Degradation of MONOCULM 1 by APC/CTAD1 regulates rice tillering

Cao, Xu; Wang, Yonghong; Yu, Yanchun; Duan, Jingbo; Liao, Zihao; Xiong, Guosheng; Meng, Xiangbing; Liu, Guifu; Qian, Qian; Li, Jiayang

doi:10.1038/ncomms1743

Cited by 167 publications

(139 citation statements)

References 59 publications

(81 reference statements)

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“…4 G and E). Furthermore, the chain-length distributions in amylopectin exhibited a small increase in the abundance of branches with degrees of polymerization (DP) in the range 10-20 and a small decrease in chains with DP in the range [35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50] (Fig. S5).…”

Section: Discussionmentioning

confidence: 99%

Critical roles of soluble starch synthase SSIIIa and granule-bound starch synthase Waxy in synthesizing resistant starch in rice

Zhou

Wang

Liu

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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174

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Changes in human lifestyle and food consumption have resulted in a large increase in the incidence of type-2 diabetes, obesity, and colon disease, especially in Asia. These conditions are a growing threat to human health, but consumption of foods high in resistant starch (RS) can potentially reduce their incidence. Strategies to increase RS in rice are limited by a lack of knowledge of its molecular basis. Through map-based cloning of a RS locus in indica rice, we have identified a defective soluble starch synthase gene (SSIIIa) responsible for RS production and further showed that RS production is dependent on the high expression of the Waxy a (Wx a ) allele, which is prevalent in indica varieties. The resulting RS has modified granule structure; high amylose, lipid, and amylose-lipid complex; and altered physicochemical properties. This discovery provides an opportunity to increase RS content of cooked rice, especially in the indica varieties, which predominates in southern Asia.diabetes | resistant starch biosynthesis | soluble starch synthase | granule-bound starch synthase | amylose-lipid complex I ncreases in the incidence of type-2 diabetes are being observed throughout the world. This increase is thought to be due to changes in both diet and lifestyle (1, 2) and is increasingly apparent in Asia. Consumption of foods high in resistant starch (RS) can help to control type-2 diabetes, because its slow digestion and absorption by the small intestine decreases postprandial glucose and insulin responses (3). Foods high in RS also potentially protect against pathogen infection, diarrhea, inflammatory bowel disease, colon cancer, and chronic renal and hepatic diseases. Consumption of RS can increase satiety and reduce calorie intake to help weight management (3). Thus, improvement of the amounts and properties of RS in foods is an important goal.Rice (Oryza sativa L.) is consumed by more than half the world's population (4), and for many, it is the primary source of nutrients and carbohydrates for energy. Consumption of 18-20 g of RS (5, 6) is recommended per day for health benefits, but hot cooked rice typically contains <3% RS (7). Rice varieties or mutants with improved RS have been identified, such as Goami No. 2, Gongmi No. 3, RS111, and Jiangtangdao 1 (7-10).A high-RS, high-amylose transgenic rice line has been developed by suppressing the expression of starch branching enzymes (SBEs) (11) and a mutation of SBEIIb cosegregated with RS content in rice (8). In other cereals, down-regulation of soluble starch synthase (SS) SSIIa and of SBE results in greater RS in barley (12, 13) and wheat (14)(15)(16)(17)(18)(19)(20). Because the molecular basis underlying RS production is largely unknown, discovery of new RS genes is vital both for the elucidation of RS biosynthesis and for the breeding of high-RS varieties. We therefore screened a mutagenized population of the hybrid-rice restorer line R7954 for mutants with high RS in hot cooked rice. This strategy was designed to identify new RS genes of practical value ...

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Section: Discussionmentioning

confidence: 99%

Critical roles of soluble starch synthase SSIIIa and granule-bound starch synthase Waxy in synthesizing resistant starch in rice

Zhou

Wang

Liu

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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174

172

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“…Degradation of MOC1 through the coordinated action of TILLERING AND DWARF1 (TAD1), which encodes a co-activator of the anaphase-promoting complex (APC/C), and TILLER ENHANCER (TE), which encodes a substrate-recognition and binding factor of APC/C, reduces expression of the meristem identity gene OSH1 to regulate tillering in rice ( Fig. 2) (Li et al, 2003;Lin et al, 2012;Xu et al, 2012). Accordingly, moc1 mutants fail to produce tillers and exhibit only the mother culm, whereas mutations in TAD1 lead to an increase in tillering in rice.…”

Section: Factors That Control Branchingmentioning

confidence: 99%

“…Accordingly, moc1 mutants fail to produce tillers and exhibit only the mother culm, whereas mutations in TAD1 lead to an increase in tillering in rice. Furthermore, both MOC1 overexpressing transgenic rice and tad1 mutants have been shown to regulate plant height negatively (Li et al, 2003;Xu et al, 2012). This MOC1-TAD1 module in combination with the associated cell cycle machinery could thus potentially be used not only to optimize branching patterns in crop plants, but also to achieve a balance between plant height and branching (Fig.…”

Section: Factors That Control Branchingmentioning

confidence: 99%

Enhancing crop yield by optimizing plant developmental features

2016

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A number of plant features and traits, such as overall plant architecture, leaf structure and morphological features, vascular architecture and flowering time are important determinants of photosynthetic efficiency and hence the overall performance of crop plants. The optimization of such developmental traits thus has great potential to increase biomass and crop yield. Here, we provide a comprehensive review of these developmental traits in crop plants, summarizing their genetic regulation and highlighting the potential of manipulating these traits for crop improvement. We also briefly review the effects of domestication on the developmental features of crop plants. Finally, we discuss the potential of functional genomics-based approaches to optimize plant developmental traits to increase yield.

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“…Fageria (2014) had reported similar observations as well. Genes involved in controlling CN is also involved in the shoot branching and panicle branching (Lin, et al, 2012;Xu, et al, 2012). In PC4 of flowered accessions and PC1 of not-flowered accessions consisted of relationships between LiL and, CD.…”

Section: Association Of Evaluated Characters In Principal Component Amentioning

confidence: 99%

Development of a mini core collection from Sri Lankan traditional rice for flowering time variation

Rathnathunga¹,

Senanayake²,

Dissanayake³

et al. 2016

Aust J Crop Sci

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Sri Lankan traditional rice germplasm (Oryza sativa indica) consists of a wide variety of morphology and days to flowering (DF). The objective of this research was to develop a mini core collection representing the DF variation of the total collection. Three hundred and eighty four rice accessions from 53 Sri Lankan traditional rice varieties were evaluated for morphological and flowering time variation. The experiment was carried at Rice Research and Development Institute, Bathalagoda, Sri Lanka during the late short day season (Maha), 2012/2013.Three hundred and forty five accessions flowered and 39 accessions did not flower during the experimental period of 210 days. Two principal component analyses (PCA) were performed and subsequently 2 dendograms were developed for flowered and not flowered accessions. Sixty eight percent of total observed variation was explained through 6 principal components (PC's) by DF and fourteen quantitative morphological characters of 345 flowered accessions. Seventy nine percent of total observed variation of not flowered 39 accessions was explained through 4 PC's by 9 quantitative morphological characters. Ninety accessions were selected from 2 dendograms for development of a mini core collection; out of which 85 accessions represented flowered accessions based on minimum and maximum DF variation in each cluster of the dendogram. Five randomly selected accessions represented each cluster of not flowered accessions. Minimum and maximum DF values of both total collection and mini core collection were 56 and 189 days, respectively. Average DF of total flowered collection and mini core collection was 79.16 ± 0.95 and 87.95 ± 3.1, respectively. A similar trend in the regression relationship between DF and plant height and, DF and leaf length of the leaf prior to flag leaf was observed in total flowered collection and mini core collection, indicating the representation of mini core collection for flowering time variation.

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Degradation of MONOCULM 1 by APC/CTAD1 regulates rice tillering

Cited by 167 publications

References 59 publications

Critical roles of soluble starch synthase SSIIIa and granule-bound starch synthase Waxy in synthesizing resistant starch in rice

Critical roles of soluble starch synthase SSIIIa and granule-bound starch synthase Waxy in synthesizing resistant starch in rice

Enhancing crop yield by optimizing plant developmental features

Development of a mini core collection from Sri Lankan traditional rice for flowering time variation

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