Superoxide Dismutase: A Stable Biochemical Marker for Abiotic Stress Tolerance in Higher Plants

Tonoplast Intrinsic Proteins (TIP) are one of five subfamilies of aquaporins in higher plants. Plants typically contain a large number of TIP genes, ranging from 6 to 35 compared to humans. The molecular weight of the TIP subfamily members ranges from 25 to 28 kDa. Despite their sequence diversity, all TIP monomers have the same structure, which consists of six transmembrane helices and five inter-helical loops that form an hourglass shape with a central pore. Four monomers form tetramers, which are functional units in the membrane. TIPs form channels in the tonoplast that basically function as regulators of the intracellular water flow, which implies that they have a role in regulating cell turgor. TIPs are responsible for precisely regulating the movement of not only water, but also some small neutral molecules such as glycerol, urea, ammonia, hydrogen peroxide and formamide. The expression of TIPs may be affected by different environmental stresses, including drought, salinity and cold. TIPs expression is also altered by phytohormones and the appropriate cis-regulatory motifs are identified in the promotor region of the genes encoding TIPs in different plant species. It was shown that manipulating TIP-encoding genes expression in plants could have the potential to improve abiotic stress tolerance.

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Superoxide Dismutase (SOD) and Abiotic Stress Tolerance in Plants

Oxidative Damage to Plants ◽

10.1016/b978-0-12-799963-0.00003-4 ◽

2014 ◽

pp. 89-129 ◽

Cited By ~ 12

Author(s):

Réka Szőllősi

Keyword(s):

Superoxide Dismutase ◽

Abiotic Stress ◽

Stress Tolerance ◽

Abiotic Stress Tolerance

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Selenium in Higher Plants: Physiological Role, Antioxidant Metabolism and Abiotic Stress Tolerance

Journal of Plant Sciences ◽

10.3923/jps.2010.354.375 ◽

2010 ◽

Vol 5 (4) ◽

pp. 354-375 ◽

Cited By ~ 81

Author(s):

Mirza Hasanuzzam ◽

M. Anwar Hossain ◽

Masayuki Fujita

Keyword(s):

Abiotic Stress ◽

Stress Tolerance ◽

Higher Plants ◽

Abiotic Stress Tolerance ◽

Physiological Role ◽

Antioxidant Metabolism

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Molecular mechanism of salicylic acid-induced abiotic stress tolerance in higher plants

Acta Physiologiae Plantarum ◽

10.1007/s11738-014-1603-z ◽

2014 ◽

Vol 36 (9) ◽

pp. 2287-2297 ◽

Cited By ~ 43

Author(s):

Guozhang Kang ◽

Gezi Li ◽

Tiancai Guo

Keyword(s):

Salicylic Acid ◽

Abiotic Stress ◽

Stress Tolerance ◽

Molecular Mechanism ◽

Higher Plants ◽

Abiotic Stress Tolerance

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Heterologous Expression of Three Ammopiptanthus mongolicus Dehydrin Genes Confers Abiotic Stress Tolerance in Arabidopsis thaliana

Plants ◽

10.3390/plants9020193 ◽

2020 ◽

Vol 9 (2) ◽

pp. 193

Author(s):

Hongwei Cui ◽

Yang Wang ◽

Tingqiao Yu ◽

Shaoliang Chen ◽

Yuzhen Chen ◽

...

Keyword(s):

Arabidopsis Thaliana ◽

Abiotic Stress ◽

Stress Tolerance ◽

Molecular Mechanisms ◽

Higher Plants ◽

Abiotic Stress Tolerance ◽

Ammopiptanthus Mongolicus ◽

Cold Environments ◽

Constitutive Overexpression ◽

Dehydrin Genes

Ammopiptanthus mongolicus, a xerophyte plant that belongs to the family Leguminosae, adapts to extremely arid, hot, and cold environments, making it an excellent woody plant to study the molecular mechanisms underlying abiotic stress tolerance. Three dehydrin genes, AmDHN132, AmDHN154, and AmDHN200 were cloned from abiotic stress treated A. mongolicus seedlings. Cytomembrane-located AmDHN200, nucleus-located AmDHN154, and cytoplasm and nucleus-located AmDHN132 were characterized by constitutive overexpression of their genes in Arabidopsis thaliana. Overexpression of AmDHN132, AmDHN154, and AmDHN200 in transgenic Arabidopsis improved salt, osmotic, and cold tolerances, with AmDHN132 having the largest effect, whereas the growth of transformed plants is not negatively affected. These results indicate that AmDHNs contribute to the abiotic stress tolerance of A. mongolicus and that AmDHN genes function differently in response to abiotic stresses. Furthermore, they have the potential to be used in the genetic engineering of stress tolerance in higher plants.

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