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Role of nitric oxide in abscisic acid-induced subcellular antioxidant defense of maize leaves.

Abstract

The sources of nitric oxide (NO) production in response to abscisic acid (ABA) and the role of NO in ABA-induced hydrogen peroxide (H(2)O(2)) accumulation and subcellular antioxidant defense in leaves of maize (Zea mays L.) plants were investigated. ABA induced increases in generation of NO and activity of nitric oxide synthase (NOS) in maize leaves. Such increases were blocked by pretreatment with each of the two NOS inhibitors. Pretreatments with a NO scavenger or NR inhibitors inhibited ABA-induced increase in production of NO, but did not affect the ABA-induced increases in activity of NOS, indicating that ABA-induced NO production originated from sources of NOS and NR. ABA- and H(2)O(2)-induced increases in expression of the antioxidant genes superoxide dismutase 4 (SOD4), cytosolic ascorbate peroxidase (cAPX), and glutathione reductase 1 (GR1) and the activities of the chloroplastic and cytosolic antioxidant enzymes were arrested by pretreatments with the NO scavenger, inhibitors of NOS and NR, indicating that NO is involved in the ABA- and H(2)O(2)-induced subcellular antioxidant defense reactions. On the other hand, NO donor sodium nitroprusside (SNP) reduced accumulation of H(2)O(2) induced by ABA, and c-PTIO reversed the effect of SNP in decreasing the accumulation of H(2)O(2). SNP induced increases in activities of subcellular antioxidant enzymes, and the increases were substantially prevented from occurring by the pretreatment with c-PTIO. These results suggest that ABA induces production of H(2)O(2) and NO, which can up-regulate activities of the subcellular antioxidant enzymes, to prevent overproduction of H(2)O(2) in maize plants. There is a negative feedback loop between NO and H(2)O(2) in ABA signal transduction in maize plants.

Authors+Show Affiliations

College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18349510

Citation

Sang, Jian-Rong, et al. "Role of Nitric Oxide in Abscisic Acid-induced Subcellular Antioxidant Defense of Maize Leaves." Zhi Wu Sheng Li Yu Fen Zi Sheng Wu Xue Xue Bao = Journal of Plant Physiology and Molecular Biology, vol. 33, no. 6, 2007, pp. 553-66.
Sang JR, Jiang MY, Lin F, et al. Role of nitric oxide in abscisic acid-induced subcellular antioxidant defense of maize leaves. Zhi Wu Sheng Li Yu Fen Zi Sheng Wu Xue Xue Bao. 2007;33(6):553-66.
Sang, J. R., Jiang, M. Y., Lin, F., Li, J., & Xu, S. C. (2007). Role of nitric oxide in abscisic acid-induced subcellular antioxidant defense of maize leaves. Zhi Wu Sheng Li Yu Fen Zi Sheng Wu Xue Xue Bao = Journal of Plant Physiology and Molecular Biology, 33(6), 553-66.
Sang JR, et al. Role of Nitric Oxide in Abscisic Acid-induced Subcellular Antioxidant Defense of Maize Leaves. Zhi Wu Sheng Li Yu Fen Zi Sheng Wu Xue Xue Bao. 2007;33(6):553-66. PubMed PMID: 18349510.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Role of nitric oxide in abscisic acid-induced subcellular antioxidant defense of maize leaves. AU - Sang,Jian-Rong, AU - Jiang,Ming-Yi, AU - Lin,Fan, AU - Li,Jing, AU - Xu,Shu-Cheng, PY - 2008/3/20/pubmed PY - 2009/3/20/medline PY - 2008/3/20/entrez SP - 553 EP - 66 JF - Zhi wu sheng li yu fen zi sheng wu xue xue bao = Journal of plant physiology and molecular biology JO - Zhi Wu Sheng Li Yu Fen Zi Sheng Wu Xue Xue Bao VL - 33 IS - 6 N2 - The sources of nitric oxide (NO) production in response to abscisic acid (ABA) and the role of NO in ABA-induced hydrogen peroxide (H(2)O(2)) accumulation and subcellular antioxidant defense in leaves of maize (Zea mays L.) plants were investigated. ABA induced increases in generation of NO and activity of nitric oxide synthase (NOS) in maize leaves. Such increases were blocked by pretreatment with each of the two NOS inhibitors. Pretreatments with a NO scavenger or NR inhibitors inhibited ABA-induced increase in production of NO, but did not affect the ABA-induced increases in activity of NOS, indicating that ABA-induced NO production originated from sources of NOS and NR. ABA- and H(2)O(2)-induced increases in expression of the antioxidant genes superoxide dismutase 4 (SOD4), cytosolic ascorbate peroxidase (cAPX), and glutathione reductase 1 (GR1) and the activities of the chloroplastic and cytosolic antioxidant enzymes were arrested by pretreatments with the NO scavenger, inhibitors of NOS and NR, indicating that NO is involved in the ABA- and H(2)O(2)-induced subcellular antioxidant defense reactions. On the other hand, NO donor sodium nitroprusside (SNP) reduced accumulation of H(2)O(2) induced by ABA, and c-PTIO reversed the effect of SNP in decreasing the accumulation of H(2)O(2). SNP induced increases in activities of subcellular antioxidant enzymes, and the increases were substantially prevented from occurring by the pretreatment with c-PTIO. These results suggest that ABA induces production of H(2)O(2) and NO, which can up-regulate activities of the subcellular antioxidant enzymes, to prevent overproduction of H(2)O(2) in maize plants. There is a negative feedback loop between NO and H(2)O(2) in ABA signal transduction in maize plants. SN - 1671-3877 UR - https://www.unboundmedicine.com/medline/citation/18349510/Role_of_nitric_oxide_in_abscisic_acid_induced_subcellular_antioxidant_defense_of_maize_leaves_ DB - PRIME DP - Unbound Medicine ER -