ELE restrains empty glumes from developing into lemmas

Lilan Hong; Qian Qian; Keming Zhu; Ding Tang; Zejun Huang; Ling Gao; Ming Li; Minghong Gu; Zhukuan Cheng

doi:10.1016/S1673-8527(09)60029-1

Volume 37 Issue 2

Feb. 2010

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Abstract

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Article Navigation > Journal of Genetics and Genomics > 2010 > 37(2): 101-115

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ELE restrains empty glumes from developing into lemmas

doi: 10.1016/S1673-8527(09)60029-1

a
State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
b
State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
c
Key Laboratory of Crop Genetics and Physiology of Jiangsu Province/Key Laboratory of Plant Functional Genomics of Ministry of Education, Yangzhou University, Yangzhou 225009, China

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Corresponding author: E-mail address: zkcheng@genetics.ac.cn (Zhukuan Cheng)
Received Date: 2009-12-27
Accepted Date: 2010-01-18
Rev Recd Date: 2010-01-18

Available Online: 2010-03-18

Publish Date: 2010-02-20

Abstract

Abstract

Although there is evident homology among reproductive organs when comparing Poaceae (grass) and eudicots, the identity of grass specific organs, such as lodicules, palea, lemma, and glumes has been the subject of a vast and largely inconclusive discussion. Here we provide some direct evidence to support the idea that the empty glumes of rice (Oryza sativa) are counterparts of lemmas. We show that the development of empty glumes is regulated by (), which belongs to a plant specific novel gene family. Mutations at the ELE locus cause elongated empty glumes, which mimic the lemmas and have the epidermal morphology of lemmas with four or five vascular bundles. As a nuclear-localized gene, ELE is specifically expressed at the empty glumes of immature spikelets, and its ectopic expression causes many floral development defects, including lemma-like palea, extra palea-like structures, elongated lodicules, extra stamens and stigmas. Our result suggests that empty glumes are lemmas of the sterile florets located at the lateral side of the rice spikelet, and ELE acts as a regulator restraining its growth to maintain its small size in wild-type plants.
- empty glumes,
- lemmas,
- ELE,
- rice

These authors contributed equally to this work

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References(53)

References

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