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OsMATE7‐mediated flavonol accumulation regulates pollen tube growth in rice

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Research demonstrates that OsMATE7 regulates flavonol levels affecting pollen tube growth in rice, implying a link to male sterility.

Mutation of osm7 resulted in significant male sterility due to impaired pollen tube growth.
Reciprocal crosses indicated reduced seed setting rates in the osm7 knockout compared to wild-type rice.
Functional analysis confirmed osm7 as a transporter facilitating flavonol accumulation, essential for pollen tube development.
Flavonol deficiency in mutant pollen grains inhibited α-amylase activity, blocking essential starch hydrolysis.

Fan et al. (2025) studied this question.

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