The MADS domain transcription factor AGAMOUS-LIKE 15 suppresses resistance against
Chu TG, Li WK, Zhao YW, Wang HC, Han PL
Plant Signaling
Apple trees in backyard orchards and community food forests spend enormous energy fending off fungal rot each season; understanding that a single developmental gene is essentially telling the tree to stand down against infection points toward varieties that could need far fewer fungicide sprays.
Inside every apple tree, there's a protein called AGL15 that normally helps direct how flowers and fruits form. Scientists discovered it also has a second job: suppressing the tree's immune response to harmful fungi. When AGL15 is active, it's like it's telling the immune system to stay quiet, making the tree more vulnerable to fungal disease. This finding suggests that breeding or engineering apple trees with less AGL15 activity could produce trees that are naturally better at fighting off fungal infections.
Key Findings
The MADS-domain transcription factor AGL15 functions as a negative regulator of apple immune responses to pathogenic fungi, suppressing resistance rather than promoting it.
MADS-box genes, long studied as master regulators of floral and fruit development, are now implicated in pathogen defense pathways, expanding the known functional scope of this large gene family in plants.
Apple (Malus domestica) was the study system, making findings directly relevant to a globally important tree fruit crop that suffers significant losses annually from fungal pathogens.
chevron_right Technical Summary
A gene called AGL15 — previously known mainly for controlling apple flower and fruit development — turns out to actively shut down the tree's defenses against fungal infection. Silencing or reducing this gene's activity could open a path to apples that fight off fungal disease on their own.
Abstract Preview
AGL (AGAMOUS-LIKE) transcription factors are key regulators of plant growth and development, but their function in plant defense against pathogenic fungi is less studied. Apple ( The online version...
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An apple is the round, edible fruit of an apple tree. Fruit trees of the orchard or domestic apple, the most widely grown in the genus, are cultivated worldwide. The tree originated in Central Asia, where its wild ancestor, Malus sieversii, is still found. Apples have been grown for thousands of ...