Plant & Cell Physiology
2021 vol62 (11)
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The phytohormone abscisic acid (ABA) acts in a variety of signaling pathways to regulate adaptive stress responses and development. While ABA signaling pathways have been mostly studied in rice and Arabidopsis, they are less well understood in other species. Wang et al. (on pp. 1760-1769) characterised the role of Protein Phosphatase 2C (PP2C) genes in tomato, which are known key components of plant ABA signalling pathways, and determined that tomato SlPP2C5 negatively regulates ABA signaling, specifically impacting on fruit development and ripening onset.
The cover image shows fruit ripening onset from 15 (far left) to 42 days (far right) after fertilisation in WT tomatoes (top) compared with SlPP2C5- RNAi-1/2 lines (second and third from top, respectively) and >SlPP2C5-OE-1/2 lines (second from bottom and bottom, respectively). Image supplied by Ping Leng (China Agricultural University – College of Horticulture, Beijing, China).
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