{"title":"Long-Distance Transported RNAs: From Identity to Function.","authors":"Julia Kehr, Richard J Morris, Friedrich Kragler","doi":"10.1146/annurev-arplant-070121-033601","DOIUrl":"https://doi.org/10.1146/annurev-arplant-070121-033601","url":null,"abstract":"<p><p>There is now a wealth of data, from different plants and labs and spanning more than two decades, which unequivocally demonstrates that RNAs can be transported over long distances, from the cell where they are transcribed to distal cells in other tissues. Different types of RNA molecules are transported, including micro- and messenger RNAs. Whether these RNAs are selected for transport and, if so, how they are selected and transported remain, in general, open questions. This aspect is likely not independent of the biological function and relevance of the transported RNAs, which are in most cases still unclear. In this review, we summarize the experimental data supporting selectivity or nonselectivity of RNA translocation and review the evidence for biological functions. After discussing potential issues regarding the comparability between experiments, we propose criteria that need to be critically evaluated to identify important signaling RNAs.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"73 ","pages":"457-474"},"PeriodicalIF":23.9,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39816432","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":"Plant Proteome Dynamics.","authors":"Julia Mergner, Bernhard Kuster","doi":"10.1146/annurev-arplant-102620-031308","DOIUrl":"https://doi.org/10.1146/annurev-arplant-102620-031308","url":null,"abstract":"<p><p>Proteins are intimately involved in executing and controlling virtually all cellular processes. To understand the molecular mechanisms that underlie plant phenotypes, it is essential to investigate protein expression, interactions, and modifications, to name a few. The proteome is highly dynamic in time and space, and a plethora of protein modifications, protein interactions, and network constellations are at play under specific conditions and developmental stages. Analysis of proteomes aims to characterize the entire protein complement of a particular cell type, tissue, or organism-a challenging task, given the dynamic nature of the proteome. Modern mass spectrometry-based proteomics technology can be used to address this complexity at a system-wide scale by the global identification and quantification of thousands of proteins. In this review, we present current methods and technologies employed in mass spectrometry-based proteomics and provide examples of dynamic changes in the plant proteome elucidated by proteomic approaches.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"73 ","pages":"67-92"},"PeriodicalIF":23.9,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39902853","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":"Engineering Apomixis: Clonal Seeds Approaching the Fields.","authors":"Charles J Underwood, Raphael Mercier","doi":"10.1146/annurev-arplant-102720-013958","DOIUrl":"https://doi.org/10.1146/annurev-arplant-102720-013958","url":null,"abstract":"<p><p>Apomixis is a form of reproduction leading to clonal seeds and offspring that are genetically identical to the maternal plant. While apomixis naturally occurs in hundreds of plant species distributed across diverse plant families, it is absent in major crop species. Apomixis has a revolutionary potential in plant breeding, as it could allow the instant fixation and propagation though seeds of any plant genotype, most notably F<sub>1</sub> hybrids. Mastering and implementing apomixis would reduce the cost of hybrid seed production, facilitate new types of hybrid breeding, and make it possible to harness hybrid vigor in crops that are not presently cultivated as hybrids. Synthetic apomixis can be engineered by combining modifications of meiosis and fertilization. Here, we review the current knowledge and recent major achievements toward the development of efficient apomictic systems usable in agriculture.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"73 ","pages":"201-225"},"PeriodicalIF":23.9,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39902854","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":"Phloem Loading and Unloading of Sucrose: What a Long, Strange Trip from Source to Sink.","authors":"David M Braun","doi":"10.1146/annurev-arplant-070721-083240","DOIUrl":"https://doi.org/10.1146/annurev-arplant-070721-083240","url":null,"abstract":"<p><p>Sucrose is transported from sources (mature leaves) to sinks (importing tissues such as roots, stems, fruits, and seeds) through the phloem tissues in veins. In many herbaceous crop species, sucrose must first be effluxed to the cell wall by a sugar transporter of the SWEET family prior to being taken up into phloem companion cells or sieve elements by a different sugar transporter, called SUT or SUC. The import of sucrose into these cells is termed apoplasmic phloem loading. In sinks, sucrose can similarly exit the phloem apoplasmically or, alternatively, symplasmically through plasmodesmata into connecting parenchyma storage cells. Recent advances describing the regulation and manipulation of sugar transporter expression and activities provide stimulating new insights into sucrose phloem loading in sources and unloading processes in sink tissues. Additionally, new breakthroughs have revealed distinct subpopulations of cells in leaves with different functions pertaining to phloem loading. These and other discoveries in sucrose transport are discussed.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"73 ","pages":"553-584"},"PeriodicalIF":23.9,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39928193","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}
Katherine Domb, Nan Wang, Guillaume Hummel, Chang Liu
{"title":"Spatial Features and Functional Implications of Plant 3D Genome Organization.","authors":"Katherine Domb, Nan Wang, Guillaume Hummel, Chang Liu","doi":"10.1146/annurev-arplant-102720-022810","DOIUrl":"https://doi.org/10.1146/annurev-arplant-102720-022810","url":null,"abstract":"<p><p>The advent of high-throughput sequencing-based methods for chromatin conformation, accessibility, and immunoprecipitation assays has been a turning point in 3D genomics. Altogether, these new tools have been pushing upward the interpretation of pioneer cytogenetic evidence for a higher order in chromatin packing. Here, we review the latest development in our understanding of plant spatial genome structures and different levels of organization and discuss their functional implications. Then, we spotlight the complexity of organellar (i.e., mitochondria and plastids) genomes and discuss their 3D packing into nucleoids. Finally, we propose unaddressed research axes to investigate functional links between chromatin-like dynamics and transcriptional regulation within organellar nucleoids.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"73 ","pages":"173-200"},"PeriodicalIF":23.9,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39594133","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":"Adventures in Life and Science, from Light to Rhythms.","authors":"Elaine Tobin","doi":"10.1146/annurev-arplant-090921-091346","DOIUrl":"https://doi.org/10.1146/annurev-arplant-090921-091346","url":null,"abstract":"<p><p>The author describes her life's pathway from her beginnings at a time when women were not well represented in the sciences. Her grandparents were immigrants to the United States. Although her parents were not able to go to college because of the Great Depression, they supported her education and other adventures. In addition to her interest in science, she describes her interest and involvement in politics. Her education at Oberlin, Stanford, and Harvard prepared her for her independent career at the University of California, Los Angeles, where she was an affirmative action appointment. Her research initially centered on the plant photoreceptor phytochrome, but later in her career she investigated circadian rhythms in plants, discovering and characterizing one of the members of the central oscillator.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"73 ","pages":"1-16"},"PeriodicalIF":23.9,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39594132","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":"VIGS Goes Viral: How VIGS Transforms Our Understanding of Plant Science.","authors":"Clemens Rössner, Dominik Lotz, Annette Becker","doi":"10.1146/annurev-arplant-102820-020542","DOIUrl":"https://doi.org/10.1146/annurev-arplant-102820-020542","url":null,"abstract":"<p><p>Virus-induced gene silencing (VIGS) has developed into an indispensable approach to gene function analysis in a wide array of species, many of which are not amenable to stable genetic transformation. VIGS utilizes the posttranscriptional gene silencing (PTGS) machinery of plants to restrain viral infections systemically and is used to downregulate the plant's endogenous genes. Here, we review the molecular mechanisms of DNA- and RNA-virus-based VIGS, its inherent connection to PTGS, and what is known about the systemic spread of silencing. Recently, VIGS-based technologies have been expanded to enable not only gene silencing but also overexpression [virus-induced overexpression (VOX)], genome editing [virus-induced genome editing (VIGE)], and host-induced gene silencing (HIGS). These techniques expand the genetic toolbox for nonmodel organisms even more. Further, we illustrate the versatility of VIGS and the methods derived from it in elucidating molecular mechanisms, using tomato fruit ripening and programmed cell death as examples. Finally, we discuss challenges of and future perspectives on the use of VIGS to advance gene function analysis in nonmodel plants in the postgenomic era.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"73 ","pages":"703-728"},"PeriodicalIF":23.9,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39607434","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}
Qian Liu, Kun Wu, Wenzhen Song, N. Zhong, Yunzhe Wu, Xiangdong Fu
{"title":"Improving Crop Nitrogen Use Efficiency Toward Sustainable Green Revolution.","authors":"Qian Liu, Kun Wu, Wenzhen Song, N. Zhong, Yunzhe Wu, Xiangdong Fu","doi":"10.1146/annurev-arplant-070121-015752","DOIUrl":"https://doi.org/10.1146/annurev-arplant-070121-015752","url":null,"abstract":"The Green Revolution of the 1960s improved crop yields in part through the widespread cultivation of semidwarf plant varieties, which resist lodging but require a high-nitrogen (N) fertilizer input. Because environmentally degrading synthetic fertilizer use underlies current worldwide cereal yields, future agricultural sustainability demands enhanced N use efficiency (NUE). Here, we summarize the current understanding of how plants sense, uptake, and respond to N availability in the model plants that can be used to improve sustainable productivity in agriculture. Recent progress in unlocking the genetic basis of NUE within the broader context of plant systems biology has provided insights into the coordination of plant growth and nutrient assimilation and inspired the implementation of a new breeding strategy to cut fertilizer use in high-yield cereal crops. We conclude that identifying fresh targets for N sensing and response in crops would simultaneously enable improved grain productivity and NUE to launch a new Green Revolution and promote future food security.","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"73 1","pages":"523-551"},"PeriodicalIF":23.9,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42956145","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}
Mayumi Iwasaki, Steven Penfield, Luis Lopez-Molina
{"title":"Parental and Environmental Control of Seed Dormancy in <i>Arabidopsis thaliana</i>.","authors":"Mayumi Iwasaki, Steven Penfield, Luis Lopez-Molina","doi":"10.1146/annurev-arplant-102820-090750","DOIUrl":"https://doi.org/10.1146/annurev-arplant-102820-090750","url":null,"abstract":"<p><p>Seed dormancy-the absence of seed germination under favorable germination conditions-is a plant trait that evolved to enhance seedling survival by avoiding germination under unsuitable environmental conditions. In <i>Arabidopsis</i>, dormancy levels are influenced by the seed coat composition, while the endosperm is essential to repress seed germination of dormant seeds upon their imbibition. Recent research has shown that the mother plant modulates its progeny seed dormancy in response to seasonal temperature changes by changing specific aspects of seed coat and endosperm development. This process involves genomic imprinting by means of epigenetic marks deposited in the seed progeny and regulators previously known to regulate flowering time. This review discusses and summarizes these discoveries and provides an update on our present understanding of the role of DOG1 and abscisic acid, two key contributors to dormancy.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"73 ","pages":"355-378"},"PeriodicalIF":23.9,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39902852","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}
S. Long, Samuel H. Taylor, S. Burgess, Elizabete Carmo‐Silva, T. Lawson, A. P. de Souza, L. Leonelli, Yu Wang
{"title":"Into the Shadows and Back into Sunlight: Photosynthesis in Fluctuating Light.","authors":"S. Long, Samuel H. Taylor, S. Burgess, Elizabete Carmo‐Silva, T. Lawson, A. P. de Souza, L. Leonelli, Yu Wang","doi":"10.1146/annurev-arplant-070221-024745","DOIUrl":"https://doi.org/10.1146/annurev-arplant-070221-024745","url":null,"abstract":"Photosynthesis is an important remaining opportunity for further improvement in the genetic yield potential of our major crops. Measurement, analysis, and improvement of leaf CO2 assimilation (A) have focused largely on photosynthetic rates under light-saturated steady-state conditions. However, in modern crop canopies of several leaf layers, light is rarely constant, and the majority of leaves experience marked light fluctuations throughout the day. It takes several minutes for photosynthesis to regain efficiency in both sun-shade and shade-sun transitions, costing a calculated 10-40% of potential crop CO2 assimilation. Transgenic manipulations to accelerate the adjustment in sun-shade transitions have already shown a substantial productivity increase in field trials. Here, we explore means to further accelerate these adjustments and minimize these losses through transgenic manipulation, gene editing, and exploitation of natural variation. Measurement andanalysis of photosynthesis in sun-shade and shade-sun transitions are explained. Factors limiting speeds of adjustment and how they could be modified to effect improved efficiency are reviewed, specifically nonphotochemical quenching (NPQ), Rubisco activation, and stomatal responses.","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"73 1","pages":"617-648"},"PeriodicalIF":23.9,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43629161","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}