BEAK LIKE SPIKELET1 is Required for Lateral Development of Lemma and Palea in Rice

Ma, Xiaoding; Cheng, Zhijun; Wu, Fuqing; Jin, Mingna; Li-guo, Zhang; Zhang, Feng; Wang, Jiulin; Zhou, Kunneng; Ma, Jing; Lin, Qian; Lei, Cailin; Wan, Jianmin

doi:10.1007/s11105-012-0480-0

Cited by 19 publications

(23 citation statements)

References 66 publications

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“…The width of the lemma was reduced in th1-6569, as for other alleles (Li et al, 2012;Ma et al, 2013). Our results suggest that the spatial distribution of tubercles is not affected by the th1 mutation (Fig.…”

Section: Discussionsupporting

confidence: 59%

“…TH1 is associated with structural features of the epidermal surface and lateral growth of the lemma and palea, as described here (Figs. 1 and 2) and in previous works (Li et al, 2012;Ma et al, 2013). Thus, the function of ALOG genes may be closely associated with the developmental programs of inflorescences and spikelets in rice.…”

Section: Discussionmentioning

confidence: 53%

“…Sequence analyses revealed that the ng6569 line had a mutation in TH1, the loss-of-function of which was reported to result in a similar spikelet phenotype to that observed in ng6569 (Li et al, 2012). A similar mutant, which has a mutation in TH1 and is named BEAK LIKE SPIKELET1 (BLS1), has been reported (Ma et al, 2013). To unify the gene nomenclature, we referred to our mutant as an allele of th1 (th1-6569), considering the priority of TH1 in the literature.…”

Section: Discussionmentioning

confidence: 88%

“…The ALOG domain is distributed throughout land plants and is highly conserved . Although little is known about the ALOG family in Arabidopsis, recent reports have demonstrated that ALOG family genes play important roles in rice (Li et al, 2012;Ma et al, 2013;Yoshida et al, , 2013. As described above, a founding member of the ALOG family, G1, specifies sterile lemma identity by repressing lemma characteristics.…”

Section: Discussionmentioning

confidence: 99%

“…The spatial expression patterns of TH1 were previously studied using promoter-GUS analysis (Li et al, 2012;Ma et al, 2013). Because these analyses showed the localization of GUS reporter activity only after the completion of spikelet development, TH1 expression during spikelet development and its detailed spatial distribution in organ primordia remained to be elucidated.…”

Section: Discussionmentioning

confidence: 99%

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A role for <i>TRIANGULAR HULL1</i> in fine-tuning spikelet morphogenesis in rice

et al. 2014

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The lemma and palea, which enclose the pistil, stamens, and lodicules, are the most conspicuous organs in the rice spikelet. We isolated a mutant line (ng6569) in which the lemma and palea were narrower than those of the wild type, and found that the mutant had a defect in TRIANGULAR HULL1 (TH1), which encodes a nuclear protein with an ALOG domain. Detailed morphological analysis indicated that the th1 mutation caused a reduction in the size of tubercles, which are convex structures on the surface of the lemma and palea. This reduction was more pronounced in the apical region of the lemma than in the basal region, resulting in the formation of a beak-like spikelet. By contrast, the number of tubercle rows and their spatial distribution on the lemma were not affected in the th1 mutant. Thus, the TH1 gene seems to be involved in fine-tuning the morphogenesis of the lemma and palea. In situ hybridization analysis revealed that TH1 was highly expressed in the primordia of the lemma and palea, but only weakly expressed in the primordia of the sterile lemma and rudimentary glume. We then examined the effect of th1 mutation on the lemma-like structure formed in the long sterile lemma/glume1 (g1) and extra glume1 (eg1) mutants. The result showed that the th1 mutation strongly affected the morphology of the extra lemma of eg1, but had no significant effect on the transformed lemma of g1.

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Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 53%