A Strigolactone Biosynthesis Gene Contributed to the Green Revolution in Rice

Wang, Yuexing; Shang, Lianguang; Yu, Hong; Zeng, Longjun; Hu, Jiang; Ni, Shen; Rao, Yuchun; Liu, Sanfeng; Chu, Jinfang; Meng, Xiangbing; Wang, Lei; Hu, Peisong; Yan, Jijun; Kang, Shujing; Qu, Minghao; Lin, Hai; Wang, Tao; Wang, Quan; Hu, Xueyuan; Chen, Hongqi; Wang, Bing; Gao, Zhenyu; Guo, Longbiao; Zeng, Dali; Zhu, Xudong; Xiong, Guosheng; Li, Jiayang; Qian, Qian

doi:10.1016/j.molp.2020.03.009

Cited by 110 publications

(77 citation statements)

References 44 publications

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“…Because green revolution cereal varieties require a high inorganic fertilizer supply to sustain the maximum yield potential, resulting in serious environmental degradation, the strategy, with enhanced tillering in high-density planting, has been proposed to effectively sustain the high yield of green revolution varieties. Therefore, manipulation of LJ formation and dynamics is a key strategy to increase green revolution yields by controlling population density ( Tian et al., 2019 ; Wang et al., 2020 ; Wu et al., 2020 ). In this study, we provided evidence that grain yield in rice with erect leaves generally enhanced by dense planting is primarily due to a smaller reduction in tiller number than that in the wild-type.…”

Section: Discussionmentioning

confidence: 99%

Spatiotemporal Resolved Leaf Angle Establishment Improves Rice Grain Yield via Controlling Population Density

Wang

Liu

et al. 2020

iScience

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Summary Leaf angle is mainly determined by the lamina joint (LJ) and contributes to ideal crop architecture for high yield. Here, we dissected five successive stages with distinct cytological features of LJs spanning organogenesis to leaf angle formation and obtained the underlying stage-specific mRNAs and small RNAs, which well explained the cytological dynamics during LJ organogenesis and leaf angle plasticity. Combining the gene coexpression correlation with high-throughput promoter analysis, we identified a set of transcription factors (TFs) determining the stage- and/or cytological structure-specific profiles. The functional studies of these TFs demonstrated that cytological dynamics determined leaf angle and that the knockout rice of these TFs with erect leaves significantly enhanced yield by maintaining the proper tiller number under dense planting. This work revealed the high-resolution mechanisms of how the cytological dynamics of LJ determined leaf erectness and served as a valuable resource to remodel rice architecture for high yield by controlling population density.

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Section: Discussionmentioning

confidence: 99%

Spatiotemporal Resolved Leaf Angle Establishment Improves Rice Grain Yield via Controlling Population Density

Wang

Liu

et al. 2020

iScience

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“…GA signaling triggers the degradation of SLENDER RICE1 (SLR1), leading to degradation of MONOCULM1 (MOC1) and hence repression of axillary bud formation, so that the ''green revolution'' GA-deficient or signaling mutants are both semidwarf and high tillering (Liao et al, 2019). In addition, a beneficial allele of the SL biosynthesis gene HIGH TILLERING AND DWARF 1 (HTD1), also known as DWARF17 (D17), could increase tiller number and improve grain yield in rice, and has been widely utilized and co-selected with Semidwarf1 (SD1) since the green revolution (Wang et al, 2020b). Studies in other plant species, including Arabidopsis thaliana and Pisum sativum also show repression by auxin and abscisic acid (ABA), whereas cytokinins can promote bud outgrowth (Yao and Finlayson, 2015;Gonzalez-Grandio et al, 2017;Wang et al, 2018a).…”

Section: Introductionmentioning

confidence: 99%

ζ-Carotene Isomerase Suppresses Tillering in Rice through the Coordinated Biosynthesis of Strigolactone and Abscisic Acid

Yan

et al. 2020

Molecular Plant

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Rice tillering is an important agronomic trait affecting grain yield. Here, we identified a high-tillering mutant tillering20 (t20), which could be restored to the wild type by treatment with the strigolactone (SL) analog rac-GR24. T20 encodes a chloroplast z-carotene isomerase (Z-ISO), which is involved in the biosynthesis of carotenoids and their metabolites, SL and abscisic acid (ABA). The t20 mutant has reduced SL and ABA, raising the question of how SL and ABA biosynthesis is coordinated, and whether they have overlapping functions in tillering. We discovered that rac-GR24 stimulated T20 expression and enhanced all-transb-carotene biosynthesis. Importantly, rac-GR24 also stimulated expression of Oryza sativa 9-CIS-EPOXY-CAROTENOID DIOXYGENASE 1 (OsNCED1) through induction of Oryza sativa HOMEOBOX12 (OsHOX12), promoting ABA biosynthesis in shoot base. On the other hand, ABA treatment significantly repressed SL biosynthesis and the ABA biosynthetic mutants displayed elevated SL biosynthesis. ABA treatment reduced the number of basal tillers in both t20 and wild-type plants. Furthermore, while ABA-deficient mutants aba1 and aba2 had the same number of basal tillers as wild type, they had more unproductive upper tillers at maturity. This work demonstrates complex interactions in the biosynthesis of carotenoid, SLs and ABA, and reveals a role for ABA in the regulation of rice tillering.

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“…CCD1 and CCD4 cleavage carotenoids to form volatile small apocarotenoids (Hou et al ., 2016; Nacke et al ., 2012; Pu et al ., 2020; Yahyaa et al ., 2015; Zhang et al ., 2015; Zheng et al ., 2019). CCD7/MAX3 and CCD8/MAX4 are involved in the synthesis of strigolactones (SLs) (Alder et al ., 2012; Gomez‐Roldan et al ., 2008; Wang et al ., 2019; Wang et al ., 2020). The five members of the NCED sub‐group are exclusively involved in cleavage of violaxanthin and neoxanthin to form ABA (Fantini et al ., 2013).…”

Section: Introductionmentioning

confidence: 99%

GmCCD4 controls carotenoid content in soybeans

Gao

Yang

Tang

et al. 2020

Plant Biotechnology Journal

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Summary To better understand the mechanisms regulating plant carotenoid metabolism in staple crop, we report the map‐based cloning and functional characterization of the Glycine max carotenoid cleavage dioxygenase 4 (GmCCD4) gene, which encodes a carotenoid cleavage dioxygenase enzyme involved in metabolizing carotenoids into volatile β‐ionone. Loss of GmCCD4 protein function in four Glycine max increased carotenoid content (gmicc) mutants resulted in yellow flowers due to excessive accumulation of carotenoids in flower petals. The carotenoid contents also increase three times in gmicc1 seeds. A genome‐wide association study indicated that the GmCCD4 locus was one major locus associated with carotenoid content in natural population. Further analysis indicated that the haplotype‐1 of GmCCD4 gene was positively associated with higher carotenoid levels in soybean cultivars and accumulated more β‐carotene in engineered E. coli with ectopic expression of different GmCCD4 haplotypes. These observations uncovered that GmCCD4 was a negative regulator of carotenoid content in soybean, and its various haplotypes provide useful resources for future soybean breeding practice.

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A Strigolactone Biosynthesis Gene Contributed to the Green Revolution in Rice

Cited by 110 publications

References 44 publications

Spatiotemporal Resolved Leaf Angle Establishment Improves Rice Grain Yield via Controlling Population Density

Spatiotemporal Resolved Leaf Angle Establishment Improves Rice Grain Yield via Controlling Population Density

ζ-Carotene Isomerase Suppresses Tillering in Rice through the Coordinated Biosynthesis of Strigolactone and Abscisic Acid

GmCCD4 controls carotenoid content in soybeans

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