et al, 2006;Harding et al, 2003;Hasanuzzaman et al, 2013;Keunen et al, 2013;Sofo et al, 2015). Moreover, under oxidative stress caused by drought, hydroperoxidation of polyunsaturated fatty acids caused by lipoxygenase (LOX) can further stimulate oxylipin production both in maize kernel tissue and in invading A. flavus mycelia (Das and Roychoudhury, 2014;Reverberi et al 2008).…”

Section: Drought-induced Metabolic Alterations and Oxidative Stress Amentioning

confidence: 99%

Deciphering drought‐induced metabolic responses and regulation in developing maize kernels

Yang

Fountain

et al. 2018

Plant Biotechnology Journal

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SummaryDrought stress conditions decrease maize growth and yield, and aggravate preharvest aflatoxin contamination. While several studies have been performed on mature kernels responding to drought stress, the metabolic profiles of developing kernels are not as well characterized, particularly in germplasm with contrasting resistance to both drought and mycotoxin contamination. Here, following screening for drought tolerance, a drought‐sensitive line, B73, and a drought‐tolerant line, Lo964, were selected and stressed beginning at 14 days after pollination. Developing kernels were sampled 7 and 14 days after drought induction (DAI) from both stressed and irrigated plants. Comparative biochemical and metabolomic analyses profiled 409 differentially accumulated metabolites. Multivariate statistics and pathway analyses showed that drought stress induced an accumulation of simple sugars and polyunsaturated fatty acids and a decrease in amines, polyamines and dipeptides in B73. Conversely, sphingolipid, sterol, phenylpropanoid and dipeptide metabolites accumulated in Lo964 under drought stress. Drought stress also resulted in the greater accumulation of reactive oxygen species (ROS) and aflatoxin in kernels of B73 in comparison with Lo964 implying a correlation in their production. Overall, field drought treatments disordered a cascade of normal metabolic programming during development of maize kernels and subsequently caused oxidative stress. The glutathione and urea cycles along with the metabolism of carbohydrates and lipids for osmoprotection, membrane maintenance and antioxidant protection were central among the drought stress responses observed in developing kernels. These results also provide novel targets to enhance host drought tolerance and disease resistance through the use of biotechnologies such as transgenics and genome editing.

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