{"title":"Prospects for Engineering Biophysical CO<sub>2</sub> Concentrating Mechanisms into Land Plants to Enhance Yields.","authors":"Jessica H Hennacy, Martin C Jonikas","doi":"10.1146/annurev-arplant-081519-040100","DOIUrl":"10.1146/annurev-arplant-081519-040100","url":null,"abstract":"<p><p>Although cyanobacteria and algae represent a small fraction of the biomass of all primary producers, their photosynthetic activity accounts for roughly half of the daily CO<sub>2</sub> fixation that occurs on Earth. These microorganisms are able to accomplish this feat by enhancing the activity of the CO<sub>2</sub>-fixing enzyme Rubisco using biophysical CO<sub>2</sub> concentrating mechanisms (CCMs). Biophysical CCMs operate by concentrating bicarbonate and converting it into CO<sub>2</sub> in a compartment that houses Rubisco (in contrast with other CCMs that concentrate CO<sub>2</sub> via an organic intermediate, such as malate in the case of C<sub>4</sub> CCMs). This activity provides Rubisco with a high concentration of its substrate, thereby increasing its reaction rate. The genetic engineering of a biophysical CCM into land plants is being pursued as a strategy to increase crop yields. This review focuses on the progress toward understanding the molecular components of cyanobacterial and algal CCMs, as well as recent advances toward engineering these components into land plants.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"71 ","pages":"461-485"},"PeriodicalIF":23.9,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7845915/pdf/nihms-1656499.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37720075","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}
{"title":"Mechanisms of Cryptochrome-Mediated Photoresponses in Plants.","authors":"Qin Wang, Chentao Lin","doi":"10.1146/annurev-arplant-050718-100300","DOIUrl":"10.1146/annurev-arplant-050718-100300","url":null,"abstract":"<p><p>Cryptochromes are blue-light receptors that mediate photoresponses in plants. The genomes of most land plants encode two clades of cryptochromes, CRY1 and CRY2, which mediate distinct and overlapping photoresponses within the same species and between different plant species. Photoresponsive protein-protein interaction is the primary mode of signal transduction of cryptochromes. Cryptochromes exist as physiologically inactive monomers in the dark; the absorption of photons leads to conformational change and cryptochrome homooligomerization, which alters the affinity of cryptochromes interacting with cryptochrome-interacting proteins to form various cryptochrome complexes. These cryptochrome complexes, collectively referred to as the cryptochrome complexome, regulate transcription or stability of photoresponsive proteins to modulate plant growth and development. The activity of cryptochromes is regulated by photooligomerization; dark monomerization; cryptochrome regulatory proteins; and cryptochrome phosphorylation, ubiquitination, and degradation. Most of the more than 30 presently known cryptochrome-interacting proteins are either regulated by other photoreceptors or physically interactingwith the protein complexes of other photoreceptors. Some cryptochrome-interacting proteins are also hormonal signaling or regulatory proteins. These two mechanisms enable cryptochromes to integrate blue-light signals with other internal and external signals to optimize plant growth and development.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"71 ","pages":"103-129"},"PeriodicalIF":21.3,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7428154/pdf/nihms-1617189.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37734951","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}
{"title":"A Bridge to the World.","authors":"Zhi-Hong Xu","doi":"10.1146/annurev-arplant-081519-035831","DOIUrl":"https://doi.org/10.1146/annurev-arplant-081519-035831","url":null,"abstract":"<p><p>Zhi-Hong Xu is a plant physiologist who studied botany at Peking University (1959-1965). He joined the Shanghai Institute of Plant Physiology (SIPP), Chinese Academy of Sciences (CAS), as a graduate student in 1965. He recalls what has happened for the institute, during the Cultural Revolution, and he witnessed the spring of science eventually coming to China. Xu was a visiting scholar at the John Innes Institute and in the Department of Botany at Nottingham University in the United Kingdom (1979-1981). He became deputy director of SIPP in 1983 and director in 1991; he also chaired the State Key Laboratory of Plant Molecular Genetics SIPP (1988-1996). He worked as a visiting scientist in the Institute of Molecular and Cell Biology, National University of Singapore, for three months each year (1989-1992). He served as vice president of CAS (1992-2002) and as president of Peking University (1999-2008). Over these periods he was heavily involved in the design and implementation of major scientific projects in life sciences and agriculture in China. He is an academician of CAS and member of the Academy of Sciences for the Developing World. His scientific contributions mainly cover plant tissue culture, hormone mechanism in development, as well as plant developmental response to environment. Xu, as a scientist and leader who has made an impact in the community, called up a lot of excellent young scientists returning to China. His efforts have promoted the fast development of China's plant and agricultural sciences.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"71 ","pages":"1-38"},"PeriodicalIF":23.9,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-arplant-081519-035831","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37759182","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}
Teresa J Clark, Longyun Guo, John Morgan, Jorg Schwender
{"title":"Modeling Plant Metabolism: From Network Reconstruction to Mechanistic Models.","authors":"Teresa J Clark, Longyun Guo, John Morgan, Jorg Schwender","doi":"10.1146/annurev-arplant-050718-100221","DOIUrl":"https://doi.org/10.1146/annurev-arplant-050718-100221","url":null,"abstract":"<p><p>Mathematical modeling of plant metabolism enables the plant science community to understand the organization of plant metabolism, obtain quantitative insights into metabolic functions, and derive engineering strategies for manipulation of metabolism. Among the various modeling approaches, metabolic pathway analysis can dissect the basic functional modes of subsections of core metabolism, such as photorespiration, and reveal how classical definitions of metabolic pathways have overlapping functionality. In the many studies using constraint-based modeling in plants, numerous computational tools are currently available to analyze large-scale and genome-scale metabolic networks. For <sup>13</sup>C-metabolic flux analysis, principles of isotopic steady state have been used to study heterotrophic plant tissues, while nonstationary isotope labeling approaches are amenable to the study of photoautotrophic and secondary metabolism. Enzyme kinetic models explore pathways in mechanistic detail, and we discuss different approaches to determine or estimate kinetic parameters. In this review, we describe recent advances and challenges in modeling plant metabolism.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"71 ","pages":"303-326"},"PeriodicalIF":23.9,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-arplant-050718-100221","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37609089","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}
Alexander R Leydon, Hardik P Gala, Sarah Guiziou, Jennifer L Nemhauser
{"title":"Engineering Synthetic Signaling in Plants.","authors":"Alexander R Leydon, Hardik P Gala, Sarah Guiziou, Jennifer L Nemhauser","doi":"10.1146/annurev-arplant-081519-035852","DOIUrl":"https://doi.org/10.1146/annurev-arplant-081519-035852","url":null,"abstract":"<p><p>Synthetic signaling is a branch of synthetic biology that aims to understand native genetic regulatory mechanisms and to use these insights to engineer interventions and devices that achieve specified design parameters. Applying synthetic signaling approaches to plants offers the promise of mitigating the worst effects of climate change and providing a means to engineer crops for entirely novel environments, such as those in space travel. The ability to engineer new traits using synthetic signaling methods will require standardized libraries of biological parts and methods to assemble them; the decoupling of complex processes into simpler subsystems; and mathematical models that can accelerate the design-build-test-learn cycle. The field of plant synthetic signaling is relatively new, but it is poised for rapid advancement. Translation from the laboratory to the field is likely to be slowed, however, by the lack of constructive dialogue between researchers and other stakeholders.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"71 ","pages":"767-788"},"PeriodicalIF":23.9,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-arplant-081519-035852","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37672397","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":"Exploring Uncharted Territories of Plant Specialized Metabolism in the Postgenomic Era.","authors":"Joseph R Jacobowitz, Jing-Ke Weng","doi":"10.1146/annurev-arplant-081519-035634","DOIUrl":"https://doi.org/10.1146/annurev-arplant-081519-035634","url":null,"abstract":"<p><p>For millennia, humans have used plants for food, raw materials, and medicines, but only within the past two centuries have we begun to connect particular plant metabolites with specific properties and utilities. Since the utility of classical molecular genetics beyond model species is limited, the vast specialized metabolic systems present in the Earth's flora remain largely unstudied. With an explosion in genomics resources and a rapidly expanding toolbox over the past decade, exploration of plant specialized metabolism in nonmodel species is becoming more feasible than ever before. We review the state-of-the-art tools that have enabled this rapid progress. We present recent examples of de novo biosynthetic pathway discovery that employ various innovative approaches. We also draw attention to the higher-order organization of plant specialized metabolism at subcellular, cellular, tissue, interorgan, and interspecies levels, which will have important implications for the future design of comprehensive metabolic engineering strategies.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"71 ","pages":"631-658"},"PeriodicalIF":23.9,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-arplant-081519-035634","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37741795","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}
Zhongchi Liu, Hong Ma, Sook Jung, Dorrie Main, Lei Guo
{"title":"Developmental Mechanisms of Fleshy Fruit Diversity in Rosaceae.","authors":"Zhongchi Liu, Hong Ma, Sook Jung, Dorrie Main, Lei Guo","doi":"10.1146/annurev-arplant-111119-021700","DOIUrl":"https://doi.org/10.1146/annurev-arplant-111119-021700","url":null,"abstract":"<p><p>Rosaceae (the rose family) is an economically important family that includes species prized for high-value fruits and ornamentals. The family also exhibits diverse fruit types, including drupe (peach), pome (apple), drupetum (raspberry), and achenetum (strawberry). Phylogenetic analysis and ancestral fruit-type reconstruction suggest independent evolutionary paths of multiple fleshy fruit types from dry fruits. A recent whole genome duplication in the Maleae/Pyreae tribe (with apple, pear, hawthorn, and close relatives; referred to as Maleae here) may have contributed to the evolution of pome fruit. MADS-box genes, known to regulate floral organ identity, are emerging as important regulators of fruit development. The differential competence of floral organs to respond to fertilization signals may explain the different abilities of floral organs to form fleshy fruit. Future comparative genomics and functional studies in closely related Rosaceae species with distinct fruit types will test hypotheses and provide insights into mechanisms of fleshy fruit diversity. These efforts will be facilitated by the wealth of genome data and resources in Rosaceae.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"71 ","pages":"547-573"},"PeriodicalIF":23.9,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-arplant-111119-021700","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37964178","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":"The Small GTPase Superfamily in Plants: A Conserved Regulatory Module with Novel Functions.","authors":"Erik Nielsen","doi":"10.1146/annurev-arplant-112619-025827","DOIUrl":"https://doi.org/10.1146/annurev-arplant-112619-025827","url":null,"abstract":"<p><p>Small GTP-binding proteins represent a highly conserved signaling module in eukaryotes that regulates diverse cellular processes such as signal transduction, cytoskeletal organization and cell polarity, cell proliferation and differentiation, intracellular membrane trafficking and transport vesicle formation, and nucleocytoplasmic transport. These proteins function as molecular switches that cycle between active and inactive states, and this cycle is linked to GTP binding and hydrolysis. In this review, the roles of the plant complement of small GTP-binding proteins in these cellular processes are described, as well as accessory proteins that control their activity, and current understanding of the functions of individual members of these families in plants-with a focus on the model organism <i>Arabidopsis</i>-is presented. Some potential novel roles of these GTPases in plants, relative to their established roles in yeast and/or animal systems, are also discussed.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"71 ","pages":"247-272"},"PeriodicalIF":23.9,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-arplant-112619-025827","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37964180","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":"Functions of Anionic Lipids in Plants.","authors":"Lise C Noack, Yvon Jaillais","doi":"10.1146/annurev-arplant-081519-035910","DOIUrl":"https://doi.org/10.1146/annurev-arplant-081519-035910","url":null,"abstract":"<p><p>Anionic phospholipids, which include phosphatidic acid, phosphatidylserine, and phosphoinositides, represent a small percentage of membrane lipids. They are able to modulate the physical properties of membranes, such as their surface charges, curvature, or clustering of proteins. Moreover, by mediating interactions with numerous membrane-associated proteins, they are key components in the establishment of organelle identity and dynamics. Finally, anionic lipids also act as signaling molecules, as they are rapidly produced or interconverted by a set of dedicated enzymes. As such, anionic lipids are major regulators of many fundamental cellular processes, including cell signaling, cell division, membrane trafficking, cell growth, and gene expression. In this review, we describe the functions of anionic lipids from a cellular perspective. Using the localization of each anionic lipid and its related metabolic enzymes as starting points, we summarize their roles within the different compartments of the endomembrane system and address their associated developmental and physiological consequences.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"71 ","pages":"71-102"},"PeriodicalIF":23.9,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-arplant-081519-035910","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37964181","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":"Evolution of Plant Hormone Response Pathways.","authors":"Miguel A Blázquez, David C Nelson, Dolf Weijers","doi":"10.1146/annurev-arplant-050718-100309","DOIUrl":"https://doi.org/10.1146/annurev-arplant-050718-100309","url":null,"abstract":"<p><p>This review focuses on the evolution of plant hormone signaling pathways. Like the chemical nature of the hormones themselves, the signaling pathways are diverse. Therefore, we focus on a group of hormones whose primary perception mechanism involves an Skp1/Cullin/F-box-type ubiquitin ligase: auxin, jasmonic acid, gibberellic acid, and strigolactone. We begin with a comparison of the core signaling pathways of these four hormones, which have been established through studies conducted in model organisms in the Angiosperms. With the advent of next-generation sequencing and advanced tools for genetic manipulation, the door to understanding the origins of hormone signaling mechanisms in plants beyond these few model systems has opened. For example, in-depth phylogenetic analyses of hormone signaling components are now being complemented by genetic studies in early diverging land plants. Here we discuss recent investigations of how basal land plants make and sense hormones. Finally, we propose connections between the emergence of hormone signaling complexity and major developmental transitions in plant evolution.</p>","PeriodicalId":8335,"journal":{"name":"Annual review of plant biology","volume":"71 ","pages":"327-353"},"PeriodicalIF":23.9,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-arplant-050718-100309","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37609020","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}