Slow Development Restores the Fertility of Photoperiod-Sensitive Male-Sterile Plant Lines.

Plant Physiol

Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China

Published: October 2020

Photoperiod- and thermosensitive genic male sterility (P/TGMS) lines are widely used in crop breeding. The fertility conversion of Arabidopsis () TGMS lines including , which is defective in callose wall formation, relies on slow development under low temperatures. In this study, we discovered that also exhibits PGMS. Fertility of was restored when pollen development was slowed under short-day photoperiods or low light intensity, suggesting that slow development restores the fertility of 2 under these conditions. We found that several other TGMS lines with defects in pollen wall formation also exhibited PGMS characteristics. This similarity indicates that slow development is a general mechanism of PGMS fertility restoration. Notably, slow development also underlies the fertility recovery of TGMS lines. Further analysis revealed the pollen wall features during the formation of functional pollens of these P/TGMS lines under permissive conditions. We conclude that slow development is a general mechanism for fertility restoration of P/TGMS lines and allows these plants to take different strategies to overcome pollen formation defects.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7536676PMC
http://dx.doi.org/10.1104/pp.20.00951DOI Listing

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