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Lack of mitochondrial thioredoxin o 1 is compensated by antioxidant components under salinity in Arabidopsis thaliana plants
Author(s) -
Calderón Aingeru,
SánchezGuerrero Antonio,
OrtizEspín Ana,
MartínezAlcalá Isabel,
Camejo Daymi,
Jiménez Ana,
Sevilla Francisca
Publication year - 2018
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/ppl.12708
Subject(s) - catalase , superoxide dismutase , thioredoxin , arabidopsis thaliana , antioxidant , salinity , biology , lipid peroxidation , biochemistry , mutant , nitric oxide , botany , enzyme , horticulture , ecology , gene , endocrinology
In a changing environment, plants are able to acclimate to new conditions by regulating their metabolism through the antioxidant and redox systems involved in the stress response. Here, we studied a mitochondrial thioredoxin in wild‐type (WT) Arabidopis thaliana and two Attrxo1 mutant lines grown in the absence or presence of 100 mM NaCl. Compared to WT plants, no evident phenotype was observed in the mutant plants under control condition, although they had higher number of stomata, loss of water, nitric oxide and carbonyl protein contents as well as higher activity of superoxide dismutase (SOD) and catalase enzymes than WT plants. Under salinity, the mutants presented lower water loss and higher stomatal closure, H 2 O 2 and lipid peroxidation levels accompanied by higher enzymatic activity of catalase and the different SOD isoenzymes compared to WT plants. These inductions may collaborate in the maintenance of plant integrity and growth observed under saline conditions, possibly as a way to compensate the lack of TRXo1 . We discuss the potential of TRX o 1 to influence the development of the whole plant under saline conditions, which have great value for the agronomy of plants growing under unfavorable environment.