Abstract:
Lipoxygenase (LOX) is a key enzyme in fatty acid metabolism of plant and plays multiple roles in development and stress responses. The identification and analysis of LOX family members in tobacco can provide a theoretical basis for tobacco resistance breeding. In the current study, a total of 18 LOX family members were identified in tobacco, and 12 of those were anchored on chromosomes successfully. The phylogenetic analysis revealed that the newly identified tobacco LOX family members could be divided in 2 subgroups (9-LOX and 13-LOX). And then, LOX members in the 13-LOX subgroup could be classified in two different types (Type I and Type II). The syntenic analysis revealed that there were two homologous gene pairs between Arabidopsis and tobacco, and they shared similar expression patterns. Notably, the expression pattern analysis indicated that the
NtLOX genes expression patterns were different in tested tissues, while several
NtLOX genes could be induced by wounding and MeJA treatments, such as
NtLOX06. Therefore, LOX family members in tobacco may play a significant role in the process of plant stress response.
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