Chilling, oxidative stress and antioxidant responses in shoot cultures of rice

Fadzillah, Nor'Aini Mohd; Gill, Vera; Finch, R. P.; Burdon, Roy H.

doi:10.1007/bf00195186

Cited by 81 publications

(43 citation statements)

References 44 publications

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“…4A and 5A). Superoxide dismutation by SOD is a basic phase of defense against chilling injury [11]. H2O2 is scavenged by APX, and CAT and GR is involved in APX activity.…”

Section: Discussionmentioning

confidence: 99%

Photochemical Damage and Responses of Antioxidant Enzymes in Rice Leaves Induced to Light-Chilling

2009

Journal of Life Science

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W e investigated photooxidation and responses of antioxidant enzymes involved in scavenging reactive oxygen species (ROS) after light-chilling (4 o C) for 2 days and post chilling (25 o C) in rice leaves. Chilling leaves indicated a 50% reduction in photosynthetic efficiency (Fv/Fm ratio) and a 48% increase of H2O2, respectively, compared to the control group. In comparison with the control, activities of superoxide dismutase (SOD) and glutathione reductase (GR) increased at light-chilling and post-chilling. CuZn-SOD and Mn-SOD among SOD forms were detected in rice leaves, while Fe-SOD was not found. The increase of SOD and GR activity may serve as a basis for defense against chilling injury as it dismutase superoxide generated by light-chilling. Catalase (CAT) activity decreased during light-chilling, while activity of APX showed remarkable increase during light-chilling in rice leaves. Among CAT isoforms analyzed by 10% native PAGE, activities of isoform -2 and -3 were inhibited during light-chilling. From the elevated APX activity and decreased CAT activity, we suggest that these two enzymes show mutual supplementary relationships, indicating different tendency during light-chilling.

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“…4A and 5A). Superoxide dismutation by SOD is a basic phase of defense against chilling injury [11]. H2O2 is scavenged by APX, and CAT and GR is involved in APX activity.…”

Section: Discussionmentioning

confidence: 99%

Photochemical Damage and Responses of Antioxidant Enzymes in Rice Leaves Induced to Light-Chilling

2009

Journal of Life Science

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“…For example, induction of SOD or APX expression and activation is associated with the appearance of physiological injuries in plants under heat stress (Mazorra et al 2002 ). However, in most plant species, extreme conditions induce higher production of ROS, which overwhelms the scavenging activity of the antioxidant system, leading to severe cellular injury (Fadzillah et al 1996 ). It has been shown that under heat stress, plants accumulate higher amounts of non-enzymatic antioxidant and up-regulate the expression of antioxidant enzymes (Almeselmani et al 2009 ).…”

Section: Oxidative Responsesmentioning

confidence: 98%

Molecular Physiology of Heat Stress Responses in Plants

Hemmati

Gupta

Basu

2015

Elucidation of Abiotic Stress Signaling in Plants

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Heat stress is one of the major abiotic stresses that plants encounter. Heat stress causes billions of dollars in losses of agricultural crops worldwide. Here, we summarize the molecular and whole genome responses due to heat stress in plants. It has been reported that there are cascades of biochemical reactions that lead to heat stress. In most cases, heat stress is coupled with drought stress response. With the advancements in genomic tools, we have more information on genes, which are upor down-regulated in plants due to heat stress. The heat-stressed plants may exhibit various physiological responses, including stomatal closure, suppressed photosynthesis, stunted growth, etc. Microarray and transcriptome sequencing gave us the tools to perform genome-wide expression profi ling in heat-stressed plants. Understanding how gene expression in heat-stressed plants works will help us to discover novel heat stress-tolerant genes. These genes could be overexpressed in crop plants to make transgenic heat-tolerant agricultural crops. Climate change and global warming are major concerns for us and production of thermotolerant plants could address the issue of global crop loss due to heat and drought stresses.

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“…These enzymes remove free radicals and prevent the membranes and DNA from oxidative damage. Decrease in antioxidant activity in stressed tissues results in higher levels of active oxygen species (AOS) that may contribute to plant cell injury (Fadzillah et al, 1996). Significant difference among genotypes was observed for peroxidase activity in both induced and control treatments.…”

Section: Assessment Of Antioxidant Enzymes Of Tir Exposed Soybean Genmentioning

confidence: 99%

Temperature induction response reveals intrinsic thermotolerant genotypes in soybean

Ange

Srividhya

Vijayalakshmi

et al. 2016

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The responses of soybean genotypes to high temperature for intrinsic tolerance was studied using Temperature Induction Response (TIR) technique in order identify the genotypes tolerant to high temperature stress. Seven soybean genotypes subjected to lethal and sub lethal temperatures showed significant variation for acquired thermotolerance. Thermotolerant genotypes ADT 1 and CoSoy1 identified by the TIR technique, demonstrated higher survival percentage, and lower growth reduction. Further the tolerant genotypes identified based on TIR also showed higher antioxidant enzymes activity implying the critical role of antioxidant in cellular thermotolerance. This clearly demonstrated that TIR can be effectively used for screening high temperature tolerance genotypes in soybean. This study also established the fact that the alternations in antioxidants during induction are vital for imparting tolerance to high temperature stress.

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Chilling, oxidative stress and antioxidant responses in shoot cultures of rice

Cited by 81 publications

References 44 publications

Photochemical Damage and Responses of Antioxidant Enzymes in Rice Leaves Induced to Light-Chilling

Photochemical Damage and Responses of Antioxidant Enzymes in Rice Leaves Induced to Light-Chilling

Molecular Physiology of Heat Stress Responses in Plants

Temperature induction response reveals intrinsic thermotolerant genotypes in soybean

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