Preservation of Thermal Stability of Cell Membranes and Gas Exchange in High Temperature Acclimated Xylia xylocarpa Seedlings

Saelim, S.; Zwiazek, Janusz J.

doi:10.1016/s0176-1617(00)80077-2

Cited by 24 publications

(14 citation statements)

References 15 publications

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“…A major impact of oxidative stress is a perturbed function or complete dysfunction of cellular membranes, which can increase cell permeability and ion leakage. In our study, electrolyte leakage was more pronounced under temperature and salt stress, which has been observed elsewhere: low temperature 55 , 56 , high temperature 57 and salt stress 58 . Lipid peroxidation is one of the criteria for determining the impact of extreme temperature and salt stress; MDA is the end product of this reaction and is commonly considered a signal of oxidative stress 20 , 28 , 59 .…”

Section: Discussionsupporting

confidence: 87%

28-homobrassinolide regulates antioxidant enzyme activities and gene expression in response to salt- and temperature-induced oxidative stress in Brassica juncea

Kaur

Sirhindi

Bhardwaj³

et al. 2018

Sci Rep

124

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Brassinosteroids (BRs) are a group of naturally occurring plant steroid hormones that can induce plant tolerance to various plant stresses by regulating ROS production in cells, but the underlying mechanisms of this scavenging activity by BRs are not well understood. This study investigated the effects of 28-homobrassinolide (28-HBL) seed priming on Brassica juncea seedlings subjected to the combined stress of extreme temperatures (low, 4 °C or high, 44 °C) and salinity (180 mM), either alone or supplemented with 28-HBL treatments (0, 10−6, 10−9, 10−12 M). The combined temperature and salt stress treatments significantly reduced shoot and root lengths, but these improved when supplemented with 28-HBL although the response was dose-dependent. The combined stress alone significantly increased H2O2 content, but was inhibited when supplemented with 28-HBL. The activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APOX), glutathione reductase (GR), dehydroascorbate reductase (DHAR) and monodehydroascorbate reductase (MDHAR) increased in response to 28-HBL. Overall, the 28-HBL seed priming treatment improved the plant’s potential to combat the toxic effects imposed by the combined temperature and salt stress by tightly regulating the accumulation of ROS, which was reflected in the improved redox state of antioxidants.

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Section: Discussionsupporting

confidence: 87%

28-homobrassinolide regulates antioxidant enzyme activities and gene expression in response to salt- and temperature-induced oxidative stress in Brassica juncea

Kaur

Sirhindi

Bhardwaj³

et al. 2018

Sci Rep

124

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“…Electrolyte leakage analysis has been shown to be a reliable, quantitative and reproducible assay to predict thermotolerance in a variety of plants [ 76 , 77 ]. An electrolyte leakage analysis was performed using a conductivity meter (Rex DDS-307A, INESA, Shanghai, China).…”

Section: Methodsmentioning

confidence: 99%

The DNA Methylome and Association of Differentially Methylated Regions with Differential Gene Expression during Heat Stress in Brassica rapa

Liu

Xia

Hou

et al. 2018

IJMS

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Cytosine DNA methylation is a critical epigenetic mechanism in the silencing of transposable elements, imprinting and regulating gene expression. However, little is known about the potential role of mC in response to heat stress. To determine and explore the functions of the dynamic DNA methylome during heat stress, we characterized single-base resolution methylome maps of Brassica rapa and assessed the dynamic changes of mC under heat stress using whole genome bisulfite sequencing. On average, the DNA methylation levels of CG, CHG and CHH are 39.3%, 15.38% and 5.24% in non-heading Chinese cabbage (NHCC), respectively. We found that the patterns of methylation are similar to other eudicot plants, but with higher CHH methylation levels. Further comparative analysis revealed varying patterns for three sequence contexts (mCG, mCHG and mCHH) under heat stress indicating context- and position-dependent methylation regulation. DNA methylation near the TSS and TES may be closely associated with methylation-dependent transcriptional silencing. Association analysis of differential methylation and differential gene expression revealed a different set of methDEGs involved at early and late stages under heat stress. The systemic characterization of the dynamic DNA methylome during heat stress will improve our understanding of the mechanism of epigenetic regulation under heat stress.

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“…However, leaves that emerged during hot mid-summer conditions initiated isoprene emission within 6 d, and also increased more rapidly than in springtime. The induction and long-term change of both the photosynthetic capacity (Berry & Bjorkman 1980;Teskey & Will 1999;Saelim & Zwiazek 2000) and the isoprene emission capacity (Petron et al 2001) depends on the growth temperature history. The temporal delay between induction of both metabolic pathways observed in temperate regions may be explained by different temperature threshold levels.…”

Section: Change Of Isoprene Emission Capacity During Different Stagesmentioning

confidence: 99%

Strong correlation between isoprene emission and gross photosynthetic capacity during leaf phenology of the tropical tree species Hymenaea courbaril with fundamental changes in volatile organic compounds emission composition during early leaf development

Kühn

Rottenberger

Biesenthal

et al. 2004

Plant Cell & Environment

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Changes of the volatile organic compounds (VOC) emission capacity and composition of different developmental stages of the tropical tree species Hymenaea courbaril were investigated under field conditions at a remote Amazonian rainforest site. The basal emission capacity of isoprene changed considerably over the course of leaf development, from young to mature and to senescent leaves, ultimately spanning a wide range of observed isoprene basal emission capacities from 0.7 to 111.5 m m m m g C g ---during the course of the year. By adjusting the standard emission factors for individual days, the diel courses of instantaneous isoprene emission rates could nevertheless adequately be modelled by a current isoprene algorithm. The results demonstrate the inadequacy of using one single standard emission factor to represent the VOC emission capacity of tropical vegetation for an entire seasonal cycle. A strong linear correlation between the isoprene emission capacity and the gross photosynthetic capacity (GP max ) covering all developmental stages and seasons was observed. The present results provide evidence that leaf photosynthetic properties may confer a valuable basis to model the seasonal variation of isoprenoid emission capacity; especially in tropical regions where the environmental conditions vary less than in temperate regions. In addition to induction and variability of isoprene emission during early leaf development, considerable amounts of monoterpenes were emitted in a light-dependent manner exclusively in the period between bud break and leaf maturity. The fundamental change in emission composition during this stage as a consequence of resource availability ( supply side control ) or as a plant's response to the higher defence demand of young emerging leaves ( demand-side control ) is discussed. The finding of a temporary emergence of monoterpene emission may be of general interest in understanding both the ecological functions of isoprenoid production and the regulatory processes involved.

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Preservation of Thermal Stability of Cell Membranes and Gas Exchange in High Temperature Acclimated Xylia xylocarpa Seedlings

Cited by 24 publications

References 15 publications

28-homobrassinolide regulates antioxidant enzyme activities and gene expression in response to salt- and temperature-induced oxidative stress in Brassica juncea

28-homobrassinolide regulates antioxidant enzyme activities and gene expression in response to salt- and temperature-induced oxidative stress in Brassica juncea

The DNA Methylome and Association of Differentially Methylated Regions with Differential Gene Expression during Heat Stress in Brassica rapa

Strong correlation between isoprene emission and gross photosynthetic capacity during leaf phenology of the tropical tree species Hymenaea courbaril with fundamental changes in volatile organic compounds emission composition during early leaf development

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