The involvement of Ca2+ signalling in Brassica self-incompatibility has been a contentious topic. New evidence suggests that stigmas use Ca2+ to signal to incompatible pollen to prevent pollen hydration and self-seed set. Moreover, this may involve a glutamate receptor.
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Franklin-Tong, N. Self-incompatibility: Calcium signalling in Brassica. Nature Plants 1, 15129 (2015). https://doi.org/10.1038/nplants.2015.129
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DOI: https://doi.org/10.1038/nplants.2015.129
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