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Int. J. Mol. Sci. 2016, 17(5), 794; doi:10.3390/ijms17050794

Gibberellic Acid: A Key Phytohormone for Spikelet Fertility in Rice Grain Production

1
Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Korea
2
Crop Biotechnology Institute, GreenBio Science and Technology, Seoul National University, Pyeongchang 232-916, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Ute Roessner
Received: 8 April 2016 / Revised: 14 May 2016 / Accepted: 19 May 2016 / Published: 23 May 2016
(This article belongs to the Special Issue Metabolomics in the Plant Sciences)
View Full-Text   |   Download PDF [1007 KB, uploaded 23 May 2016]   |  

Abstract

The phytohormone gibberellic acid (GA) has essential signaling functions in multiple processes during plant development. In the “Green Revolution”, breeders developed high-yield rice cultivars that exhibited both semi-dwarfism and altered GA responses, thus improving grain production. Most studies of GA have concentrated on germination and cell elongation, but GA also has a pivotal role in floral organ development, particularly in stamen/anther formation. In rice, GA signaling plays an important role in spikelet fertility; however, the molecular genetic and biochemical mechanisms of GA in male fertility remain largely unknown. Here, we review recent progress in understanding the network of GA signaling and its connection with spikelet fertility, which is tightly associated with grain productivity in cereal crops. View Full-Text
Keywords: gibberellin signaling; rice; stamen/anther development; spikelet fertility; grain productivity gibberellin signaling; rice; stamen/anther development; spikelet fertility; grain productivity
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Kwon, C.-T.; Paek, N.-C. Gibberellic Acid: A Key Phytohormone for Spikelet Fertility in Rice Grain Production. Int. J. Mol. Sci. 2016, 17, 794.

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