{"title":"The metal tolerance protein OsMTP11 facilitates cadmium sequestration in the vacuoles of leaf vascular cells for restricting its translocation into rice grains.","authors":"Peng Liu, Liang Sun, Yu Zhang, Yongjun Tan, Yuxing Zhu, Can Peng, Jiurong Wang, Huili Yan, Donghai Mao, Guohua Liang, Gang Liang, Xiaoxiang Li, Yuntao Liang, Feng Wang, Zhenyan He, Wenbang Tang, Daoyou Huang, Caiyan Chen","doi":"10.1016/j.molp.2024.09.012","DOIUrl":"10.1016/j.molp.2024.09.012","url":null,"abstract":"<p><p>Rice (Oryza sativa) provides >20% of the consumed calories in the human diet. However, rice is also a leading source of dietary cadmium (Cd) that seriously threatens human health. Deciphering the genetic network that underlies the grain-Cd accumulation will benefit the development of low-Cd rice and mitigate the effects of Cd accumulation in the rice grain. In this study, we identified a QTL gene, OsCS1, which is allelic to OsMTP11 and encodes a protein sequestering Cd in the leaf during vegetative growth and preventing Cd from being translocated to the grain after heading in rice. OsCS1 is predominantly expressed in leaf vascular parenchyma cells, where it binds to a vacuole-sorting receptor protein OsVSR2 and is translocated intracellularly from the trans-Golgi network to pre-vacuolar compartments and then to the vacuole. In this trafficking process, OsCS1 actively transports Cd into the endomembrane system and sequesters it in the vacuoles. There are natural variations in the promoter of OsCS1 between the indica and japonica rice subspecies. Duplication of a G-box-like motif in the promoter region of the superior allele of OsCS1 from indica rice enhances the binding of the transcription factor OsIRO2 to the OsCS1 promoter, thereby promoting OsCS1 expression. Introgression of this allele into commercial rice varieties could significantly lower grain-Cd levels compared to the inferior allele present in japonica rice. Collectively, our findings offer new insights into the genetic control of leaf-to-grain Cd translocation and provide a novel gene and its superior allele for the genetic improvement of low-Cd variety in rice.</p>","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":" ","pages":"1733-1752"},"PeriodicalIF":17.1,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142361820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Molecular PlantPub Date : 2024-11-04Epub Date: 2024-10-16DOI: 10.1016/j.molp.2024.10.008
Dongdong Lu, Caijuan Liu, Wenjun Ji, Ruiyan Xia, Shanshan Li, Yanxia Liu, Naixu Liu, Yongqi Liu, Xing Wang Deng, Bosheng Li
{"title":"Nanopore ultra-long sequencing and adaptive sampling spur plant complete telomere-to-telomere genome assembly.","authors":"Dongdong Lu, Caijuan Liu, Wenjun Ji, Ruiyan Xia, Shanshan Li, Yanxia Liu, Naixu Liu, Yongqi Liu, Xing Wang Deng, Bosheng Li","doi":"10.1016/j.molp.2024.10.008","DOIUrl":"10.1016/j.molp.2024.10.008","url":null,"abstract":"<p><p>The pursuit of complete telomere-to-telomere (T2T) genome assembly in plants, challenged by genomic complexity, has been advanced by Oxford Nanopore Technologies (ONT), which offers ultra-long, real-time sequencing. Despite its promise, sequencing length and gap filling remain significant challenges. This study optimized DNA extraction and library preparation, achieving DNA lengths exceeding 485 kb; average N50 read lengths of 80.57 kb, reaching up to 440 kb; and maximum reads of 5.83 Mb. Importantly, we demonstrated that combining ultra-long sequencing and adaptive sampling can effectively fill gaps during assembly, evidenced by successfully filling the remaining gaps of a near-complete Arabidopsis genome assembly and resolving the sequence of an unknown telomeric region in watermelon genome. Collectively, our strategies improve the feasibility of complete T2T genomic assemblies across various plant species, enhancing genome-based research in diverse fields.</p>","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":" ","pages":"1773-1786"},"PeriodicalIF":17.1,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Molecular PlantPub Date : 2024-11-04Epub Date: 2024-10-04DOI: 10.1016/j.molp.2024.10.003
Huang Tan, Chaonan Shi, Alberto P Macho, Rosa Lozano-Durán
{"title":"The cartography of plant immunity: Proximity labeling puts a novel SGT1-NSL1 regulatory module on the map.","authors":"Huang Tan, Chaonan Shi, Alberto P Macho, Rosa Lozano-Durán","doi":"10.1016/j.molp.2024.10.003","DOIUrl":"10.1016/j.molp.2024.10.003","url":null,"abstract":"","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":" ","pages":"1645-1647"},"PeriodicalIF":17.1,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142375688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Molecular PlantPub Date : 2024-11-04Epub Date: 2024-10-11DOI: 10.1016/j.molp.2024.10.005
Akira Mine
{"title":"Next-generation research on transcriptional regulation of plant immunity.","authors":"Akira Mine","doi":"10.1016/j.molp.2024.10.005","DOIUrl":"10.1016/j.molp.2024.10.005","url":null,"abstract":"","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":" ","pages":"1651-1653"},"PeriodicalIF":17.1,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Efficient control of root-knot nematodes by expressing Bt nematicidal proteins in root leucoplasts.","authors":"Yong Wang, Mengnan Wang, Yali Zhang, Longwei Peng, Dadong Dai, Fengjuan Zhang, Jiang Zhang","doi":"10.1016/j.molp.2024.08.004","DOIUrl":"10.1016/j.molp.2024.08.004","url":null,"abstract":"<p><p>Root-knot nematodes (RKNs) are plant pests that infect the roots of host plants. Bacillus thuringiensis (Bt) nematicidal proteins exhibited toxicity to nematodes. However, the application of nematicidal proteins for plant protection is hampered by the lack of effective delivery systems in transgenic plants. In this study, we discovered the accumulation of leucoplasts (root plastids) in galls and RKN-induced giant cells. RKN infection causes the degradation of leucoplasts into small vesicle-like structures, which are responsible for delivering proteins to RKNs, as observed through confocal microscopy and immunoelectron microscopy. We showed that different-sized proteins from leucoplasts could be taken up by Meloidogyne incognita female. To further explore the potential applications of leucoplasts, we introduced the Bt crystal protein Cry5Ba2 into tobacco and tomato leucoplasts by fusing it with a transit peptide. The transgenic plants showed significant resistance to RKNs. Intriguingly, RKN females preferentially took up Cry5Ba2 protein when delivered through plastids rather than the cytosol. The decrease in progeny was positively correlated with the delivery efficiency of the nematicidal protein. In conclusion, this study offers new insights into the feeding behavior of RKNs and their ability to ingest leucoplast proteins, and demonstrates that root leucoplasts can be used for delivering nematicidal proteins, thereby offering a promising approach for nematode control.</p>","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":" ","pages":"1504-1519"},"PeriodicalIF":17.1,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141988401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Molecular PlantPub Date : 2024-10-07Epub Date: 2024-08-22DOI: 10.1016/j.molp.2024.08.006
Dan Hu, Yilong Yao, Yan Lv, Jun You, Yu Zhang, Qingya Lv, Jiawei Li, Stephanie Hutin, Haiyan Xiong, Chloe Zubieta, Xuelei Lai, Lizhong Xiong
{"title":"The OsSRO1c-OsDREB2B complex undergoes protein phase transition to enhance cold tolerance in rice.","authors":"Dan Hu, Yilong Yao, Yan Lv, Jun You, Yu Zhang, Qingya Lv, Jiawei Li, Stephanie Hutin, Haiyan Xiong, Chloe Zubieta, Xuelei Lai, Lizhong Xiong","doi":"10.1016/j.molp.2024.08.006","DOIUrl":"10.1016/j.molp.2024.08.006","url":null,"abstract":"<p><p>Cold stress is one of the major abiotic stress factors affecting rice growth and development, leading to significant yield loss in the context of global climate change. Exploring natural variants that confer cold resistance and the underlying molecular mechanism responsible for this is the major strategy to breed cold-tolerant rice varieties. Here, we show that natural variations of a SIMILAR to RCD ONE (SRO) gene, OsSRO1c, confer cold tolerance in rice at both seedling and booting stages. Our in vivo and in vitro experiments demonstrated that OsSRO1c possesses intrinsic liquid-liquid phase-separation ability and recruits OsDREB2B, an AP2/ERF transcription factor that functions as a positive regulator of cold stress, into its biomolecular condensates in the nucleus, resulting in elevated transcriptional activity of OsDREB2B. We found that the OsSRO1c-OsDREB2B complex directly responds to low temperature through dynamic phase transitions and regulates key cold-response genes, including COLD1. Furthermore, we showed that introgression of an elite haplotype of OsSRO1c into a cold-susceptible indica rice could significantly increase its cold resistance. Collectively, our work reveals a novel cold-tolerance regulatory module in rice and provides promising genetic targets for molecular breeding of cold-tolerant rice varieties.</p>","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":" ","pages":"1520-1538"},"PeriodicalIF":17.1,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142018086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Strigolactone-gibberellin crosstalk mediated by a distant silencer fine-tunes plant height in upland cotton.","authors":"Zailong Tian, Baojun Chen, Hongge Li, Xinxin Pei, Yaru Sun, Gaofei Sun, Zhaoe Pan, Panhong Dai, Xu Gao, Xiaoli Geng, Zhen Peng, Yinhua Jia, Daowu Hu, Liru Wang, Baoyin Pang, Ai Zhang, Xiongming Du, Shoupu He","doi":"10.1016/j.molp.2024.08.007","DOIUrl":"10.1016/j.molp.2024.08.007","url":null,"abstract":"<p><p>Optimal plant height is crucial in modern agriculture, influencing lodging resistance and facilitating mechanized crop production. Upland cotton (Gossypium hirsutum) is the most important fiber crop globally; however, the genetic basis underlying plant height remains largely unexplored. In this study, we conducted a genome-wide association study to identify a major locus controlling plant height (PH1) in upland cotton. This locus encodes gibberellin 2-oxidase 1A (GhPH1) and features a 1133-bp structural variation (PAV<sup>PH1</sup>) located approximately 16 kb upstream. The presence or absence of PAV<sup>PH1</sup> influences the expression of GhPH1, thereby affecting plant height. Further analysis revealed that a gibberellin-regulating transcription factor (GhGARF) recognizes and binds to a specific CATTTG motif in both the GhPH1 promoter and PAV<sup>PH1</sup>. This interaction downregulates GhPH1, indicating that PAV<sup>PH1</sup> functions as a distant upstream silencer. Intriguingly, we found that DWARF53 (D53), a key repressor of the strigolactone (SL) signaling pathway, directly interacts with GhGARF to inhibit its binding to targets. Moreover, we identified a previously unrecognized gibberellin-SL crosstalk mechanism mediated by the GhD53-GhGARF-GhPH1/PAV<sup>PH1</sup> module, which is crucial for regulating plant height in upland cotton. These findings shed light on the genetic basis and gene interaction network underlying plant height, providing valuable insights for the development of semi-dwarf cotton varieties through precise modulation of GhPH1 expression.</p>","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":" ","pages":"1539-1557"},"PeriodicalIF":17.1,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142018087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Molecular PlantPub Date : 2024-10-07Epub Date: 2024-09-02DOI: 10.1016/j.molp.2024.09.002
Shichen Han, Yulong Wang, Yingxiu Li, Rui Zhu, Yunsong Gu, Jin Li, Haifeng Guo, Wei Ye, Hafiz Ghualm Nabi, Tao Yang, Yanming Wang, Pengli Liu, Junzhi Duan, Xingming Sun, Zhanying Zhang, Hongliang Zhang, Zichao Li, Jinjie Li
{"title":"The OsNAC41-RoLe1-OsAGAP module promotes root development and drought resistance in upland rice.","authors":"Shichen Han, Yulong Wang, Yingxiu Li, Rui Zhu, Yunsong Gu, Jin Li, Haifeng Guo, Wei Ye, Hafiz Ghualm Nabi, Tao Yang, Yanming Wang, Pengli Liu, Junzhi Duan, Xingming Sun, Zhanying Zhang, Hongliang Zhang, Zichao Li, Jinjie Li","doi":"10.1016/j.molp.2024.09.002","DOIUrl":"10.1016/j.molp.2024.09.002","url":null,"abstract":"<p><p>Drought is a major environmental stress limiting crop yields worldwide. Upland rice (Oryza sativa) has evolved complex genetic mechanisms for adaptative growth under drought stress. However, few genetic variants that mediate drought resistance in upland rice have been identified, and little is known about the evolution of this trait during rice domestication. In this study, using a genome-wide association study we identified ROOT LENGTH 1 (RoLe1) that controls rice root length and drought resistance. We found that a G-to-T polymorphism in the RoLe1 promoter causes increased binding of the transcription factor OsNAC41 and thereby enhanced expression of RoLe1. We further showed that RoLe1 interacts with OsAGAP, an ARF-GTPase activating protein involved in auxin-dependent root development, and interferes with its function to modulate root development. Interestingly, RoLe1 could enhance crop yield by increasing the seed-setting rate under moderate drought conditions. Genomic evolutionary analysis revealed that a newly arisen favorable allelic variant, proRoLe1<sup>-526T</sup>, originated from the midwest Asia and was retained in upland rice during domestication. Collectively, our study identifies an OsNAC41-RoLe1-OsAGAP module that promotes upland rice root development and drought resistance, providing promising genetic targets for molecular breeding of drought-resistant rice varieties.</p>","PeriodicalId":19012,"journal":{"name":"Molecular Plant","volume":" ","pages":"1573-1593"},"PeriodicalIF":17.1,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142126226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}