The abstract is read at the publisher; the summary is JClub's.
Phosphorylation of MxME3-7 at S201 by MxMPK4-1 in apple rootstocks boosts ROS signaling, strengthening adaptation to Fe deficiency stress.
- Why it matters: Iron-limited soils trigger Fe-deficiency responses, but how MAPK signaling and malate metabolism coordinate ROS signaling in apple remains unclear.
- What they did: Metabolomics compared Fe-efficient Malus xiaojinensis and Fe-inefficient Malus baccata rootstocks, then identified MxME3-7 as a Fe-responsive NADP-malic enzyme interacting with and phosphorylated by MxMPK4-1.
- The result: S201 phosphorylation significantly enhances ROS signaling levels, supporting a ROS-mediated mechanism that improves Fe-deficiency adaptation in apple rootstocks.
The findingWhy it mattersWhat they didThe result
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