Growth irradiance affects ureide accumulation and tolerance to photoinhibition in Eutrema salsugineum (Thellungiella salsuginea)

Plants are able to acclimate to their growth light environments by utilizing a number of short- and long-term mechanisms. One strategy is to prevent accumulation of excess reactive oxygen species that can lead to photoinhibition of photosynthesis. Ureides, generated from purine degradation, have bee...

Full description

Saved in:
Bibliographic Details
Published in:Photosynthetica 2016-03, Vol.54 (1), p.93-100
Main Authors: Malik, V. M, Lobo, J. M, Stewart, C, Irani, S, Todd, C. D, Gray, G. R
Format: Article
Language:English
Subjects:
abiotic stress
acclimation
antioxidants
biochemical pathways
Biomedical and Life Sciences
Eutrema
Eutrema salsugineum
Life Sciences
light intensity
Original Papers
oxidative stress
photochemistry
photoinhibition
photosystem II
Plant Physiology
reactive oxygen species
stress response
temperature
Thellungiella salsuginea
ureides
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Plants are able to acclimate to their growth light environments by utilizing a number of short- and long-term mechanisms. One strategy is to prevent accumulation of excess reactive oxygen species that can lead to photoinhibition of photosynthesis. Ureides, generated from purine degradation, have been proposed as antioxidants and involved in certain abiotic stress responses. Eutrema salsugineum (Thellungiella salsuginea) is an extremophilic plant known to exhibit a high degree of tolerance to a variety of abiotic stresses that invariably generate reactive oxygen species. In the present study we have investigated the possible role of the ureide metabolic pathway during acclimation to growth irradiance and its conference of tolerance to photoinhibition in Eutrema. Ureide accumulation was greater under high light growth which also conferred tolerance to photoinhibition at low temperature as measured by the maximal quantum yield of PSII photochemistry. This may represent an adaptive plastic response contributing to the extreme tolerance exhibited by this plant. Our results would provide evidence that ureide accumulation may be involved in abiotic stress as another defence mechanism in response to oxidative stress.
ISSN:0300-3604
1573-9058
DOI:10.1007/s11099-015-0164-8