Simaskova, Maria and Daneva, Anna and Doll, Nicolas and Schilling, Neeltje and Cubria-Radio, Marta and Zhou, Liangzi and De Winter, Freya and Aesaert, Stijn and De Rycke, Riet and Pauwels, Laurens and Dresselhaus, Thomas and Brugiere, Norbert and Simmons, Carl R. and Habben, Jeffrey E. and Nowack, Moritz K. (2022) KIL1 terminates fertility in maize by controlling silk senescence. PLANT CELL, 34 (8). pp. 2852-2870. ISSN 1040-4651, 1532-298X
Full text not available from this repository. (Request a copy)Abstract
Plant flowers have a functional life span during which pollination and fertilization occur to ensure seed and fruit development. Once flower senescence is initiated, the potential to set seed or fruit is irrevocably lost. In maize, silk strands are the elongated floral stigmas that emerge from the husk-enveloped inflorescence to intercept airborne pollen. Here we show that KIRA1-LIKE1 (KIL1), an ortholog of the Arabidopsis NAC (NAM (NO APICAL MERISTEM), ATAF1/2 (Arabidopsis thaliana Activation Factor1 and 2) and CUC (CUP-SHAPED COTYLEDON 2)) transcription factor KIRA1, promotes senescence and programmed cell death (PCD) in the silk strand base, ending the window of accessibility for fertilization of the ovary. Loss of KIL1 function extends silk receptivity and thus strongly increases kernel yield following late pollination. This phenotype offers new opportunities for possibly improving yield stability in cereal crops. Moreover, despite diverging flower morphologies and the substantial evolutionary distance between Arabidopsis and maize, our data indicate remarkably similar principles in terminating floral receptivity by PCD, whose modulation offers the potential to be widely used in agriculture. The maize NAC transcription factor KIL1 terminates the fertility of female flowers maize ears by promoting programmed cell death in senescing silk strands.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PROGRAMMED CELL-DEATH; POLLINATION; RECEPTIVITY; GROWTH; GENES; EXPRESSION; INFECTION; GUIDANCE; INTERVAL; TISSUE |
| Subjects: | 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Lehrstuhl für Zellbiologie und Pflanzenphysiologie (Prof. Dr. Klaus Grasser) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 16 Feb 2024 11:00 |
| Last Modified: | 16 Feb 2024 11:00 |
| URI: | https://pred.uni-regensburg.de/id/eprint/58111 |
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