The diverse role of glutathione in plants

Jolić, Dino (2009) The diverse role of glutathione in plants. Bachelor's thesis, Faculty of Science > Department of Biology.

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Abstract

The tripeptide thiol glutathione plays a pivotal role in plant cell antioxidant defense system as well as numerous other roles in cellular defense, sulfur metabolism and exerting abiotic stress tolerance. Present in almost all organisms, acts as a redox buffer which partakes in information transport of cells. Glutathione is an important redox signaling component which interacts and integrates various cellular compartments and plant tissues. All functions depend or impact on concentration and/or redox state of leaf glutathione pools. Changes in these parameters act as signals that trigger adaptive responses in plants to environmental conditions. Total glutathione levels are defined by a complex interplay between biosynthesis, utilization, degradation, oxidation/reduction and transport. As a consequence of aerobic life, reactive oxygen species are formed by the partial reduction of oxygen. Oxidative stress occurs and glutathione as an antioxidant, can protect higher plant cells from oxidative damage. The remediation of reactive oxygen species is attained through an enzymatic and non-enzymatic pathway. It engages in the direct or indirect, through phytochelatin, elimination of heavy metals in cells, yields a certain stage of chilling tolerance as a crioprotectant and actively participates in sulfur assimilation. Glutathione influences higher plant growth and development by modifying mitosis and regulating genetic expression associated with certain stress responses.

Item Type: Thesis (Bachelor's thesis)
Supervisor: Vidaković-Cifrek, Željka
Date: 2009
Number of Pages: 21
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 08 Dec 2014 11:38
Last Modified: 08 Dec 2014 11:38
URI: http://digre.pmf.unizg.hr/id/eprint/3480

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