Pub Date : 2024-10-18DOI: 10.1038/s41477-024-01834-5
With an increasing ability to understand the complexity of living systems, it becomes more and more evident that well-defined canonical functions of proteins and complexes are intertwined.
{"title":"Non-canonical functions","authors":"","doi":"10.1038/s41477-024-01834-5","DOIUrl":"10.1038/s41477-024-01834-5","url":null,"abstract":"With an increasing ability to understand the complexity of living systems, it becomes more and more evident that well-defined canonical functions of proteins and complexes are intertwined.","PeriodicalId":18904,"journal":{"name":"Nature Plants","volume":"10 10","pages":"1435-1435"},"PeriodicalIF":15.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41477-024-01834-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142448101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-18DOI: 10.1038/s41477-024-01826-5
The haplotype-resolved, chromosome-level genome assembly of tetraploid modern rose (Rosa hybrida), along with resequenced genomes of 233 diverse Rosa accessions, enabled the discovery of genetic contributions to the modern rose genome from its ancestral species. These insights into the origin and breeding history of roses open up new avenues for future breeding efforts.
{"title":"Unravelling the complex origin and breeding history of modern roses","authors":"","doi":"10.1038/s41477-024-01826-5","DOIUrl":"10.1038/s41477-024-01826-5","url":null,"abstract":"The haplotype-resolved, chromosome-level genome assembly of tetraploid modern rose (Rosa hybrida), along with resequenced genomes of 233 diverse Rosa accessions, enabled the discovery of genetic contributions to the modern rose genome from its ancestral species. These insights into the origin and breeding history of roses open up new avenues for future breeding efforts.","PeriodicalId":18904,"journal":{"name":"Nature Plants","volume":"10 11","pages":"1621-1622"},"PeriodicalIF":15.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142448152","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}
Pub Date : 2024-10-16DOI: 10.1038/s41477-024-01824-7
Xiaoya Tang, Ying He, Yihang Tang, Keqi Chen, Honghui Lin, Bo Liu, Xingguang Deng
Faithful genome partition during cell division relies on proper congression of chromosomes to the spindle equator before sister chromatid segregation. Here we uncover a kinesin-7 motor, kinetochore-associated kinesin 1 (KAK1), that is required for mitotic chromosome congression in Arabidopsis. KAK1 associates dynamically with kinetochores throughout mitosis. Loss of KAK1 results in severe defects in chromosome congression at metaphase, yet segregation errors at anaphase are rarely observed. KAK1 specifically interacts with the spindle assembly checkpoint protein BUB3.3 and both proteins show interdependent kinetochore localization. Chromosome misalignment in BUB3.3-depleted plants can be rescued by artificial tethering of KAK1 to kinetochores but not vice versa, demonstrating that KAK1 acts downstream of BUB3.3 to orchestrate microtubule-based chromosome transport at kinetochores. Moreover, we show that KAK1’s motor activity is essential for driving chromosome congression to the metaphase plate. Thus, our findings reveal that plants have repurposed BUB3.3 to interface with a specialized kinesin adapted to integrate proper chromosome congression and checkpoint control through a distinct kinetochore design. This study identifies a kinesin motor at kinetochores that teams up with a key mitotic checkpoint protein to orchestrate proper chromosome movement during plant cell division, revealing a plant-specific mechanism for maintaining genetic integrity.
{"title":"A kinetochore-associated kinesin-7 motor cooperates with BUB3.3 to regulate mitotic chromosome congression in Arabidopsis thaliana","authors":"Xiaoya Tang, Ying He, Yihang Tang, Keqi Chen, Honghui Lin, Bo Liu, Xingguang Deng","doi":"10.1038/s41477-024-01824-7","DOIUrl":"10.1038/s41477-024-01824-7","url":null,"abstract":"Faithful genome partition during cell division relies on proper congression of chromosomes to the spindle equator before sister chromatid segregation. Here we uncover a kinesin-7 motor, kinetochore-associated kinesin 1 (KAK1), that is required for mitotic chromosome congression in Arabidopsis. KAK1 associates dynamically with kinetochores throughout mitosis. Loss of KAK1 results in severe defects in chromosome congression at metaphase, yet segregation errors at anaphase are rarely observed. KAK1 specifically interacts with the spindle assembly checkpoint protein BUB3.3 and both proteins show interdependent kinetochore localization. Chromosome misalignment in BUB3.3-depleted plants can be rescued by artificial tethering of KAK1 to kinetochores but not vice versa, demonstrating that KAK1 acts downstream of BUB3.3 to orchestrate microtubule-based chromosome transport at kinetochores. Moreover, we show that KAK1’s motor activity is essential for driving chromosome congression to the metaphase plate. Thus, our findings reveal that plants have repurposed BUB3.3 to interface with a specialized kinesin adapted to integrate proper chromosome congression and checkpoint control through a distinct kinetochore design. This study identifies a kinesin motor at kinetochores that teams up with a key mitotic checkpoint protein to orchestrate proper chromosome movement during plant cell division, revealing a plant-specific mechanism for maintaining genetic integrity.","PeriodicalId":18904,"journal":{"name":"Nature Plants","volume":"10 11","pages":"1724-1736"},"PeriodicalIF":15.8,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142440635","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}
Pub Date : 2024-10-15DOI: 10.1038/s41477-024-01829-2
Niels A. Müller
Despite theoretical expectations of balanced 1:1 sex ratios between females and males, many dioecious plant species exhibit sex ratio distortions. A recent study in persimmon shows how this can be caused by random inactivation of an X-chromosomal gene that is essential for seed development.
尽管理论上认为雌性和雄性之间的性别比例应为 1:1，但许多雌雄异株的植物物种却表现出性别比例失调。最近在柿子中进行的一项研究表明，种子发育所必需的 X 染色体基因随机失活是造成这种情况的原因。
{"title":"X-specific methylation distorts sex","authors":"Niels A. Müller","doi":"10.1038/s41477-024-01829-2","DOIUrl":"10.1038/s41477-024-01829-2","url":null,"abstract":"Despite theoretical expectations of balanced 1:1 sex ratios between females and males, many dioecious plant species exhibit sex ratio distortions. A recent study in persimmon shows how this can be caused by random inactivation of an X-chromosomal gene that is essential for seed development.","PeriodicalId":18904,"journal":{"name":"Nature Plants","volume":"10 11","pages":"1619-1620"},"PeriodicalIF":15.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142440036","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}
Pub Date : 2024-10-15DOI: 10.1038/s41477-024-01818-5
Naoya Sugi, Andrea R. M. Calhau, Nathanaël M. A. Jacquier, Marina Millan-Blanquez, Jörg D. Becker, Kevin Begcy, Frédéric Berger, Cécile Bousquet-Antonelli, Daniel Bouyer, Giampiero Cai, Alice Y. Cheung, Sílvia Coimbra, Philipp Denninger, Thomas Dresselhaus, José A. Feijó, John E. Fowler, Danny Geelen, Ueli Grossniklaus, Tetsuya Higashiyama, David Honys, Tomoko Igawa, Gwyneth Ingram, Yvon Jaillais, Mark A. Johnson, Mariko Kato, Miki Kawachi, Tomokazu Kawashima, Yu-Jin Kim, Hong-Ju Li, Sébastien Mongrand, Kazuki Motomura, Shiori Nagahara, Kohdai P. Nakajima, Brad Nelms, Li-Jia Qu, Arp Schnittger, Stefan Scholten, Stefanie Sprunck, Meng-Xiang Sun, David Twell, Dolf Weijers, Wei-Cai Yang, Daisuke Maruyama, Thomas Widiez
{"title":"The peri-germ cell membrane: poorly characterized but key interface for plant reproduction","authors":"Naoya Sugi, Andrea R. M. Calhau, Nathanaël M. A. Jacquier, Marina Millan-Blanquez, Jörg D. Becker, Kevin Begcy, Frédéric Berger, Cécile Bousquet-Antonelli, Daniel Bouyer, Giampiero Cai, Alice Y. Cheung, Sílvia Coimbra, Philipp Denninger, Thomas Dresselhaus, José A. Feijó, John E. Fowler, Danny Geelen, Ueli Grossniklaus, Tetsuya Higashiyama, David Honys, Tomoko Igawa, Gwyneth Ingram, Yvon Jaillais, Mark A. Johnson, Mariko Kato, Miki Kawachi, Tomokazu Kawashima, Yu-Jin Kim, Hong-Ju Li, Sébastien Mongrand, Kazuki Motomura, Shiori Nagahara, Kohdai P. Nakajima, Brad Nelms, Li-Jia Qu, Arp Schnittger, Stefan Scholten, Stefanie Sprunck, Meng-Xiang Sun, David Twell, Dolf Weijers, Wei-Cai Yang, Daisuke Maruyama, Thomas Widiez","doi":"10.1038/s41477-024-01818-5","DOIUrl":"10.1038/s41477-024-01818-5","url":null,"abstract":"","PeriodicalId":18904,"journal":{"name":"Nature Plants","volume":"10 11","pages":"1607-1609"},"PeriodicalIF":15.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142440037","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}
Pub Date : 2024-10-15DOI: 10.1038/s41477-024-01832-7
Dawson M. White, Nigel C. A. Pitman, Kenneth J. Feeley, Gonzalo Rivas-Torres, Santiago Bravo-Sánchez, Francisco Sánchez-Parrales, John L. Clark, Carmen Ulloa Ulloa, Xavier Cornejo, Thomas L. P. Couvreur, Marcia Peñafiel, Gladys Benavides, Carmita Bonifaz, Juan Carlos Cerón, Andrea Fernández, Riley P. Fortier, Daniel Navas-Muñoz, Verónica Rojas M, J. Nicolás Zapata, Justin Williams, Juan Ernesto Guevara-Andino
Scientists’ limited understanding of tropical plant communities obscures the true extent of species loss caused by habitat destruction1. The Centinelan extinction hypothesis2,3 posits an extreme but widely referenced scenario wherein forest clearing causes the immediate extinction of species known only from a single geographic location. It remains unclear, however, whether the disappearance of such microendemics reflects their global extinction or insufficient collection effort at larger scales. Here we test these hypotheses by synthesizing decades of floristic data from the heavily deforested tropical cloud forest (TCF) at Centinela, Ecuador. We find that 99% of its putative microendemics have been collected elsewhere and are not extinct. Our field work also revealed new species, highlighting the enduring conservation value of TCFs and the intense efforts required to illuminate such plant diversity ‘darkspots’4. Field and herbarium research remain essential to the conservation action needed to forestall large-scale plant extinctions in Earth’s beleaguered cloud forests. Synthesis of decades of field, herbarium and taxonomic studies show the presumed extinct species of Ecuador’s iconic Centinela ridge have survived, revealing the complexity of tropical cloud forests and offering new optimism for their conservation.
{"title":"Refuting the hypothesis of Centinelan extinction at its place of origin","authors":"Dawson M. White, Nigel C. A. Pitman, Kenneth J. Feeley, Gonzalo Rivas-Torres, Santiago Bravo-Sánchez, Francisco Sánchez-Parrales, John L. Clark, Carmen Ulloa Ulloa, Xavier Cornejo, Thomas L. P. Couvreur, Marcia Peñafiel, Gladys Benavides, Carmita Bonifaz, Juan Carlos Cerón, Andrea Fernández, Riley P. Fortier, Daniel Navas-Muñoz, Verónica Rojas M, J. Nicolás Zapata, Justin Williams, Juan Ernesto Guevara-Andino","doi":"10.1038/s41477-024-01832-7","DOIUrl":"10.1038/s41477-024-01832-7","url":null,"abstract":"Scientists’ limited understanding of tropical plant communities obscures the true extent of species loss caused by habitat destruction1. The Centinelan extinction hypothesis2,3 posits an extreme but widely referenced scenario wherein forest clearing causes the immediate extinction of species known only from a single geographic location. It remains unclear, however, whether the disappearance of such microendemics reflects their global extinction or insufficient collection effort at larger scales. Here we test these hypotheses by synthesizing decades of floristic data from the heavily deforested tropical cloud forest (TCF) at Centinela, Ecuador. We find that 99% of its putative microendemics have been collected elsewhere and are not extinct. Our field work also revealed new species, highlighting the enduring conservation value of TCFs and the intense efforts required to illuminate such plant diversity ‘darkspots’4. Field and herbarium research remain essential to the conservation action needed to forestall large-scale plant extinctions in Earth’s beleaguered cloud forests. Synthesis of decades of field, herbarium and taxonomic studies show the presumed extinct species of Ecuador’s iconic Centinela ridge have survived, revealing the complexity of tropical cloud forests and offering new optimism for their conservation.","PeriodicalId":18904,"journal":{"name":"Nature Plants","volume":"10 11","pages":"1627-1634"},"PeriodicalIF":15.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142440042","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}
Pub Date : 2024-10-14DOI: 10.1038/s41477-024-01843-4
Kai Purnhagen, Yasmine Ambrogio, Detlef Bartsch, Dennis Eriksson, Petra Jorasch, Jens Kahrmann, Maximilian Kardung, Alexandra Molitorisová, Alessandro Monaco, Amrit K. Nanda, Jörg Romeis, Nils Rostoks, Katharina Unkel, Xenia T. Schneider
{"title":"Author Correction: Options for regulating new genomic techniques for plants in the European Union","authors":"Kai Purnhagen, Yasmine Ambrogio, Detlef Bartsch, Dennis Eriksson, Petra Jorasch, Jens Kahrmann, Maximilian Kardung, Alexandra Molitorisová, Alessandro Monaco, Amrit K. Nanda, Jörg Romeis, Nils Rostoks, Katharina Unkel, Xenia T. Schneider","doi":"10.1038/s41477-024-01843-4","DOIUrl":"10.1038/s41477-024-01843-4","url":null,"abstract":"","PeriodicalId":18904,"journal":{"name":"Nature Plants","volume":"10 11","pages":"1838-1838"},"PeriodicalIF":15.8,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41477-024-01843-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Plant roots exhibit localized immunity (LI) mainly in the transition zone (TZ) and elongation zone (EZ). Plasma membrane-localized receptor-like kinases (RLKs) can mediate the plant’s response to rhizosphere bacteria. However, how RLKs are involved in triggering LI in roots remains unclear. Here we identified dual actions for the RLK FERONIA (FER) in the LI response of Arabidopsis (Arabidopsis thaliana). The FER cytoplasmic domain is cleaved and translocated to the nucleus (FERN) to activate LI in the TZ and EZ in response to colonization by beneficial and pathogenic bacteria. In the absence or cessation of bacterial infection, full-length FER is plasma membrane-localized to maintain growth. Upon colonization and invasion by a high titre of bacteria, mature RAPID ALKALINIZATION FACTOR23 peptide accumulates and activates the matrix metalloproteinase At2-MMP, which triggers FER cytoplasmic domain cleavage specifically in the TZ and EZ to activate LI. This work demonstrates that two molecular forms of a single RLK balance growth and immunity via LI activation in Arabidopsis roots. This research identifies a regulatory role for the receptor-like kinase FERONIA in Arabidopsis roots, finding that it balances growth and immunity by activating localized immunity in response to bacterial colonization.
植物根系主要在过渡区（TZ）和伸长区（EZ）表现出局部免疫（LI）。质膜定位的类受体激酶（RLKs）可以介导植物对根瘤菌的反应。然而，RLKs 是如何参与触发根部 LI 的仍不清楚。在这里，我们发现了 RLK FERONIA（FER）在拟南芥（Arabidopsis thaliana）根瘤菌反应中的双重作用。FER 细胞质结构域被裂解并转运到细胞核（FERN），以激活 TZ 和 EZ 中的 LI，从而对有益菌和病原菌的定殖做出反应。在没有细菌感染或细菌感染停止时，全长 FER 定位于质膜，以维持生长。当高滴度细菌定植和入侵时，成熟的 RAPID ALKALINIZATION FACTOR23 肽积累并激活基质金属蛋白酶 At2-MMP，从而引发 FER 细胞质结构域特异性地在 TZ 和 EZ 中裂解，激活 LI。这项工作证明，单一 RLK 的两种分子形式通过拟南芥根中的 LI 激活来平衡生长和免疫。
{"title":"Regulated cleavage and translocation of FERONIA control immunity in Arabidopsis roots","authors":"Jia Chen, Fan Xu, Xiaonan Qiang, Hongbin Liu, Long Wang, Lingli Jiang, Chiyu Li, Bingqian Wang, Sheng Luan, Dousheng Wu, Feng Zhou, Feng Yu","doi":"10.1038/s41477-024-01823-8","DOIUrl":"10.1038/s41477-024-01823-8","url":null,"abstract":"Plant roots exhibit localized immunity (LI) mainly in the transition zone (TZ) and elongation zone (EZ). Plasma membrane-localized receptor-like kinases (RLKs) can mediate the plant’s response to rhizosphere bacteria. However, how RLKs are involved in triggering LI in roots remains unclear. Here we identified dual actions for the RLK FERONIA (FER) in the LI response of Arabidopsis (Arabidopsis thaliana). The FER cytoplasmic domain is cleaved and translocated to the nucleus (FERN) to activate LI in the TZ and EZ in response to colonization by beneficial and pathogenic bacteria. In the absence or cessation of bacterial infection, full-length FER is plasma membrane-localized to maintain growth. Upon colonization and invasion by a high titre of bacteria, mature RAPID ALKALINIZATION FACTOR23 peptide accumulates and activates the matrix metalloproteinase At2-MMP, which triggers FER cytoplasmic domain cleavage specifically in the TZ and EZ to activate LI. This work demonstrates that two molecular forms of a single RLK balance growth and immunity via LI activation in Arabidopsis roots. This research identifies a regulatory role for the receptor-like kinase FERONIA in Arabidopsis roots, finding that it balances growth and immunity by activating localized immunity in response to bacterial colonization.","PeriodicalId":18904,"journal":{"name":"Nature Plants","volume":"10 11","pages":"1761-1774"},"PeriodicalIF":15.8,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142431689","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}
Pub Date : 2024-10-11DOI: 10.1038/s41477-024-01810-z
Mohan Sharma, Thomas Friedrich, Peter Oluoch, Ning Zhang, Federico Peruzzo, Vikram Jha, Limin Pi, Edwin Philip Groot, Noortje Kornet, Marie Follo, Ernst Aichinger, Christian Fleck, Thomas Laux
Stem cells in plant meristems are kept undifferentiated by signals from surrounding cells and provide the basis for continuous organ formation. In the stem cell organizer of the Arabidopsis thaliana root, the quiescent centre (QC), the WOX5 transcription factor, functions as a central hub in regulating columella stem cell (CSC) homoeostasis. However, the processes mediating WOX5 function are only poorly understood. Here we identify the transcription factor HAN as a central mediator of WOX5-regulated stem cell maintenance. HAN is required for mitotic quiescence of QC and CSC maintenance and is sufficient to induce ectopic stem cells. WOX5 and HAN repress transcription of the differentiation factor gene CDF4 in a coherent feed-forward loop (cFFL), one output of which is the expression of the auxin biosynthesis gene TAA1 and maintenance of auxin response maxima in the organizer. These findings and mathematical modelling provide a mechanistic framework for WOX5 function in the root stem cell niche. The stem cells in the Arabidopsis root meristem are maintained by the expression of the transcription factor WOX5 in the stem cell organizer. This study reveals that WOX5 functions in a coherent feed-forward loop, regulating auxin signalling.
{"title":"A coherent feed-forward loop in the Arabidopsis root stem cell organizer regulates auxin biosynthesis and columella stem cell maintenance","authors":"Mohan Sharma, Thomas Friedrich, Peter Oluoch, Ning Zhang, Federico Peruzzo, Vikram Jha, Limin Pi, Edwin Philip Groot, Noortje Kornet, Marie Follo, Ernst Aichinger, Christian Fleck, Thomas Laux","doi":"10.1038/s41477-024-01810-z","DOIUrl":"10.1038/s41477-024-01810-z","url":null,"abstract":"Stem cells in plant meristems are kept undifferentiated by signals from surrounding cells and provide the basis for continuous organ formation. In the stem cell organizer of the Arabidopsis thaliana root, the quiescent centre (QC), the WOX5 transcription factor, functions as a central hub in regulating columella stem cell (CSC) homoeostasis. However, the processes mediating WOX5 function are only poorly understood. Here we identify the transcription factor HAN as a central mediator of WOX5-regulated stem cell maintenance. HAN is required for mitotic quiescence of QC and CSC maintenance and is sufficient to induce ectopic stem cells. WOX5 and HAN repress transcription of the differentiation factor gene CDF4 in a coherent feed-forward loop (cFFL), one output of which is the expression of the auxin biosynthesis gene TAA1 and maintenance of auxin response maxima in the organizer. These findings and mathematical modelling provide a mechanistic framework for WOX5 function in the root stem cell niche. The stem cells in the Arabidopsis root meristem are maintained by the expression of the transcription factor WOX5 in the stem cell organizer. This study reveals that WOX5 functions in a coherent feed-forward loop, regulating auxin signalling.","PeriodicalId":18904,"journal":{"name":"Nature Plants","volume":"10 11","pages":"1737-1748"},"PeriodicalIF":15.8,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142405487","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}
Pub Date : 2024-10-11DOI: 10.1038/s41477-024-01825-6
Xiao Chen, Dou-Dou Huang, Jing-Shi Xue, Jiang-He Bu, Ming-Qiang Guo, Ming-Qi Zhang, Na Wang, Ji-Rong Huang, Wan-Sheng Chen, Zhong-Nan Yang
Sporopollenin, a critical innovation in the evolution of terrestrial plants, is the core building brick for the outer wall of land-plant spores and pollen. Despite its significance, the basic structure of sporopollenin remains elusive due to its extreme chemical inertness. In this study, we used ethanolamine to completely dissolve rape sporopollenin and successfully identified a total of 22 components, including fatty acids, p-coumaric acid, sterols and polymeric phenylpropanoid derivatives. After that, using NaOH treatment and partial dissolution, alongside Arabidopsis mutants analysis and spectroscopic methods, we determined that polymeric phenylpropanoid derivatives crosslinked by hydroxyl fatty acids serve as the core structure of sporopollenin. The free hydroxyl groups and carboxyl groups of the polymeric phenylpropanoid derivatives can be modified by other fatty acids (C16:0, C18:0 and C18:3) as well as alcohols/phenols (for example, naringenin, β-sitosterol), resulting in a structure that protects pollen from terrestrial stresses. This discovery provides a basis for further exploration of sporopollenin’s role in plant reproduction and evolution. The core structure of rape sporopollenin consists of polymeric phenylpropanoid derivatives crosslinked by hydroxyl fatty acids, while other components ligated to free hydroxyl and carboxyl groups of the core structure to form the peripheral structure.
{"title":"Polymeric phenylpropanoid derivatives crosslinked by hydroxyl fatty acids form the core structure of rape sporopollenin","authors":"Xiao Chen, Dou-Dou Huang, Jing-Shi Xue, Jiang-He Bu, Ming-Qiang Guo, Ming-Qi Zhang, Na Wang, Ji-Rong Huang, Wan-Sheng Chen, Zhong-Nan Yang","doi":"10.1038/s41477-024-01825-6","DOIUrl":"10.1038/s41477-024-01825-6","url":null,"abstract":"Sporopollenin, a critical innovation in the evolution of terrestrial plants, is the core building brick for the outer wall of land-plant spores and pollen. Despite its significance, the basic structure of sporopollenin remains elusive due to its extreme chemical inertness. In this study, we used ethanolamine to completely dissolve rape sporopollenin and successfully identified a total of 22 components, including fatty acids, p-coumaric acid, sterols and polymeric phenylpropanoid derivatives. After that, using NaOH treatment and partial dissolution, alongside Arabidopsis mutants analysis and spectroscopic methods, we determined that polymeric phenylpropanoid derivatives crosslinked by hydroxyl fatty acids serve as the core structure of sporopollenin. The free hydroxyl groups and carboxyl groups of the polymeric phenylpropanoid derivatives can be modified by other fatty acids (C16:0, C18:0 and C18:3) as well as alcohols/phenols (for example, naringenin, β-sitosterol), resulting in a structure that protects pollen from terrestrial stresses. This discovery provides a basis for further exploration of sporopollenin’s role in plant reproduction and evolution. The core structure of rape sporopollenin consists of polymeric phenylpropanoid derivatives crosslinked by hydroxyl fatty acids, while other components ligated to free hydroxyl and carboxyl groups of the core structure to form the peripheral structure.","PeriodicalId":18904,"journal":{"name":"Nature Plants","volume":"10 11","pages":"1790-1800"},"PeriodicalIF":15.8,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142405486","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}
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