Wenjie Wei, Yulan Hu, Wenjuan Yang, Xiaoli Li, Jiali Wei, Xiangyang Hu, Ping Li^*

Phyton-International Journal of Experimental Botany, Vol.90, No.4, pp. 1075-1087, 2021, DOI:10.32604/phyton.2021.016134

Abstract Seed germination or dormancy status is strictly controlled by endogenous phytohormone and exogenous environment signals. Abscisic acid (ABA) is the important phytohormone to suppress seed germination. Ambient high temperature (HT) also suppressed seed germination, or called as secondary seed dormancy, through upregulating ABI5, the essential component of ABA signal pathway. Previous result shows that appropriate nitric oxide (NO) breaks seed dormancy through triggering S-nitrosoglutathion reductase (GSNOR1)-dependent S-nitrosylation modification of ABI5 protein, subsequently inducing the degradation of ABI5. Here we found that HT induced the degradation of GSNOR1 protein and reduced its activity, thus accumulated more reactive nitrogen species (RNS) to… More >

Darío E. IGLESIAS^*, Silvina S. BOMBICINO, Alberto BOVERIS, Laura B. VALDEZ

BIOCELL, Vol.40, No.1, pp. 27-30, 2016, DOI:10.32604/biocell.2016.40.027

Abstract Complex III plays a central role in the mitochondrial respiratory chain transferring electrons from ubiquinol to cytochrome c and pumping protons to the intermembrane space, contributing to the protonmotive force. Furthermore, complex III can act as a source of O₂ •- in the presence of ubiquinol and antimycin, an expermiental condition in which the oxidation of the cytochrome b hemes is blocked. The O₂ •- dismutation catalyzed by superoxide dismutase produces H₂O₂, a known second messenger in redox signalling. Results from our laboratory have shown that NO, released from GSNO or from SPER -NO or generated by mtNOS, inhibits electron… More >