ELE restrains empty glumes from developing into lemmas

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

doi:10.1016/s1673-8527(09)60029-1

Cited by 49 publications

(57 citation statements)

References 51 publications

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“…As expected, the B-class gene MADS2 was expressed in the ectopic lodicules but not in the palea-like primordium where DL remained expressed (see Supplemental Figure 2L online). Using in situ hybridization experiments, we also investigated the expression of G1/ELE, which is a specific marker for the sterile lemmas and palea that is not expressed in the lemma Hong et al, 2010). G1 is initially highly expressed in the sterile lemmas and palea primordia, and subsequently its expression gradually fades during the development of these floral organs ( Figure 1W).…”

Section: Mads3 and Mads58 Redundantly Regulate Reproductive Organ Idementioning

confidence: 99%

Functional Analysis of All AGAMOUS Subfamily Members in Rice Reveals Their Roles in Reproductive Organ Identity Determination and Meristem Determinacy

et al. 2011

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Reproductive organ development is one of the most important steps in the life cycle of plants. Studies using core eudicot species like thale cress (Arabidopsis thaliana) and snapdragon (Antirrhinum majus) have shown that MADS domain transcription factors belonging to the AGAMOUS (AG) subfamily regulate the identity of stamens, carpels, and ovules and that they are important for floral meristem determinacy. Here, we investigate the genetic interactions between the four rice (Oryza sativa) AG subfamily members, MADS3, MADS13, MADS21, and MADS58. Our data show that, in contrast with previous reports, MADS3 and MADS58 determine stamen and carpel identity and, together with MADS13, are important for floral meristem determinacy. In the mads3 mads58 double mutant, we observed a complete loss of reproductive organ identity and massive accumulation of lodicules in the third and fourth floral whorls. MADS21 is an AGL11 lineage gene whose expression is not restricted to ovules. Instead, its expression profile is similar to those of class C genes. However, our genetic analysis shows that MADS21 has no function in stamen, carpel, or ovule identity determination.

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Section: Mads3 and Mads58 Redundantly Regulate Reproductive Organ Idementioning

confidence: 99%

Functional Analysis of All AGAMOUS Subfamily Members in Rice Reveals Their Roles in Reproductive Organ Identity Determination and Meristem Determinacy

et al. 2011

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“…Real-time PCR assay was conducted as described (Hong et al, 2010). Total RNA was extracted from the leaf, root, and panicle of Zhongxian 3037 and panicles of brk1 mutants.…”

Section: Real-time Pcr Expression Assaymentioning

confidence: 99%

BRK1, a Bub1-Related Kinase, Is Essential for Generating Proper Tension between Homologous Kinetochores at Metaphase I of Rice Meiosis

et al. 2012

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Bub1 (for budding uninhibited by benzimidazole 1), one of the main spindle checkpoint kinases, acts as a kinetochore scaffold for assembling other checkpoint proteins. Here, we identify a plant Bub1-related kinase 1 (BRK1) in rice (Oryza sativa). The brk1 mutants are sterile due to the precocious separation of sister chromatids at the onset of anaphase I. The centromeric recruitment of SHUGOSHIN1 and phosphorylation of histone H2A at Thr-134 (H2A-pT134) depend on BRK1. Although the homologs can faithfully separate from each other at the end of meiosis I, the uncorrected merotelic attachment of paired sister kinetochores at the early stage of metaphase I in brk1 reduces the tension across homologous kinetochores, causes the metaphase I spindle to be aberrantly shaped, and subsequently affects the synchronicity of homolog separation at the onset of anaphase I. In addition, the phosphorylation of inner centromeric histone H3 at Ser-10 (H3-pS10) during diakinesis depends on BRK1. Therefore, we speculate that BRK1 may be required for normal localization of Aurora kinase before the onset of metaphase I, which is responsible for correcting the merotelic attachment.

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“…In most members of Oryzeae, the spikelet is distinct from those of other grasses, in that it comprises a pair of rudimentary glumes, a pair of sterile lemmas (empty glumes), and one floret (Schmidt and Ambrose, 1998;Ambrose et al, 2000;Kellogg, 2009;Hong et al, 2010). The rudimentary glumes are generally regarded as severely reduced bract organs, but the origin of sterile lemmas has been widely debated.…”

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confidence: 99%

“…The gene LONG STERILE LEMMA (G1)/ELONGATED EMPTY GLUME1 (ELE1) is a member of a plant-specific gene family. In the g1/ele1 mutant, sterile lemmas were found to be homeotically transformed into lemmas Hong et al, 2010). The OsMADS34 and EXTRA GLUME1 (EG1) genes were also shown to determine the identities of sterile lemmas.…”

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confidence: 99%

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MULTI-FLORET SPIKELET1, Which Encodes an AP2/ERF Protein, Determines Spikelet Meristem Fate and Sterile Lemma Identity in Rice

et al. 2013

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The spikelet is a unique inflorescence structure of grass. The molecular mechanism that controls the development of the spikelet remains unclear. In this study, we identified a rice (Oryza sativa) spikelet mutant, multi-floret spikelet1 (mfs1), that showed delayed transformation of spikelet meristems to floral meristems, which resulted in an extra hull-like organ and an elongated rachilla. In addition, the sterile lemma was homeotically converted to the rudimentary glume and the body of the palea was degenerated in mfs1. These results suggest that the MULTI-FLORET SPIKELET1 (MFS1) gene plays an important role in the regulation of spikelet meristem determinacy and floral organ identity. MFS1 belongs to an unknown function clade in the APETALA2/ ethylene-responsive factor (AP2/ERF) family. The MFS1-green fluorescent protein fusion protein is localized in the nucleus. MFS1 messenger RNA is expressed in various tissues, especially in the spikelet and floral meristems. Furthermore, our findings suggest that MFS1 positively regulates the expression of LONG STERILE LEMMA and the INDETERMINATE SPIKELET1 (IDS1)-like genes SUPERNUMERARY BRACT and OsIDS1.

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ELE restrains empty glumes from developing into lemmas

Cited by 49 publications

References 51 publications

Functional Analysis of All AGAMOUS Subfamily Members in Rice Reveals Their Roles in Reproductive Organ Identity Determination and Meristem Determinacy

Functional Analysis of All AGAMOUS Subfamily Members in Rice Reveals Their Roles in Reproductive Organ Identity Determination and Meristem Determinacy

BRK1, a Bub1-Related Kinase, Is Essential for Generating Proper Tension between Homologous Kinetochores at Metaphase I of Rice Meiosis

MULTI-FLORET SPIKELET1, Which Encodes an AP2/ERF Protein, Determines Spikelet Meristem Fate and Sterile Lemma Identity in Rice

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