NDLI: Overexpression of the Arabidopsis photorespiratory pathway gene, serine: glyoxylate aminotransferase (AtAGT1), leads to salt stress tolerance in transgenic duckweed (Lemna minor)

Content Provider	Springer Nature Link
Author	Yang, Lin Han, Huajun Liu, Miaomiao Zuo, Zhaojiang Zhou, Kaiqiang Lü, Jianchao Zhu, Yerong Bai, Yanling Wang, Yong
Copyright Year	2013
Abstract	Salt stress has attracted increasing attention due to its toxic ability to restrict plant growth, and the photorespiration pathway has been shown to develop improved plant tolerance to abiotic stress. In this study, an Arabidopsis photorespiratory pathway gene serine: glyoxylate aminotransferase (SGAT), named as AtAGT1, was successfully overexpressed in duckweed (Lemna minor) to investigate the salinity defense capability in three transgenic overexpressed (OE) lines. Increased SGAT activity and decreased endogenous serine levels in these transgenic plant lines under salt stress resulted in enhanced protection against root abscission, higher maximum quantum yield of photosystem II (Fv/Fm), increased defense from cell damage as a result of improved cell membrane integrity, a decrease of reactive oxygen species (ROS) accumulation, and a strengthened antioxidant system. The salt tolerance in these transgenic OE lines indicates that the improvement of photorespiration stimulated the antioxidant system to scavenge ROS. The change of serine level also suggests the role of serine during salt stress. This transgenic engineering in duckweed not only introduced salt tolerance to this aquatic plant but also reveals a significant role of photorespiration during salinity stress.
Starting Page	407
Ending Page	416
Page Count	10
File Format	PDF
ISSN	01676857
Journal	Plant Cell, Tissue and Organ Culture (PCTOC)
Volume Number	113
Issue Number	3
e-ISSN	15735044
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-01-08
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Salt stress Photorespiration SGAT l-serine Oxidative stress Duckweed Plant Sciences Plant Physiology Plant Genetics & Genomics Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Horticulture

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