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 >
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