Polyamines, both common and uncommon, under heat stress in rice (Oryza sativa) callus

Roy, Malabika Biswas; Ghosh, Bidyut

doi:10.1034/j.1399-3054.1996.980124.x

Cited by 18 publications

(18 citation statements)

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“…l), which is similar to the findings in rice, in which putrescine levels are not induced by salt stress (Krishnamurthy and Bhagwat, 1989). Conversely, putrescine biosynthesis was induced by many stresses, such as ozone (Langebartels et al, 1991;Scalet et al, 1995;Tuomainen et al, 1996), wounding (Yoza et al, 1996), osmotic stress (Flores and Galston, 1984), heat shock (Roy and Ghosh, 1996), oxygen deficiency (Reggiani et al, 1990), and K+ deficiency (Watson and Malmberg, 1996) in other species. Putrescine is known to specifically interact with proteins, nucleic acids, and membranes (Young and Galston, 1983).…”

Section: Discussionsupporting

confidence: 75%

“…increased levels of putrescine might either inhibit DNA methylation, permitting the expression of specific genes (Ruiz-Herrera et al, 1995;Martin-Tanguy et al, 1996), or affect gene expression by altering sequence-specific DNAprotein interactions (Burtin et al, 1991;Panagiotidis et al, 1995), or activate or modulate translocation of protein kinases such as CK2 in signal transduction (Shore et al, 1997).…”

Section: Discussionmentioning

confidence: 99%

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Constitutively Elevated Levels of Putrescine and Putrescine-Generating Enzymes Correlated with Oxidant Stress Resistance in Conyza bonariensis and Wheat

Muller

Zhang

et al. 1997

Plant Physiology

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Oxidant stress resistance in Conyza bonariensis and wheat (Triticum aestivum) has been correlated with high levels of antioxidant enzyme activities. Additionally, external oxidant stresses can increase a plant's levels of the enzymes of polyamine biosynthesis and polyamines, especially putrescine. We investigated the constitutive relationships between putrescine, putrescine-generating enzymes, and oxidant stress resistance in wheat and C. bonariensis. Putrescine was Constitutively elevated (2.5- to 5.7-fold) in 2-week-old-resistant wheat and C. bonariensis biotypes, which correlated with a 10- to 15-fold increase in paraquat oxidant resistance. Arginine and ornithine decarboxylase activities doubled, along with higher putrescine levels in resistant C. bonariensis. The variations in levels of putrescine and arginine and ornithine decarboxylase activities paralleled the constitutive variation of antioxidant enzymes, as well as oxidant resistance. Higher levels of both putrescine and antioxidant enzyme activities occurred during a peak of oxidant resistance at 10 weeks, when paraquat resistance in C. bonariensis plants is >50-fold greater than in the sensitive biotype. Application of 100 [mu]M putrescine can double oxidant-stress resistance in the resistant C. bonariensis. Putrescine may play an important role in contributing to the base level of oxidant resistance found at the nonpeak period.

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Section: Discussionsupporting

confidence: 75%

Section: Discussionmentioning

confidence: 99%

Constitutively Elevated Levels of Putrescine and Putrescine-Generating Enzymes Correlated with Oxidant Stress Resistance in Conyza bonariensis and Wheat

Muller

Zhang

et al. 1997

Plant Physiology

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“…It has been observed by several authors (Tiburcio et al 1986;Reggiani & Bertani 1989;Erdei et al 1996;Roy & Gosh 1996) that internal and external stimuli are associated with changes in polyamine content. These relationships focused attention on the role exerted by exogenous and endogenous polyamines as mediator molecules in the induction of a stress response in plant cells.…”

Section: Discussionmentioning

confidence: 99%

Dimethylthiourea, a hydrogen peroxide trap, partially prevents stress effects and ascorbate peroxidase increase in spermidine-treated maize roots

Zacchini¹,

Agazio²

2001

Plant Cell Environ

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“…In addition, they have been reported to have defensive role under abiotic stresses (Alcázar et al, 2006). Importantly, cellular level of PAs shows positive correlation with plant tolerance towards environmental stresses (Nada et al, 2004;He et al, 2002;Shen et al, 2000;Roy and Ghosh, 1996;Besford et al, 1993;Krishnamurthy and Bhagwat et al, 1989). Yiu et al (2008) reported Spd mediated higher activities of antioxidant enzymes in welsh onion (Allium fistulosum L.), under submerged condition.…”

Section: Introductionmentioning

confidence: 99%

Use of spermidine reduced the oxidative damage in onion seedlings under salinity by modulating antioxidants

Rohman¹,

Islam²,

Mohi-Ud-Din³

et al. 2017

Afr. J. Agric. Res.

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This research studies the role of spermidine (Spd) in conferring tolerance in onion seedlings under oxidative sress, caused by NaCl. Stress condition was applied on two months old onion seedlings by adding 10 gL -1 of NaCl, where 100 µM of Spd was sprayed twice daily before counting the stress duration. Under salinity stress, seedlings were observed for 7 days, and data were measured on relative leaf water, proline, reactive oxygen species (ROS), lipid peroxidation (as malondialdehyde, MDA), amine oxidases, enzymatic and non-enzymatic antioxidants in leaves. Salinity stress decreased the relative water content (RWC), where Spd application delayed the loss of RWC. Contrariwise, Spd increased the proline content in salinity stressed seedlings up to five days. Salinity increased the contents of superoxide (O 2•-), hydrogen peroxide (H 2 O 2 ) and MDA continuously and significantly with stress duration. More importantly, application of Spd decreased the ROS and MDA contents in stressed seedlings more effectively, up to three days of stress. Spd maintained higher activities of polyamine oxidase (PAO) and diamine oxidase (DAO) under salinity. Higher activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR) and glutathione reductase (GR) in presence of Spd over salinity during the study period, suggested their ROS scavenging role under salinity stress. Conversely, glutathione peroxidase (GPX) and dehydroascorbate reductase (DHAR) played important role in reducing the oxdative stress for 3 to 5 days. Spd also maintained higher reduced glutathione (GSH), ascorbic acid (ASA) and their redox homeostasis in leaves during the study period. Thus, Spd observably confirms better tolerance in short term salinity.Key words: Spermidine, oxidative damage, salinity, antioxidants, onion seedlings. INTRODUCTIONOnion is the most important spice crops in Banglaesh. However, the production of this crop is hampered in coastal soil of southern districts of Banladesh. Tidal flash of sea water increases soil salinity which is a major environmental stress affecting plants growth and productivity of the crop. In plants, salinity causes oxidative stress by producing reactive oxygen species (ROS) such as superoxide radicals (O 2•-), singlet oxygen (O 2 ), hydroxyl radicals (• OH) and H 2 O 2 (Hasegawa et al., 2000;Apel and Hirt, 2004). Higher ROS causes damage to cell organells like proteins, DNA, lipids, pigments and carbohydrates which ultimately lead to cell death (Apel and Hirt, 2004; Gill and Tujeta, 2010). Conversely, higher methylglyoxal (MG) production under salinity causes potential damage to the cell organells (Yadav et al., 2005a, b). Hence, higher concentration of ROS and MG under stress is essentially needed to be reduced in cell, to survive and grow.To survive under such situation, plants hold antioxidant system in cell to reduce the oxidative damage by ROS (Gill and Tujeta, 2010). Plants have both enzymatic and non-enzymatic antioxidants which take part in scavenging of ROS produ...

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Polyamines, both common and uncommon, under heat stress in rice (Oryza sativa) callus

Cited by 18 publications

References 0 publications

Constitutively Elevated Levels of Putrescine and Putrescine-Generating Enzymes Correlated with Oxidant Stress Resistance in Conyza bonariensis and Wheat

Constitutively Elevated Levels of Putrescine and Putrescine-Generating Enzymes Correlated with Oxidant Stress Resistance in Conyza bonariensis and Wheat

Dimethylthiourea, a hydrogen peroxide trap, partially prevents stress effects and ascorbate peroxidase increase in spermidine-treated maize roots

Use of spermidine reduced the oxidative damage in onion seedlings under salinity by modulating antioxidants

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