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Oryza sativa delay of the onset of senescence (OsDOS), encodes a transcription factor that is shown to play a role in repressing jasmonic acid mediated signaling pathway resulting in leaf senescence delay, likely to play a role in panicle development and pollination/fertilization process (PMID: 16778011). The expression of OsDOS was down-regulated during natural leaf senescence, panicle development, and pollination, although its transcripts were accumulated in various organs. RNAi knockdown of OsDOS caused an accelerated age-dependent leaf senescence, whereas its overexpression produced a marked delay of leaf senescence, suggesting that it acts as a negative regulator for leaf senescence (PMID: 16778011). The barley homolog HORVU.MOREX.r3.3HG0236540 is shown to be up-regulated in the roots of egt2 mutant compared to wild-type (Kirschner et al., 2021; PMID: 34446550). Thus, it is a down-regulated target of the EGT2 in roots.
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