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Agronomic Trait

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Yonghong Wang – One of the best experts on this subject based on the ideXlab platform.

  • osbrxl4 regulates shoot gravitropism and rice tiller angle through affecting lazy1 nuclear localization
    Molecular Plant, 2019
    Co-Authors: Zhen Li, Yan Liang, Xiangbing Meng, Yundong Yuan, Jiayang Li, Lei Wang, Guosheng Xiong, Jie Zhou, Yonghong Wang

    Abstract:

    Abstract Rice tiller angle is a key Agronomic Trait that contributes to ideal plant architecture and grain production. LAZY1 (LA1) was previously shown to control tiller angle via affecting shoot gravitropism, but the underlying molecular mechanism remains largely unknown. In this study, we identified an LA1-interacting protein named Brevis Radix Like 4 (OsBRXL4). We showed that the interaction between OsBRXL4 and LA1 occurs at the plasma membrane and that their interaction determines nuclear localization of LA1. We found that nuclear localization of LA1 is essential for its function, which is different from AtLA1, its Arabidopsis ortholog. Overexpression of OsBRXL4 leads to a prostrate growth phenotype, whereas OsBRXLs RNAi plants, in which the expression levels of OsBRXL1, OsBRXL4, and OsBRXL5 were decreased, display a compact phenotype. Further genetic analysis also supported that OsBRXL4 controls rice tiller angle by affecting nuclear localization of LA1. Consistently, we demonstrated that OsBRXL4 regulates the shoot gravitropism through affecting polar auxin transport as did LA1. Taken together, our study not only identifies OsBRXL4 as a regulatory component of rice tiller angle but also provides new insights into genetic regulation of rice plant architecture.

  • strigolactones regulate rice tiller angle by attenuating shoot gravitropism through inhibiting auxin biosynthesis
    Proceedings of the National Academy of Sciences of the United States of America, 2014
    Co-Authors: Dajun Sang, Dongqin Chen, Yan Liang, Linzhou Huang, Xiangbing Meng, Guojun Dong, Yundong Yuan, Qian Qian, Jiayang Li, Yonghong Wang

    Abstract:

    Tiller angle, a key Agronomic Trait for achieving ideal plant architecture and increasing grain yield, is regulated mainly by shoot gravitropism. Strigolactones (SLs) are a group of newly identified plant hormones that are essential for shoot branching/rice tillering and have further biological functions as yet undetermined. Through screening for suppressors of lazy1 (sols), a classic rice mutant exhibiting large tiller angle and defective shoot gravitropism, we identified multiple SOLS that are involved in the SL biosynthetic or signaling pathway. We show that SL biosynthetic or signaling mutants can rescue the spreading phenotype of lazy1 (la1) and that SLs can inhibit auxin biosynthesis and attenuate rice shoot gravitropism, mainly by decreasing the local indoleacetic acid content. Although both SLs and LA1 are negative regulators of polar auxin transport, SLs do not alter the lateral auxin transport of shoot base, unlike LA1, which is a positive regulator of lateral auxin transport in rice. Genetic evidence demonstrates that SLs and LA1 participate in regulating shoot gravitropism and tiller angle in distinct genetic pathways. In addition, the SL-mediated shoot gravitropism is conserved in Arabidopsis. Our results disclose a new role of SLs and shed light on a previously unidentified mechanism underlying shoot gravitropism. Our study indicates that SLs could be considered as an important tool to achieve ideal plant architecture in the future.

  • lazy1 controls rice shoot gravitropism through regulating polar auxin transport
    Cell Research, 2007
    Co-Authors: Peijin Li, Yonghong Wang, Qian Qian, Zhiming Fu, Mei Wang, Dali Zeng, Baohua Li, Xiujie Wang, Jiayang Li

    Abstract:

    Tiller angle of rice (Oryza sativa L.) is an important Agronomic Trait that contributes to grain production, and has long attracted attentions of breeders for achieving ideal plant architecture to improve grain yield. Although enormous efforts have been made over the past decades to study mutants with extremely spreading or compact tillers, the molecular mechanism underlying the control of tiller angle of cereal crops remains unknown. Here we report the cloning of the LAZY1 (LA1) gene that regulates shoot gravitropism by which the rice tiller angle is controlled. We show that LA1, a novel grass-specific gene, is temporally and spatially expressed, and plays a negative role in polar auxin transport (PAT). Loss-of-function of LA1 enhances PAT greatly and thus alters the endogenous IAA distribution in shoots, leading to the reduced gravitropism, and therefore the tiller-spreading phenotype of rice plants.

Jiayang Li – One of the best experts on this subject based on the ideXlab platform.

  • osbrxl4 regulates shoot gravitropism and rice tiller angle through affecting lazy1 nuclear localization
    Molecular Plant, 2019
    Co-Authors: Zhen Li, Yan Liang, Xiangbing Meng, Yundong Yuan, Jiayang Li, Lei Wang, Guosheng Xiong, Jie Zhou, Yonghong Wang

    Abstract:

    Abstract Rice tiller angle is a key Agronomic Trait that contributes to ideal plant architecture and grain production. LAZY1 (LA1) was previously shown to control tiller angle via affecting shoot gravitropism, but the underlying molecular mechanism remains largely unknown. In this study, we identified an LA1-interacting protein named Brevis Radix Like 4 (OsBRXL4). We showed that the interaction between OsBRXL4 and LA1 occurs at the plasma membrane and that their interaction determines nuclear localization of LA1. We found that nuclear localization of LA1 is essential for its function, which is different from AtLA1, its Arabidopsis ortholog. Overexpression of OsBRXL4 leads to a prostrate growth phenotype, whereas OsBRXLs RNAi plants, in which the expression levels of OsBRXL1, OsBRXL4, and OsBRXL5 were decreased, display a compact phenotype. Further genetic analysis also supported that OsBRXL4 controls rice tiller angle by affecting nuclear localization of LA1. Consistently, we demonstrated that OsBRXL4 regulates the shoot gravitropism through affecting polar auxin transport as did LA1. Taken together, our study not only identifies OsBRXL4 as a regulatory component of rice tiller angle but also provides new insights into genetic regulation of rice plant architecture.

  • strigolactones regulate rice tiller angle by attenuating shoot gravitropism through inhibiting auxin biosynthesis
    Proceedings of the National Academy of Sciences of the United States of America, 2014
    Co-Authors: Dajun Sang, Dongqin Chen, Yan Liang, Linzhou Huang, Xiangbing Meng, Guojun Dong, Yundong Yuan, Qian Qian, Jiayang Li, Yonghong Wang

    Abstract:

    Tiller angle, a key Agronomic Trait for achieving ideal plant architecture and increasing grain yield, is regulated mainly by shoot gravitropism. Strigolactones (SLs) are a group of newly identified plant hormones that are essential for shoot branching/rice tillering and have further biological functions as yet undetermined. Through screening for suppressors of lazy1 (sols), a classic rice mutant exhibiting large tiller angle and defective shoot gravitropism, we identified multiple SOLS that are involved in the SL biosynthetic or signaling pathway. We show that SL biosynthetic or signaling mutants can rescue the spreading phenotype of lazy1 (la1) and that SLs can inhibit auxin biosynthesis and attenuate rice shoot gravitropism, mainly by decreasing the local indoleacetic acid content. Although both SLs and LA1 are negative regulators of polar auxin transport, SLs do not alter the lateral auxin transport of shoot base, unlike LA1, which is a positive regulator of lateral auxin transport in rice. Genetic evidence demonstrates that SLs and LA1 participate in regulating shoot gravitropism and tiller angle in distinct genetic pathways. In addition, the SL-mediated shoot gravitropism is conserved in Arabidopsis. Our results disclose a new role of SLs and shed light on a previously unidentified mechanism underlying shoot gravitropism. Our study indicates that SLs could be considered as an important tool to achieve ideal plant architecture in the future.

  • lazy1 controls rice shoot gravitropism through regulating polar auxin transport
    Cell Research, 2007
    Co-Authors: Peijin Li, Yonghong Wang, Qian Qian, Zhiming Fu, Mei Wang, Dali Zeng, Baohua Li, Xiujie Wang, Jiayang Li

    Abstract:

    Tiller angle of rice (Oryza sativa L.) is an important Agronomic Trait that contributes to grain production, and has long attracted attentions of breeders for achieving ideal plant architecture to improve grain yield. Although enormous efforts have been made over the past decades to study mutants with extremely spreading or compact tillers, the molecular mechanism underlying the control of tiller angle of cereal crops remains unknown. Here we report the cloning of the LAZY1 (LA1) gene that regulates shoot gravitropism by which the rice tiller angle is controlled. We show that LA1, a novel grass-specific gene, is temporally and spatially expressed, and plays a negative role in polar auxin transport (PAT). Loss-of-function of LA1 enhances PAT greatly and thus alters the endogenous IAA distribution in shoots, leading to the reduced gravitropism, and therefore the tiller-spreading phenotype of rice plants.

Qian Qian – One of the best experts on this subject based on the ideXlab platform.

  • strigolactones regulate rice tiller angle by attenuating shoot gravitropism through inhibiting auxin biosynthesis
    Proceedings of the National Academy of Sciences of the United States of America, 2014
    Co-Authors: Dajun Sang, Dongqin Chen, Yan Liang, Linzhou Huang, Xiangbing Meng, Guojun Dong, Yundong Yuan, Qian Qian, Jiayang Li, Yonghong Wang

    Abstract:

    Tiller angle, a key Agronomic Trait for achieving ideal plant architecture and increasing grain yield, is regulated mainly by shoot gravitropism. Strigolactones (SLs) are a group of newly identified plant hormones that are essential for shoot branching/rice tillering and have further biological functions as yet undetermined. Through screening for suppressors of lazy1 (sols), a classic rice mutant exhibiting large tiller angle and defective shoot gravitropism, we identified multiple SOLS that are involved in the SL biosynthetic or signaling pathway. We show that SL biosynthetic or signaling mutants can rescue the spreading phenotype of lazy1 (la1) and that SLs can inhibit auxin biosynthesis and attenuate rice shoot gravitropism, mainly by decreasing the local indoleacetic acid content. Although both SLs and LA1 are negative regulators of polar auxin transport, SLs do not alter the lateral auxin transport of shoot base, unlike LA1, which is a positive regulator of lateral auxin transport in rice. Genetic evidence demonstrates that SLs and LA1 participate in regulating shoot gravitropism and tiller angle in distinct genetic pathways. In addition, the SL-mediated shoot gravitropism is conserved in Arabidopsis. Our results disclose a new role of SLs and shed light on a previously unidentified mechanism underlying shoot gravitropism. Our study indicates that SLs could be considered as an important tool to achieve ideal plant architecture in the future.

  • mutation of the rice narrow leaf1 gene which encodes a novel protein affects vein patterning and polar auxin transport
    Plant Physiology, 2008
    Co-Authors: Jing Qi, Qian Qian, Qingyun Bu, Shuyu Li, Qian Chen, Wenxing Liang, Yihua Zhou, Xugang Li, Klaus Palme, Bingran Zhao

    Abstract:

    The size and shape of the plant leaf is an important Agronomic Trait. To understand the molecular mechanism governing plant leaf shape, we characterized a classic rice (Oryza sativa) dwarf mutant named narrow leaf1 (nal1), which exhibits a characteristic phenotype of narrow leaves. In accordance with reduced leaf blade width, leaves of nal1 contain a decreased number of longitudinal veins. Anatomical investigations revealed that the culms of nal1 also show a defective vascular system, in which the number and distribution pattern of vascular bundles are altered. Map-based cloning and genetic complementation analyses demonstrated that Nal1 encodes a plant-specific protein with unknown biochemical function. We provide evidence showing that Nal1 is richly expressed in vascular tissues and that mutation of this gene leads to significantly reduced polar auxin transport capacity. These results indicate that Nal1 affects polar auxin transport as well as the vascular patterns of rice plants and plays an important role in the control of lateral leaf growth.

  • lazy1 controls rice shoot gravitropism through regulating polar auxin transport
    Cell Research, 2007
    Co-Authors: Peijin Li, Yonghong Wang, Qian Qian, Zhiming Fu, Mei Wang, Dali Zeng, Baohua Li, Xiujie Wang, Jiayang Li

    Abstract:

    Tiller angle of rice (Oryza sativa L.) is an important Agronomic Trait that contributes to grain production, and has long attracted attentions of breeders for achieving ideal plant architecture to improve grain yield. Although enormous efforts have been made over the past decades to study mutants with extremely spreading or compact tillers, the molecular mechanism underlying the control of tiller angle of cereal crops remains unknown. Here we report the cloning of the LAZY1 (LA1) gene that regulates shoot gravitropism by which the rice tiller angle is controlled. We show that LA1, a novel grass-specific gene, is temporally and spatially expressed, and plays a negative role in polar auxin transport (PAT). Loss-of-function of LA1 enhances PAT greatly and thus alters the endogenous IAA distribution in shoots, leading to the reduced gravitropism, and therefore the tiller-spreading phenotype of rice plants.